(PDF) (PDF; archived from the original) (PDF; archived from the original)Forked from here, with bold letters in section titles from here, and some 1950's Mullard-Philips and RMA-designated semiconductors from here.
Colored all intra-article wikilinks green - resulting in this reference wikitext
Content changes from there:
*'''6590''' – 10 A<sub>peak</sub> Pulsed cold-cathode, gas-filled, arc-discharge triode thyratron*'''7813''' – Subminiature, top-viewing, cold-cathode triode thyratron with a keep-alive/primer electrode and a disc-shaped, brightly glowing cathode, used as a latching indicator*'''8191''' (135 kW), '''8192''' (450 kW) – Miniature, ceramic/metal Hydrogen thyratron*'''8193''' – 100 mA Medium-μ power triode used as series-pass regulator in stabilized DC power supplies, hard-glass envelope*'''8253''' – Hydrogen triode thyratron with a Hydrogen reservoir; replaces 5C22, 6587, 6587A*'''8373''' – 12 kV, 60 A<sub>peak</sub>, 250 mA<sub>avg</sub> Ceramic/metal, Hydrogen half-wave rectifier*'''8374''' – 15 kV, 100 A<sub>peak</sub>, 500 mA<sub>avg</sub> Ceramic/metal, Hydrogen half-wave rectifier*'''8377''' – 26 kV, 2 kA<sub>peak</sub>, 7 A<sub>avg</sub> Ceramic/metal, Hydrogen half-wave rectifier*'''2399''' – Dual medium-μ power triode used as series-pass regulator in [[Regulated power supply|stabilized DC power supplies]]*'''9013''' = '''Y-676A''' – 100 kW, 110 MHz Water-cooled, glass/metal, pulse-rated beam power tetrode, 15.5 V/215 A filament*'''9019''' = '''YC130''' – 18 kW, 110 MHz Forced-air-cooled, glass/metal beam power tetrode, 7.5 V/160 A filament*'''21A7''' – 7D7 Triode/heptode oscillator/mixer with a 21 V/160 mA heater*'''3C30''' – 25 W Power triode, μ = 85, 5.6 V/2.5 A filament, ''[[#Micanol|{{color|Green|Micanol}}]]'' UX4 Bayonet base with anode on top cap*'''1K015CA''' (5.35 to 5.95 GHz, Coaxial), '''1K015CG''' (5.35 to 5.95 GHz, RG-50/U waveguide), '''1K015XA''' (8.4 to 9.6 GHz, coaxial), '''1K015XG''' (8.4 to 9.6 GHz, UG-39/U waveguide flange) – 100 mW Reflex Klystron*'''1K20KA''' (10.7 to 11.5 GHz), '''1K20XD-A''' (10.0 to 10.7 GHz), '''1K20XD-S''' (10.5 to 11.0 GHz), '''1K20XF-A''', '''1K20XF-B''' (10.1 to 10.4 GHz), '''1K20XK''' (9.2 to 10.0 GHz), '''1K20XN-A''' (8.5 to 11.9 GHz), '''1K20XS''' (8.5 to 9.2 GHz) – 100 mW, contact/conduction-cooled Reflex Klystron, RG-52/U waveguide*'''1K75CH''' (Insulated [[TNC connector|TNC jack]] coaxial output for use in [[radar altimeter]]s), '''1K75CK''' (half-height waveguide output), '''1K75CL-A''' (half-height RG-49/AU waveguide, for use in radar altimeters), '''1K75CS''' (with [[Isolator (microwave)|isolator]]) – 1 W, 4.3 GHz Reflex Klystron*'''3KM3LB''' – 3 kW, 350 to 475 MHz 3-cavity Klystron*'''3KM300LA''' – 100 kW, 345 to 455 MHz 3-cavity Klystron*'''3K2500LX''' – 1 kW, 980 to 1200 MHz 3-cavity, electromagnet-focused, Klystron*'''3KM3000LA''' – 720 W, 385 to 585 MHz 3-cavity Klystron*'''3KM4000LT''' – 40 kW<sub>peak</sub>, 1 kW<sub>avg</sub>, 960 to 1215 MHz 3-cavity, electromagnet-focused, pulsed Klystron*'''3K20000LA''' (470 to 580 MHz), '''3K20000LF''' (580 to 720 MHz), '''3K20000LK''' (720 to 890 MHz) – 2.75 kW 3-cavity, electromagnet-focused Klystron for use in TV transmitters*'''3K50000LA''' (470 to 580 MHz), '''3K50000LF''' (580 to 720 MHz), '''3K50000LK''' (720 to 890 MHz) – 6 kW 3-cavity, electromagnet-focused Klystron for use in TV transmitters*'''3KM50000PA''' – 20 W, 225 to 400 MHz 3-cavity Klystron*'''3K210000LQ''' – 75 kW, 755 to 985 MHz Forced-air and water-cooled, electromagnet-focused 3-cavity Klystron*'''4K3CB''' (4.4 to 5.0 GHz), '''4KM3CB''' (With modulating anode), '''4K3SJ''' (1.7 to 2.4 GHz), '''4K3SK''' (1.7 to 2.4 GHz), '''4K3SL''' (2.4 to 2.7 GHz), '''4K3SM''' (2.65 to 2.86 GHz) – 1 kW, Permanent magnet-focused, 4-cavity Klystron*'''4KP3SM''' – 75 W<sub>peak</sub>, 15 W<sub>avg</sub>, 2.65 to 2.86 GHz 4-cavity pulsed Klystron*'''4K4CH''' – 1 kW, 4.4 to 5.0 GHz Permanent magnet-focused, 4-cavity Klystron*'''4K5SL''' – 1 kW, 1.7 to 2.4 GHz Permanent magnet-focused, 4-cavity Klystron*'''4K50LB''' – 10 kW, 350 to 470 MHz 4-cavity Klystron*'''4KM50SJ''' (1.7 to 2.4 GHz), '''4KM50SK''' (2.55 to 2.7 GHz) – 1 kW, Electromagnet-focused, 4-cavity Klystron used in S-band [[Tropospheric scatter|troposcatter systems]]*'''4KM70LA''' (470 to 610 MHz), '''4KM70LF''' (590 to 720 MHz), '''4KM70LH''' (720 to 890 MHz, for use in TV transmitters), '''4KM70SJ''' (1.7 to 2.4 GHz), '''4KM70SK''' (2.55 to 2.7 GHz, for use in S-band troposcatter systems) – 1 kW, Electromagnet-focused, 4-cavity Klystron*'''4KMV100LA''' (470 to 610 MHz), '''4KMV100LF''' (590 to 720 MHz), '''4KMV100LH''' (720 to 890 MHz) – 35 kW Water/vapor-cooled, electromagnet-focused, 4-cavity Klystron with a [[Titanium]] [[Ion pump|ion getter pump]], for use in TV transmitters*'''4KMV150LA''' (470 to 610 MHz), '''4KMV150LF''' (590 to 720 MHz), '''4KMV150LH''' (720 to 890 MHz) – 50 kW Water/vapor-cooled, electromagnet-focused, 4-cavity Klystron with a Titanium ion getter pump, for use in TV transmitters*'''4KM300LA''' (345 to 455 MHz) – 100 kW, Electromagnet-focused, 4-cavity Klystron*'''4KM3000LQ''' (710 to 985 MHz), '''4KM3000LR''' (610 to 985 MHz) – 2 kW Forced-air cooled, electromagnet-focused, 4-cavity Klystron*'''4KMP10000LF''' – 400 kW<sub>peak</sub>, 4 kW<sub>avg</sub>, 570 to 630 MHz Forced-air cooled, electromagnet-focused, 4-cavity pulsed Klystron*'''4KM50000LA''', '''4KM50000LA3''' (400 to 610 MHz), '''4KM50000LF''' (610 to 790 MHz), '''4KM50000LQ''' (600 to 985 MHz), '''4KM50000LR''' (755 to 985 MHz) – 10 kW Forced-air and water-cooled, electromagnet-focused, 4-cavity Klystron*'''4K50000LQ''' – 10 kW, 720 to 980 MHz Forced-air and water-cooled, permanent magnet-focused 4-cavity Klystron*'''4KM170000LA''' – 75 kW, 325 to 500 MHz Forced-air and water-cooled, electromagnet-focused, 4-cavity Klystron*'''5K50CB''' – 10 kW, 4.4 to 5.0 GHz [[Ethylene glycol#Coolant and heat-transfer agent|Ethylene glycol]]-cooled, electromagnet-focused 5-cavity Klystron used in C-band troposcatter systems*'''5KM50SJ''' – 1 kW, 1.7 to 2.4 GHz Electromagnet-focused, 5-cavity Klystron used in S-band troposcatter systems*'''5K70SH''' – 30 kW, [[ISM radio band|2.45 GHz]] Forced-air and water-cooled, electromagnet-focused 5-cavity Klystron used for industrial, microwave [[dielectric heating]]*'''5KM70SF''' (1.71 to 1.8 GHz), '''5KM70SJ''' (1.7 to 2.4 GHz) – 1 kW, Electromagnet-focused, 5-cavity Klystron used in S-band troposcatter systems*'''5KM300SI''' – 100 kW, 2.1 to 2.4 GHz Forced-air and water-cooled, electromagnet-focused 5-cavity Klystron used in ''[[Unified S-band]]'' ground transmitters of [[History of the Deep Space Network|spacecraft communications systems]]*'''5K50000LQ''' – 10 kW, 720 to 980 MHz Forced-air and water-cooled, permanent magnet-focused 5-cavity Klystron*'''5K210000LQ''' – 75 kW, 755 to 985 MHz Forced-air and water-cooled, electromagnet-focused 5-cavity Klystron*'''4500''' – {{cvt|1|in|mm}} Slow-scan Vidicon, Ditetrar 8-pin base*'''4503A''' – {{cvt|1|in|mm}} Ruggedized, separate mesh Vidicon, Ditetrar 8-pin base*'''4507''' – {{cvt|2|in|mm}} 12-stage, head-on, S24 Photomultiplier, 21-pin base*'''4516''' (12-pin base), '''4517''' (Duodecal 12-pin base) – {{cvt|1+1⁄2|in|mm}}, 10-stage, head-on, S24 Photomultiplier*'''4518''' – {{cvt|2|in|mm}} 10-stage, head-on, S24 Photomultiplier, Diheptal 14-pin base*'''4521''' – {{cvt|3|in|mm}} 10-stage, head-on, ''Venetian Blind''-type, S24 photomultipliers, Diheptal 14-pin base*'''4522''' – {{cvt|5|in|mm}} 14-stage, head-on, S24 Photomultiplier, 21-pin base*'''4523''' (2 in), '''4524''' ({{cvt|3|in|mm}}), '''4525''' ({{cvt|5|in|mm}}) – 10-stage, head-on, ''Venetian Blind''-type, S24 photomultipliers, Diheptal 14-pin base*'''4526''' – 10-Stage, side-on, S20 photomultiplier, [[Dormer]] window, Duodecal 12-pin base*'''4542''' – {{cvt|1|in|mm}} Storage Vidicon, Ditetrar 8-pin base*'''4555''' – {{cvt|1+1⁄8|in|mm}}, 10-Stage, side-on, S24 photomultiplier, ''[[Compactron]]'' Duodecar 12-pin base*'''4589''' – 8507A Vidicon with a fiber-optic faceplate*'''4804''', '''4804A''', '''4804A/P1''', '''4804A/P2''' – 16 mm, [[Silicon]] intensifier target camera tube*'''4807''', '''4807A''' – {{cvt|3|in|mm}}, S25 ''Isocon'' camera tube, magnetic focusing and deflection, fiber optic interface to X-ray image intensifiers with P20 Phosphors and fiber optic output*'''4810/8480''', '''4811/8134''' – Vidicons used in [[telecine]]s===={{anchor|WE100s}}'''100'''s====*'''101D''' – 230 mW AF Power triode, μ = 6, 4.5 V/1 A filament, UV4 4-pin Bayonet base*'''101F''', *'''101J''' (Reduced insulation leaks) – 250 mW RF/AF Power triode, μ = 6.5, 4.5 V/500 mA filament, UV4 4-pin Bayonet base*'''101L''', '''101M''' (Quickstart filament) – 100 mW AF Power triode, μ = 6.5, 4.5 V/250 mA filament, UV4 4-pin Bayonet base*'''102D''', '''102G''' (Reduced insulation leaks and sputter noise) – AF Triode, μ = 30, 2.1 V/1 A filament, UV4 4-pin Bayonet base*'''102E''' – AF Triode, μ = 26-34, 2-2.5 V/950 mA filament, UV4 4-pin Bayonet base*'''102F''' – AF Triode, μ = 30, 2.1 V/500 mA filament, UV4 4-pin Bayonet base*'''102L''' – AF Triode, μ = 30, 2.1 V/250 mA filament, UV4 4-pin Bayonet base*'''104D''' – 735 mW AF Power triode, μ = 2.5, 4.5 V/1 A filament, UV4 4-pin Bayonet base*'''YK1195''', '''YK1196''', '''YK1197''' – YK1190, YK1191, YK1192 with a modulating anode for amplifying both the video and audio carriers with the same beam supply*'''YK1198''' – 60 kW, 600 to 800 MHz Water-cooled, electromagnet-focused, 4-cavity Klystron used in TV transmitters*'''YK1210''' – 1 kW, 12 GHz Forced-air cooled, permanent magnet-focused, 4-cavity Klystron used in TV microwave links*'''YK1240''' – 325 kW<sub>peak</sub>, 1.3 GHz Water-cooled, electromagnet-focused, pulsed Klystron*'''YK1250''' – 350 kW<sub>avg</sub>, 999.3 MHz Water-cooled, electromagnet-focused Klystron*'''YK1263''' (58 kW), '''YK1265''' (64 kW) – 470 to 860 MHz Water or water/vapor-cooled, electromagnet-focused, 4-cavity Klystron used in TV transmitters*'''YK1295''' (470 to 610 MHz), '''YK1296''' (590 to 720 MHz), '''YK1297''' (710 to 860 MHz) – 50 kW Water-cooled, electromagnet-focused, 4-cavity Klystron with a modulating anode used in TV transmitters*'''YK1300''' (600 kW<sub>avg</sub>), '''YK1301''' (750 kW<sub>avg</sub>), '''YK1305''' (350 kW<sub>avg</sub>) – 499.7 MHz Water-cooled, electromagnet-focused Klystron*'''YK1302''' (800 kW<sub>avg</sub>), '''YK1303''' (1 MW<sub>avg</sub>) – 508.6 MHz Water/vapor-cooled, electromagnet-focused Klystron*'''YK1350''' – 1 MW<sub>avg</sub>, 353 MHz Water-cooled, electromagnet-focused Klystron*'''YK1510''', '''YK1511''', '''YK1512''' – 20 MW<sub>peak</sub>, 20 kW<sub>avg</sub>, S-band, Water-cooled, electromagnet-focused, 5-cavity pulsed Klystron with an ion getter pump*'''YK1600''' – 35 MW<sub>peak</sub>, 15.75 kW<sub>avg</sub>, 2998.5 MHz Water-cooled, electromagnet-focused, 5-cavity pulsed Klystron, ion getter pump, used in linear particle accelerators*'''4636''' – Pentode used as preamplifier, 4 V/1.1 A heater, O5A 5-pin base with anode on top cap*'''4646''' – 1 kV<sub>[[Peak inverse voltage|PIV]]</sub>, 75 mA Half-wave rectifier, 4 V/1.3 A filament, 4-pin base*'''4650''' – 25 W AF Power pentode, 4 V/2 A filament, O5A 5-pin base*'''4673''' – RF Pentode, 4 V/1.35 A heater, side-contact 8 base with control grid on top cap*'''4682''' – 9 W AF Power pentode, 4 V/1 A heater, side-contact 8 base with control grid on top cap*'''4689''' – 18 W AF Power pentode, 6.3 V/1.35 A heater, side-contact 8 base*'''4690''' – Helium-filled triode thyratron, 4 V/1.3 A heater, side-contact 8 base*'''4694''' – 9 W AF Power pentode, 6.3 V/900 mA heater, side-contact 8 base*'''4699''' – 18 W AF Power pentode, 6.3 V/1.5 A heater, side-contact 8 base*'''4001''' (4-pin Metal case), '''4002''' ([[Mahogany]] box with 4 top terminals), '''4003''' (metal case with 4 soldering tags) – Filament-heated [[thermocouple]]s in an evacuated glass envelope, usable as an [[True RMS converter|RMS heating current-to-DC converter]], filament and thermojunction rating specified by suffix letter(s)*'''4003A''', '''4004A/B/C''', '''4006A/B''', '''4007A''', '''4008A''', '''4120AA''', '''4121AA/AB''' – [[Electrical ballast#Self-variable resistors|Ballast tubes]] used to steady the filament currents in telephone repeaters, Edison screw lamp base*'''4006A''' – 10 kW, 3 MHz Water-cooled power triode; not to be confused with the above ballast tube*'''4007A''', '''4008A''' – 10 kW, 45 kV Water-cooled half-wave rectifier; not to be confused with the above ballast tubes*'''4009A/B''' – 20 kW, 3 MHz Water-cooled power triode; not to be confused with the RCA 4009 Traveling-wave tube*'''4013A''' – 11mA Nickel wire fuse in an evacuated glass envelope*'''4013C/D''' (5 kW), '''4014A''' (12 kW) – 15 MHz Water-cooled power triodes*'''4017B''' – Half-wave Mercury-vapor rectifier, E27 Edison screw lamp base with anode on top cap*'''4018AB''', '''4050AB''' (Blue, {{cvt|4+1⁄2|in|cm}}), '''4018AD''', '''4050AD''' (long persistence), '''4018AG''', '''4050AG''' (green), '''4018BB/BD/BG''', '''4050BB/BD/BG''' ({{cvt|7|in|cm}}) – Gas-filled CRTs*'''4030A/C''' – 80 kW, 2 MHz Water-cooled power triode*'''4034A''' (26 pF), '''4034A''' (40 pF) – 40 kV<sub>RMS</sub> Vacuum capacitors*'''4037A''', '''4048A''' – Half-wave Mercury-vapor rectifier, A4A European 4-pin base*'''4039A''' – Mercury-vapor thyratron, O5A European 5-pin base*'''4045A''' = STC '''4A/137B''' – 4.2 W<sub>output</sub> Power tetrode, 5 V/1.6 A filament, O5A European 5-pin base*'''4046A''' = STC '''5A/128B''' – Pentode, 4 V/950 mA heater, O5A European 5-pin base with anode on top cap*'''4047B''' – 10 kW, 3 MHz Water-cooled power triode*'''4049C/D''' – Half-wave Mercury-vapor rectifier, E40 ''Goliath'' Edison screw lamp base with anode on top cap*'''4049GD''' = STC '''3V/500A''' – Mercury-vapor thyratron, 4-pin base with anode on top cap*'''4052A''' – 60 W Power pentode, 7.5 V/3 A heater, UY5 American 5-pin base with anode on top cap*'''4053A''' – 12 kW Water-cooled AF power triode; not to be confused with the RCA 4053 Traveling-wave tube*'''4058A/B''' – 12 kW, 3 MHz Water-cooled power triode; not to be confused with the RCA 4058 power triode*'''4059A''', '''4075A''' – Half-wave vacuum rectifiers*'''4061A''' – 10 W Power pentode, 6.3 V/800 mA heater, U7B American 7-pin base with anode on top cap*'''4049A''' (E40 ''Goliath'' Edison screw lamp base), '''4049A''' (4-pin Bayonet base) – Half-wave Mercury-vapor rectifier with anode on top cap*'''4065A''' – 8 kV, 1 mA, 23 MHz [[Instrumentation]] rectifier diode, 2.5 V/8 A filament, [[Dielectric loss|low loss]] 4-pin base; not to be confused with the Philips 4065 electrometer triode*'''4066A''' – Pentode, 4 V/2 A heater, M7A British 7-pin base; not to be confused with the Philips 4066 electrometer triode*'''4069A''' = STC '''5C/101A''' – 100 W, 30 MHz Power pentode, 10 V/5.4 A heater, UY5 American 5-pin base with anode on top cap; not to be confused with the Philips 4069 electrometer triode*'''4072A''' – X-ray tube; not to be confused with the RCA 4072 power triode*'''4074A''' = STC '''33A/138A''' – 5 W, 100 MHz Dual power triode, 6.3 V/800 mA heater, U7B American 7-pin base with anodes on dual top cap*'''4078A''' = STC '''2V/530E''' or '''2V/531E''', '''4079A''' = STC '''2V/560E''' or '''2V/561E''', '''4080A''' = STC '''2V/590E''' – Half-wave Mercury-vapor rectifiers, 2-pin base with anode on top cap*'''4078GA''' = STC '''3V/530E''' or '''3V/531E''', '''4079GA''' = STC '''3V/560E''' or '''3V/561E''', '''4080GA''' = STC '''3V/590E''' – Mercury-vapor thyratrons, 3-pin base with anode on top cap*'''4081A''' – 20 kW, 5 MHz Water-cooled power triode*'''XA1000''', '''XA1001''' – [[#EIA_SpecResp|{{color|Green|S11}}]] [[Phototube]], 13-pin base*'''XA1002''' (S4), '''XA1003''' (S1) – High-speed Phototube, all-glass coaxial*'''XP1006''' – 10-stage, head-on, S24 Photomultiplier*'''XP1015''' – 32 mm, 10-stage, head-on, S11 photomultiplier, Duodecal 12-pin base*'''XP1016''' – 10-stage, head-on, S20 photomultiplier*'''XP1017''' – 32 mm, 10-stage, head-on, S20r photomultiplier, Duodecal 12-pin base*'''XP1034''' – 10-stage, head-on, S24 Photomultiplier*'''XP1041''' – 110 mm, 14-stage, head-on, S24 photomultiplier, Bidecal 20-pin base*'''XP1060''' – 32 mm, 10-stage, head-on photomultiplier, [[Wavelength|λ]]<sub>max</sub> = 440 nm*'''XP1070''' – 63.5 mm, 10-stage, head-on photomultiplier, λ<sub>max</sub> = 440 nm*'''XP1080''' – 26 mm, 4-stage, head-on photomultiplier, λ<sub>max</sub> = 440 nm*'''XP1090''' – 38 mm, 10-stage, head-on photomultiplier, λ<sub>max</sub> = 440 nm*'''XP1100''' – 26 mm, 4-stage, head-on, infrared-sensitive photomultiplier, λ<sub>max</sub> = 800 nm*'''XP1119''' – 9-stage, head-on, S24 photomultiplier*'''XP1143''' – 6-stage, side-on, S4 photomultiplier*'''XP1210''' – 10-stage, S11 Photomultiplier*'''XP1220''' – 13 mm, 10-stage, head-on, S11 Photomultiplier*'''XP1230''' – 12-stage, S24 Photomultiplier*'''XP1600''' – {{Nowrap|5 mm × 10 mm}}, 16-stage, windowless photomultiplier for UV (λ < 140 nm) spectroscopy or heavy ion (> 1 keV) or electron (0.1...10 keV) detection in a high-vacuum environment up to 1 mPa, Cu-Be cathode (maximum spectral sensitivity at 68 ± 10 nm) and dynodes, anode pulse rise time ca. 3 ns, 19-pin glass base, built-in resistor ladder, built-in emitting test filament which can be used for gain measurement using the single-electron spectrum method: The filament is heated to a dull red, this results in an electron flux small enough to be counted one electron at a time{{pb}}The XP1600 is delivered in a roughly evacuated cylindrical glass envelope, to be opened in a clean, dry atmosphere, preferably dry Nitrogen, before use; max. 300 °C [[bake-out]]. Oil vapor from a vacuum pump contaminates the dynodes and causes loss of gain*'''XP1911''' – 14 mm, 10-stage, head-on, S24 photomultiplier, Cu-Be dynodes, 12-pin base*'''XP1918''' – 14 mm, 10-stage, head-on, Sb-Rb-Cs photomultiplier with a Silica window, Cu-Be dynodes, 12-pin base*'''XP2000''' – 44 mm, 10-stage, head-on, S24 photomultiplier for scintillation counting and photometry, Cu-Be dynodes, modified Diheptal 14-pin base, since serial-# 10001 19-pin base*'''XP2008''' – 32 mm, 10-stage, head-on, "super-S11" photomultiplier for scintillation counting and photometry, Cu-Be dynodes, Duodecal 12-pin base*'''XP2010''' – 32 mm, 10-stage, head-on, "super-S11" photomultiplier for r-ray and γ-ray scintillation spectrometry, Cu-Be dynodes, Duodecal 12-pin base*'''XP2011''' (Diheptal 14-pin base), '''XP2011B''' (Duodecal 12-pin base) – 32 mm, 10-stage, head-on, Sb-Rb-Cs photomultiplier, Cu-Be dynodes*'''XP2012''' (Diheptal 14-pin base), '''XP2012B''' (Duodecal 12-pin base) – 32 mm, 10-stage, head-on, S24 photomultiplier, Cu-Be dynodes*'''XP2017B''' – 34 mm, 10-stage, head-on, S20R photomultiplier, Cu-Be dynodes, Duodecal 12-pin base*'''XP2018B''' – 32 mm, 10-stage, head-on, Sb-Rb-Cs photomultiplier with a Silica window, Cu-Be dynodes, Duodecal 12-pin base; replaces 150UVP*'''XP2020''' ([[Borosilicate glass]] window), '''XP2020Q''' (Silica window) – 44 mm, 12-stage, head-on, S24 photomultiplier for coincidence measurements and [[Cherenkov radiation|Cherenkov]] detection, Ag-Mg dynodes, Bidecal 20-pin base*'''XP2023B''' – 32 mm, 8-stage, head-on, S20 photomultiplier, Cu-Be dynodes, Duodecal 12-pin base; replaces XP2013B*'''XP2030''' – 70 mm, 10-stage, head-on, S24 photomultiplier for nuclear-medical γ-ray scintillation detection, Cu-Be dynodes, modified Diheptal 14-pin base, since serial-# 10001 19-pin base*'''XP2040''' ([[Plastic]] adapter up to 300 nm), '''XP2040Q''' (Silica adapter up to 200 nm) – 110 mm, 14-stage, head-on, S11 photomultiplier for coincidence measurements and Cherenkov counting, Cu-Be dynodes, Bidecal 20-pin base*'''XP2041''' ([[Plastic]] adapter), '''XP2041Q''' (Silica adapter) – 110 mm, 14-stage, head-on, S24 photomultiplier for coincidence measurements and Cherenkov counting, Cu-Be dynodes, Bidecal 20-pin base; replace XP2040 resp. XP2040Q*'''XP2050''' – 110 mm, 10-stage, head-on, ''[[Window blind#Venetian|Venetian Blind]]''-type, S24 photomultiplier for Cherenkov counting and scintillation detection, Cu-Be dynodes, Diheptal 14-pin base*'''XP2061''' – 32 mm, 10-stage, head-on, Sb-Rb-Cs photomultiplier*'''XP2062''' (Diheptal 14-pin base), '''XP2062B''' (Duodecal 12-pin base) – 34 mm, 10-stage, head-on, S24 photomultiplier, Cu-Be dynodes; replace XP2062 resp. XP2062B*'''XP2071''' (Diheptal 14-pin base), '''XP2071B''' (Duodecal 12-pin base) – 34 mm, 10-stage, head-on, S24 photomultiplier, Cu-Be dynodes; replace XP2011 resp. XP2011B*'''XP2072''' (Diheptal 14-pin base), '''XP2072B''' (Duodecal 12-pin base) – 34 mm, 10-stage, head-on, S24 photomultiplier, Cu-Be dynodes; replace XP2012 resp. XP2012B*'''XP2102''' (19-pin base), '''XP2102B''' (Diheptal 14-pin base) – 46 mm, 10-stage, head-on, ''Venetian Blind''-type, S24 photomultiplierv; replace XP2000UB resp. XP2000B*'''XP2202''' (19-pin base), '''XP2202B''' (Diheptal 14-pin base) – 44 mm, 10-stage, head-on, S24 photomultiplier, Cu-Be dynodes*'''XP2203B''' – 44 mm, 10-stage, head-on, S20 photomultiplier, Cu-Be dynodes, Diheptal 14-pin base*'''XP2212''' (19-pin base), '''XP2202B''' (Bidecal 20-pin base) – 44 mm, 12-stage, head-on, S24 photomultiplier, Cu-Be dynodes*'''XP2230''' (21-pin base), '''XP2230B''' (Bidecal 20-pin base) – 44 mm, 12-stage, head-on, S24 photomultiplier, Ag-Mg dynodes; replace 56AVP and 56DVP*'''XP2233B''' – 44 mm, 12-stage, head-on, S20 photomultiplier, Cu-Be dynodes, Bidecal 20-pin base; replaces 56TVP*'''XP2242B''' – 44 mm, 6-stage, head-on, S24 photomultiplier, Cu-Be dynodes, Bidecal 20-pin base*'''XP2252''' (21-pin base), '''XP2202B''' (Bidecal 20-pin base) – 44 mm, 12-stage, head-on, S24 photomultiplier, Cu-Be dynodes; replace XP2230 resp. XP2230B*'''XP2254B''' – 44 mm, 12-stage, head-on, S20 photomultiplier with a Silica window, Cu-Be dynodes, Bidecal 20-pin base; replaces 56TUVP*'''XP2262''' (19-pin base), '''XP2262B''' (Bidecal 20-pin base) – 44 mm, 12-stage, head-on, S24 photomultiplier, Cu-Be dynodes; replace XP2232 resp. XP2232B, 56AVP, 56DVP*'''XP2312''' (19-pin base), '''XP2312B''' (Bidecal 20-pin base) – 68 mm, 12-stage, head-on, S24 photomultiplier, Cu-Be dynodes*'''XP2412''' (19-pin base), '''XP2412B''' (Diheptal 14-pin base) – 70 mm, 10-stage, head-on, ''Venetian Blind''-type, S24 photomultiplier, Cu-Be dynodes; replace XP2030UB resp. XP2030*'''XP2432''' (19-pin base), '''XP2432B''' (Diheptal 14-pin base) – 56 mm, 10-stage, head-on, ''Venetian Blind''-type, S24 photomultiplier, Cu-Be dynodes*'''XP2962''' – 23 mm, 8-stage, head-on, S24 photomultiplier, Cu-Be dynodes, 14 long + 1 short pin base*'''XP2963''' – 23 mm, 8-stage, head-on, S20 photomultiplier, Cu-Be dynodes, 14 long + 1 short pin base*'''XP2972''' – 23 mm, 10-stage, head-on, S24 photomultiplier, Cu-Be dynodes, 14 long + 1 short pin base*'''XP2982''' – 23 mm, 11-stage, head-on, S24 photomultiplier, Cu-Be dynodes, 14 long + 1 short pin base*'''XP3102''' (19-pin base), '''XP3102B''' (Diheptal 14-pin base) – 46 mm, 8-stage, head-on, S24 photomultiplier, Cu-Be dynodes; replace XP2102 resp. XP2102B*'''XP3202''' (19-pin base), '''XP3202B''' (Diheptal 14-pin base) – 46 mm, 8-stage, head-on, S24 photomultiplier, Cu-Be dynodes; replace XP2202 resp. XP2202B*'''XP3422''' (19-pin base), '''XP3422B''' (Diheptal 14-pin base) – Hexagonal 56 mm (between flats), 8-stage, head-on, S24 photomultiplier, Cu-Be dynodes; replace XP2422 resp. XP2422B*'''XP3462''' (19-pin base), '''XP3462B''' (Bidecal 20-pin base) – 68 mm, 8-stage, head-on, S24 photomultiplier, Cu-Be dynodes*'''XP4702''' – 20 mm × 20 mm, 10-stage, head-on, 64-channel, S24 photomultiplier with common dynodes and an 8×8 anode array, Borosilicate glass window, used for fibre readout, Cherenkov imaging or spectrophotometry*'''XQ1003''', '''XQ1007''' (6.3 V/300 mA heater), '''XQ1004''', '''XQ1008''' (6.3 V/95 mA heater) – 26 mm, [[#EIA_SpecResp|{{color|Green|S18}}]] [[Video camera tube#Vidicon|Vidicon]], resolution ≥600 TV lines*'''XQ1026/R''' – Industrial-grade XQ1025*'''XQ1060''' (For use with medical X-ray image intensifiers), '''XQ1061''' (broadcast-grade), '''XQ1062''' (industrial-grade), '''XQ1063''' (low-definition industrial-grade for non-critical applications), '''XQ1064''' (commercial-grade for non-critical applications), '''XQ1065''' (film scanning), '''XQ1066''' (high definition), '''XQ1067''' (standard definition) – 1", {{Nowrap|12.1 mm × 17.8 mm}}, S18 Vidicons*'''XQ1080/L/B/G/R''' – {{cvt|1|in|mm}} Color TV broadcast-grade ''Plumbicon'', ACT electron gun, internal light bias, separate mesh, resolution ≥750 TV lines{{pb}}An anti-[[comet tail]] ('''ACT''') electron gun improves highlight handling by increasing and widening the electron beam during [[Horizontal blanking interval|scan retrace]] to discharge the target's [[parasitic capacitance]]*'''XQ1081''' – Industrial-grade XQ1080*'''XQ1090/L/B/G/R''', '''XQ1100/L/B/G/R''' – {{cvt|1|in|mm}} Color TV broadcast-grade ''Plumbicon'' with anti-comet tail electron gun and a light pipe for bias lighting, separate mesh*'''XQ1091''', '''XQ1101''' – Industrial-grade XQ1090, XQ1100*'''XQ1110''' (High definition), '''XQ1111''' (standard definition) – 1", {{Nowrap|9.6 mm × 12.8 mm}}, IR-sensitive Vidicon*'''XQ1120''' (High definition), '''XQ1121''' (standard definition) – 1", {{Nowrap|9.6 mm × 12.8 mm}}, S18 Vidicons, separate mesh*'''XQ1130''' (High definition), '''XQ1131''' (standard definition) – {{cvt|1⁄2|in|mm}}, {{Nowrap|4.5 mm × 6 mm}} S18 Vidicon, separate mesh*'''XQ1140''', '''XQ1150''' (With fiber optics) – 1", {{Nowrap|9.6 mm × 12.8 mm}} S20 Vidicons with image intensifier tubes for night vision TV*'''XQ1160''' (High definition), '''XQ1161''' (standard definition) – 1", {{Nowrap|9.6 mm × 12.8 mm}}, Ruggedized S18 Vidicons, separate mesh*'''XQ1170''' (Very high definition), '''XQ1171''' (high definition), '''XQ1172''' (standard definition) – 1", {{Nowrap|9.6 mm × 12.8 mm}}, X-ray sensitive Vidicon, separate mesh*'''XQ1180''' (High definition), '''XQ1181''' (standard definition) – 1", {{Nowrap|9.6 mm × 12.8 mm}}, [[Slow-scan television|Slow scan]] Vidicons, separate mesh*'''XQ1190''' (Very high definition), '''XQ1191''' (high definition), '''XQ1192''' (standard definition) – 1", {{Nowrap|9.6 mm × 12.8 mm}}, S20R ''[[Apollo TV camera#Specifications|Secondary Emission Conductivity]]'' tube{{pb}}A SEC tube has a photocathode, the electrons are projected via an [[electrostatic lens]] onto an Aluminum + porous {{chem2|KCl|link=Potassium chloride}} target*'''XQ1193''' (High definition), '''XQ1194''' (standard definition) – 1", {{Nowrap|9.6 mm × 12.8 mm}}, S20→P20 SEC tube with image intensifier*'''XQ1220''' ({{Nowrap|12.1 mm × 17.8 mm}}), '''XQ1221''' (18 mm), '''XQ1222''' (21 mm) – 30 mm, [[Product binning|Binned]] (broadcast/A-grade) color TV ''Plumbicon'', ACT, internal light bias, separate mesh, non-[[Cladding (fiber optics)|cladded fiber optic]]*'''XQ1223''', '''XQ1224''', '''XQ1225''', '''XQ1233''', '''XQ1234''', '''XQ1235''' – B-grade XQ1220, XQ1221, XQ1222, XQ1230, XQ1231, XQ1232*'''XQ1230''', '''XQ1231''', '''XQ1232''' – Black-cladded fiber optic XQ1220, XQ1221, XQ1222*'''XQ1240'''s – {{cvt|1|in|mm}}, S18 Vidicons with separate mesh::*'''XQ1240''' – Matched to X-ray image intensifiers:*'''XQ1240/4809''' – Broadcast-grade for critical applications:*'''XQ1240/4809B''' – Broadcast-grade for blue channel:*'''XQ1240/4846B''', '''XQ1240/8507A''' – High-quality industrial-grade*'''XQ1241'''s – {{cvt|1|in|mm}}, S18 Vidicons with separate mesh::*'''XQ1241''', , '''XQ1241/4846''', '''XQ1241/8541A''' – High-quality industrial-grade:*'''XQ1241/8507''', '''XQ1241/8541''' – Industrial-grade for non-critical applications*'''XQ1250''' (6.3 V/300 mA heater), '''XQ1260''' (6.3 V/95 mA heater) – 26 mm Si-Vidicon, resolution ≥600 TV lines*'''XQ1290''' (For use with X-ray image intensifiers in medical equipment), '''XQ1291''' (broadcast-grade), '''XQ1292''' (industrial-grade), '''XQ1293''' (low-definition industrial-grade for non-critical applications), '''XQ1294''' (commercial-grade for non-critical applications), '''XQ1295''' (film scanning) – 1", {{Nowrap|9.6 mm × 12.8 mm}} ''Resistron'' S18 Vidicons, separate mesh, 95 mA heater*'''XQ1310''' – {{cvt|2⁄3|in|mm}}, {{Nowrap|6.6 mm × 8.8 mm}} S18 Vidicon*'''XQ1320''' – 32 mm, Tetrode ''EBSicon'' (Electron Bombarded [[Silicon]] Vidicon) camera tube*'''XQ1330''' (High definition), '''XQ1331''' (standard definition) – 55 mm, {{Nowrap|10.8 mm × 14.4 mm}}, S20R ''Electron Induced Conductivity'' Vidicons*'''XQ1414''' – Industrial-grade XQ1413*'''XQ1416''' – Industrial-grade XQ1415*'''XQ1451''' (Broadcast/A-grade, very low lag), '''XQ1452''' (industrial/A-grade), '''XQ1453''' (industrial/B-grade), '''XQ1456''' (Broadcast/A-grade, low lag), '''XQ1457''' (industrial/A-grade), '''XQ1458''' (industrial/B-grade) – {{cvt|2⁄3|in|mm}}, {{Nowrap|6.6 mm × 8.8 mm}} S16 (IR-sensitive) Vidicons*'''XQ1451''' (Broadcast/A-grade, very low lag), '''XQ1452''' (industrial/A-grade), '''XQ1453''' (industrial/B-grade), '''XQ1456''' (Broadcast/A-grade, low lag), '''XQ1457''' (industrial/A-grade), '''XQ1458''' (industrial/B-grade) – {{cvt|2⁄3|in|mm}}, {{Nowrap|6.6 mm × 8.8 mm}} S16 IR-sensitive Vidicons*'''XQ1460''' (For use with X-ray image intensifiers in medical equipment, very low lag), '''XQ1461''' (Broadcast/A-grade, very low lag), '''XQ1462''' (industrial/A-grade), '''XQ1463''' (industrial/B-grade), '''XQ1465''' (X-ray image intensifiers, low lag), '''XQ1466''' (Broadcast/A-grade, low lag), '''XQ1467''' (industrial/A-grade), '''XQ1468''' (industrial/B-grade) – 1", {{Nowrap|9.6 mm × 12.8 mm}} S16 (IR-sensitive) Vidicons*'''XQ1470''' (A-Grade B/W TV, very low lag), '''XQ1471''' (B-grade B/W TV, very low lag), '''XQ1472''' (A-grade B/W TV, low lag), '''XQ1473''' (B-grade B/W TV, low lag) – {{cvt|2⁄3|in|mm}}, {{Nowrap|6.6 mm × 8.8 mm}} S16 (IR-sensitive) Vidicons*'''XQ1480''', '''XQ1481''', '''XQ1483''', '''XQ1484''' – {{cvt|2⁄3|in|mm}}, {{Nowrap|6.6 mm × 8.8 mm}} Vidicons, 95 mA heater*'''XQ1590''' – {{cvt|2⁄3|in|mm}} Industrialial-grade Vidicon====='''XS'''=====*'''XS1000''' – Single-[[electron gun]] ''recording [[storage tube]]'', an [[Composite video|analog video]] [[Freeze-frame shot|frame freezer]] tube<ref name="SiemensCams">{{cite web |url=https://frank.pocnet.net/other/Siemens/Siemens_ImagePick-upTubes_ImageIntensifierTubes_SignalStorageTubes.pdf |publisher=Siemens |title=Bildaufnahmeröhren, Bildverstärkerröhren, Signalspeicherröhren (43MB) |year=1982 |language=de |access-date=24 October 2025}}]</ref>*'''XX1120''' – S20→P11 Diode-type image intensifier*'''YH1010''' – 200 W, 470 to 860 MHz Forced-air cooled Traveling-wave tube used in UHF TV transmitters*'''YH1011''' – 700 W, 470 to 600 MHz Traveling-wave tube used in UHF TV [[Broadcast relay station|transposers]]*'''YH1012''' – 250 W, 470 to 860 MHz Forced-air cooled Traveling-wave tube used in UHF TV transposers*'''YH1014''' – 800 W, 755 to 985 MHz (L band) Forced-air cooled Traveling-wave tube used in satellite ground stations/radar/[[Tropospheric scatter|troposcatter]]*'''YH1020''' – 200 W, 450 to 1000 MHz Forced-air cooled Traveling-wave tube used in UHF TV transmitters and [[Broadcast relay station|transposers]]*'''YH1040''' – 2 kW, 5.9 to 6.4 GHz (C band) Traveling-wave tube*'''YH1048''' – 1 kW, 28 to 30 GHz ([[Ka band|K<sub>a</sub>-band]]) Traveling-wave tube used in satellite radio links*'''YH1162''' – 22 W, 3.4 to 4.2 GHz (S band) Traveling-wave tube*'''YH1170''' (470 to 630 MHz), '''YH1180''' (620 to 860 MHz) – Traveling-wave ''Clystron''*'''YH1191''' – 20 W, 10.7 to 11.7 GHz (K<sub>u</sub> band) Traveling-wave tube used in satellite ground stations/radar/troposcatter*'''YH1194''' – 22 W, 12.5 to 13.2 GHz (K<sub>u</sub> band) Traveling-wave tube used in satellite ground stations/radar/troposcatter*'''YH1196''' – 16 W, 14.0 to 14.5 GHz (K<sub>u</sub> band) Traveling-wave tube used in satellite ground stations/radar/troposcatter*'''YH1201''' – 15 W Traveling-wave tube*'''YH1202''' – 11 W, 5.8 to 6.4 GHz Traveling-wave tube*'''YH1203''' – 22 W, 6.4 to 7.1 GHz Traveling-wave tube*'''YH1204''' – 11 W, 7.7 to 8.5 GHz (C band) Traveling-wave tube*'''YH1205''' – 15 W, 5.9 to 7.1 GHz Traveling-wave tube*'''YH1206''' – 11 W, 7.7 to 8.5 GHz (C band) Traveling-wave tube*'''YH1208''' – 11 W, 6.4 to 7.1 GHz Traveling-wave tube*'''YH1420''' (2.5 kW), '''YH1421''' (750 W), '''YH1422''' (300 W) – 14.0 to 14.5 GHz (K<sub>u</sub> band) Traveling-wave tube used in satellite ground stations*'''YH1502''' – 11 W, 5.8 to 6.4 GHz (C band) Traveling-wave tube*'''YH3020''' (1.3 kW, 28.7 to 30 GHz), '''YH3025''' (300 W, 27.5 to 29.5 GHz) – K<sub>a</sub>-band Traveling-wave tube used in satellite ground stations<ref>{{cite web |url=https://frank.pocnet.net/other/Siemens/twt_amplifiers_bwo_short_form_1986_198509.pdf |publisher=Siemens |title=Traveling wave amplifiers, Backward-wave oscillators short form catalogue (30MB) |year=1986 |access-date=24 October 2025}}]</ref>*'''YJ1010''', '''YJ1011''' – 225 kW<sub>peak</sub>, 8.5 to 9.6 GHz (X band) Servo-tunable, pulsed Magnetron*'''YJ1020''' (25 kW<sub>peak</sub>), '''YJ1021''' (30 kW<sub>peak</sub>) – 33 GHz ([[Ka band|K<sub>a</sub>-band]]) Pulsed Magnetron*'''YJ1030''' = '''7088''' – 120 W, 5.65 GHz (C band) Magnetron*'''YJ1040''' – 14 kW<sub>peak</sub>, 9.375 GHz Pulsed Magnetron*'''YJ1050''' – 22 kW<sub>peak</sub>, 9.24 GHz (X band) Pulsed Magnetron*'''YJ1060''' = '''6027H''' – 20 kW<sub>peak</sub>, 9.375 GHz (X band) Pulsed Magnetron*'''YJ1071''' – 10.5 kW<sub>peak</sub>, 9.41 GHz (X band) Pulsed Magnetron*'''YJ1090''' (50 W<sub>peak</sub>, 9.0 to 9.5 GHz), '''YJ1091''' (50 W<sub>peak</sub>, 8.5 to 9.0 GHz), '''YJ1100''' (180 W<sub>peak</sub>, 9.0 to 9.5 GHz), '''YJ1101''' (180 W<sub>peak</sub>, 8.5 to 9.0 GHz) – X band, Pulsed Magnetron*'''YJ1110''' (9.345 to 9.405 GHz), '''YJ1111''' (9.415 to 9.475 GHz) – 20 kW<sub>peak</sub>, X band, Pulsed Magnetron*'''YJ1120''' – 25 kW<sub>peak</sub>, 9.38 to 9.44 GHz (X band) Pulsed Magnetron*'''YJ1121''' – 26 kW<sub>peak</sub>, 9.415 to 9.475 GHz (X band) Pulsed Magnetron*'''YJ1140''' – 26 kW<sub>peak</sub>, 16.35 to 16.65 GHz (K<sub>u</sub> band) Pulsed Magnetron*'''YJ1160''', '''YJ1161''' (Water-cooled, [[ISM radio band|2.425 to 2.475 GHz]]), '''YJ1162''' (forced-air cooled, 2.425 to 2.475 GHz), '''YJ1164''' (Water-cooled, 2.325 to 2.425 GHz) – 2.5 kW, CW Magnetron used in industrial, microwave [[dielectric heating]]*'''YJ1170''' (JPS9-80C) – 45 kW<sub>peak</sub>, 8.5 to 9.3 GHz (X band), Servomotor-tuned, pulsed Magnetron*'''YJ1180''' (JPS9-200), '''YJ1181''' – 205 kW<sub>peak</sub>, 8.7 to 9.5 GHz (X band), Motor-tuned, pulsed Magnetron*'''YJ1191''' (2.425 to 2.475 GHz), '''YJ1192''' (2.325 to 2.425 GHz) – 5 kW Water-cooled, CW Magnetron used in industrial, microwave dielectric heating*'''YJ1193''', '''YJ1193E''', '''YJ1194''', '''YJ1195''', '''YJ1195E''' – 6 kW, 2.425 to 2.475 GHz Forced-air + water-cooled CW Magnetron*'''YJ1200''' (WG16 waveguide), '''YJ1201''' (WG15 waveguide) – 50 kW<sub>peak</sub>, 9.375 GHz (X band) Pulsed Magnetron*'''YJ1210''' – 250 kW<sub>peak</sub>, 8.5 to 9.6 GHz (X band) Pulsed Magnetron*'''YJ1220''' – 150 W<sub>peak</sub>, 9.375 GHz (X band) Pulsed Magnetron*'''YJ1230''' (5 MW<sub>peak</sub>), '''YJ1231''' (4 MW<sub>peak</sub>) – 1.25 to 1.35 GHz (L band) Pulsed Magnetron*'''YJ1250''' – 90 W<sub>peak</sub>, 9.345 GHz (X band) Pulsed Magnetron*'''YJ1280''' – 900 W, 2.425 to 2.475 GHz Forced-air cooled CW Magnetron*'''YJ1290''' – 65 kW<sub>peak</sub>, 9.415 to 9.475 GHz (X band) Pulsed Magnetron*'''YJ1300''' – 7 kW<sub>peak</sub>, 9.38 to 9.44 GHz (X band) Pulsed Magnetron*'''YJ1350''' = '''6344''' = Raytheon '''QK235''' – 170 kW<sub>peak</sub>, 5.45-5.825 GHz (C band) Pulsed Magnetron*'''YJ1400''' – 57 kW<sub>peak</sub>, 16.3 to 16.9 GHz (K<sub>u</sub> band) Pulsed Magnetron*'''YJ1405''' – 100 kW<sub>peak</sub>, 15.5 to 17.5 GHz (K<sub>u</sub> band) Pulsed Magnetron*'''YJ1442''' (2.425 to 2.475 GHz), '''YJ1443''' (2.350 to 2.400 GHz) – 2.8 kW CW Magnetron*'''YJ1464''', '''YJ1465''' – 100 kW<sub>peak</sub>, 8.5 to 9.6 GHz (X band) Pulsed Magnetron*'''YJ1510''', '''YJ1511''', '''YJ1530''' – 300 W, 2.450 to 2.470 GHz CW Magnetron*'''YJ1540''' – 1.26 kW, 2.445 to 2.475 GHz CW Magnetron*'''YJ1600''' – 6 kW, 2.450 to 2.470 GHz CW Magnetron*'''YK1001''' (Forced air-cooled), '''YK1002''' (forced-air + ater-cooled), '''YK1003''' (water/vapor-cooled) – 13.5 kW, 470 to 860 MHz permanent magnet-focused, 4-cavity [[Klystron]] used in TV transmitters*'''YK1100''' – 1.2 W, 7.4 to 7.7 GHz (C band) Reflex Klystron*'''DA10/550''' – 10 kV, 200 W Half-wave rectifier; triode TA10/600 without grid*'''DA10/1250''' – 10 kV, 400 W Half-wave rectifier; triode TA10/1250 without grid*'''DA10/1750''' – 10 kV, 600 W Half-wave rectifier; triode TA10/1750 without grid*'''DA10/2000''' – 10 kV, 400 W Half-wave rectifier, 16.6 V/16.5 A filament*'''DA10/2500''' – 10 kV, 750 W Half-wave rectifier; triode TA10/2500 without grid*'''DA10/5000''' – 10 kV, 1 kW Half-wave rectifier, 28 V/20 A filament*'''DA12/12000''' – 12 kV, 12 kW Water-cooled half-wave rectifier*'''DCG1/150''' – 1 kV, 150 mA Half-wave Mercury-vapor rectifier, 2 V/5 A filament, Edison screw lamp base, anode on top cap*'''DCG1/250''' – 1 kV, 250 mA Half-wave Mercury-vapor rectifier, 4 V/2.5 A filament, A4A 4-pin base, anode on top cap*'''DCG1.5/250''' – 1.5 kV, 250 mA Half-wave Mercury-vapor rectifier, 4 V/2.5 A filament, A4A 4-pin base, anode on top cap*'''DCG2/500''' – 2 kV, 250 mA Half-wave Mercury-vapor rectifier, 2 V/4.5 A filament, E27 Edison screw lamp base, anode on top cap*'''DCG2/1000''' – 2 kV, 500 mA Half-wave Mercury-vapor rectifier, 5 V/10 A filament, E40 ''Goliath'' Edison screw lamp base, anode on top cap*'''DCG2/2000''' – 2 kV, 1 A Half-wave Mercury-vapor rectifier, 5 V/10 A filament, E40 ''Goliath'' Edison screw lamp base, anode on top cap*'''DCG3/3000''' – 3 kV, 1 A Half-wave Mercury-vapor rectifier, 5 V/6.75 A filament, E40 ''Goliath'' Edison screw lamp base, anode on top cap*'''DCG4/400''' – 4 kV, 100 mA Half-wave Mercury-vapor rectifier, 2.5 V/5 A filament, Edison screw lamp base, anode on top cap*'''DCG4/1000ED''' (E27 Edison screw lamp base), '''DCG4/1000G''' (UX4 base, [[#866|{{color|Green|866A}}]]) – 4 kV, 250 mA Half-wave Mercury-vapor rectifier, 2.5 V/4.8 A filament, anode on top cap*'''DCG4/5000''' – 4 kV, 1.25 A Half-wave Mercury-vapor rectifier, 4 V/7 A filament, E40 ''Goliath'' Edison screw lamp base, anode on top cap*'''DCG5/30''', '''DCG5/30I''', '''DCG5/30II''' – 5 kV, 6 A [[Thyratron|Grid-controlled]], half-wave Mercury-vapor rectifier, half-indirect heater5 V/30 A heater connected by wires, grid pin and anode on top cap*'''DCG5/2500''' – 5 kV, 500 mA Half-wave Mercury-vapor rectifier, 5 V/10 A filament, E40 ''Goliath'' Edison screw lamp base, anode on top cap*'''DCG5/5000EG''' (E40 ''Goliath'' Edison screw lamp base), '''DCG5/5000GB''' (B4F/U4J Jumbo base, [[#872|{{color|Green|872A}}]]), '''DCG5/5000GS''' (B4D Super Jumbo base, 8008A = ZY1001) – Half-wave Mercury-vapor rectifier, 5 V/7 A filament, anode on top cap*'''DCG6/6000''' – 6 kV, 1 A Half-wave Mercury-vapor rectifier, 5 V/6.5 A filament, UX4 base, anode on top cap*'''DCG7/100''' (A4A 4-pin base), '''DCG7/100B''' (3 wires) – 7 kV, 10 A Half-wave Mercury-vapor rectifier, 5 V/20 A filament, anode on top cap*'''DCG10/15''' – 10 kV, 1.5 A Grid-controlled, half-wave Mercury-vapor rectifier consisting of three hollow glass spheres interconnected by [[stainless steel]] tubes which are used as aux anodes, 5 V/20 A filament*'''JP9-01''' – 8 W, 9.345 to 9.405 GHz CW Magnetron*'''JP9-18''' – 21 kW<sub>peak</sub>, 9.41 GHz Pulsed Magnetron*'''JP35-30''' – 40 kW<sub>peak</sub>, 34.86 GHz Pulsed Magnetron*'''JPT8-01''' (8.6 to 9.15 GHz), '''JPT8-01B''' (8.0 to 8.6 GHz) – 5 W Forced-air cooled, mechanically tunable Magnetron*'''JPG8-02B''' – 30 W, 8.75 GHz Forced-air cooled, mechanically tunable Magnetron*'''JPG9-02''' (18 W, 9.15 to 9.60 GHz), '''JPG9-02B''' (30 W, 9.24 GHz) – Forced-air cooled, mechanically tunable Magnetron*'''JPT9-01K''' – 15 W, 9.32 to 9.5 GHz Forced-air cooled, mechanically tunable Magnetron*'''GD83M''' – 83 to 84.5 V, 3.5 to 6 mA Voltage-regulator tube, Miniature 7-pin base*'''GD85M/R''', '''GD85M/S''', '''GD85P/RS''' – 83 to 87 V, 1 to 10 mA Voltage-regulator tube, Miniature 7-pin base*'''GD85WR''' – 84 to 88 V, 0.5 to 5 mA Subminiature voltage-regulator tube, all-glass round cross-section envelope, B8D/F circular 8-pin/wire-ends base*'''GD86W/S''' – 84.5 to 87.5 V, 50 to 1000 µA Subminiature voltage-regulator tube, all-glass 2-wire-ends*'''GD87M''' – 82 to 92 V, 1.5 to 3.5 mA Voltage-regulator tube, Miniature 7-pin base*'''GTR83W''' (50 to 250 µA), '''GTR83X''' (0.5 to 2.5 mA) – 82 to 86 V Subminiature voltage-regulator tube with a priming anode, all-glass 3 wire-ends*'''GTR120A/S''' – 115 to 135 V, 10 to 75 mA Voltage-regulator tube with a priming anode, A4A European 4-pin base*'''GTR150M/S''' – 145 to 160 V, 2 to 20 mA Voltage-regulator tube with a priming anode, Miniature 7-pin base*'''GTR150W''' – 145 to 150 V, 0.5 to 2 mA Voltage-regulator tube with a priming anode, all-glass 3 wire-ends*'''QS1212''' – 83 to 87 V, 1 to 10 mA Voltage-regulator tube, Miniature 7-pin base*'''QS1215''' – 86 to 92 V, 1 to 40 mA Voltage-regulator tube, Miniature 7-pin base*'''5W4''', '''5W4-GT''' – 1.4 kV, 100 mA Full-wave rectifier, 1.5 A filament, 5-pin Octal base*'''7962''' (Low (26.5-100 V) anode voltage, 6.3 V/235 mA heater, μ = 22), '''7963''' (6.3 V/235 mA heater, μ = 40) – Subminiature, ruggedized 400 MHz dual frame-grid triode, all-glass round cross-section envelope, circular 8-pin/wire-ends<ref>[https://frank.pocnet.net/other/Sylvania/Sylvania-SSFGT.pdf Sylvania Subminiature Strap-Frame-Grid tubes]</ref>*'''1665''' – Modified 2050 tetrode thyratron<ref name="Industro">[https://frank.pocnet.net/other/Industro/Industro_TubesForIndustry.pdf Industro - Special Purpose Tubes For Industry]</ref>*'''3180''', '''3184''' – Neon-filled bar graph indicator, a glass tube with a short anode, a keep-alive/primer anode and a long wire cathode that glows partially, the glow length is proportional to the tube current; similar to [[#OET|{{color|Green|GEC TuneOn}}]], ИН-9*'''S130''' – 130 V Gas-filled [[voltage-regulator tube]] for use in ''[[battery eliminator]]s''*'''4F15R''' = '''4X150A/7034''' = '''QEL1/150''' – 250 W, 150 MHz Forced-air cooled beam power tetrode, 6.0 V/2.6 A heater*'''4F16''' = '''7844''' (Contact/conduction-cooled), '''4F16R''' = '''[[#6816|{{color|Green|6816}}]]''' (forced-air cooled) – 115 W, 400 MHz Beam power tetrode, 6.3 V/2.1 A heater*'''4F84''' = '''7843''', '''4F84R''' = '''6884''' – 4F16, 4F16R with a 26.5 V/520 mA heater*'''5F25R''' = '''4CX250F/7204''' – 5F20RA with a 26.5 V/580 mA heater*'''5T23''' = '''5867''' = '''TB3/750''' – 350 W, 100 MHz Radiation-cooled power triode, 5 V/14.1 A filament*'''5T68''' = '''5868''' = '''TB4/1250''' – 450 W, 100 MHz Radiation-cooled power triode, 10 V/9.9 A filament*'''6T40''' = '''8078''' = '''TB4/1500''' – 7 kV, 500 W, 50 MHz Radiation-cooled power triode, 5 V/32.5 A filament, 4-pin base with anode on top cap*'''6T50''' = '''7092''' = '''TB5/2500''' – 7 kV, 800 W, 50 MHz Radiation-cooled power triode, 6.3 V/32.5 A filament, 4-pin base with anode on top cap*'''7F13R''' = '''7213''' – 1.5 kW, 1.215 GHz Forced-air cooled, ceramic/metal, coaxial beam power tetrodes, 5.5-6 V/7.3 A heater*'''8F66RA''' = '''[[#6166A/7007|{{color|Green|6166A/7007}}]]''' – 12 kW, 30 MHz Forced-air cooled beam power tetrode, 5 V/168 A heater*'''1201A''' = '''7E5''' – Medium-μ RF triode, 6.3 V/150 mA heater
*'''1203A''' = '''7C4''' – Detector diode, 6.3 V/150 mA heater
*'''1204''' = '''7AB7''' – Sharp-cutoff RF pentode, 6.3 V/150 mA heater, Loctal base*'''1206''' = '''7G8''' – Dual sharp-cutoff tetrode, 6.3 V/300 mA heater, Loctal base*'''1207''' – Diode + UHF triode, 6.3 V/300 mA heater, Loctal base, used as mixer*'''1216''' – Dual triode, 6.3 V/300 mA heater, Miniature 7-pin base*'''1217''' – Sharp-cutoff switching heptode used in high speed digital computer equipment, 6.3 V/300 mA heater, Miniature 7-pin base*'''1218A''' = '''8334''' – Ruggedized UHF triode used in grounded-grid amplifiers, 6.3 V/225 mA heater, Miniature 7-pin base*'''1221''' (U6A base), '''1223''' (7-pin Octal base) – Low-microphonics 6C6 pentode*'''1222''' – AF Beam power tetrode, 6.3 V/900 mA heater, Octal base; similar to 6L6-GA*'''1225''' (''6L7'') – Remote-cutoff heptode pentagrid converter with American grid topology, 6.3 V/300 mA heater, Octal base*'''1229''' – Electrometer tetrode, 900 mV/35 mA filament, UX4 base, control grid on top cap*'''1230''' – Electrometer triode, 2 V/60 mA filament, UX4 base*'''1231''' – Sharp-cutoff pentode, 6.3 V/450 mA heater, Loctal base, used as video amplifier*'''1232''' = '''7G7''' – Dual-control, sharp-cutoff pentode, 6.3 V/450 mA heater, Loctal base*'''1236A''', '''1236C''' – Thermally-limited emission diode, 1.9 V/450 mA filament, Loctal base, usable as a heating current-controlled, variable series resistor in voltage/current stabilizer circuits*'''1237''' – Gas-filled, full-wave rectifier, 2.5 V/3 A filament, Octal base*'''1238''' – Dual low (28-100 V) anode voltage AF beam power pentode, 28 V/400 mA heater, Loctal base*'''1247''' – Subminiature detector diode for use in probes, 700 mV/65 mA heater, anode on top wire*'''1252''' = '''6U8A''' – VHF Triode/pentode oscillator/mixer, 6.3 V/450 mA heater, Noval base*'''1257''' – Hydrogen-filled triode thyratron, 6.3 V/23 A heater, cable connections*'''1258''' – Hydrogen-filled triode thyratron, 6.3 V/1.8 A heater, Miniature 7-pin base*'''1264''' – Subminiature dual triode, B8E base*'''1265''' (135 V), '''1266''' (70 V) – Voltage-regulator, 6-pin Octal base; similar to 0B3*'''1267''' – Cold cathode thyratron, 7-pin Octal base; similar to 0A4-G*'''1273''' – Low-microphonics 7C7 sharp-cutoff pentode, 6.3 V/300 mA heater, Loctal base*'''1274''' – 7Y4 Full-wave rectifier with an Octal base and a 6.3 V/600 mA heater*'''1275''' – ''Directly'' AC-heated AF Power triode, 4.5 V/1.14 A filament, UX4 base; similar to 6A3*'''1276''' – 5Z3 Full-wave rectifier with a 5 V/2 A filament*'''1280''' – AF Pentode, 12.6 V/150 mA heater, Loctal base*'''1281''' – Heptode pentagrid converter, 1.4 V filament*'''1282''' – RF/IF pentode, 6.3 V/450 mA heater, Loctal base*'''1284''' – RF/IF pentode, 13 V/150 mA heater, Loctal base*'''1291''' = '''3B7''' – 1.4 W, 125 MHz Dual power triode, μ = 20, center-tapped 2.8 V/110 mA resp. 1.4 V/220 mA filament, Loctal base*'''1293''' – 120 MHz Triode, 1.4 V/110 mA filament, Loctal base*'''1294''' = '''1R4''' – Half-wave rectifier, 1.4 V/150 mA heater, Loctal base*'''1297''' = '''4B27''' – Gas-filled full-wave rectifier, 2.5 V/10 A filament, 4-pin base*'''1299''' = '''3D6/DL29''', '''1299A''' – 4.5 W, 50 MHz Beam power pentode, center-tapped 2.8 V/110 mA resp. 1.4 V/220 mA filament, Loctal base*'''ZA1006''' – Ruggedized, long-life, Neon-filled, Tritium-primed ''Touch button tube'', a cold-cathode switching diode, 72 V difference between burning and ignition voltage, used as an illuminated capacitance [[touch switch]], all-glass with 3 wire-ends*'''ZM12''' – Neon-filled, top-viewing digital indicator tube used in industrial control panels, 21 mmCH, showing a five-pronged star with a central dot*'''ZM1011''' – ZM1010 without a decimal point*'''ZM1013''' – <span style="background: black;font: Arial;color: #FF4000"> ''0 1 2 3 4 5 6'' </span> Neon-filled, side-viewing digital indicator tube, 14mmCH*'''ZM1014''' – <span style="background: black;font: Arial;color: #FF4000"> ''1 2 3 4 5 6'' </span> Neon-filled, side-viewing digital indicator tube, 14mmCH*'''ZM1028''' – <span style="background: black;font: Arial;color: #FF4000"> ''[[∢|{{color|#FF4000|∢}}]] % + -'' </span> Neon-filled, top-viewing digital indicator tube, 15.5mmCH*'''ZM1570''' – {{cvt|150|nCi|kBq|lk=on}} of [[Isotopes of promethium|<sup>147</sup>Promethium]] ([[half-life]]: 2.6234 years) primed ZM1550*'''ZM1571''' – 150 nCi of <sup>147</sup>Promethium primed ZM1551*'''3500''' – Early ''glow modulator'' used in [[John Logie Baird|Baird]]-system [[mechanical television]] receivers – a [[Neon lamp]] whose brightness is proportional to the tube current<ref>{{cite web |url=https://frank.pocnet.net/other/Philips/Philips_3500.jpg |title=Lampe pour reception de television "Philips", type 3500 |language=fr |publisher=[[Philips]] |date=5 April 1932 |access-date=21 June 2025}}</ref>*'''TH5800''' (High-temperature), '''TH5801''' (low-temperature) – 80 W Caesium plasma [[thermionic converter]]s, [[Energy conversion efficiency|η]] = 15%<ref>{{cite web |url=https://frank.pocnet.net/other/CFTH/1247-3-65.pdf |title=Electron Tubes |pages=27f. |publisher=[[Compagnie Française Thomson-Houston]] |access-date=21 June 2025}}</ref>*'''SR2A''' (88 V), '''SR2B''' (Tritium-primed), '''SR3A''' (105 V) – 2...80 mA Dual-anode voltage-regulator tube, Noval base*'''SR4''' – 85 V, 0.5...5 mA Subminiature voltage-regulator tube, all-glass with 2 wire-ends*'''SR5''' – 85 V, 1...10 mA Dual-anode voltage-regulator tube, Miniature 7-pin base*'''SR6''' (84 V), '''SR7''' (104 V) – 0.5...5 mA Subminiature voltage-regulator tube, all-glass with 2 opposite wire-ends*'''SR41''' (85 V, 50...250 µA), '''SR42''' (84 V, 0.5...2.5 mA), '''SR43''' (135 V, 0.5...2 mA) – Voltage-regulator tube with a starter anode, all-glass with 3 wire-ends*'''SR44''' = '''ZZ1000''' = '''8228''' (85 V, 0.5...5 mA), '''SR45''' (105 V, 1...5 mA) – Subminiature voltage-regulator tube, all-glass with 2 wire-ends*'''SR51''' = '''0C2''' (78 V, 5...30 mA), '''SR52''' (83 V, 3.5...6 mA), '''SR53''' = '''85A2''' = '''0G3''' (85 V, 1...10 mA), '''SR54''' = '''5651''' (87 V, 1.5...3.5 mA), '''SR55''' = '''108C1''' = '''0B2''' (108 V, 5...30 mA), '''SR56''' = '''150C2''' = '''0A2''' (153 V, 5...30 mA), '''SR57''' (150 V, 5...15 mA) – Voltage-regulator tube, Miniature 7-pin base*'''SR53''' = '''85A2''' = '''0G3''' – 85 V, 1...10 mA Voltage-regulator tube, Miniature 7-pin base*'''SR125''' – 135 V, 100...500 µA Subminiature voltage-regulator tube, all-glass with 2 wire-ends===Burroughs tubes=======Neon-filled [[Nixie tube|cold-cathode digital indicator tubes]]====[[Burroughs Corporation|Burroughs]] was the original holder of the now-generic trademark ''Nixie'', coined after purchasing the original manufacturer, ''{{Tooltip|Haydu Brothers|George and Zoltan Haydu, Plainfield, NJ, USA}} Laboratories''Also made by National Electronics, who used the prefix '''NL''' instead of '''B'''*'''B4021''' = '''8502''' (Low-voltage, round envelope cross-section), '''BD200S''' = '''7009''' (regular), '''B4032''' = '''7977''' (long-life), '''B4081''' (wide-angle), '''B4998''' (rectangular/stackable) – {{Nowrap|1=<span style="background: black;font: Arial;color: #FF4000"> ''0 1 2 3 4 5 6 7 8 9'' </span>}} Top-viewing, {{cvt|5⁄16|in|mm|1}} character height; similar to ZM1122*'''B4022''' (BD255, Regular), '''B4026''' (low-voltage), '''B4031''' (long-life) – {{Nowrap|1=<span style="background: black;font: Arial;color: #FF4000"> ''+ -'' </span>}} Top-viewing, {{cvt|5⁄16|in|mm|1}} character height*'''B5016''' (BD214, Regular), '''B5032''' (long-life), '''B5992''', '''B50911''' – {{Nowrap|1=<span style="background: black;font: Arial;color: #FF4000"> ''+ -'' </span>}} Top-viewing, {{cvt|0.61|in|mm|1}} character height*'''B5018''' (BD216), '''B50322''' – <span style="background: black;font: Arial;color: #FF4000"> ''A B C D E F G H J K'' </span> Top-viewing, {{cvt|0.61|in|mm|1}} character height*'''B5025''' = '''8651''' (10000h lifespan, no Mercury), '''B5030''' = '''8652''' (200000h lifespan), '''BD310''' – {{Nowrap|1=<span style="background: black;font: Arial;color: #FF4000"> ''0 1 2 3 4 5 6 7 8 9'' </span>}} Side-viewing, {{cvt|0.61|in|mm|1}} character height, 5 dual cathodes and separate odd/even anode compartments for [[Multiplexed display|biquinary multiplexing]]*'''B5031''' = '''8037''' (Long-life), '''HB106''' = '''6844''', '''BD302''' = '''6844A''' (regular), '''B5092''' = '''8421''' (long-life, wide viewing angle), '''B5961''' (no Mercury, rectangular), '''B5991''' = '''8422''' (rectangular), '''B59956''' (rectangular with left decimal point) – {{Nowrap|1=<span style="background: black;font: Arial;color: #FF4000"> ''0 1 2 3 4 5 6 7 8 9'' </span>}} Top-viewing, {{cvt|0.61|in|mm|1}} character height*'''B5035''', '''B50113''' (BD221) – <span style="background: black;font: Arial;color: #FF4000"> ''L M N P R S T U V W X'' </span> Top-viewing, {{cvt|0.61|in|mm|1}} character height*'''B5093''' – <span style="background: black;font: Arial;color: #FF4000"> ''+ - B C D G I O Q S'' </span> Top-viewing, {{cvt|0.61|in|mm|1}} character height*'''B5094''' – <span style="background: black;font: Arial;color: #FF4000"> ''[[Metric prefix|{{color|#FF4000|M µ N}}]]'' </span> and <span style="background: black;font: Arial;color: #FF4000"> ''A S V'' </span> Top-viewing dual, common-anode, {{cvt|0.275|in|mm|1}} character height, used in digital multimeters*'''B5440''', '''B5441''' (With both left and right decimal points), '''B5445''' (upside-down, no decimal points) – {{Nowrap|1=<span style="background: black;font: Arial;color: #FF4000"> ''0 1 2 3 4 5 6 7 8 9'' </span>}} Side-viewing, {{cvt|0.61|in|mm|1}} character height; "A" variants have the [[evacuation tip]] at bottom instead of top*'''B5442''' – <span style="background: black;font: Arial;color: #FF4000"> ''+ -'' </span> Side-viewing, {{cvt|0.61|in|mm|1}} character height*'''B5448''' – <span style="background: black;font: Arial;color: #FF4000"> ''+ -{{Tooltip| <sup>O</sup><sub>L</sub> |"OverLoad"}}''</span> Side-viewing, {{cvt|0.61|in|mm|1}} character height*'''B5560''' – <span style="background: black;font: Arial;color: #FF4000"> ''0 1 2 3 4 5 6 7 8 9'' </span> Upside-down side-viewing, {{cvt|1⁄2|in|mm|1}} character height*'''B5750''', '''B5750S''' (Shorter leads) – {{Nowrap|1=<span style="background: black;font: Arial;color: #FF4000"> ''0 1 2 3 4 5 6 7 8 9'' </span>}} Side-viewing, {{cvt|1⁄2|in|mm|1}} character height, both left and right decimal points, low-pressure, low-cost*'''B5853ST''', '''B5855ST''' (Lower base/pin straightener) – {{Nowrap|1=<span style="background: black;font: Arial;color: #FF4000"> ''0 1 2 3 4 5 6 7 8 9'' </span>}} Side-viewing, {{cvt|1⁄2|in|mm|1}} character height, both left and right decimal points, low-cost*'''B5856ST''' – <span style="background: black;font: Arial;color: #FF4000"> ''+ -'' </span> Side-viewing, {{cvt|1⁄2|in|mm|1}} character height, low-cost*'''B5859''', '''B5859S''' (Shorter leads) – {{Nowrap|1=<span style="background: black;font: Arial;color: #FF4000"> ''0 1 2 3 4 5 6 7 8 9'' </span>}} Side-viewing, {{cvt|1⁄2|in|mm|1}} character height, both left and right decimal points*'''B5971''' – Top-viewing, [[Fourteen-segment display|14-segment display]] tube, {{cvt|5⁄8|in|mm|1}} character height*'''B6012''' (BD225, Regular), '''B6034''' (long-life) – {{Nowrap|1=<span style="background: black;font: Arial;color: #FF4000"> ''+ -'' </span>}} Top-viewing, {{cvt|0.808|in|mm|1}} character height*'''B6033''' (Long-life), '''BD206''' = '''7153''' (regular), '''B6091''' = '''8423''' (long-life, wide viewing angle) – {{Nowrap|1=<span style="background: black;font: Arial;color: #FF4000"> ''0 1 2 3 4 5 6 7 8 9'' </span>}} Top-viewing, {{cvt|0.808|in|mm|1}} character height*'''B7037''' (Regular), '''B7038''' (upside-down), '''B7094''' (long-life, wide viewing angle) – <span style="background: black;font: Arial;color: #FF4000"> ''0 1 2 3 4 5 6 7 8 9'' </span> Side-viewing, {{cvt|2|in|mm|1}} character height*'''B7971''' – Side-viewing, 14-segment + cursor display tube, {{cvt|2+1⁄2|in|mm|1}} character height*'''B8091''' – <span style="background: black;font: Arial;color: #FF4000"> ''0 1 2 3 4 5 6 7 8 9'' </span> Long-life, wide-angle top-viewing, {{cvt|1+3⁄8|in|mm|1}} character height*'''B8971''' – Side-viewing, 14-segment + cursor display tube, {{cvt|1+7⁄16|in|mm|1}} character height*'''B9012''', '''HB105''' – ''Pixie'' Gas-filled digital indicator tube with a [[Dekatron]]-type readout; similar to Z565M and ETL GR10A*'''BR09250M''' – ''Panaplex-2'' Multiplexed 9-digit, 7-segment display tube, {{cvt|0.2|in|mm|1}} character height, right decimal point*'''BR16400''' – ''Panaplex'' Multiplexed 16-digit, 9-segment (incl. <span style="background: black;font: Arial;color: #FF4000"> ''+'' </span> and decimal point) display tube, {{cvt|0.4|in|mm|1}} character height, [[Krypton-85|<sup>85</sup>Kr]] ([[half-life]]: 10.756 years) keep-alive====[[Trochotron]]s====*'''BD301''' = '''6703''' – 500 ns Decade counter ''Magnetron Beam Switching Tube'', 6.3 V/300 mA heater*'''BD401''' = '''6702''' (200-400 MHz), '''BX1203''' = '''6713''' (0.15-30 MHz) – ''Beam-X Switch'' modified for use as a [[Noise generator|noise source]] by removing all but the last two spade and grid pairs, thus introducing asymmetries of the already undulated electric field inside, using the principle of random noise generation in a Magnetron-like device operated near cut-off, 6.3 V heater*'''BX1000''' = '''6710''', '''BX2000''' = '''6711''', '''BX3000''' = '''6712''' (High current), '''BX4000''' = '''6714''' (low-voltage) – 2 MHz Decade counter ''Beam-X Switch'', 6.3 V/150 mA heater*'''HB101''' = '''6701''' – Low-voltage 500 ns decade counter ''Magnetron Beam Switching Tube'', 6.3 V/300 mA heater*'''MO10''' = '''6700/ET51''' – 200 ns Decade counter ''Magnetron Beam Switching Tube'', 6.3 V/300 mA heater*'''MO10R''' = '''6704''' – 100 ns Decade counter ''Magnetron Beam Switching Tube'' with internal spade load resistors, 6.3 V/300 mA heater*'''7227''' – 2 W Avionics power pentode, 22-29 V/175 mA heater, Noval base*'''6С53Н''' ⟼ '''6S53N''' – Miniature, ceramic/metal, [[Cermet#Ceramic-to-metal joints and seals|disk-seal]] planar UHF triode; similar to EC1010*'''52CG''' – Gas-filled, head-on, S1 phototube, A4A European 4-pin base*'''55CG''' – Gas-filled, head-on, S1 phototube, B3A 3-pin ''PeeWee'' base*'''ASX5510''' – Remote-cutoff tetrode, 2.5 V/1.7 A heater, UY5 base with anode on top pin; derived from type 35/51*'''6569''' – 250 W, 60 MHz Linear power triode used in grounded-grid amplifiers, 5 V/14.5 A filament, B5E ''Giant 5-pin'' UY base with anode on top cap<ref name="PentaLabs1965">{{cite web |url=https://frank.pocnet.net/other/PentaLabs/PentaLabs_PowerTubesAndAccessories_1965.pdf |title=PentaLabs power tubes and accessories (69MB) |publisher=Penta Laboratories |access-date=10 February 2025}}</ref>*'''8545''' (Water/vapor-cooled), '''8546''' (Water-cooled) – 150 kW, 50 MHz Ceramic/metal power tetrodes, 12 V/400 A filament<ref name="MachlettET">{{cite web |url=https://frank.pocnet.net/other/Machlett/Machlett_ElectronTubes.pdf |title=Machlett electron tubes (18MB) |publisher=[[Machlett Laboratories]] |access-date=9 February 2025}}</ref>*'''8585''', '''8586''' (Grounded cathode) – S25→P20 Image intensifier<ref name="MachlettET" />*'''8598''' – [[#EIA_SpecResp|{{color|Green|S1}}]]→[[Phosphor|P20]] Infrared image converter*'''8629''', '''8631''' – 100 W, 6 GHz Ceramic/metal disk-seal planar pulse-rated UHF triode, ''Phormat''<ref name="Phormat" /> cathode;<ref name="MachlettET" /> miniaturized 6442*'''8630''' – 100 W, 7 GHz Ceramic/metal disk-seal planar pulse-rated UHF triode;<ref name="MachlettET" /> miniaturized 6771*'''8788''' – S25→P20 Image intensifier, grounded anode<ref name="MachlettET" />*'''CK502AX''', '''CK503AX''' – Subminiature AF power pentode used in hearing aids, U<sub>Amax</sub> = 45 V, 1.25 V/30 mA filament, all-glass elliptical cross-section envelope with 5 inline wire-ends*'''CK505AX''' – Subminiature AF pentode for use in wearable or portable instruments, U<sub>Amax</sub> = 30 V, 625 mV/30 mA filament, all-glass elliptical cross-section envelope with 5 inline wire-ends*'''CK506AX''', '''CK507AX''' – Subminiature AF power pentode used in hearing aids, U<sub>Amax</sub> = 45 V, 1.25 V/50 mA filament, all-glass elliptical cross-section envelope with 5 inline wire-ends*'''CK509AX''' – Subminiature AF triode for use in wearable or portable instruments, U<sub>Amax</sub> = 45 V, 625 mV/30 mA filament, all-glass elliptical cross-section envelope with 4 inline wire-ends*'''CK510AX''' – Subminiature, dual tetrode with a space charge grid, U<sub>Amax</sub> = 45 V, 625 mV/50 mA filament, all-glass elliptical cross-section envelope with 7 inline wire-ends*'''CK512AX''' – Subminiature AF pentode for use in wearable or portable instruments, U<sub>Amax</sub> = 25 V, 625 mV/20 mA filament, all-glass elliptical cross-section envelope with 5 inline wire-ends*'''CK526AX''' – Subminiature AF power pentode for use in wearable or portable equipment, U<sub>Amax</sub> = 45 V, 1.25 V/20 mA filament, all-glass elliptical cross-section envelope with 5 inline wire-ends*'''CK532DX''' = '''DL650''' – Subminiature power pentode, U<sub>Amax</sub> = 30 V, 1.25 V/15 mA filament, all-glass elliptical cross-section envelope with 5 inline wire-ends*'''CK533AX''' – Subminiature AF power pentode for use in wearable or portable equipment, U<sub>Amax</sub> = 45 V, 1.25 V/15 mA filament, all-glass elliptical cross-section envelope with 5 inline wire-ends*'''CK534AX''' – Subminiature AF pentode for use in wearable or portable equipment, U<sub>Amax</sub> = 30 V, 625 mV/15 mA filament, all-glass elliptical cross-section envelope with 5 inline wire-ends*'''CK538DX''' = '''DF650''' – Subminiature AF pentode used in hearing aids, 625 mV/15 mA filament, all-glass elliptical cross-section envelope with 5 inline wire-ends*'''CK542DX''' – Subminiature AF power pentode for use in wearable or portable equipment, U<sub>Amax</sub> = 30 V, 1.25 V/15 mA filament, all-glass elliptical cross-section envelope with 5 inline wire-ends*'''CK546DX''' = '''DL651''' – CK532DX with a 1.25 V/10 mA filament*'''CK547DX''' – Subminiature AF power pentode for use in wearable or portable equipment, U<sub>Amax</sub> = 45 V, 1.25 V/10 mA filament, all-glass elliptical cross-section envelope with 5 inline wire-ends*'''CK549DX''' = '''DF651''' – CK538DX with a 625 mV/10 mA filament*'''CK1003''' = '''0Z4A''' – See [[#RETMA0rec|{{color|Green|RETMA 0 prefix rectifiers}}]]*'''CK1005''' = '''QMG159''' – 450 V, 30 ≤ I ≤ 70 mA Gas-filled, full-wave rectifier, 6.3 V/50 mA filament - maintaining the filament powered after startup is optional because ionic cathode heating is sufficient, Octal base, used in vibrator power supplies in early car radios*'''CK1006''' – 1.6 kV, 70 ≤ I ≤ 200 mA Gas-filled, full-wave rectifier, 1.75 V/2 A filament, UX4 base*'''CK1007''' – 1.2 kV, 30 ≤ I ≤ 110 mA Gas-filled, full-wave rectifier, 1 V/1.2 A filament, 5-pin Octal base*'''CK1018''', '''CK1019''', '''CK1020''', '''CK1021''', '''CK1023''' – β and γ-detecting, self-quenched Geiger-Müller tube used in [[geological survey]] instruments and in [[Prospecting|prospector]]'s equipment*'''CK1024''' – 1 kV, 50 ≤ I ≤ 175 mA Gas-filled, full-wave rectifier, 5-pin Octal base*'''CK1026''' – γ-detecting, Halogen-quenched Geiger-Müller tube used in prospector's equipment*'''CK1030''', '''CK1031''', '''CK1032''' – Spark gaps*'''CK1047''' – 1.2 kV/12 mA Half-wave, gas-filled, cold-cathode rectifier, Miniature 7-pin base with anode on top cap*'''CK1049''' – β and γ-detecting, self-quenched Geiger-Müller tube*'''CK1050A''' – 118 V, 3 mA Subminiature Neon-filled triode used as a [[Flip-flop (electronics)|latching]] indicator, 1.25 V/250 mA filament, all-glass with 4 wire-ends; superseded by 7323*'''CK1054''' – Subminiature, gas-filled triode thyratron designed specifically to operate like a vacuum triode below its ignition voltage, 1.4 V/50 mA filament, see RK61*'''CK1055''' – 150 V/75...300 µA Subminiature voltage-regulator tube, all-glass wire-ended*'''CK1057''' – 72 V, 2 mA Subminiature, cold-cathode gas triode with a keep-alive, all-glass with 4 wire-ends*'''CK1519''', '''CK1521''' – Recording storage tubes*'''QK172''' = '''6959''', '''QK235''' = '''6344''', '''QK254''' = '''6518''', '''QK264''' = '''7528''', '''QK338''' = '''6410''', '''QK358''' = '''6517''', '''QK428''' = '''6406''', '''QK456''', '''QK470''' = '''7484''', '''QK665''', '''QK666''', '''QK702''' = '''7630''', '''QKH713''' = '''7256''', '''QK735''' – Magnetrons<ref name="Raytheon1963">{{cite web |url=https://frank.pocnet.net/other/Raytheon/Raytheon_MicrowaveAndPowerTubes_1963.pdf |title=Microwave and Power Tubes Technical Data |publisher=[[Raytheon|Raytheon Company]] |year=1963 |access-date=26 February 2025}}</ref>*'''QK289''', '''QK290''', '''QK291''', '''QK292''', '''QK293''', '''QK294''', '''QK295''', '''QK296''', '''QK297''', '''QK306''', '''QK386''', '''QK417''' = '''RK6310''' = '''6310''', '''QK420''', '''QK422''', '''QK436''', '''QK483''' = '''6573''', '''QK673''' – (Reflex-)Klystrons*'''QK411A''' = '''7570''', '''QK464A''' = '''6835''', '''QK685''' = '''7571''', '''QK703''' = '''7572''', '''QK787''' = '''7575''' – Recording storage tubes*'''QK518''', '''QK528''', '''QK610''', '''QK625''', '''QK634''', '''QKB691''' = '''7783''' – [[Backward-wave oscillator]]s*'''QK542''', '''QKW574''', '''QKW575''', '''QKW669''', '''QKW746''', '''QKW750A''', ''QKW825''', '''QKW928''', '''QKW998''', '''QKW1013''' – [[Traveling-wave tube]]s*'''QKS576''', '''QK630''', '''QK653''' = '''7577''' – [[Crossed-field amplifier|Amplitrons/Stabilotrons]]*'''QK748''' (Top window optionally made of [[Sapphire]] (λ%lt;sub>cutoff</sub>=6 µm) or of Silicon (full range)), '''QKN748''', '''QKN884''' (Silicon window), '''QK902''', '''QK1003''', '''QK1004''' ({{chem2|BaF2|link=Barium fluoride}} window (full range)) – [[Extrinsic semiconductor#P-type semiconductors|p-type]] Gold-[[Doping (semiconductor)|doped]] Germanium 2...9 µm infrared photoresistors for use in a [[liquid Nitrogen]] [[Cryogenic storage dewar|dewar]]<ref name="Raytheon1963" />*'''RK10''' – 12 W, 60 MHz Power triode, μ = 8, 7.5 V/1.25 A filament, [[Dielectric loss|low loss]] ''[[Steatite|Isolantite]]'' UX4 Bayonet base for improved RF performance;<ref name="Raytheon1938Amateur">{{cite web |url=https://frank.pocnet.net/sheets/081/suppinfo/Raytheon_1938_Handbook_of_Amateur_Tube_Uses.pdf |title=Handbook of Amateur Tube Uses |year=1938 |publisher=[[Raytheon|Raytheon Company]] |access-date=27 February 2025}}</ref> derived from type 10*'''RK11''' (μ = 20; 1623), '''RK12''' (μ = 80) – 25 W, 60 MHz Power triode, 6.3 V/3 A filament, ''Isolantite'' UX4 Bayonet base with anode on top cap*'''RK18''' – 40 W, 60 MHz Power triode, Molybdenum anode, 7.5 V/3 A filament, ''Isolantite'' UX4 Bayonet base with anode on top cap*'''RK19''' (Full-wave, 7.5 V/2.5 A heater), '''RK21''' (half-wave, 2.5 V/4 A heater), '''RK22''' = '''3B23''' (full-wave, 2.5 V/8 A heater) – 3.5 kV, 200 mA Rectifier, UX4 Bayonet base with anode(s) on top cap(s)*'''RK20A''' – 40 W, 30 MHz Power pentode, Molybdenum anode, 7.5 V/3.25 A filament, hard glass envelope, ''Isolantite'' UY5 base with anode on top cap*'''RK23''' (2.5 V/2 A heater, ''Isolantite'' base), '''RK25''' (6.3 V/900 mA heater, ''Isolantite'' base; 802), '''RK25B''' (Bakelite base), – 10 W, 30 MHz Power pentode, U7B base with anode on top cap*'''RK24''' – 1.5 W, 112 MHz Power triode, μ = 8, 2 V/120 mA filament, ''Isolantite'' UX4 Bayonet base; replaces type 30*'''RK28''' – 100 W, 30 MHz Power pentode, Molybdenum anode, 10 V/5 A filament, hard glass envelope, ''Isolantite'' B5D/U5G ''Giant 5-pin'' UY base with anode on top cap*'''RK30''' (800) – 35 W, 60 MHz Power triode, Molybdenum anode, 7.5 V/3.25 A filament, ''Isolantite'' UX4 Bayonet base with anode and control grid on top caps*'''RK31''' – 40 W, 30 MHz Power triode, Molybdenum anode, 7.5 V/3 A filament, ''Isolantite'' UX4 Bayonet base with anode on top cap*'''RK32''' = '''304B''' = '''834''' – 50 W, 150 MHz Power triode, Molybdenum anode, 7.5 V/3.25 A filament, ''Isolantite'' UX4 Bayonet base with anode and control grid on top caps*'''RK33''' (1642, 2C21) – 2×2.5 W, 60 MHz Separate cathodes dual power triode, μ = 10.5, 6.3 V/600 mA heater, ''Isolantite'' U7A base with one control grid on top cap*'''RK34''' = '''2C34''' – 2×5 W, 240 MHz Separate cathodes dual power triode, μ = 13, 6.3 V/800 mA heater, ''Isolantite'' U7A base with both control grids on top caps*'''RK35''', '''RK37''' – 50 W, 60 MHz Power triode, Tantalum grid and anode, 7.5 V/4 A filament, ''Isolantite'' UX4 Bayonet base with control grid on side cap and anode on top cap*'''RK36''' (μ = 4), '''RK38''' – 100 W, 60 MHz Power triode, Tantalum grid and anode, 5 V/8 A filament, ''Isolantite'' UX4 Bayonet base with control grid on top cap and anode on side cap*'''RK39''' (6.3 V/900 mA heater; 807), '''RK41''' (2.5 V/2.4 A heater) – 25 W, 60 MHz Beam power tetrode, ''Isolantite'' UY5 base with anode on top cap*'''RK42''' – 120 MHz Triode, μ = 8.2, 1.5 V/60 mA filament, UX4 base*'''RK43''' – Dual VHF power triode, μ = 13, 1.5 V/120 mA filament, U6A base*'''RK44''' (318A, 837) – 12 W, 20 MHz Power pentode, 12.6 V/700 mA heater, ''Isolantite'' U7B base with anode on top cap*'''RK45''' – 10 W, 30 MHz Power pentode, 12.6 V/450 mA heater, ''Isolantite'' U7B base with anode on top cap*'''RK46''' – 40 W, 30 MHz Power pentode, Molybdenum anode, 12.6 V/2.5 A filament, ''Isolantite'' U7B base with anode on top cap*'''RK47''' – 50 W, 30 MHz Beam power tetrode, 10 V/3.25 A filament, hard glass envelope, ''Isolantite'' UY5 base with anode on top cap*'''RK48''' – 100 W, 30 MHz Beam power tetrode, 10 V/5 A filament, hard glass envelope, ''Isolantite'' UY5 base with anode on top cap*'''RK49''' – 21 W, 15 MHz Beam power tetrode, 6.3 V/900 mA heater; 6L6-G with an ''Isolantite'' U6A base*'''RK51''' (4C22), '''RK52''' – 60 W, 60 MHz Power triode, Graphite anode, 7.5 V/3.75 A filament, hard glass envelope, ''Isolantite'' UX4 Bayonet base with anode on top cap*'''RK56''' – 8 W Beam power tetrode, 6.3 V/550 mA heater, UY5 base*'''RK57''' = '''805''' – 125 W, 30 MHz Power triode, 10 V/3.25 A filament, B4F/U4J Jumbo base with anode on top cap*'''RK59''' – Dual power triode, 6.3 V/1 A filament, UX4 base with anodes on top caps*'''RK60''' = '''1641''' – 750 V<sub>RMS</sub>, 250 mA<sub>output</sub> Full-wave rectifier, 5 V/3 A filament, UX4 base with both anodes on top caps*'''RK63''' (250TH) – Power triode, 5 V/10 A filament, B4F/U4J Jumbo base with anode on top cap*'''RK64''' – Power pentode, 6.3 V/500 mA filament, UY5 base with anode on top cap*'''RK100''' – Mercury vapor-filled power tetrode designed specifically to operate like a vacuum ''triode'' below its ignition voltage, grid #1 acts like a keep-alive for the ionizing discharge and as a virtual cathode for the amplifier section, grid #2 is the control grid, 6.3 V/900 mA heater, U6A base*'''RK1851''' = '''1851''', '''RK1852''' = '''1852/6AC7''', '''RK1853''' = '''1853/6AB7''' – See [[#1800RCA|{{color|Green|RCA 1800s}}]]*'''457A''' – 100 mW, 10.7 to 11.7 GHz [[Sutton tube|Reflex Klystron]]<ref>{{cite web |url=https://lampes-et-tubes.info/mwkl/457A-1965.pdf |publisher=[[Western Electric]] |title=457A Electron Tube |date=January 1965 |access-date=3 March 2025}} • on [https://lampes-et-tubes.info/mwkl/mw269.php?l=e Lampes-et-tubes]</ref>*'''XX1110''', '''XX1111''' – S25→P20 Image intensifier<ref name="AEG1978">{{cite web |url=https://frank.pocnet.net/other/AEG-Telefunken/AEG-Telefunken_%C3%9CbersichtR%C3%B6hrenUndBaugruppen_1978.pdf |title=Übersicht Röhren und Baugruppen |language=de |publisher=[[AEG (German company)|AEG]]-[[Telefunken]] |access-date=21 February 2025}}</ref>*'''XX1112''' – XX1111 + XX1191 2-stage image intensifier<ref name="AEG1978" />*'''XX1136''' – S25→P20 Image intensifier<ref name="DEP_II">{{cite web |url=https://frank.pocnet.net/other/DEP/DEP_ImageIntensifiers_1976.pdf |title=Image Intensifiers (33MB) |publisher=Delft Electronische Producten<sup>([[:nl:Oldelft#Leeuwarden, Roden|nl]])</sup> |date=November 1976 |access-date=18 February 2025}}</ref>*'''XX1149''' – S25→P20 Image intensifier<ref name="DEP_II" />*'''XX1220''', '''XX1221''', '''XX1227''' – S25→P20 Image intensifier<ref name="DEP_II" />*'''XX1272''', '''XX1290''' – S25→P20 Image intensifier<ref name="DEP_II" />*'''XX1306''' – 2. Gen. (=with a [[Microchannel plate detector|microchannel disc]]), S25&rarr;P20 Image intensifier*'''XX1310''', '''XX1311''', '''XX1340''' – S25→P20 Image intensifier<ref name="DEP_II" />*'''XX1350''' – XX1111 + XX1201 2-stage image intensifier<ref name="AEG1978" />*'''XX1370''' – 2. Gen., S20→P11 Gated image intensifier used as a [[Shutter (photography)|high-speed shutter]] in photography*'''XX1390''' – 2. Gen., S25→P20 Image intensifier used in [[Night-vision device|night vision goggles]]*'''YD1040''' (7815R) – 1.5 kW<sub>peak</sub>, 1.1 GHz Pulse-rated disk-seal power triode, 6 V/1 A filament<ref name="AEG1978" />*'''YD1050''' – 26 W, 500 MHz Disk-seal power triode, 6 V/1 A filament<ref name="AEG1978" />*'''YD1051''' – 30 W, 600 MHz Disk-seal power triode, 6 V/1 A filament<ref name="AEG1978" />*'''YD1052''' – 1 kW<sub>peak</sub>, 1.6 GHz Pulse-rated disk-seal power triode, 6.3 V/1 A filament<ref name="AEG1978" />*'''YD1053''' – 26 W, 500 MHz Disk-seal power triode, 6 V/1 A filament<ref name="AEG1978" />*'''YD1054''' – 26 W, 800 MHz Disk-seal power triode, 6.3 V/1 A filament<ref name="AEG1978" />*'''YD1055''' – 1.5 kW<sub>peak</sub>, 1.03 GHz Pulse-rated disk-seal power triode, 6.3 V/1 A filament<ref name="AEG1978" />*'''YH1300''' (5.9 to 6.4 GHz), '''YH1301''' (7.7 to 8.0 GHz) – 200 W C band Traveling-wave tube used in satellite ground stations/radar/troposcatter<ref name="AEG1978" />*'''YK1023''' – 120 mW, 7.6 to 8.2 GHz (C band) Reflex Klystron with thermal tuning, 6.3 V/440 mA heater, Octal base<ref name="AEG1978" />*'''YK1030''' – 1.4 W, 6.2 to 7.6 GHz (C band) Reflex Klystron<ref name="AEG1978" />*'''YK1050''' – 170 mW, 7.0 to 8.2 GHz (C band) Reflex Klystron<ref name="AEG1978" />*'''YK1080''' (9.8 to 10.5 GHz), '''YK1081''' (9.4 to 10 GHz) – 25 mW Reflex Klystron<ref name="AEG1978" />*'''YK1082''' – 125 mW, 9.3 to 9.6 GHz (X band) Reflex Klystron<ref name="AEG1978" />*'''YK1160''' = '''KS9-30''' = '''6975''' – 45 mW, 8.5 to 9.66 GHz (X band) Reflex Klystron<ref name="AEG1978" />*'''YL1510''' – 1.5 kW, 30 MHz Forced-air cooled, ceramic/metal, power tetrode, 12.6 V/3.7 A filament<ref name="AEG1978" />*'''R134''' – Power pentode, 18 V/225 mA heater, Octal base<ref name="MBLE1957">*'''R150''' – Wideband, sharp-cutoff pentode, 6.3 V/300 mA heater, Noval base<ref name="MBLE1957" />*'''R152''' – Hexode-type [[Beam deflection tube]] used as a [[Coincidence circuit|coincidence detector]], 6.3 V/300 mA heater, Noval base<ref name="MBLE1957" />*'''R263''' – Subminiature detector diode, 6.3 V/150 mA heater, all-glass round cross-section envelope, circular 4-pin/wire-ends base*'''R265''' – Subminiature, wideband, sharp-cutoff pentode, 6.3 V/175 mA heater, all-glass round cross-section envelope, circular 7-pin/wire-ends base<ref name="MBLE1957" />*'''R271''' – Subminiature pentode mixer, 6.3 V/200 mA heater, all-glass round cross-section envelope, B8D circular 8-pin/wire-ends base<ref name="MBLE1957" />*'''KN1''' – 3 kV, 500 A<sub>surge</sub> [[Krytron]], a gas-filled, cold-cathode, arc-discharge thyratron with a keep-alive electrode, used as a very high-speed, high-surge current switch, pulse duration 10 µs, max. anode delay 1 µs,<ref>Delay time for Krytrons is measured at an anode potential of 3 kV with a 500 V peak trigger and 50 µA keep-alive current (KN4 at 150 µA)</ref> max. jitter 100 ns, lifespan 10<sup>7</sup> shots, all-glass with 4 wire-ends<ref name="EGG090">{{cite web |url=https://frank.pocnet.net/other/EG&G/EG&G_Krytrons.pdf |publisher=EG&G Electro-Optics Division, Salem, Massachusetts, USA |title=Data sheet #090 ''Krytrons - Cold Cathode Trigger & Regulator Tubes'' |date=August 1967 |access-date=23 February 2025}}</ref>*'''KN3''' – 3 kV, 1.2 kA<sub>surge</sub> Krytron with a keep-alive electrode, pulse duration 15 µs, max. anode delay 800 ns, max. jitter 100 ns, lifespan 6000 shots, all-glass with 4 wire-ends*'''KN5''' – 3 kV, 1.2 kA<sub>surge</sub> Krytron with a keep-alive electrode, pulse duration 25 µs, max. anode delay 300 ns, max. jitter 50 ns, lifespan 5000 shots, all-glass with 4 wire-ends*'''KN7''' – 3 kV, 500 A<sub>surge</sub> Regulator Krytron with a keep-alive electrode, pulse duration 12 µs, max. anode delay 250 ns, max. jitter 30 ns, lifespan 10<sup>6</sup> shots, all-glass T3 with 4 wire-ends*'''KN14''' – 3 kV, 2 kA<sub>surge</sub> Krytron with a keep-alive electrode, pulse duration 10 µs, max. anode delay 200 ns, max. jitter 30 ns, all-glass with 4 wire-ends<ref name="EGG_CondensedCat">{{cite web |url=https://frank.pocnet.net/other/EG&G/EG&G_Electro-optics_CondensedCatalog.pdf |publisher=EG&G Electro-Optics Division, Salem, Massachusetts, USA |title=Electro-Optics Condensed Catalog |date=November 1979 |access-date=23 February 2025}}</ref>:*'''KN22B''' – 8 kV===={{anchor|1800RCA}}'''1800'''s====*'''1848''' – [[Iconoscope]] for use in portable TV cameras*'''1850A''' – 5.75" Iconoscope for use in [[Telecine|film/slide scanning]]*'''1851''' (Control grid on top pin, sharp-cutoff), '''1852''' = '''6AC7''' (control grid on base pin), '''1853''' = '''6AB7''' (semiremote-cutoff) – Broadband pentodes used in experimental TV equipment, 6.3 V/450 mA heater, Octal base*'''1854''' = '''6474''' – 3" [[Video camera tube#Image orthicon|''Image Orthicon'' video camera tubes]], 6.3 V/600 mA heater, ''Diheptal'' 14-pin base*'''1855''' – ''Graphechon'' tube, see [[#6896|{{color|Green|6896}}]]===={{anchor|2000RCA}}'''2000'''s====*'''2000''' = '''4B26''' – Gas-filled, half-wave rectifier*'''2020''', '''2060''', '''2061''', '''2062''', '''2063''', '''2064''', '''2065''' – 10-Stage, head-on, S11 photomultipliers*'''2039''' = '''6950''' – 150 kW, 200 MHz ''Super-Power'' water-cooled, ceramic/metal, coaxial, shielded-grid, 1.5 MW<sub>peak</sub> pulsed beam power triode, 7.3-7.8 V/1.14 kA filament*'''2048A''' – 0.62" Ruggedized Vidicon*'''2050''', '''2050A''', '''2051''' – Xenon tetrode thyratrons, Octal base*'''2053''' – 5" Display storage tube*'''2054''' – 300 kW, 440 MHz ''Super-Power'' water-cooled, ceramic/metal, coaxial, shielded-grid, 5 MW<sub>peak</sub> pulsed beam power triode, 3.6-4.5 V/6.8-7.2 kA filament*'''4401''', '''4414''' = '''7611''', '''4415''', '''4416''', '''4492''' – ''Image Orthicon'' video camera tubes*'''4438''', '''4439''', '''4440''', '''4441''', '''4441A''', '''4460''', '''4461''' (10-Stage, S11, head-on), '''4459''' (12-stage, S20), '''4463''', '''4464''', '''4465''' (10-stage, S20), '''4471''', '''4472''', '''4473''' (9-stage, S4, side-on) – Photomultipliers*'''4478''', '''4488''', '''4493''', '''4494''', '''4495''' – Vidicon video camera tubes*'''3510''' (High-vavuum, Potassium photocathode, blue/green), '''3512''' (high-vavuum, ''oxidated-Caesium''-on-''Silver'', λ<sub>max</sub>=850 nm, red-tinted, λ<sub>cutoff</sub>=600 nm), '''3530''', '''3533''', '''3534''', '''3538''', '''3541''' (gas-filled, ''oxidated-Caesium''-on-''Silver'', 850 nm), '''3545''', '''3546''', '''3554''' (gas-filled, [[#EIA_SpecResp|{{color|Green|S1 Caesium-on-oxidated-Silver}}]], 850 nm) – Early side-on phototubes*'''56CVP''' – 10-stage, head-on, S1 photomultiplier, ''Bidecal'' 20-pin base*'''60AVP''' – 12-stage, head-on, S11 photomultiplier, ''Bidecal'' 20-pin base*'''AZ920''' – Triode, μ = 9, 1 V/60 mA filament, A4A European 4-pin base*'''BW602''', '''BW704''' – Power triodes, 2 V filament, A4A European 4-pin base*'''BX604''' = Philips '''B205''' – Power triode, μ = 6, 2 V/150 mA filament, A4A European 4-pin base*'''BY1010''', '''BY1210''' (Telefunken RE062), '''BY1814''', '''BY1815''' (Philips B217), '''BY2010''' (Telefunken RE102), '''BY2020''', '''BY2043''' – Triodes, 2 V filament, A4A European 4-pin base*'''DW601''' = Philips '''E406''' – Power triode, μ = 6, 4 V/1 A filament, A4A European 4-pin base*'''DW702''' (Philips D410), '''DW1003''' (Philips E409) – Power triodes, 4 V filament, O5A European 5-pin base*'''DW1111''' = Philips '''E415''', '''DW1508''', '''DW3020''', '''DW3559''', '''DW4023''' (Philips E438) – Triodes, 4 V filament, O5A European 5-pin base*'''DX502''' = Philips '''B405''', '''DX804''' = Telefunken '''RE134''' – Power triodes, 4 V filament, A4A European 4-pin base*'''DY604''' – Power triode, μ = 6, 4 V/100 mA filament, A4A European 4-pin base*'''DZ813''', '''DZ2222''' – Triodes, 4 V filament, A4A European 4-pin base*'''GW402''' (Philips F704) – Power triode, μ = 4, 7.2 V/1.2 A filament, A4A European 4-pin base*'''6P17''' – 4.75 W, 100 MHz Power pentode, 6.3 V/200 mA heater, Miniature 7-pin base*'''20D1''' – Separate cathodes dual diode, 9.5 V/200 mA heater, Miniature 7-pin base*'''20F2''' – Sharp-cutoff RF pentode, 11 V/200 mA heater, Rimlock base*'''20L1''' – Separate cathodes dual triode, 12.6 V/200 mA heater, Rimlock base*'''20P2''' (20 W), '''20P4''' (10 W) – Beam power tetrodes, 38 V/200 mA heater, Octal base*'''11D12''' – 550 V, 2×13 W Separate cathodes dual power triode used as series-pass regulator in stabilized DC power supplies, 6.3 V/2.5 A heater, Octal base*'''11E1''' – 25 W AF Beam power tetrode, 6.3 V/1.2 A heater*'''11E13''' – 2×5 W, 225 MHz Dual power tetrode, center-tapped 12.6 V/420 mA resp. 6.3 V/830 mA heater, Noval base*'''11E15''' – 2×20 W, 500 MHz Dual power tetrode, center-tapped 12.6 V/900 mA resp. 6.3 V/1.8 A heater, B7A Septar base*'''11E16''' – 2×20 W, 600 MHz Dual power tetrode, center-tapped 12.6 V/650 mA resp. 6.3 V/1.3 A heater, B7A Septar base*'''14D12''' – 6 kV, 500 W, 60 MHz Radiation-cooled power triode, Graphite anode, μ = 22, 5 V/32.5 A thoriated Tungsten filament, 4-pin base*'''14D13''' = '''V1505''' – 3 kV, 275 W, 1.5 MHz Power triode, Graphite anode, μ = 16, 14 V/6.5 A thoriated Tungsten filament, 4-pin base*'''15D12''' – 6 kV, 800 W, 60 MHz Radiation-cooled power triode, Graphite anode, μ = 23, 6.3 V/31-34 A thoriated Tungsten filament, 4-pin base*'''15J12''' – 7 kV, 1.3 kW, 60 MHz Forced-air cooled power triode, μ = 22, 6.3 V/32.5 A thoriated Tungsten filament, 4-pin base*'''15P12''' – 7 kV, 650 W, 60 MHz Water-cooled power triode, μ = 21, 5 V/32.5 A thoriated Tungsten filament, 4-pin base*'''15V12''' – 7 kV, 1.3 kW, 60 MHz Water/vapor-cooled power triode, μ = 22, 6.3 V/32.5 A thoriated Tungsten filament*'''22M1''' – Cold-cathode, gas-filled, linear, light source (''glow modulator tube'') diode for rotating-drum [[FAX]] receivers, etc., 2-pin Octal base*'''27A12''', '''27C12''', '''27J12''' – [[Phototube]]s*'''27M1''', '''27M2''', '''27M3''', '''27M12''', '''27M12A''', '''27M13''' – [[Photomultiplier]]s*'''T11''' (Neon, 5 kHz), '''T21''' (15 kHz) – 300 mA<sub>peak</sub> Triode thyratron, 4 V/1.2 A heater, O5A European 5-pin base with anode on top cap*'''T31''' (O5A European 5-pin base with anode on top cap), '''T41''' (Octal base) – 500 mA<sub>peak</sub> Triode thyratron, 4 V/1.5 A heater*'''V339''' – Triode for use in [[Voltmeter#VTVMs and FET-VMs|vacuum tube volt meters]], μ = 73, 4 V/580 mA heater*'''V453''' – Shielded, low-noise, low-microphonics, low-hum RF pentode, 4 V/650 mA heater, MazdaOctal base with control grid on top cap*'''EHF350''' (4 kV), '''EHZ350''' (5 kV) – 500 W, 60 MHz Power triode, [[Gain (electronics)|μ]] = 13.5, 22 V/16 A filament:*'''EHZ350/1''' – 750 W EHZ350*'''ES15''' – 4 kV, 700 W, 6 MHz Power triode, μ = 12.5, 16.5 V/17.5 A filament*'''ES85''' (242A) – 1.25 kV, 85 W RF/AF Power triode, μ = 12.7, hard glass envelope, 10 V/3.25 A filament, B4F/U4J Jumbo base*'''ES204A''' (μ = 25), '''ES204X''' (μ = 38) – 3 kV, 250 W, 2 MHz Power triode, 11 V/6.3 A filament*'''ES207''' – 5 kV, 800 W, 75 MHz Power triode, μ = 50, 16.5 V/18 A filament*'''ES253''' – 12 kV, 800 W, 6 MHz Power triode, μ = 50, 16.5 V/16.5 A filament*'''ES275''' – 2.5 kV, 275 W, 1.5 MHz Power triode, μ = 16, 17 V/2.5 A filament*'''ES357''' – 4 kV, 350 W, 100 MHz Power triode, μ = 32, 10 V/10 A filament*'''ES450''' – 7 kV, 450 W, 1 MHz Power triode, μ = 30, 17 V/5.65 A filament*'''ES833''' – 3 kV, 300 W, 30 MHz Power triode, μ = 35, 10 V/10 A filament*'''ES1001''' – 5 kV, 1 kW AF Power triode, μ = 40, 10 V/18 A filament*'''ES1500''' – 7.5 kV, 1.5 kW, 1 MHz Power triode, μ = 45, 15.5 V/24 A filament:*'''ES1500A''', '''ES1500A/1''' – 7.5 kV, 1.5 kW, 20 MHz Power triode, μ = 45, hard glass envelope, 15.5 V/24 A filament:*'''ES1500B''', '''ES1500B/1''' – 7.5 kV, 1.5 kW, 2 MHz power triode, μ = 37, 17 V/27 A filament:*'''ES1500C''', '''ES1500C/1''' – 7.5 kV, 1.5 kW, 2 MHz power triode, μ = 35, hard glass envelope, 14.5 V/28 A filament*'''B1153''' – 50 MHz, 800 W Power triode, 6.3 V/32.5 A filament, ventilated 4-pin base*'''ACM3''' – 2 kW, 15 MHz Forced-air cooled power triode used as a video modulator, 6 V/17 A heater*'''CAM2''' – 5 kW Water-cooled AF power triode, 16.5-17.5 V/24 A filament*'''CAM3''' – 12 kW Water-cooled AF power triode, 17 V/70 A filament*'''TT10''' (813 = QY2-100) – 100 W, 30 MHz Beam power tetrode, 10 V/5 A filament, special 7-pin base with anode on top cap*'''TT12''' – 2.7 W, 20 MHz Beam power tetrode, 19 V/420 mA heater, B9G 9-pin Loctal base with anode on top cap*'''TT15''' – 15 W, 160 MHz Beam power tetrode, 6.3 V/1.6 A heater, B9G 9-pin Loctal base*'''TT16D''' = '''QY3-125''' – 125 W, 120 MHz Beam power tetrode, 5 V/6.5 A filament, B5D/U5G ''Giant 5-pin'' UY base with anode on top cap*'''TT20''' = '''QQE03/20''' (2B52, QQV03-20) – 2×10 W, 600 MHz Dual beam power tetrode, center-tapped 12.6 V/650 mA resp. 6.3 V/1.3 A heater, Septar base with anodes on top pins*'''TT24''' – 10 W, 225 MHz Dual beam power tetrode, center-tapped 6.3 V/830 mA heater, Noval base*'''1E3''' – UHF Triode, 220 mA filament, Noval base*'''12FB5''' – Power pentode used as CRT vertical deflection amplifier, 300 mA heater, Noval base*'''60E3''' – Half-wave rectifier, 60 V heater, Miniature 7-pin base*'''60HL5''' – 6HL5 or 12HL5 Beam power tetrode with a 60 V heater*'''QY2-100''' = '''813''' – 100 W, 30 MHz Beam power tetrode, 10 V/5 A filament, B7D/U7G ''Giant 7-pin'' base with anode on top cap*'''214E''' – Directly heated half-wave vacuum rectifier, 10 V/3.25 A filament, 4-pin base<ref>{{cite web |url=https://static1.squarespace.com/static/5f0983034219c6086e8100ac/t/5f452db00e3d7a39015517bb/1598369200518/214E.pdf |title=214-E Vacuum tube |publisher=[[Western Electric]] |access-date=12 October 2024}}</ref>*'''237A''' (WE) – 50 kV, Water-cooled, directly heated rectifier, 20 V/61 A filament<ref>{{cite web |url=https://frank.pocnet.net/sheets/136/2/237A.pdf |title=237A Vacuum tube |publisher=[[Western Electric]] |year=1936 |access-date=12 June 2021}}</ref>*'''266B''', '''266C''' – 22 kV, 10 A Mercury-vapor rectifier, 5 V/42 A filament<ref>{{cite web |url=https://static1.squarespace.com/static/5f0983034219c6086e8100ac/t/5f4535ec15693e18b9f334e2/1598371331368/266B.pdf |title=266B Vacuum tube |publisher=[[Western Electric]] |year=1948 |access-date=12 October 2024}}</ref><ref>{{cite web |url=https://static1.squarespace.com/static/5f0983034219c6086e8100ac/t/5f45362015693e18b9f34093/1598371380034/266C.pdf |title=266C Vacuum tube |publisher=[[Western Electric]] |year=1948 |access-date=12 October 2024}}</ref>*'''274A''' (UX4 base), '''274B''' (Octal base) – Directly heated half-wave vacuum rectifier, 5 V/2 A filament<ref>{{cite web |url=https://static1.squarespace.com/static/5f0983034219c6086e8100ac/t/5f4537050879e4428f7293e1/1598371591908/274A.pdf |title=274A Vacuum tube |publisher=[[Western Electric]] |access-date=12 October 2024}}</ref><ref>{{cite web |url=https://static1.squarespace.com/static/5f0983034219c6086e8100ac/t/5f453730c1d86261664cb289/1598371634401/274B.pdf |title=274B Vacuum tube |publisher=[[Western Electric]] |access-date=12 October 2024}}</ref>*'''280A''' (WE) – 3.5 kV, 500 mA<sub>peak</sub> Mercury-vapor rectifier, 2.5 V/3 A filament, UX4 Bayonet base<ref>{{cite web |url=https://static1.squarespace.com/static/5f0983034219c6086e8100ac/t/5f4537ac0a513467b40bbd9e/1598371757237/280A.pdf |title=280A Vacuum tube |publisher=[[Western Electric]] |access-date=14 October 2024}}</ref>*'''HK354''' – 150 W, 15 MHz ''Gammatron'' Radiation-cooled power triode, μ = 14, 5 V/10 A filament, Tantalum anode, [[Pyrex|''Nonex'']] hard glass envelope, U4J Jumbo base with anode on top cap; predecessor of the 150T (=250TL), the first Eimac tube*'''15E''' = '''3-15A3''' = '''4C30''' = '''8023''' – 20 W, 600 MHz Miniature pulse power triode, μ = 25, 5 V/4 A filament, grid on top pin and anode on side pin,<ref>15E on [https://lampes-et-tubes.info/tt/tt082.php?l=e lampes-et-tubes.info] • [http://www.r-type.org/exhib/aaa1247.htm r-type.org] • [https://www.radiomuseum.org/tubes/tube_15e.html radiomuseum.org] • [https://www.ase-museoedelpro.org/Museo_Edelpro/Catalogo/tubes/records_nw/15E/15E.pdf ase-museoedelpro.org]</ref> used as power oscillator, also popular as [[Thermionic emission|thermally-limited (=''saturated'') emission]] [[Noise generator|noise diode]]<ref>[https://archive.org/details/dli.ernet.15446 Microwave Receivers], S. N. Van Voorhis, [[MIT Radiation Laboratory|MIT Rad Lab]] Series, 1948, archived from [[Digital Library of India]]</ref>{{rp|321}}*'''15R''' = '''4B30''' – 20 kV, 20 A<sub>peak</sub>, 30 mA<sub>avg</sub> Pulse rectifier, 5 V/4 A filament, anode on top cap<ref>15R on [http://www.r-type.org/exhib/aaa0534.htm r-type.org] • [https://www.radiomuseum.org/tubes/tube_15r.html radiomuseum.org]</ref>*'''25T''' = '''3-25A3''' = '''3C34''' – 25 W Power triode, μ = 24, 6.3 V/3 A filament, UX4 base with anode on top pin*'''35T''' = '''3-50A4''' (Grid on base), '''35TG''' = '''3-50D4''' (grid on side pin) – 50 W, 100 MHz Power triode, μ = 39, 5 V/4 A filament, UX4 base with anode on top pin*'''75TL''' = '''3-75A2''' (μ = 12), '''75TH''' = '''3-75A3''' (μ = 20) – 75 W, 40 MHz Power triode, 5 V/6.25 A filament, UX4 base with grid on side pin and anode on top pin*'''100R''' = '''8020''' – 40 kV, 100 mA Thermally-limited emission rectifier, 5 V/6.5 A filament, UX4 base with anode on top cap*'''100T''' = '''100TL''' = '''3-100A2''' (=up-rated '''50T'''; μ = 14), '''100TH''' = '''3-100A4''' (μ = 38) – 100 W, 40 MHz Directly heated power triode, 5 V/6.3 A filament, UX4 base with grid on side pin and anode on top pin*'''152TL''' = '''3-150A2''' (μ = 12), '''152TH''' = '''3-150A3''' (μ = 20) – 150 W, 40 MHz Power triode, center-tapped 10 V/6.25 A resp. 5 V/12.5 A filament, 4-pin Bayonet base with anode on top pin*'''250R''' – 60 kV, 250 mA Thermally-limited emission rectifier, 5 V/10.5 A filament, U4J Jumbo base with anode on top cap*'''304TL''' = '''3-300A2''' (μ = 12), '''304TH''' = '''3-300A4''' (μ = 20) – 300 W, 40 MHz Power triode, center-tapped 10 V/12.5 A resp. 5 V/25 A filament, 4-pin Bayonet base with grid on side cap and anode on top cap*'''750T''' = '''750TL''' = '''3-750A2''' (=up-rated '''500T''') – 750 W, 40 MHz Directly heated power triode, μ = 15.5, 7.5 V/21 A filament, U4J Jumbo base with grid on side cap and anode on top cap*'''1000T''' = '''3-1000A4''' (6C21) – 1 kW, 50 MHz Directly heated power triode, μ = 35, 7.5 V/17 A filament, U4J Jumbo base with grid on side cap and anode on top cap*'''1500T''' = '''3-1500A3''' – 1.5 kW, 40 MHz Directly heated power triode, μ = 24, 7.5 V/24 A filament, U4J Jumbo base with grid on side cap and anode on top cap*'''2000T''' = '''3-2000A3''' – 2 kW, 40 MHz Directly heated power triode, μ = 23, 10 V/25 A filament, U4J Jumbo base with grid on side cap and anode on top cap{{pb}}*'''UH50''' = '''3-50G2''' = '''304B''' = '''834''' – 50 W Radiation-cooled, directly heated power triode, μ = 10.6, 7.5 V/3.25 A filament, UX4 base with grid and anode on top cap. The up to cherry-red anode glow was recommended as tank/antenna tuning indicator*'''2-01C''' – 3 GHz, 1 kV, 1 mA, 100 mW ''Rocket''-type disk-seal, coaxial [[instrumentation]] rectifier diode, 5 V/310-390 mA heater*'''P220''' (μ = 12.5), '''P220A''' (μ = 6.5) – AF Power triode used as driver for the PD220, 2 V/200 mA filament, A4A European 4-pin base*'''Pen24''' – 440 mW Class-A output AF power pentode, 2 V/300 mA filament, MazdaOctal base*'''Pen25''' – 400 mW<sub>out</sub> AF Power pentode, 2 V/150 mA filament, MazdaOctal base*'''Pen44''' – 18 W AF Beam power tetrode, 4 V/2.1 A heater, MazdaOctal base*'''Pen45''' – 5.8 W<sub>out</sub> AF Beam power tetrode, 4 V/1.75 A heater, MazdaOctal base:*'''Pen45DD''' – Pen45 + Dual diode, 4 V/2 A heater, MazdaOctal base with control grid on top cap*'''Pen46''' – 20 W Beam power tetrode used as CRT horizontal deflection amplifier, 4 V/1.75 A heater, MazdaOctal base with anode on top cap*'''Pen141''' – 240 mW<sub>out</sub> AF Power pentode, 1.4 V/100 mA filament, MazdaOctal base*'''Pen220''' – 290 mW<sub>out</sub> AF Power pentode, 2 V/200 mA filament, O5A European 5-pin base*'''Pen231''' – 350 mW<sub>out</sub> AF Power pentode, 2 V/300 mA filament, O5A European 5-pin base*'''Pen383''' – 10 W AF Beam power tetrode, 38 V/200 mA heater, MazdaOctal base*'''Pen384''' – 10 W AF Beam power tetrode for use on 110V mains, 38 V/200 mA heater, MazdaOctal base*'''Pen453DD''' – Dual diode + 10 W AF Beam power tetrode, 45 V/200 mA heater, MazdaOctal base with control grid on top cap*'''Pen3520''' – 8 W AF Power pentode, 35 V/200 mA heater, M7A British 7-pin base*'''Pen3820''' – 10 W AF Beam power tetrode, 38 V/200 mA heater, M7A British 7-pin base*'''PenDD4020''' – Dual diode + 10 W AF power pentode, 40 V/200 mA heater, M7A British 7-pin base*'''PenDD4021''' – Dual diode + 10 W AF Beam power tetrode, 45 V/200 mA heater, M7A British 7-pin base*'''1C1''' – [[Pentagrid converter]], Miniature 7-pin base*'''1D13''' – Diode, Miniature 7-pin base*'''1F3''' – Remote-cutoff RF pentode, Miniature 7-pin base*'''1FD9''' = '''1S5/DAF91''' – Diode + AF pentode, Miniature 7-pin base*'''1P10''' – Power pentode, Miniature 7-pin base*'''6C9''' – Triode/hexode oscillator/mixer, Rimlock base*'''6C31''' – Triode/hexode oscillator/mixer, Octal base*'''6D1''' – Diode used as video detector in TV receivers, B3G wire-ended*'''6D2''' – Dual diode, Miniature 7-pin base*'''6F1''' – Sharp-cutoff RF pentode, Rimlock base*'''6F11''' – Sharp-cutoff RF pentode, Rimlock base*'''6F13''' – Sharp-cutoff RF pentode, Rimlock base*'''6F14''' – Sharp-cutoff Video pentode, Rimlock base*'''6F15''' – Remote-cutoff RF pentode, Rimlock base*'''6F18''' – Remote-cutoff RF pentode, Noval base*'''6F21''' – Remote-cutoff RF pentode, Miniature 7-pin base*'''6F23''' = '''6EL7''' – Sharp-cutoff Video pentode, Noval base*'''6F25''' – Remote-cutoff RF frame-grid pentode, Noval base*'''6F26''' – Remote-cutoff RF pentode, Noval base*'''6F32''' – [[#Dual-control|{{color|Green|Dual-control}}]], semiremote-cutoff pentode used as the [[Electrical reactance|reactance]] tube in [[Automatic frequency control|AFC]] circuits,<ref name="AFC_reactance_tube" /> MazdaOctal base*'''6H1''' – Hexode, Miniature 7-pin base*'''6L1''' – Dual triode, Rimlock base*'''6L18''' – Triode, Rimlock base*'''6LD20''' – Dual diode + triode, Rimlock base*'''6P25''' – Beam power tetrode, Octal base*'''11A1''' – 15 W, 300 V Power triode used as series-pass regulator in stabilized DC power supplies, 6.3 V/950 mA heater, Noval base*'''11E2''' (Octal base), '''11E3''' (M7A British 7-pin base) – Pulse-rated beam power tetrodes*'''12E1''' – Beam power tetrode, Octal base*'''12E12''' – Pulse-rated beam power tetrode, 26 V/1.6 A heater, A4A European 4-pin base*'''13E1''' = '''7972''' = EEV '''C1158''' – 90 W Beam power tetrodes used in DC power supplies, center-tapped 26 V/1.3 A resp. 13 V/2.6 A heater, Septar base*'''19G3''' – Half-wave rectifier, Octal base*'''19G6''' – Half-wave rectifier, Miniature 7-pin base*'''19E2''' – Pulse rectifier, Octal base*'''19H1''' (A4A European 4-pin base), '''19H4''' (Octal base) – CRT EHT rectifier*'''19H5''' – Damper/rectifier diode, E40 ''Goliath'' Edison screw lamp base*'''ES450X''' – 5 kV, 450 W RF Power triode, 18 V/5.15 A filament*'''PM1''', '''PM1A''' = Cossor '''210RC''' – AF Triode for use in [[RC circuit|RC]]-coupled amplifiers, 2 V/100 mA filament, A4A European 4-pin base*'''PM1HF''' = Cossor '''210HF''' – RF/IF Triode, 2 V/100 mA filament, A4A European 4-pin base*'''PM1HL''' = Cossor '''210HL''' = Dario '''TB282''' = Tungsram '''HR210''' – RF/AF Triode, 2 V/100 mA filament, A4A European 4-pin base*'''PM1LF''' = Cossor '''210LF''' = Dario '''TB102''' – AF Triode, 2 V/100 mA filament, A4A European 4-pin base*'''PM2''', '''PM2A''' – Power triode for Class-A amplifiers, 2 V/200 mA filament, A4A European 4-pin base*'''PM2B''', '''PM2BA''' – Power triode for Class-B amplifiers, 2 V/200 mA filament, M7A British 7-pin base*'''PM2DX''' = Dario '''TB172''' – AF Triode, 2 V/100 mA filament, A4A European 4-pin base*'''PM4''' – Power triode, 4 V/100 mA filament, A4A European 4-pin base*'''PM6''' – Power triode, 6 V/100 mA filament, A4A European 4-pin base*'''PM12''' (Sharp-cutoff), '''PM12V''' (remote-cutoff) – Tetrode, 2 V/150 mA filament, A4A European 4-pin base*'''PM16''' – Sharp-cutoff tetrode, 6 V/75 mA filament, A4A European 4-pin base*'''PM22''', '''PM22A''', '''PM22C''' – "Super Power" pentode, 2 V/300 mA filament, A4A European 4-pin or European 5-pin base*'''PM24A''' (4 VAC/275 mA filament), '''PM24B''' (4 VAC/1 A filament), '''PM24C''' (4 VAC/1 A filament), '''PM24D''' (4 VAC/2 A filament) – Power pentode used with a small, wirewound potentiometer across the floating AC heater supply with its slider tied to signal ground, to cancel out mains hum, O5A European 5-pin base*'''PM202''' – "Super Power" triode, 2 V/200 mA filament, A4A European 4-pin base*'''PM252''' – "Super Power" triode, 2 V/400 mA filament, A4A European 4-pin base*'''PM256''' – "Super Power" triode, 6 V/250 mA filament, A4A European 4-pin base*'''2D13''', '''2D13A''' (V5A Side-contact 5 base), '''2D13C''' (O5A European 5-pin base) – Dual '''D'''iode, '''13''' V/200 mA heater*'''GT4A''' ('''4''' V/1.2 A heater), '''GT4C''' (EC50 with a 4 V/2.4 A heater) – [[Thyratron|'''G'''as '''T'''riodes]], P8A Side-contact 8 base with grid on top cap*'''HL13''' (P8A Side-contact 8 base), '''HL13C''' (M7A British 7-pin base) – Triode, 13 V/200 mA heater, grid on top cap*'''HVR1''' (2 V/290 mA filament), '''HVR2''' (4 V/650 mA filament) – Half-wave, '''H'''igh-'''V'''oltage '''R'''ectifier, A4A European 4-pin base with anode on top cap*'''PenA4''' (4 V/1.95 A heater, M7A British 7-pin base), '''Pen4VA''' (4 V/1.35 A heater, O5A European 5-pin base with screen grid on a side terminal), '''Pen4VB''' (slow-heating PenA4) – Power '''Pen'''todes*'''Pen26''' – Power '''Pen'''tode, 24 V/200 mA heater, P8A side-contact 8 base*'''Pen36C''' – Power '''Pen'''tode, 33 V/200 mA heater, M7A British 7-pin base*'''Pen40DD''' – Power '''Pen'''tode + dual '''D'''iode, 44 V/200 mA heater, M7A British 7-pin base with control grid on top cap*'''SP13''' – ('''S'''creen grid) RF '''P'''entode, '''13''' V/200 mA heater, P8A Side-contact 8 base with control grid on top cap*'''T4D''' – Subminiature '''T'''elevision '''D'''iode, '''4''' V/200 mA heater, all-glass wire-ended*'''TH4''', '''TH4A''' ('''4''' V/1 A heater), '''TH13C''' ('''13''' V/310 mA heater), '''TH21C''' ('''21''' V/200 mA heater), '''TH22C''', '''TH30C''' (29 V/200 mA heater) – [[Pentagrid converter#Hexode|'''T'''riode/'''H'''exode oscillator/mixer]], M7A British 7-pin base with #1 Hexode grid on top cap*'''TSE4''' – '''T'''elevision '''S'''econdary '''E'''mission pentode, '''4''' V/1.1 A heater, M7A British 7-pin base with control grid on top cap*'''TSP4''' – '''T'''elevision high-'''S'''lope '''P'''entode, '''4''' V/1.3 A heater, M7A British 7-pin base with control grid on top cap*'''1AF33''' = '''1AH5/DAF96''' (1.4 V/25 mA filament), '''1AF34''' (1.2 V/30 mA filament) – Diode + AF pentode, Miniature 7-pin base*'''1F33''' = '''1AJ4/DF96''' (1.4 V/25 mA filament), '''1F34''' (1.2 V/30 mA filament) – Remote-cutoff RF/IF pentode, Miniature 7-pin base*'''1H33''' = '''1R5-SF''' = '''1AQ5''' (=1R5/DK91 with a 1.4 V/25 mA filament), '''1H34''' (1.2 V/30 mA filament) – Heptode pentagrid converter with American grid topology, anode voltage in the 45...90 volt range, Miniature 7-pin base*'''1H35''' = '''1AB6/DK96''' – Heptode pentagrid converter with suppressor (#5) grid internally tied to the positive 1.4 V/25 mA filament end, Miniature 7-pin base*'''3L31''', '''3L32''' – Power pentodes, center-tapped 2.8 V/50 mA resp. 1.4 V/100 mA filament, Miniature 7-pin base*'''6B31''', '''6B32''' = '''6AL5/EAA91/EB91'''' = '''6Х2П{{Abbr|↦|Maps to Latin:}}6H2P (Different pinout) – 700 MHz Dual diode, 6.3 V/300 mA heater, Miniature 7-pin base*'''6CC10''' = '''[[#6SN7|{{color|Green|6SN7-GT}}]]''' – Dual triode, 6.3 V/600 mA heater, Octal base*'''6F31''' = '''6BA6/EF93''' – Remote-cutoff pentode, 6.3 V/300 mA heater, Miniature 7-pin base*'''6F32''' = '''[[#6AK5/EF95|{{color|Green|6AK5/EF95}}]]''' = '''6Ж1П'''{{Abbr|↦|Maps to Latin:}}'''6J1P''' – Sharp-cutoff pentode, 6.3 V/175 mA heater, Miniature 7-pin base*'''6F35''' = '''6AJ5/6АЖ5''' – Low (6.3-80 V) anode voltage, sharp-cutoff pentode, 6.3 V/175 mA heater, Miniature 7-pin base*'''6L31''' = '''[[#6AQ5|{{color|Green|6AQ5/EL90}}]]''' – Power pentode, 6.3 V/450 mA heater, Miniature 7-pin base*'''6L43''' = '''6CL6''' – Power pentode used as CRT cathode driver, 6.3 V/650 mA heater, Noval base*'''6Z31''' = '''[[#6X4/6BX4/EZ90|{{color|Green|6X4/6BX4/EZ90}}]]''' = '''6Ц4П'''{{Abbr|↦|Maps to Latin:}}'''6C4P''' – Full-wave rectifier, 6.3 V/600 mA heater, Miniature 7-pin base*'''12BC32''' = '''12AV6/HBC91''' – 6BC32 Dual diode + triode with a 12.6 V/150 mA heater*'''12F31''' = '''12BA6/HF93''' – 6F31 Remote-cutoff pentode with a 12.6 V/150 mA heater*'''12H31''' = '''12BE6/HK90''' – 6H31 Pentagrid converter with a 12.6 V/150 mA heater*'''25Z4''', '''25Z4-GT''' – 125 V<sub>rms</sub>, 125 mA Half-wave rectifier, Octal base*'''R21''' – Miniature triode, 3.8 V/700 mA filament, A4A European 4-pin base*'''RT55''' – IF/AF Triode, 3.4-3.8 V/100 mA filament, A4A European 4-pin base*'''R56''' (4 V/100 mA filament), '''RT656''' (600 mV/1.5 A filament) – Power triode, A4A European 4-pin base*'''RT62''' – RF/IF/AF Triode, 3.4-3.8 V/100 mA filament, A4A European 4-pin base*'''RT63''' – AF Triode for use in [[RC circuit|RC]]-coupled amplifiers, 3.2-3.8 V/70 mA filament, A4A European 4-pin base*'''R122N''' (18 V/225 mA heater), '''R123''' (18 V/400 mA heater) – Long-life pentodes, Octal base*'''R126F''' – Remote-cutoff pentode, 18 V/225 mA heater, Miniature 7-pin base*'''R142''' (6.3 V/300 mA heater), '''R143''' (6.3 V/240 mA heater), '''R145''' (18 V/85 mA heater), '''R147''' (18 V/140 mA heater) – Long-life, sharp-cutoff pentode, B8P ([[Postes, Télégraphes et Téléphones (France)|French ''PTT'']]''-49'') 8-pin base*'''R165''' – Sharp-cutoff pentode, 18 V/105 mA heater, Noval base*'''V55''' – Full-wave rectifier, 600 mV/1.5 A filament, A4A European 4-pin base*'''V56''' – Half-wave rectifier, 3.4-3.8 V/100 mA filament, A4A European 4-pin base*'''V70''' – {{lang|fr|Le Raythéon}} Helium-filled, cold-cathode, full-wave rectifier; [[#O1925O|{{color|Green|Raytheon type B}}]] with an A4A European 4-pin base*'''F9044''' – Electrostatic relay used to convert a minuscule current into a frequency*'''F9066''', '''F9067''', '''F9068''', '''F9069''' – [[Mercury coulometer]]s*'''6С41С''' ⟼ '''6S41S''' – Power triode used as series-pass voltage regulator, Septar base*'''ГИ-5Б''' ⟼ '''GI-5B''' – 6 kW Forced-air cooled, glass/metal, pulse-rated power triode<ref>CIA Studies in intelligence Vol. 12 No. 2: [https://www.cia.gov/resources/csi/static/Crystal-Balls-Glass-Bottles.pdf Crystal Balls and Glass Bottles] (Spring 1968)</ref><!-- https://www.cia.gov/readingroom/docs/CIA-RDP78T03194A000300010002-0.pdf -->*'''ГИ-6Б''' ⟼ '''GI-6B''' – 350 W Forced-air cooled, ceramic/metal, pulse-rated power tetrode*'''ГИ-11Б''' ⟼ '''GI-11B''' – 80 W Forced-air cooled, ceramic/metal, pulse-rated power triode*'''ГИ-12Б''' ⟼ '''GI-12B''' – 80 W Forced-air cooled, ceramic/metal, pulse-rated power triode*'''ГИ-13БМ''' ⟼ '''GI-13BM''' – 80 W Forced-air cooled, ceramic/metal, pulse-rated power triode*'''ГИ-15Б''', '''ГИ-15Б-1''' ⟼ '''GI-15B''', '''GI-15B-1''' – 80 W Forced-air cooled, ceramic/metal, pulse-rated power triode*'''ГИ-19Б''' ⟼ '''GI-19B''' – 1 kW Forced-air cooled, glass/metal, pulse-rated power triode*'''ГИ-21Б''' ⟼ '''GI-21B''' – 110 W Forced-air cooled, ceramic/metal, pulse-rated power triode*'''ГИ-23Б''' ⟼ '''GI-23B''' – 300 W Forced-air cooled, ceramic/metal, pulse-rated power triode*'''ГИ-25''' ⟼ '''GI-25''' – 12 W [[Titanium]]-ceramic/metal, pulse-rated power triode*'''ГИ-26А'''. '''ГИ-26Б''' ⟼ '''GI-26A''' (Water-cooled, 60 kW), '''GI-26B''' (forced-air cooled, 30 kW) – Glass/metal, pulse-rated power triode*'''ГИ-27АМ''' ⟼ '''GI-27AM''' – 25 kW Water-cooled, ceramic/metal, pulse-rated power triode*'''ГИ-30''' ⟼ '''GI-30''' – 15 W Dual RF beam power tetrode*'''ГИ-31''' ⟼ '''GI-31''' – 12 W Ceramic/metal, pulse-rated power triode*'''ГИ-39Б''' ⟼ '''GI-39B''' – 440 W Forced-air cooled, ceramic/metal, pulse-rated power triode*'''ГИ-41''', '''ГИ-41-1''' ⟼ '''GI-41''', '''GI-41-1''' – 40 W, 3 GHz Ceramic/metal, pulse-rated power triode*'''ГИ-42Б''' ⟼ '''GI-42B''' – 18 kW Forced-air cooled, ceramic/metal, pulse-rated power triode*'''ГИ-46Б''' ⟼ '''GI-46B''' – 350 W Forced-air cooled, ceramic/metal, pulse-rated power triode*'''ГИ-50А''' ⟼ '''GI-50A''' – 40 kW Water-cooled, ceramic/metal, pulse-rated power triode*'''ГИ-53''' ⟼ '''GI-53''' – 10 W Contact/conduction-cooled, ceramic/metal, pulse-rated power triode*'''ГИ-54А''' ⟼ '''GI-54A''' = 7835*'''ГИ-130М''' ⟼ '''GI-130M''' – ГИ-13БМ with contact/conduction cooling*'''ГИ-150''', '''ГИ-150-1''' ⟼ '''GI-150''', '''GI-150-1''' – ГИ-150, ГИ-150-1 with contact/conduction cooling*'''ГИ-210''' ⟼ '''GI-210''' – ГИ-21Б with contact/conduction cooling*'''ГМИ-2Б''' ⟼ '''GMI-2B''' – 900 W Forced-air cooled, glass, pulse modulator power tetrode*'''ГМИ-5''' ⟼ '''GMI-5''' – 50 W Forced-air cooled, glass, pulse modulator power tetrode*'''ГМИ-6''', '''ГМИ-6-1''' ⟼ '''GMI-6''', '''GMI-6-1''' – 15 W Forced-air cooled, glass, dual pulse modulator beam power tetrode*'''ГМИ-7-1''' ⟼ '''GMI-7-1''' – 125 W Forced-air cooled, glass, pulse modulator power tetrode*'''ГМИ-10''' ⟼ '''GMI-10''' – 41 W Glass, pulse modulator power tetrode*'''ГМИ-14Б''' ⟼ '''GMI-14B''' – 600 W Forced-air cooled, glass/metal, pulse modulator power tetrode*'''ГМИ-16Р''' ⟼ '''GMI-16R''' – 9 W Glass, pulse modulator beam power pentode*'''ГМИ-19Б''' ⟼ '''GMI-19B''' – 1 kW Forced-air cooled, glass/metal, pulse modulator power tetrode*'''ГМИ-30''' ⟼ '''GMI-30''' – 300 W Glass, pulse modulator power triode*'''ГМИ-32Б''', '''ГМИ-32Б-1''' ⟼ '''GMI-32B''', '''GMI-32B-1''' – 2 kW Forced-air cooled, glass/metal, pulse modulator power tetrode*'''ГМИ-34А''', '''ГМИ-34Б''' ⟼ '''GMI-34A''' (Water-cooled), '''GMI-34B''' (forced-air cooled) – 3 kW Ceramic/metal, pulse modulator power triode*'''ГМИ-37А''' ⟼ '''GMI-37A''' – 50 kW Water-cooled, ceramic/metal, pulse modulator power triode*'''ГМИ-41А''' ⟼ '''GMI-41A''' – 10 kW Liquid-cooled, ceramic/metal ''Injectron'' - cf. ''[[#Neotron|{{color|Green|Neotron}}]]''*'''ГМИ-42Б''' ⟼ '''GMI-42B''' – 500 W Forced-air cooled, ceramic/metal, pulse modulator power triode*'''ГМИ-46Б''' ⟼ '''GMI-46B''' – 1 kW Forced-air cooled, ceramic/metal, pulse modulator power triode*'''ГМИ-47А''' ⟼ '''GMI-47A''' – 25 kW Liquid-cooled pulse modulator power triode with an [[Ion pump|electric-discharge vacuum pump]]*'''ГМИ-83В''' ⟼ '''GMI-83V''' – 60 W Glass, pulse modulator power tetrode*'''ГМИ-90''' ⟼ '''GMI-90''' – 140 W Glass, pulse modulator power tetrode*'''ГС-3А''', '''ГС-3Б''' ⟼ '''GS-3A'' (Water-cooled, 3 kW), '''GS-3B''' (Forced-air cooled, 2 kW) – 600 MHz Ceramic/metal, coaxial beam power tetrode*'''ГС-9Б''' ⟼ '''GS-9B''' – 300 W, 1.6 GHz Forced-air cooled, ceramic/metal, coaxial power triode*'''ГС-11''' ⟼ '''GS-11''' – 1.5 W, 2 GHz Miniature, Titanium-ceramic/metal power triode*'''ГС-14''' ⟼ '''GS-14''' – 28 W, 3.9 GHz Titanium-ceramic/metal, coaxial power triode*'''ГС-15Б''' ⟼ '''GS-15B''' – 200 W, 1 GHz Forced-air cooled, ceramic/metal, coaxial power triode*'''ГС-17Б''' ⟼ '''GS-17B''' – 10 kW, 960 MHz Forced-air cooled, ceramic/metal, coaxial power tetrode*'''ГС-23Б''' ⟼ '''GS-23B''' – 1.5 kW, 1 GHz Forced-air cooled, ceramic/metal, coaxial power tetrode*'''ГС-24Б''' ⟼ '''GS-24B''' – 120 W, 600 MHz Forced-air cooled, ceramic/metal, coaxial power triode*'''ГС-27Б''' ⟼ '''GS-27B''' – 100 W, 1 GHz Forced-air cooled, ceramic/metal, coaxial power tetrode*'''ГС-30''' ⟼ '''GS-30''' – 40 W, 1.5 GHz Forced-air cooled, ceramic/metal, coaxial power triode*'''ГС-35Б''' ⟼ '''GS-35B''' – 1.5 kW, 1 GHz Forced-air cooled, ceramic/metal, coaxial power triode*'''ГС-36Б''' ⟼ '''GS-36B''' – 400 W, 500 MHz Forced-air cooled, ceramic/metal, coaxial power tetrode*'''ГС-90Б''' ⟼ '''GS-90B''' – ГС-9Б with contact/conduction cooling*'''ГУ-4А''' ⟼ '''GU-4A''' – 20 kW, 100 MHz Water-cooled, glass/metal power triode*'''ГУ-5А''', '''ГУ-5Б''' ⟼ '''GU-5A''' (Water-cooled, 3.5 kW), '''GU-5B''' (Forced-air cooled, 2.5 kW) – 110 MHz Glass/metal power triode*'''ГУ-10А''', '''ГУ-10Б''' ⟼ '''GU-10A''' (Water-cooled), '''GU-10B''' (forced-air cooled) – 10 kW, 26 MHz Glass/metal power triode*'''ГУ-13''' ⟼ '''GU-13''' – 100 W, 30 MHz Glass beam power tetrode*'''ГУ-17''' ⟼ '''GU-17''' – 12 W, 250 MHz Glass dual beam power tetrode*'''ГУ-19-1''' ⟼ '''GU-19-1''' – 40 W, 500 MHz Glass dual power pentode*'''ГУ-21Б''' ⟼ '''GU-21B''' – 10 kW, 26 MHz Forced-air cooled, glass/metal power triode*'''ГУ-22А''' ⟼ '''GU-22A''' – 20 kW, 26 MHz Water-cooled, glass/metal power triode*'''ГУ-23А''', '''ГУ-23Б''' ⟼ '''GU-23A''' (Water-cooled, 60 kW), '''GU-23B''' (forced-air cooled, 50 kW) – 26 MHz Glass/metal power triode*'''ГУ-33А''', '''ГУ-33Б''' ⟼ '''GU-33A''' (Liquid-cooled), '''GU-33B''' (forced-air cooled) – 150 W, 500 MHz Glass/metal power tetrode*'''ГУ-34Б''', '''ГУ-34Б-1''' ⟼ '''GU-34B''', '''GU-34B-1''' – 500 W, 250 MHz Forced-air cooled, glass/metal power tetrode*'''ГУ-36Б-1''' ⟼ '''GU-36B-1''' – 15 kW, 250 MHz Forced-air cooled, ceramic/metal power tetrode*'''ГУ-39А-1''', '''ГУ-39Б-1''', '''ГУ-39П-1''' ⟼ '''GU-39A-1''' (Water-cooled, 8 kW), '''GU-39B-1''' (forced-air cooled, 8 kW), '''GU-39P-1''' (water/vapor-cooled, 10 kW) – 30 MHz Forced-air cooled, glass/metal power tetrode*'''ГУ-43А''', '''ГУ-43Б''' ⟼ '''GU-43A''' (Liquid-cooled), '''GU-43B''' (forced-air cooled) – 1 kW, 100 MHz Glass/metal power tetrode*'''ГУ-44А''', '''ГУ-44Б''' ⟼ '''GU-44A''' (Water-cooled, 50 kW), '''GU-44B''' (forced-air cooled, 30 kW) – 32 MHz Glass/metal power tetrode*'''ГУ-45А''' ⟼ '''GU-45A''' – 20 kW, 50 MHz Water-cooled, glass/metal power triode*'''ГУ-46''' ⟼ '''GU-46''' – 500 W, 60 MHz Glass power pentode*'''ГУ-47А''', '''ГУ-47Б''' ⟼ '''GU-47A''' (Water-cooled, 6 kW), '''GU-47B''' (forced-air cooled, 4 kW) – 70 MHz Glass/metal power tetrode*'''ГУ-48''' ⟼ '''GU-48''' ([[#833|{{color|Green|833A}}]]) – 300 W, 75 MHz Glass power triode*'''ГУ-53А''', '''ГУ-53Б''' ⟼ '''GU-53A''' (Water-cooled, 50 kW), '''GU-53B''' (forced-air cooled, 45 kW) – 75 MHz Ceramic/metal power tetrode*'''ГУ-56''' ⟼ '''GU-56''' – 700 W, 45 MHz Glass/metal power triode*'''ГУ-61Б''', '''ГУ-61П''' ⟼ '''GU-61B''' (Forced-air cooled, 25 kW), '''GU-61P''' (water/vapor-cooled, 30 kW) – 70 MHz Ceramic/metal power tetrode*'''ГУ-62А''' ⟼ '''GU-62A''' – 40 kW, 85 MHz Water-cooled, glass/metal power triode*'''ГУ-63''' ⟼ '''GU-63''' – 13 W, 250 MHz Glass dual power tetrode*'''ГУ-66А''','''ГУ-66Б''', '''ГУ-66П''' ⟼ '''GU-66A''' (Water-cooled), '''GU-66B''' (forced-air cooled), '''GU-66P''' (water/vapor-cooled) – 60 kW, 30 MHz Ceramic/metal power triode*'''ГУ-68А''', '''ГУ-68П''' ⟼ '''GU-68A''' (Water-cooled), '''GU-68P''' (water/vapor-cooled) – 130 kW, 30 MHz Ceramic/metal power triode*'''ГУ-70Б''' ⟼ '''GU-70B''' – 350 W, 500 MHz Forced-air cooled, ceramic/metal power tetrode*'''ГУ-71Б''' ⟼ '''GU-71B''' – 1.5 kW, 75 MHz Forced-air cooled, ceramic/metal power pentode*'''ГУ-72''' ⟼ '''GU-72''' – 85 W, 100 MHz Glass/metal power tetrode*'''ГУ-73Б''', '''ГУ-73П''' ⟼ '''GU-73B''' (Forced-air cooled), '''GU-73P''' (water/vapor-cooled) – 3.5 kW, 250 MHz Ceramic/metal power tetrode*'''ГУ-74Б''' ⟼ '''GU-74B''' = Svetlana '''4CX800A''' – 600 W, 250 MHz Forced-air cooled, ceramic/metal power tetrode*'''ГУ-76Б''' ⟼ '''GU-76B''' – 3 kW, 75 MHz Forced-air cooled, ceramic/metal power tetrode*'''ГУ-80''', '''ГУ-81''', '''ГУ-81М''' ⟼ '''GU-80''' (Tungsram 5S045T), '''GU-81''', '''GU-81M''' – 450 W Glass, directly heated power pentode*'''ГУ-84Б''' ⟼ '''GU-84B''' – Forced-air cooled, ceramic/metal power tetrode*'''ГУ-88А''', '''ГУ-88П''' ⟼ '''GU-88A''' (Water-cooled, 400 kW, 30 MHz), '''GU-88P''' (water/vapor-cooled, 250 kW, 10 MHz) – Ceramic/metal power triode*'''ГУ-91Б''' ⟼ '''GU-91B''' = Svetlana '''4CX1600B''' – 1.6 kW, 250 MHz Forced-air cooled, ceramic/metal power tetrode*'''ГУ-92Б''' ⟼ '''GU-92B''' – 25 kW, 250 MHz Forced-air cooled, ceramic/metal power tetrode*'''ГУ-93Б''' ⟼ '''GU-93B''' – 4 kW, 250 MHz Forced-air cooled, ceramic/metal power tetrode*'''ГУ-94А''', '''ГУ-94П''' ⟼ '''GU-94A''' (Water-cooled, 160 kW), '''GU-94P''' (water/vapor-cooled, 100 kW) – 30 MHz Ceramic/metal power tetrode*'''ГУ-96А''', '''ГУ-96Б''' ⟼ '''GU-96A''' (Water-cooled), '''GU-96B''' (forced-air cooled) – 4 kW, 250 MHz Ceramic/metal power triode*'''BD21''' (200 V, Noval base), '''BD22''' (400 V, Noval base), '''BD23''' (600 V, Noval base), '''BD31''' (200 V, subminiature all-glass with 2 wire-ends), '''BD32''' (400 V, subminiature), '''BD35''' (475 V, subminiature) – 10 A<sub>peak</sub> Arc discharge tubes for use as switching element in a high voltage pulse generator such as an electric fence energizer*'''BR11''' (1.4 kV), '''BR12''' (2.5 kV) – 4 kA<sub>peak</sub> Arc discharge thyratron, UX4 Bayonet base with anode on top cap*'''BT31''' – 600 V, 300 mA<sub>avg</sub>, 10 A<sub>peak</sub> ''Arcotron'' Arc discharge thyratron, positive ''[[Glow discharge|Glow]]''-type keep-alive/primer electrode, Miniature 7-pin base*'''GA11''' (15 mm character height), '''GA12''' (30 mmCH), '''GA13''' (60 mmCH) – <span style="background: black;font: Arial;color: #FF4000"> ''0 1 2 3 4 5 6 7 8 9'' </span> Neon-filled digital indicator tube, side-viewing*'''GA21''' – <span style="background: black;font: Arial;color: #FF4000"> ''0 1 2 3 4 5 6 7 8 9'' </span> Neon-filled digital indicator tube, 19 mmCH top-viewing*'''GD135''' – 135 V, 2 mA Subminiature, precision switching diode, all-glass with 2 wire-ends*'''GR20''' – GR15 with two starters and a lower min. cathode current*'''GR32''' – 25 mA DC Pentode for voltage triggers, RC timers etc., one aux anode, one starter, ''Townsend''-type keep-alive/primer electrode, Noval base*'''GR33''' – 5-25 mA DC Tetrode for voltage triggers, RC timers etc., one starter, ''Townsend''-type keep-alive/primer electrode, Noval base*'''GR43''' – 1-5 mA Subminiature DC pentode, one starter, ''Townsend''-type keep-alive/primer electrode, all-glass with 4 wire-ends*'''GR44''' (Z70W, ZC1010) – 12 mA Subminiature DC pentode, two starters, ''Townsend'' keep-alive/primer plus Tritium primer, all-glass with 5 wire-ends*'''GS11''' – See G11 *'''GT21''' – AC/DC ''Glow Thyratron'', negative ''[[Glow discharge|Glow]]''-type keep-alive/primer electrode, Noval base*'''GZ11''' (5 kHz max.), '''GZ12''' (1 kHz max.) – Bidirecional decade ''Counter/Selector Dekatron''*'''GZ21''' – 10 kHz max. Bidirecional decade ''Counter Dekatron'', aux anodes to directly drive [[Nixie tube]]s*'''GZ22''' – 10 kHz max. Bidirecional decade ''Counter/Selector Dekatron'', aux anodes to directly drive Nixie tubes*'''SR44''' = '''ZZ1000''' – 85 V Subminiature voltage-regulator tube, all-glass with 2 wire-ends*'''SR54''' = '''5651''' – 86 V Voltage-regulator tube, Miniature 7-pin base*'''UA245''' – 245 V, 10 kA Cold-cathode surge protector, Miniature 7-pin base*'''UA600''' – 600 V, 10 kA Cold-cathode surge protector, Miniature 7-pin base*'''UAM120''' – 120 V, 1 kA Subminiature, cold-cathode surge protector, all-glass with wire-ends*'''UAM600''' – 670 V, 1 kA Subminiature, cold-cathode surge protector, all-glass with wire-ends*'''UC''' – 230 V, 25 kA Subminiature, cold-cathode surge protector, ceramic/metal with optional wire-ends*'''ER1''', '''ER2''' – DC Trigger triodes*'''ER3''', '''ER32''', '''ER33''' – DC Trigger pentodes (two starter electrodes and a primer electrode)*'''ER21''', '''ER21A''', '''ER22''' – AC Trigger triodes*'''ES1''', '''ES2''', '''ES11''' – Voltage-regulator tubes*'''1G50''' = '''2050''' – Xenon thyratron*'''1H16''' = '''816''' – Mercury-vapor rectifier*'''1K14''' – [[Instrumentation]] rectifier diode*'''1K20''' = '''8020''' – Thermally-limited emission diode*'''1K22''' = '''2X2A''' – EHT rectifier*'''1K24''' = '''3B24-W''' – EHT rectifier*'''1Q18''', '''1Q19''', '''1Q20''', '''1Q21''' – Electrometer tubes*'''2B29''' = '''829B''' – 40 W, 200 MHz Dual beam power tetrode*'''2B32''' = '''832A''' – 15 W, 150 MHz Dual beam power tetrode*'''2B46''' = '''[[#6146|{{color|Green|6146}}]]''' – 120 W, 60 MHz Beam power pentode*'''2B52''' = '''6252''' – 2×10 W, 200 MHz Dual power tetrode*'''2B94''' = '''5894''' – 2×20 W, 250 MHz Dual beam power tetrode*'''2H28''' = '''3B28''' – Xenon-filled half-wave rectifier*'''2H66''' = '''[[#866|{{color|Green|866A}}]]''' – Mercury-vapor rectifier*'''2P22''' = '''2E22''' – 30 W RF Power pentode*'''2T24''' – 25 W, 60 MHz High-μ power triode*'''2T27''', '''2T27A''' – 40 W, 100 MHz High-μ power triode*'''3T12''' – 90 W, 75 MHz High-μ power triode*'''3T35''', '''3T35A''', '''3T35C''' – 50 W, 100 MHz High-μ power triode*'''3G22''' = '''3D22A''' – Gas-filled tetrode thyratron*'''4B13''' = '''813''' – 100 W, 30 MHz Beam power tetrode*'''4F15R''' = '''4X150A/7034''' – 150 W, 150 MHz Beam power tetrode*'''4F16R''' = '''[[#6816|{{color|Green|6816}}]]''' – 115 W, 400 MHz beam power tetrode*'''4F21''' = '''4-125A/6155/4D21''' – 125 W, 120 MHz Beam power tetrode*'''4G63''' = '''5563''', '''4G63A''' = '''5563A''' – Mercury-vapor thyratron*'''4H72''' = '''[[#872|{{color|Green|872A}}]]''' – Mercury-vapor rectifier*'''4H73''' = '''673''' – Mercury-vapor rectifier*'''4T17''' = '''100TH''' – 100 W, 40 MHz High-μ power triode*'''5F20RA''' = '''4CX250B/[[#7203/4CX250B|{{color|Green|7203}}]]''' – 250 W, 500 MHz Beam power tetrode*'''5F22''' = '''4-250A/6156/5D22''' – 250 W, 110 MHz Beam power tetrode*'''5F23''' = '''4-400A/8438''' – 400 W, 110 MHz Beam power tetrode*'''5G44''' = '''5544''' – Gas-filled triode thyratron*'''5T20''' = '''250TL''' – 250 W, 40 MHz Low-μ power triode*'''5T21''' = '''250TH''' – 250 W, 40 MHz High-μ power triode*'''5T30''' = '''450TL''' – 450 W, 40 MHz Low-μ power triode*'''5T31''' = '''450TH''' – 450 W, 40 MHz High-μ power triode*'''6G45''' = '''5545''', '''6G45A''' – Gas-filled triode thyratron*'''6G67''' = '''6807''' – Gas-filled triode thyratron*'''6G68''' = '''6808''' – Gas-filled triode thyratron*'''6T35''' = '''750TL''' – 750 W, 40 MHz Low-μ power triode*'''7T40''' = '''1000T''' – 1 kW, 40 MHz High-μ power triode*'''B''' – 180 V, 60 mA Helium-filled, cold-cathode, full-wave rectifier for use in B+ (=anode supply) ''[[battery eliminator]]s'', UV4 Bayonet base, introduced in 1925 as ''The Raytheon'' by American Appliance Company, as their first product. Shortly thereafter, AAC changed their own name to "[[Raytheon Technologies|Raytheon Manufacturing Company]]" and the product name to "Type B"*'''BA''' (1 kV, 350 mA), '''BH''' (1 kV, 125 mA) – Gas-filled, cold-cathode, full-wave rectifiers, UX4 base*'''6MY8''' – ''Compactron'' Triode + beam power pentode, 1.45 A heater*'''DL1''' – Power pentode, 1.4 V/50 mA filament, side-contact 8 base*'''456A''' – Gas-filled, cold cathode voltage limiter used in repeaters to bypass the 455A heater in case of breakage*'''458A''' – Gas-filled, cold cathode surge protector used in 455A repeater inputs and outputs*'''2J22''' (3.45-3.55 GHz), '''2J23''' (3.071-3.1 GHz), '''2J24''' (3.047-3.071 GHz), '''2J25''' (3.019-3.047 GHz), '''2J26''' (2.992-3.01 GHz), '''2J27''' (2.965-2.992 GHz), '''2J28''' (2.939-2.965 GHz), '''2J29''' (2.914-2.939 GHz), '''2J30''' (2.86-2.9 GHz), '''2J31''' (2.82-2.86 GHz), '''2J32''' (2.78-2.82 GHz), '''2J33''' (2.74-2.78 GHz), '''2J34''' (2.7-2.74 GHz) – 240 W, Forced-air cooled, pulsed Magnetrons, 6.3 V/1.5 A heater*'''2J35''' – 1 W, 3 GHz Magnetron, 1.8 V/2 A heater, glass envelope, UX4 base*'''2J36''' – 12 W, 9.003-9.168 GHz Pulsed Magnetron, 6.3 V/1.3 A heater*'''2J37''' – 80 W, 3.267-3.277 GHz Pulsed Magnetron, 6.3 V/1.5 A heater*'''2J38''' – 10 W, 3.249-3.263 GHz Pulsed Magnetron, 6.3 V/1.25 A heater*'''2J39''' – 12 W, 3.267-3.355 GHz Pulsed Magnetron, 6.3 V/1.25 A heater*'''2J40''' – 10 W, 9.305-9.325 GHz Pulsed Magnetron, 6.3 V/1.3 A heater*'''2J54''' – 38 kW, 3.123-3.259 GHz Forced-air cooled, pulsed Magnetron, 6.3 V/1.5 A heater*'''2J58''' – 60 W, 2.965-3.019 GHz Pulsed Magnetron, 6.3 V/1.5 A heater*'''2J59''' – 50 W, 3.236-3.276 GHz Pulsed Magnetron, 6.3 V/1.5 A heater*'''2J61A''' – 60 W, 2.995-3.105 GHz Pulsed Magnetron, 6.3 V/1.5 A heater*'''2J62A''' – 60 W, 2.912-3.022 GHz Pulsed Magnetron, 6.3 V/1.5 A heater*'''2J64''' – 600 W, 1.4 GHz Pulsed Magnetron, 6.3 V/1.3 A heater*'''2J66''' (2.845-2.905 GHz), '''2J67''' (2.795-2.855 GHz), '''2J68''' (2.745-2.805 GHz), '''2J69''' (2.695-2.755 GHz) – 150 W Pulsed Magnetron, 6.3 V/1.5 A heater*'''2K40''' – 30 mW, 5-10 GHz Reflex Klystron, 6.3 V/330-390 mA heater, 3-pin ''PeeWee'' base*'''4B28''' – 300 V, 6 A Gas-filled half-wave rectifier, 2.2 V/17 A filament, E39 ''Mogul'' Edison screw lamp base with anode on top pin*'''152AVP''' – 10-stage head-on, S11 photomultiplier, Duodecal base*'''153AVP''' – 11-stage head-on, S11 photomultiplier, Diheptal 14-pin base*'''25B6-G''' (''5824'') – Power pentode*'''25B8-G''', '''25B8-GT''' – Triode + pentode*'''1L38''' = '''8047''' – 50 pF, 7.5 kV Vacuum capacitor*'''5513''' – 1.2 kW, 220 MHz Forced-air cooled, glass/metal, coaxial power triode, 6.3 V/30 A filament*'''5549''' – 4 kW, 50 MHz Forced-air cooled power triode, 12.6 V/57 A filament*'''5562''' – Power pentode, center-tapped 6 V heater, UX4 base with control grid on top pin*'''5610''' – Triode, 6.3 V/150 mA heater, Miniature 7-pin base*'''5635''' – Subminiature dual triode, 6.3 V/450 mA heater, all-glass round cross-section E8-10 envelope, circular 8-pin/wire-ends*'''5648''' – 100 W, 2.5 GHz ''Lighthouse''-type Power triode, 6.3 V/1.1 A heater*'''5655''' – 1.6" Image Orthicon, magnetic focus and deflection, 6.3 V/600 mA heater, Diheptal 14-pin base*'''5662''' – 2.25 A Triode thyratron for [[electric blanket]] controllers, 6.3 V/150 mA heater, Miniature 7-pin base*'''5663''' – Xenon tetrode thyratron, 6.3 V/150 mA heater, Miniature 7-pin base; similar to 5696/EN92, 546*'''5674''' – Directly heated dual, compensating [[electrometer]] [[Tetrode#Space charge grid tube|space charge grid tetrode]] for use in the 2 branches of a differential-in, differential-out bridge circuit, 3.8 V/90 mA filament, U6A base*'''5677''' – Subminiature UHF triode, 1.25 V/60 mA filament, all-glass elliptical cross-section envelope with 4 inline wire-ends*'''5697''' – Subminiature triode, 1.25 V/20 mA filament, all-glass elliptical cross-section envelope with 4 inline wire-ends*'''5721''' – 125 mW, 2.5-12 GHz Reflex Klystron, 6.3 V/580 mA heater, 4-pin ''PeeWee'' base with external-cavity contact rings and top cap*'''5779''' – Educational Ignitron with a glass envelope*'''5824''' – Premium version of 25B6-G*'''5975''' – Subminiature triode, 6.3 V/175 mA heater, all-glass elliptical cross-section envelope with 5 inline wire-ends*'''5980''' – Cartridge-type, self-quenched Geiger-Müller tube*'''6255B''' – 13-Stage, head-on, S13 (UV-sensitive) photomultiplier*'''6301''' – 9.28 GHz Reference microwave cavity*'''6452''' – 9.35 GHz Reference microwave cavity*'''6510''' – Pulse Magnetron*'''6705''' – Subminiature, sharp-cutoff pentode, 6.3 V/150 mA heater, all-glass round cross-section envelope, circular 8-pin/wire-ends*'''6792''' – 25 kV, 25 W Beam power pentode used as 10 mA shunt regulator, 6.3 V/450 mA heater, Octal base with anode on top cap*'''6800''' – 20 kW Water-cooled RF power triode, 7.5 V/100 A filament*'''6852''' – 3.3-4.9 GHz Gas-filled noise diode for use with a waveguide*'''6919''' – Dual diode used in computer equipment, 6.3 V/200 mA heater, Miniature 7-pin base*'''7006''' – Magnetron, 13.75 V/3.2 A heater*'''7036''' – 5915/EH960 Switching heptode with a different envelope*'''7043''' – High-vacuum, non-directional, S4 phototube, Octal base*'''7160''' – 4 kV, 40...500 µA Corona voltage-regulator tube, Miniature 7-pin base with anode on top cap*'''7163''' – Head-on, CdS S15 photoresistor (LDR)*'''7184''' – Ruggedized 6V6-GT beam power tetrode*'''7239''' – 2.2 kV, 4 W Beam power pentode used as shunt regulator, 6.3 V/300 mA heater, Noval base*'''7286''' – 2.7 kV, 35...700 µA Corona voltage-regulator tube, Miniature 7-pin base with anode on top cap*'''7410''' – Xenon thyratron*'''7427''' – 400 mW max., Side-on, CdS S15 photoresistor (LDR) for direct AC relay operation in street-light controls, Noval base*'''7716''' – Triode + pentode, 12-15 V/350 mA heater, Noval base*'''7996''' – 2.8 kV, 12 mA Ceramic/metal, gas-filled, cold cathode rectifier, cartridge-type*'''8070''', '''8071''' – Subminiature triode, 6.3 V/125 mA heater, all-glass round cross-section envelope, circular 8-pin/wire-ends*'''8102''' – Triode + pentode, 12-15 V/230 mA heater, Noval base*'''8103''' – Subminiature dual triode, 26.5 V/75 mA heater, all-glass round cross-section envelope, circular 8-pin/wire-ends*'''8185''' (6.3 V/300 mA heater), '''8185''' (26.5 V/75 mA heater) – Subminiature triode, all-glass round cross-section envelope, circular 8-pin/wire-ends*'''8210''' – Subminiature, sharp-cutoff pentode, 6.3 V/125 mA heater, all-glass round cross-section envelope, circular 8-pin/wire-ends with control grid on top pin/wire*'''8211''' – Subminiature video pentode, 6.3 V/360 mA heater, all-glass round cross-section envelope, circular 8-pin/wire-ends*'''8327''' – Power pentode, 6.3 V/760 mA heater, Noval base*'''8416''' – 6922/E88CC ruggedized, low-noise dual triode with a 12.6 V/150 mA heater, used in oscilloscope front ends*'''8509''' – Dual beam power tetrode, 2 V/3.4 A heater, Septar base with anodes on top pins*'''8595''' – Dual power tetrode, internally neutralized, center-tapped 6.3 V/600 mA heater, Noval base*'''8632''' – High-voltage power triode, 6.3 V/300 mA, Octal base with anode on top cap*'''8643''' – Dual beam power tetrode, 13.5 V/1 A filament, Septar base with anodes on top pins*'''8672''', '''8677''' (Triode) – ''Nuvistors''*'''8712''' – Ceramic/metal disk-seal planar UHF triode*'''8797''' – 900 V/10...550 µA Corona voltage-regulator tube, Miniature 7-pin base with anode on top cap*'''8802''' – Eimac 3-500Z with a Graphite anode*'''8843''', '''8894''' – Side-view, [[Seven-segment display|seven-segment]] vacuum fluorescent display, right decimal point, 1.5 V/40 mA filament, B10G Decar base (=Noval plus center pin)*'''8964''' = Eimac '''Y561''' – 100 W, 3 GHz Forced-air cooled, ceramic/metal, planar power triode*'''8965''' – Premium 2C39A*'''8980''' – ''Rocket''-type disk-seal planar UHF triode, 6.3 V/425 mA heater; supersedes 2C37*'''YD1100''' = '''8859''' – 7 GHz Contact/conduction-cooled ceramic/metal, disk-seal, coaxial power triode, 6.3 V/350 mA heater*'''YL1470''' = '''8888''' – Forced-air cooled, ceramic/metal, coaxial power tetrode, 6.3 V/120 A filament*'''XR1-12''' (5855) – 1.5 kV, 12.5 A Inert gas-filled triode thyratron with anode on top cap*'''5374''' – Heptode [[pentagrid converter]] with British grid topology, 6.3 V/300 mA heater, U7A base*'''917''' (Anode on top cap), '''919''' (cathode on top cap) – High-vacuum, side-on, S1 phototube, [[Soda–lime glass|lime glass]] envelope, maximum sensitivity at {{cvt|8000|+/-|1000|Å|nm|lk=on}} (IR/red), UX4 base*'''918''' – Gas-filled, side-on, S2 phototube, lime glass envelope, UX4 base with anode on top cap*'''921''' – Gas-filled, side-on, S1 phototube, cartridge type*'''922''' – High-vacuum, side-on, S2 phototube, lime glass envelope, cartridge type*'''923''' – Gas-filled, side-on, S2 phototube, lime glass envelope, UX4 base*'''924''' – 1P41 Gas-filled, head-on, S1 phototube with an E17 ''Intermediate'' [[Edison screw]] lamp base*'''925''' – High-vacuum, side-on, S1 phototube, short envelope, 5-pin Octal base*'''926''' – High-vacuum, side-on, S3 phototube for use in [[colorimetry]], maximum sensitivity at {{cvt|4200|+/-|1000|Å|nm|lk=off}}, cartridge type*'''927''' – Gas-filled, side-on, S1 phototube, 3-pin ''PeeWee'' base*'''928''' – Gas-filled, non-directional, S2 phototube, lime glass envelope, UX4 base*'''929''' – High-vacuum, side-on, S4 phototube, maximum sensitivity at {{cvt|4200|Å|nm|lk=off}} (violet), 5-pin Octal base*'''930''' – Gas-filled, side-on, S1 phototube, 5-pin Octal base*'''934''' – High-vacuum, side-on, S4 phototube, 3-pin Small-Shell ''PeeWee'' base*'''935''' – High-vacuum, side-on, S5 phototube, maximum sensitivity at {{cvt|3400|+/-|500|Å|nm|lk=off}} ([[Ultraviolet|UV-A]]), 4-pin Octal base*'''2C38''', '''2C39''' (Glass/metal), '''2C39A''', '''2C39B''', '''2C39BA''' = '''TD1-100C''' = '''EC562''' (ceramic/metal) – 100 W, 3 GHz ''Oil can''-type Forced-air cooled disk-seal power triode, 4.5-6.3 V/1.03 A heater; ruggedized version: ''2C39-WA''*'''9C24''' – 5 kW, 220 MHz Water-cooled, ceramic/metal VHF power triode used in grounded-grid amplifiers, 6.3 V/240 A filament; superseded by 6039*'''6279''' – Hydrogen triode thyratron, 6.3 V/10.6 A heater, Superjumbo Bayonet base with anode on top cap*'''6783''' – Gas/Mercury-vapor thyratron with negative control characteristic, 2.5 V/8.5 A filament*'''7088''' = '''YJ1030''' – Pulsed Magnetron, 5 V/500 mA heater*'''7235''' – Reduced-size 2C53 power triode*'''JP9-2.5''' = '''7028''' (9.345 to 9.405 GHz), '''JP9-2.5B''' = '''YJ1000''' (9.19 to 9.32 GHz), '''JP9-2.5D''', '''JP9-2.5E''' (9.415 to 9.475 GHz) – 3 kW Pulsed Magnetron*'''JP9-7A''' (9.21 to 9.27 GHz), '''JP9-7D''' (9.345 to 9.405 GHz) – 7 kW Pulsed Magnetron*'''JP9-50A''' = '''2J55''' – 9.345 to 9.405 GHz, 50 kW Forced-air cooled, pulsed Magnetron*'''JP9-75''' = '''6972''' – 9.345 to 9.405 GHz, 80 kW Forced-air cooled, pulsed Magnetron*'''JP9-80''' = '''2J52A''' – 9.345 to 9.405 GHz, 80 kW Forced-air cooled, pulsed Magnetron*'''JP9-250''' = '''4J50''' – 9.345 to 9.405 GHz, 225 kW Forced-air cooled, pulsed MagnetronSpin-tuned Magnetrons (having a {{Tooltip|spinner|fast-rotating structure}} which cyclically varies the coupling between cavities and thus the frequency, sweeping through the full tuning range back and forth sinusoïdally) for use in [[frequency agile]] radars or in [[barrage jamming]] systems, equipped with a [[Auxiliary power unit|115V/400Hz]] ([[avionics]] standard) [[synchronous motor]] effecting 16 sweep periods per revolution*'''JPS9-80C''' = '''YJ1170''' – 8.5 to 9.3 GHz, 70 kW Forced-air cooled, motor-tuned (Δf of 475 MHz in 500 µS), pulsed Magnetron*'''JPS9-200''' = '''YJ1180''' – 8.7 to 9.5 GHz, 180 kW Forced-air cooled, motor-tuned (Δf of 450 MHz in 500 µS), pulsed Magnetron*'''JPT9-60''' = '''2J51A''' – 8.5 to 9.6 GHz, 60 kW Forced-air cooled, mechanically tunable Magnetron*'''KS35-50''' – 31 to 36 GHz, 100 mW Reflex Klystron*'''LB3-250B''' – 2.7 to 3.3 GHz, 250 W Pulsed ''Forward-wave amplifier''*'''LB8-20''' = '''YH1080''' – 7.7 to 8.5 GHz, 16 W ''Forward-wave amplifier''*'''EZ-6E5''' = '''UZ-6E5''' = '''6E5''' – Top-view, "Magic Eye"-type tuning indicator 6.3 V/300 mA heater, U6A base*'''UF-134''' = '''UX-34''' = '''UX-134''' = '''34''' = '''RCA-234''' = '''CX-334''' – Directly heated remote-cutoff pentode, 2 V/60 mA filament, UX4 base with control grid on top cap*'''US-6J7''' = '''6J7''' – [[#Dual-control|{{color|Green|Dual-control}}]], sharp-cutoff RF pentode, 6.3 V/300 mA heater, Octal base with control grid on top cap*'''US-6K7''' = '''6K7''' – Dual-control, remote-cutoff RF pentode, 6.3 V/300 mA heater, 7-pin Octal base with control grid on top cap*'''UV-102''' – Directly heated triode, 2.0 V/750 mA filament, UV4 base*'''UX-12-A''' = '''12-A''' = '''UX-112-A''' = '''CX-112-A''' – Directly heated medium-μ triode, 5 V/250 mA filament, UX4 base*'''UX-30''' – Directly heated triode, 2 V/60 mA filament, UX4 base*'''UX-32''' = '''32''' = '''RCA-232''' = '''CX-332''' – Directly heated tetrode, 2 V/60 mA filament, UX4 base with control grid on top cap*'''UX-71-A''' = '''71-A''' = '''UX-171-A''' = '''CX-371-A''' – Directly heated power triode, 5 V/250 mA filament, UX4 base*'''UX-99''' = '''X99''' = '''UX-199''' – Directly heated low-μ triode, 3.3 V/60 mA filament, UX4 base*'''UY-169''' – Directly heated power pentode, 2 V/120 mA filament, UY5 base*'''UX-201-A''' = '''01-A''' – General-purpose low-μ triode, 5 V/250 mA filament, UX4 base*'''UX-226''' = '''26''' = '''CX-326''', '''UX-26-B''' – Directly heated medium-μ RF triode, 1.5 V/1.05 A filament, UX4 base*'''UY-247''' = '''47''' = '''RCA-247''' = '''C-347''' – Directly heated power pentode, 2.5 V/1.75 A filament, UY5 base*'''UY-233''' = '''33''' = '''RCA-233''' = '''C-333''' – Power pentode, 2 V/260 mA filament, UY5 base*'''UY-235''' = '''35/51''' = '''C-335''', '''UY-35-B''' – Remote-cutoff RF tetrode, 2.5 V/1.75 A heater, UY5 base; variant of the UY-224-A tetrode*'''UZ-42''' = '''42''' – Power pentode; 2A5 with a 6.3 V/700 mA heater*'''UZ-55''' = '''55''' – Dual diode + medium-μ triode, 2.5 V/1 A heater, U6A base*'''UZ-75''' = '''75''' – 6H6-type Dual diode + 6F5-type high-μ triode, 6.3 V/300 mA heater, U6A base*'''UZ-77''' = '''77''' – Sharp-cutoff pentode, 300 mA heater, U6A base*'''UZ-78''' = '''78''' – Remote-cutoff pentode, 6.3 V/300 mA heater, U6A base*'''UZ-79''' = '''79''' – Dual power triode, 6.3 V/600 mA heater, U6A base*'''UZ-89''' = '''89''' – 3.4 W Power pentode, 6.3 V/400 mA heater, U6A base*'''UZ-109''' – Directly heated dual triode, 1.1 V/100 mA filament, U6A base*'''UZ-2A5''' = '''2A5''' – Power pentode, 2.5 V/1.75 A heater U6A base*'''UZ-2A6''' = '''2A6''' – Dual diode + high-μ triode, 2.5 V/800 mA heater, U6A base with control grid on top cap*'''UZ-6C6''' = '''[[#6C6|{{color|Green|6C6}}]]''' – Dual-control, sharp-cutoff RF pentode, 6.3 V/300 mA heater, U6A base with control grid on top cap*'''UZ-6D6''' = '''[[#6D6|{{color|Green|6D6}}]]''' – Dual-control, remote-cutoff RF pentode, 6.3 V/300 mA heater, U6A base with control grid on top cap*'''3C6''' = [[#Lettered Loctal tubes used in Philco radios|{{color|Green|Philco '''XXB'''}}]] – Medium-μ dual triode, 50 resp. 100 mA filament, Loctal base*'''18GE6''', '''18GE6A''' – Dual diode + triode, 18 V heater, Miniature 7-pin base*'''20EQ7''' – 6EQ7 or 12EQ7 Diode + sharp-cutoff pentode with a 20 V heater*'''40FR5''' – AF Power pentode, 40 V heater, Miniature 7-pin base*'''50BM8/UCL82''' – [[#ECL82|{{color|Green|6BM8/ECL82}}]], 11BM8/LCL82, 16A8/PCL82 or 8B8/XCL82 AF Triode + AF power pentode with a 50 V heater*'''PT15''' – Directly heated RF Power pentode, 6.3 V/1.3 A filament, O5A European 5-pin base with anode on top cap*'''Kt-6H6-A''' – Dual diode, 6.3 V/300 mA heater, U7A base*'''KX-12-B''' – Directly heated half-wave rectifier 5.0 V/500 mA filament, UX4 base*'''KX-80-B''' – Directly heated half-wave rectifier 5.0 V/1.25 A filament, UX4 base*'''KX-202-A''' – Directly heated half-wave rectifier 7.5 V/1.25 A filament, UX4 base*'''KX-6901''' – Directly heated half-wave rectifier 2.5 V/5 A filament, UX4 base*'''UF-101''' = Grammont [[#Grammont1915|{{color|Green|'''TM'''}}]] – Directly heated triode, 80-135 V anode, 4.0 V/650 mA filament, European A4A base:*'''UF-101-A''' – UF-101 with a 350 V anode and a 5.0 V/600 mA filament*'''UF-109''' – Directly heated triode, 135 V anode, 1.1 V/60 mA filament*'''UF-111''' – Directly heated tetrode, 135 V anode, 1.1 V/60 mA filament*'''UG-6P7-G''' = '''6P7-G''' – Common cathode, triode/remote-cutoff pentode oscillator/mixer, 6.3 V/300 mA heater, Octal base*'''UN-100''' – Directly heated Audion triode, 2.0 V/1.0 A filament, screw/leads, Globe envelope*'''UN-109-C''' – Directly heated dual triode, 1.1 V/120 mA filament; two units of UX-109A*'''UN-554''' – ''Acorn'' VHF Pentode, 5.5 V/300 mA heater*'''UN-555''' – ''Acorn'' VHF Triode, 5.5 V/300 mA heater*'''UN-954''' = '''954''' – ''Acorn'' sharp-cutoff pentode*'''UN-955''' = '''[[955 acorn triode|955]]''' – ''Acorn'' triode*'''US-6305''' – VHF Pentode, 6.3 V/300 mA heater*'''US-6A8''' = '''6A8''' – [[Pentagrid converter]]*'''US-6F7-A''' = '''6F7A''' – Triode + pentode, 6.3 V/300 mA heater; Metal version of 6F7*'''US-6L7-G''' = '''6L7-G''' – Pentagrid converter, 6.3 V/300 mA heater, U7A base*'''Ut-6L7-G''' – Heptode pentagrid converter, 6.3 V/300 mA heater, U7A base*'''UX-10-A''' – Directly heated triode, 7.5 V/1.25 A filament, UX4 base*'''UX-31-A''' – Directly heated triode, 2.0 V/130 mA filament, UX4 base*'''UX-47-A''' (2.5 V/1.75 A filament), '''UX-47-C''' (5.0 V/500 mA filament) – Directly heated power pentode, UX4 base; similar to 47*'''UX-109''' (1.3 V/80 mA filament), '''UX-109-A''' (1.1 V/60 mA filament) – Directly heated triode, UX4 base*'''UX-110''' – Directly heated power triode, 1.3 V/160 mA filament, UX4 base*'''UX-111''', '''UX-111-B''' – Directly heated space-charge grid tetrode, 1.3 V/80 mA filament, UX4 base*'''UX-167''' – Sharp-cutoff RF pentode, UX4 base*'''UX-202-A''' – Directly heated power triode, 7.5 V/1.25 A filament, UX4 base*'''UX-6202''' – Directly heated RF tetrode, 1.9 V/50 mA filament, UX4 base*'''UY-6A3-B''' – Power triode, 6.3 V/1.6 A heater, UY5 base; indirectly heated variant of 2A3*'''UY-10-H''' – Triode, 6.3 V/800 mA heater, UY5 base*'''UY-11-A''' – Directly heated pentode, 1.1 V/60 mA filament, UY5 base*'''UY-35-B''' – Remote-cutoff RF tetrode, 2.5 V/1.75 A heater, UY5 base*'''UY-36-A''' – RF Tetrode, 6.3 V/300 mA heater, UY5 base*'''UY-37-A''' – Triode, 6.3 V/300 mA heater, UY5 base*'''UY-38-A''' – Power pentode, 6.3 V/300 mA heater, UY5 base*'''UY-39-A''' – RF Pentode, 6.3 V/300 mA heater, UY5 base*'''UY-45-H''' – Power triode, 6.3 V/800 mA heater, UY5 base; indirectly heated variant of 45*'''UY-46-C''' – Directly heated Class-B tetrode, 2.5 V/500 mA filament, UY5 base*'''UY-47''' = '''47''' = '''RCA-247''' = '''C-347''', '''UY-47-A''' (2.5 V/1.75 A filament), '''UY-47-B''' (2.5 V/500 mA filament) – 2.7 W Directly heated power pentode, UY5 base; 46 with a suppresser grid connected to a filament center-tap
*'''UY-56-A''' – Triode, 2.5 V/800 mA heater, UY5 base*'''UY-57-S''' – Pentode, 2.5 V/1.0 A heater, UY5 base*'''UY-76-A''' – Triode, 6.3 V/300 mA heater, UY5 base*'''UY-133''' (1.1 V/125 mA filament), '''UY-133-A''' (1.1 V/60 mA filament) – Directly heated power pentode, UY5 base*'''UY-224''' = '''24''' = '''C-324''', '''UY-224-A''' = '''24-A''' = '''C-324A''', '''UY-24-B''' – Sharp-cutoff tetrode, 2.5 V/1.75 A heater, UY5 base with control grid on top cap*'''UY-227''' = '''27''' = '''C-327''' (2.5 V/1.75 A heater), '''UY-27-A''' (2.5 V/1.5 A heater), '''UY-27-B''' (2.5 V/1.0 A heater) – Medium-μ triode, UY5 base*'''UY-536''' – Tetrode, 6.3 V/300 mA heater, UY5 base*'''UY-537''' – Triode, 6.3 V/300 mA heater, UY5 base*'''UY-538''' – Power pentode, 6.3 V/300 mA heater, UY5 base*'''UY-539''' – RF Pentode, 6.3 V/300 mA heater, UY5 base*'''UY-807''' = [[#807|{{color|Green|807}}]], '''UY-807-A''' (6.3 V/900 mA heater), '''UY-807-B''' (12.0 V/450 mA heater) – Transmitting beam power tetrode, UY5 base*'''UY-6301''' – Triode, 6.3 V/600 mA heater, UY5 base*'''Uy-11-M''' – Directly heated tetrode, 1.1 V/60 mA filament, Peanut 5-pin base*'''Uy-14-M''' – Directly heated RF pentode, 1.1 V/60 mA filament, Peanut 5-pin base*'''UZ-1C6-B''' – Directly heated pentagrid converter, 2.0 V/120 mA filament, U6A base*'''UZ-6L6-A''' – Beam power tetrode, 6.3 V/900 mA heater, U6A base; similar to 6L6-G*'''UZ-12-C''' – Directly heated dual triode, 5.0 V/500 mA filament, U6A base; Dual Unit of 12A*'''UZ-30-C''', '''UZ-30-MC''' – Directly heated dual triode, 2.0 V/120 mA filament, U6A base; dual unit of 30*'''UZ-31-MC''' – Directly heated dual power triode, 2.0 V/260 mA filament, U6A base; dual unit of 31*'''UZ-33-A''' – Directly heated dual triode, 2.0 V/260 mA filament, U6A base; Dual Unit of 33*'''UZ-47-D''' (5.0 V/500 mA filament), '''UZ-47-G''' (5.0 V/250 mA filament), '''UZ-47-H''' (5.0 V/1.65 A filament), '''UZ-47-K''' (5.0 V/500 mA filament) – Directly heated modulator pentode, U6A base*'''UZ-57-A''' – Pentode, 2.5 V/800 mA heater, U6A base*'''UZ-58-A''' – Remote-cutoff RF/IF pentode, 2.5 V/800 mA heater, U6A base*'''UZ-130-C''' – Directly heated dual triode, 1.1 V/240 mA filament, U6A base*'''UZ-133-D''' – Directly heated triode + pentode, 1.1 V/125 mA filament, U6A base*'''UZ-135''' – Directly heated pentagrid converter, 1.1 V/130 mA filament , U6A base*'''UZ-6001''' – Pentode, 6.3 V/300 mA heater, U6A base*'''UZ-6302''' – Video pentode, 6.3 V/600 mA heater, U6A base*'''UZ-6304''' – Power pentode, 6.3 V/700 mA heater, U6A base*'''1D-E14''' – Subminiature, directly heated bar-type tuning indicator, 1.4 V/200 mA filament*'''1D-K25''' – 6.5 kV<sub>PIV</sub> Subminiature, directly heated rectifier, 0.6 V/200 mA filament*'''1D-K27''' – 10 kV<sub>PIV</sub> Subminiature, directly heated rectifier, 0.7 V/200 mA filament*'''1D-K29''' – 9 kV<sub>PIV</sub> Subminiature, directly heated rectifier, 900 mV/200 mA filament*'''1E-DR1''' – Subminiature, directly heated diode + pentode, 1.25 V/25 mA filament*'''1E-R11''' – Subminiature, directly heated RF pentode, 1.25 V/25 mA filament*'''1E-R20''' – Subminiature, directly heated pentode, 1.25 V/10 mA filament*'''1R-K23''' = '''1S2A/DY87''' – 27 kV<sub>PIV</sub> CRT EHT Rectifier, 1.4 V/550 mA heater, Noval base, [[Silicone rubber|silicone]]-coated envelope to prevent [[Electrical breakdown|flush-over]] in high-humidity and low atmospheric-pressure conditions*'''1R-K31''' – 22 kV<sub>PIV</sub> Directly heated CRT EHT rectifier, 1.25 V/500 mA filament, Noval base*'''2D-H6''' – Subminiature VHF triode, 2.3 V/600 mA heater*'''2N-H12''' – ''[[Nuvistor]]'' triode*'''2X-L2A''' – Low-μ triode, UX4 base*'''3D-HH12''' – 6D-HH12 Dual RF triode with a different heater*'''3D-HH13''' – 6D-HH13 Dual RF triode with a different heater*'''3M-P26''' – Power pentode, Miniature 7-pin base; 4M-P26 with a 3.5 V/600 mA heater*'''3M-R24''' – Semiremote-cutoff RF pentode, 3.15 V/600 mA heater, Miniature 7-pin base*'''3M-R28''' – RF pentode, 3.15 V/300 mA heater, Miniature 7-pin base*'''3M-V7''' – Semiremote-cutoff RF pentode, 3.15 V/600 mA heater, Miniature 7-pin base*'''3W-C5''' – 6W-C5 Heptode pentagrid converter with a 2.5 V/1.0 A heater*'''3Z-P1''' – 6Z-P1 Power pentode with a 2.5 V/900 mA heater*'''3Z-DH3''', '''3Z-DH3A''' – 6Z-DH3, 6Z-DH3A Diode + triode with a 2.5 V/1.0 A heater*'''4D-H6''' – 6D-H6 RF Triode with a 4.3 V/300 mA heater*'''4D-HH13''' – 3D-HH13, 6D-HH13 Dual triode with a 4.6 V/450 mA heater*'''4M-P12''' – 6M-P12, 8M-P12, 9M-P12 AF Power pentode with a 4.7 V/600 mA heater*'''4M-P26''' – Power pentode; 3M-P26 with a 4.5 V/450 mA heater*'''4R-HH2''' – 6R-HH2, 17R-HH2 Dual VHF triode with a 4.2 V/600 mA heater*'''4R-HH6''' – Dual triode, 4.2 V/600 mA heater, Noval base*'''4R-HH8''' = '''4KN8''' – 6R-HH8 Dual VHF triode with a 4.2 V/600 mA heater*'''4R-HH9''' – 6R-HH9 Dual RF triode with a 4.2 V/600 mA heater*'''4R-HH15''' – 6R-HH15 Dual RF triode with a 4.2 V/600 mA heater*'''5G-K3''' – 1 kV<sub>PIV</sub> Half-wave rectifier, 5.0 V/700 mA heater, Octal base*'''5G-K4''' = '''5CG4''' – 1.4 kV<sub>PIV</sub> Half-wave rectifier 5.0 V/2.0 A heater, Octal base*'''5G-K18''' – 1.55 kV<sub>PIV</sub> Directly heated full-wave rectifier, 5.0 V/3.0 A filament, Octal base*'''5G-K20''' – 1 kV<sub>PIV</sub> Full-wave rectifier 5.0 V/1.9 A heater, Octal base*'''5G-K22''' – 1.55 kV<sub>PIV</sub> Full-wave rectifier 5.0 V/3.0 A heater, Octal base*'''5G-K24''' – 1.5 kV<sub>PIV</sub> Full-wave rectifier 5.0 V/1.9 A heater, Octal base*'''5M-HH3''' – 6M-HH3, 9M-HH3 Dual VHF triode with a 4.7 V/600 mA heater*'''5M-K9''' – 1 kV<sub>PIV</sub>, 60 mA Half-wave rectifier, 5.0 V/600 mA heater, Miniature 7-pin base*'''5R-K16''' – 1 kV, 2×75 mA Full-wave rectifier, 5 V/1.2 A heater, Noval base*'''5M-L8''' – UHF Oscillator triode, 4.7 V/300 mA heater, Miniature 7-pin base; similar to 6DZ4*'''5R-DDH1''' – Dual diode + triode, 4.7 V/600 mA heater, Noval base*'''5R-HR1''' – Triode + pentode, 5.3 V/600 mA heater, Noval base*'''5R-K16''' – 1 kV<sub>PIV</sub> Full-wave rectifier, 5.0 V/1.2 A heater, Noval base*'''6B-B14''' – CRT horizontal deflection beam power tetrode, 6.3 V/600 mA heater, Magnoval base*'''6B-B15''' – CRT horizontal deflection beam power tetrode, 6.3 V/1.2 A heater*'''6C-A10''' – 30 W ''[[Compactron]]'' AF Power triode, 6.3 V/1.5 A heater*'''6D-H6''' – Subminiature RF triode; 4D-H6 with a 6.3 V/200 mA heater*'''6D-H8''', '''6D-H9''' – Subminiature triodes, 6.3 V/150 mA heater*'''6D-HH12''' – Subminiature dual RF triode with a base anticipating the Nuvistor; 3D-HH12 with a 6.3 V/300 mA heater*'''6D-HH13''' – Subminiature dual triode with a base anticipating the Nuvistor, for use as cascode; 3D-HH13, 4D-HH13 with a 6.3 V/300 mA heater*'''6G-A4''' – Power triode, 6.3 V/750 mA heater, Octal base*'''6G-B3A''' – 13 W CRT horizontal deflection beam power tetrode, Octal base; 12G-B3A, 17G-B3A with a 6.3 V/1.2 A heater*'''6G-B6''' – CRT horizontal deflection beam power tetrode, Octal base; 12G-B6, 25G-B6 with a 6.3 V/1.2 A heater*'''6G-B7''' – 15 W CRT horizontal deflection beam power tetrode, Octal base; 12G-B7 with a 6.3 V/1.2 A heater*'''6G-B8''' – Beam power tetrode, 6.3 V/1.5 A heater, Octal base*'''6G-B9''' – CRT horizontal deflection beam power tetrode, 6.3 V/1.2 A heater, Octal base*'''6G-B13''' – Beam power tetrode, Octal base; 50G-B13 with a 6.3 V/1.2 A heater*'''6G-C5''' – Heptode pentagrid converter, 6.3 V/300 mA heater, Octal base; similar to 6SA7-GT*'''6G-DE2''' – Diode + tuning indicator, 6.3 V/300 mA heater, Octal base*'''6G-E7''' = '''6DL7''' – Sharp + remote-cutoff tuning indicator, 6.3 V/300 mA heater, Octal base*'''6G-E12A''' – 2-channel "Magic Eye"-type [[Magic eye tube|tuning indicator]], rectangular target, 6.3 V/300 mA heater, Octal base*'''6G-H4''' – CRT EHV Shunt regulator power triode, 6.3 V/200 mA heater, Octal base, considerable [[X-ray tube#Hazards of X-ray production from vacuum tubes|X-radiation]]*'''6G-H7''' – CRT EHV Shunt regulator power triode, 6.3 V/200 mA heater, Octal base, considerable X-radiation*'''6G-K17''' – CRT horizontal deflection output booster/damper/efficiency diode, Octal base; 12G-K17 with a 6.3 V/1.3 A heater*'''6G-R7''' – Semiremote-cutoff pentode, 6.3 V/300 mA heater, Octal base*'''6H-B26''' – 18 W AF Beam power tetrode, 6.3 V/1.25 A heater, Magnoval base*'''6M-DE1''' – Diode + "Magic Eye"-type tuning indicator, 6.3 V/150 mA heater, Miniature 7-pin base*'''6M-E2''' – Tuning indicator, 6.3 V/300 mA heater, Miniature 7-pin base*'''6M-E4''' – "Magic Finger"-type tuning indicator, 6.3 V/200 mA heater, Miniature 7-pin base*'''6M-E5''' = '''6ME5''' – "Magic Eye"-type tuning indicator, 6.3 V/150 mA heater, Miniature 7-pin base; similar to 6E5-M*'''6M-E10''' – "Magic Eye"-type tuning indicator, 6.3 V/150 mA heater, Miniature 7-pin base*'''6M-H1''' – VHF Triode, 6.3 V/400 mA heater, Miniature 7-pin base*'''6M-HH3''' – Dual VHF triode for use as oscillator/mixer in TV receivers, Miniature 7-pin base; 5/9M-HH3 with a 6.3 V/450 mA heater*'''6M-L2''' – VHF Triode, 6.3 V/175 mA heater, Miniature 7-pin base*'''6M-L3''' – UHF Triode, 6.3 V/175 mA heater, Miniature 7-pin base*'''6M-P12''' – Power pentode, Miniature 7-pin base; 4M-P12, 8M-P12, 9M-P12 with a 6.3 V/450 mA heater*'''6M-P17''' – Power pentode, 6.3 V/500 mA heater, Miniature 7-pin base*'''6M-P20''' – Power pentode, 6.3 V/600 mA heater, Miniature 7-pin base*'''6M-R25''' – Pentode, Miniature 7-pin base; 12M-R25 with a 6.3 V/300 mA heater*'''6M-R26''' – AF Pentode, Miniature 7-pin base; 12M-R26 with a 6.3 V/300 mA heater*'''6N-H10''' – ''Nuvistor'' UHF Triode, 6.3 V/120 mA heater*'''6R-A2''' – Power triode, 6.3 V/760 mA heater, Noval base, now popular for ''[[output transformerless]]'' audio amplifiers*'''6R-A3''' – Power triode for use as series regulator in DC power supplies, 6.3 V/1.0 A heater, Noval base*'''6R-A5''' – Power triode for use as series regulator in DC power supplies, 6.3 V/1.0 A heater, Noval base*'''6R-A6''' – CRT Vertical deflection power triode, 6.3 V/900 mA heater, Noval base *'''6R-A8''' – AF Power triode, 6.3 V/1.0 A heater, Noval base*'''6R-A9''' – CRT Vertical deflection power triode, 6.3 V/600 mA heater, Noval base*'''6R-AL1''' – Dual dissimilar CRT vertical deflection triode, 6.3 V/860 mA heater, Noval base*'''6R-AL2''' – Dual dissimilar CRT vertical deflection triode, 6.3 V/900 mA heater, Noval base*'''6R-B10''' – Beam power tetrode, 6.3 V/1.0 A heater, Noval base*'''6R-B11''' – CRT Vertical deflection beam power tetrode, Noval base; 8R-B11 with a 6.3 V/800 mA heater*'''6R-B12''' – CRT horizontal deflection beam power tetrode, Noval base; 12R-B12 with a 6.3 V/600 mA heater*'''6R-DDP1''' – Dual diode + power pentode, 6.3 V/750 mA heater, Noval base*'''6R-DHV1''' – Diode + triode + remote-cutoff pentode, Noval base; 20R-DHV1 with a 6.3 V/480 mA heater*'''6R-DHV2''' – Diode + triode + remote-cutoff pentode, 6.3 V/500 mA heater, Noval base*'''6R-E13''' – Side-view, band-type tuning/level indicator, 6.3 V/200 mA heater, Noval base*'''6R-EE1''' – Dual tuning indicator, 6.3 V/200 mA heater, Noval base *'''6R-H2''' – Triode for use in grounded-grid amplifiers, 6.3 V/300 mA heater, Noval base*'''6R-HH1''' – Dual triode for use in a cascode, 6.3 V/400 mA heater, Noval base*'''6R-HH2''' – Dual VHF triode for use in a cascode, 6.3 V/400 mA heater, Noval base; 4/17R-HH2 with a 6.3 V/400 mA heater*'''6R-HH8''' = '''6KN8''' – Dual semiremote-cutoff VHF triode for use in a cascode, Noval base; 4R-HH8 with a 6.3 V/400 mA heater*'''6R-HH9''' – Dual RF triode, Noval base; 4R-HH9 with a 6.3 V/400 mA heater*'''6R-HH15''' – Dual RF triode, Noval base; 4R-HH15 with a 6.3 V/300 mA heater*'''6R-HP2''' – Triode + pentode, Noval base; 8R-HP2, 32R-HP2 with a 6.3 V/780 mA heater*'''6R-HP3''' – Triode + pentode, Noval base; 8R-HP3, 10R-HP3 with a 6.3 V/750 mA heater*'''6R-HV1''' – Triode + remote-cutoff pentode, 6.3 V/500 mA heater, Noval base*'''6R-K19''' = '''6BR3''' – CRT horizontal deflection output booster/damper/efficiency diode, Noval base; 12R-K19 with a 6.3 V/1.2 mA heater*'''6R-P10''' – Power pentode, 6.3 V/500 mA heater, Noval base*'''6R-P15''' – Power pentode, 6.3 V/750 mA heater, Noval base*'''6R-P22''' – Power pentode, 6.3 V/600 mA heater, Noval base*'''6R-R8''', '''6R-R8C''' – Wide-band pentode, 6.3 V/300 mA heater, Noval base*'''6R-R21''' – Wide-band tetrode, 6.3 V/300 mA heater, Noval base*'''6W-C5''' – Heptode pentagrid converter; 12W-C5 with a 6.3 V/300 mA heater, U7A base*'''6Z-1V''', '''6Z-3V''', '''6Z-AM1''' – Pentodes, 6.3 V/300 mA heater, U6A base; similar to 6C6*'''6Z-DH3''', '''6Z-DH3A''' – Diode + triode, 6.3 V/300 mA heater, U6A base*'''6Z-E1''' – Tuning indicator, 6.3 V/300 mA heater, U6A base; similar to 6E5*'''6Z-E3''' – Tuning indicator, 6.3 V/300 mA heater, U6A base; similar to 6E5*'''6Z-E11''' – Tuning indicator, 6.3 V/150 mA heater, U6A base*'''6Z-P1''' – Power pentode, 6.3 V/300 mA heater, U6A base*'''7M-P18''', '''7M-P18A''' – Power pentode, 7.5 V/600 mA heater, Miniature 7-pin base*'''7M-R29''' – RF Pentode, 6.75 V/140 mA heater, Miniature 7-pin base*'''7N-R30''' – ''Nuvistor'' Tetrode, 6.75 V/140 mA heater*'''7R-P22''' – 9R-P22 Color signal recovery pentode with a 6.7 V/600 mA heater*'''8M-B20''' – CRT Vertical deflection beam power tetrode, 8.0 V/600 mA heater, Miniature 7-pin base*'''8M-P12''' – 6M-P12, 9M-P12 Power pentode with a 8.5 V/300 mA heater*'''8R-A7''' – CRT Vertical deflection power triode, 8.0 V/600 mA heater, Noval base*'''8R-B11''' – 6R-B11 CRT Vertical deflection beam power tetrode with a 8.5 V/600 mA heater*'''8R-HP3''' – 6R-HP3, 10R-HP3 Sync sep triode + pentode with a 8.0 V/600 mA heater*'''8R-LP1''' – Vertical deflection triode + pentode, 8.0 V/600 mA heater, Noval base*'''9M-HH3''' – 5M-HH3, 6M-HH3 Dual VHF triode with a 9.5 V/300 mA heater*'''9M-P12''' – 4M-P12, 6M-P12, 8M-P12 Power pentode with a 9.4 V/300 mA heater*'''9R-A6''' – 6R-A6 Power triode with a 9.5 V/600 mA heater*'''9R-AL1''' – 6R-AL1 Dual triode with a 9.0 V/600 mA heater*'''9R-P22''' – 7R-P22 TV Color matrix pentode with a 9.0 V/450 mA heater*'''10R-AL2''' – 6R-AL2 Dual triode with a 9.7 V/600 mA heater*'''10R-HP3''' – 6R-HP3, 8R-HP3 Sync sep triode + pentode with a 10.5 V/450 mA heater*'''11C-HHP1''' – ''Compactron'' Dual triode + pentode, 11.0 V/600 mA heater*'''12B-B14''' – 6B-B14, 17B-B14, 25B-B14 CRT horizontal deflection beam power tetrode with a 12.6 V/600 mA heater*'''12G-B3''', '''12G-B3A''' – CRT horizontal deflection beam power tetrode, 12.6 V/600 mA heater, Octal base*'''12G-B3A''' – 6G-B3A, 17G-B3A CRT horizontal deflection beam power tetrode with a 12.6 V/600 mA heater*'''12G-B6''' – 6G-B6, 25G-B6 CRT horizontal deflection beam power tetrode with a 12.6 V/600 mA heater*'''12G-B7''' – 6G-B7 CRT horizontal deflection beam power tetrode with a 12.6 V/600 mA heater*'''12G-C4''' – Triode/hexode mixer, 12.6 V/300 mA heater*'''12G-C5''' – Heptode pentagrid converter, 12.0 V/175 mA, Octal base; similar to 12SA7-GT*'''12G-DH3''' – Dual diode + triode, 12.0 V/175 mA heater, Octal base; similar to 6Z-DH3/A*'''12G-DH4''' – Dual diode + triode, 12.6 V/200 mA heater, Octal base*'''12G-K10''' – Full-wave rectifier, 12.6 V/300 mA heater, Octal base*'''12G-K17''' – 6G-K17 CRT horizontal deflection output booster/damper/efficiency diode with a 12.6 V/600 mA heater*'''12G-P7''' – Power pentode, 12.6 V/300 mA heater, Octal base*'''12G-R4''' – Pentode, 12.6 V/200 mA heater, Octal base*'''12G-R6''' – Pentode, 12.0 V/175 mA heater, Octal base*'''12G-V3''' – Remote-cutoff RF pentode, 12.6 V/200 mA heater, Octal base*'''12M-R25''' – 6M-R25 AF pentode with a 12.6 V/150 mA heater*'''12M-R26''' – 6M-R26 AF pentode with a 12.6 V/150 mA heater*'''12R-B12''' – 6R-B12 CRT horizontal deflection beam power tetrode with a 12.6 V/300 mA heater*'''12R-K19''' = '''12BR3''' – 6R-K19 CRT horizontal deflection output booster/damper/efficiency diode with a 12.6 V/600 mA heater*'''12R-K21''' – CRT horizontal deflection output booster/damper/efficiency diode, 12.6 V/300 mA heater, Noval base*'''12R-LL3''' – Dual triode, center-tapped 6.3 V/450 mA resp. 12.6 V/225 mA heater, Noval base*'''12W-C1''' – Heptode pentagrid converter, 12.0 V/150 mA heater, U7A base*'''12W-C5''' – 6W-C5 Heptode pentagrid converter with a 12.0 V/175 mA heater*'''12X-K1''' – Half-wave rectifier, 12.0 V/150 mA heater, UX4 base, UY5 base*'''12Y-L1''' – Triode, 12.0 V/150 mA heater, UY5 base*'''12Y-R1''' – Pentode, 12.0 V/150 mA heater, UY5 base*'''12Y-V1''' – Remote-cutoff RF pentode, 12.0 V/150 mA heater, UY5 base*'''12Y-V1A''' – Remote-cutoff RF pentode, 12.0 V/175 mA heater, UY5 base*'''12Z-DH1''' – Dual diode + triode, 12.0 V/150 mA heater, U6A base*'''12Z-DH3A''' – Diode + triode, 12.0 V/175 mA heater, U6A base*'''12Z-E6''' – Tuning indicator, 12.6 V/150 mA heater, U6A base*'''12Z-E8''', '''12Z-E9''' – Tuning indicators, 12.6 V/150 mA heater, U6A base*'''12Z-P1''' – 6Z-P1 Power pentode with a 12.0 V/150 mA heater*'''12Z-P1A''' – 6Z-P1 Power pentode with a 12.0 V/175 mA heater*'''15M-P19''' – Power pentode, 15.0 V/300 mA heater, Miniature 7-pin base*'''16G-B16''' – CRT horizontal deflection beam power tetrode, 16.0 V/600 mA heater, Octal base*'''17G-B3''' – 6G-B3, 12G-B3 CRT horizontal deflection beam power tetrode with a 16.8 V/450 mA heater*'''17R-HH2''' – Dual VHF triode for use in cascode amplifiers, 17.0 V/150 mA heater, Noval base*'''17R-K19''' = '''17BR3''' – CRT horizontal deflection output booster/damper/efficiency diode, Noval base*'''19M-R10''' – Pentode, 19.0 V/100 mA heater, Miniature 7-pin base*'''19R-LL1''' – Dual triode, 19.0 V/150 mA heater, Noval base*'''19R-P11''' – Power pentode, 19.0 V/200 mA heater, Noval base*'''20G-B19''' – CRT horizontal deflection beam power tetrode, 20.0 V/300 mA heater, Octal base; similar to 6BQ6-GTB*'''20R-DHV1''' – 6R-DHV1 Diode + triode + remote-cutoff pentode with a 20.0 V/150 mA heater*'''24Z-K2''' – Dual rectifier with separate cathodes for use as [[voltage doubler]], 24.0 V/150 mA heater, U6A base*'''25B-B14''' – 6B-B14, 12B-B14, 17B-B14 CRT horizontal deflection beam power tetrode with a 25.0 V/300 mA heater*'''25G-B6''' – 6B-B6, 12B-B6 CRT horizontal deflection beam power tetrode with a 25.0 V/300 mA heater*'''25M-K15''' – Half-wave rectifier, 25.0 V/150 mA heater, Miniature 7-pin base *'''25M-P20''' – Power pentode, 25.0 V/150 mA heater, Miniature 7-pin base*'''25R-K19''' = '''25BR3''' – CRT horizontal deflection output booster/damper/efficiency diode, Noval base*'''28R-HV2''' – Triode + semiremote-cutoff pentode, 28.0 V/100 mA heater, Noval base*'''30G-K5''' – 570 V<sub>PIV</sub> Half-wave rectifier, 30.0 V/175 mA heater, Octal base*'''30G-P9''' – Power pentode, 30.0 V/175 mA heater, Octal base*'''30M-P23''' – Power pentode, 30.0 V/150 mA heater, Miniature 7-pin base*'''30M-P27''' – Power pentode, 30.0 V/150 mA heater, Miniature 7-pin base*'''32R-HP2''' – 6P-HP2, 8P-HP2 Triode + pentode with a 32.0 V/150 mA heater, Noval base*'''35M-P14''' – Power pentode, 35.0 V/150 mA heater, Miniature 7-pin base*'''36Z-K12''' – Dual rectifier for use as voltage doubler, 36.0 V/175 mA heater, U6A base*'''45M-P21''' – Power pentode, 45.0 V/100 mA heater, Miniature 7-pin base*'''50C-A10''' – 30 W ''Compactron'' AF Power triode, 50 V/175 mA heater*'''50H-B26''' – 18 W AF Beam power tetrode, 50 V/150 mA heater, Magnoval base*'''50R-P25''' – Power pentode, 50.0 V/150 mA heater, Noval base*'''50R-P28''' – Power pentode, 50.0 V/150 mA heater, Noval base*'''1G32P''', '''1G35P''' = '''4C35''', '''1G45P''' = '''3C45''' – Hydrogen thyratrons*'''1W80''' – Traveling-wave tube*'''2B33''' – 25 W, 60 MHz Beam power tetrode*'''2G22P''' = '''5C22''' – Hydrogen thyratron*'''2M21''', '''2M51''', '''2M53''', '''2M66''', '''2M69''', '''2M89''' – [[ISM radio band|2450 MHz]] Magnetron*'''3G49P''' = '''5949''' – Hydrogen thyratron*'''4B38''' – 10 MHz Beam power tetrode, 6.3 V/4.8 A heater, UY5 base*'''4G48P''' = '''5948''' – Hydrogen thyratron*'''4P55''' – 120 W, 25 MHz Power pentode, 6.3 V/2.6 A heater, UY5 base*'''5F60R''' – 450 W, 500 MHz Power tetrode*'''6AV60''' – 3 kW, 6.325-6.425 GHz, 4-cavity Klystron*'''7F64R''' – 4 kW, 250 MHz Coaxial power tetrode, 6.0 V/68 A heater*'''7F71RA''' – 3.5 kW, 250 MHz Coaxial power tetrode, 4.0 V/78 A heater*'''8F76R''' – 15 kW, 250 MHz Coaxial power tetrode, 7.5 V/120 A heater*'''8T33''' (Water-cooled), '''8T39''' (Water/vapor-cooled) – 10 kW, 250 MHz Power triode, 7.5 V/60 A filament*'''9T40''' – 150 kW, 2 MHz Water/vapor-cooled power triode, 18 V/315 A filament*'''1DY4''' – 6DY4 UHF frame-grid triode with a 1.6 V heater*'''ГД-50''' ⟼ '''GD-50''' – Longwave power triode, 11 V/4.1 A filament<ref>[https://www.radiomuseum.org/tubes/tube_gd50.html ГД-50 on radiomuseum.org]</ref>*'''ГД-100''' ⟼ '''GD-100''' – Longwave power triode, 11 V/3.8 A filament*'''ГД-200''' ⟼ '''GD-200''' – Longwave power triode, 11 V/6.4 A filament*'''ГД-400''' ⟼ '''GD-400''' – Longwave power triode, 17 V/8.5 A filament{{pb}}'''Note:''' ГД402, ГД507 are solid state diodes*'''ГК-5А''' ⟼ '''GK-5A''' – 200 W, 26 MHz Directly heated, glass/metal power triode*'''ГК-9Б''', '''ГК-9П''' ⟼ '''GK-9B''' (Forced-air cooled, 18 kW), '''GK-9P''' (Water/vapor-cooled, 25 kW) – 2 MHz Directly heated, glass/metal power triode*'''ГК-11П''' ⟼ '''GK-11P''' – 120 kW, 30 MHz Water/vapor-cooled, ceramic/metal, directly heated, linear power tetrode*'''ГК-12А''' ⟼ '''GK-12A''' – 25 kW, 30 MHz Water-cooled, ceramic/metal, directly heated power triode, magnetically-focused electron flux, for use as oscillator or amplifier in dielectric heating equipment*'''ГК-71''' ⟼ '''GK-71''' – 125 W, 20 MHz Directly heated power pentode for use as oscillator or amplifier*'''ГМ-1А''', '''ГМ-1П''' ⟼ '''GM-1A''' (Water-cooled, 30 kW), '''GM-1P''' (Water/vapor-cooled, 35 kW) – Water-cooled, glass/metal, directly heated AF/modulator power triode*'''ГМ-2А''', '''ГМ-2Б''' ⟼ '''GM-2A''' (Liquid-cooled), '''GM-2B''' (Forced-air cooled) – 3.5 kW Glass/metal, directly heated AF/modulator power triode*'''ГМ-3А''', '''ГМ-3Б''', '''ГМ-3П''' ⟼ '''GM-3A''' (Water-cooled, 7.5 kW), '''GM-3B''' (Forced-air cooled, 7.5 kW), '''GM-3P''' (Water/vapor-cooled, 10 kW) – Glass/metal, directly heated AF/modulator power triode*'''ГМ-4Б''' ⟼ '''GM-4B''' – 9 kW Forced-air cooled, glass/metal, directly heated AF/modulator power tetrode*'''ГМ-5Б''' ⟼ '''GM-5B''' – 300 W Forced-air cooled, ceramic/metal, half-indirectly heated AF/modulator power triode*'''ГП-5''' ⟼ '''GP-5''' – 30 kV Indirectly heated beam power triode, Magnoval base*'''ГУ-100А''', '''ГУ-100Б''' ⟼ '''GU-100A''' (Water-cooled), '''GU-100B''' (Forced-air cooled) – 6 kW Ceramic/metal, directly heated RF power triode*'''3-500Z''' – 500 W, 110 MHz Glass power triode with anode on top cap, 5 V/14.5 A filament*'''3CV1500A7''' – 1.5 kW Water/vapor cooled variant of the 3CX1000A7*'''3CV30000A3''', '''3CV30000H3''' (with flexible filament leads) – 30 kW, 100 MHz Water/vapor cooled, ceramic/metal power triode, 6.3 V/152-172 A filament:*'''3CW5000H3''' – 75 MHz, Medium-μ with flexible filament leads*'''3CW10000H3''' – 10 kW, 90 MHz Water-cooled, ceramic/metal medium-μ power triodes, 7.5 V/75 A filament with flexible filament leads*'''3CW20000'''s – 20 kW Water-cooled, ceramic/metal power triodes, 7.5 V/100 A filament:*'''3CW20000A1''' – 110 MHz, Low-μ:*'''3CW20000A3''' – 140 MHz, Medium-μ:*'''3CW20000A7''' – 140 MHz, High-μ:*'''3CW20000H3''' – 90 MHz, Medium-μ, flexible filament leads:*'''3CW20000H7''' – 110 MHz, High-μ, flexible filament leads*'''3CW25000A3''' – 25 kW, 100 MHz Water-cooled, ceramic/metal medium-μ power triodes, 6.3 V/152-172 A filament*'''3CW30000H3''' (Medium-μ), '''3CW30000H7''' (High-μ) – 30 kW, 90 MHz Water-cooled, ceramic/metal power triodes, 6.3 V/152-172 A filament*'''3CX300A1''' – 300 W Forced-air cooled, ceramic/metal, low-μ power triode, 6.3 V/2.65 A heater*'''3CX800A7''' – 800 W, 350 MHz Forced-air cooled, ceramic/metal, high-μ power triode, 13.5 V/1.5 A heater*'''3CX1000A7/8283''' – 1 kW, 220 MHz Forced-air cooled, ceramic/metal, high-μ power triode, 5 V/30.5 A filament*'''3CX3000A7''' (110 MHz), '''3CX3000F7''' (30 MHz, with flexible grid and filament leads) – 3 kW Forced-air cooled, ceramic/metal high-μ power triode, 7.5 V/50.5-51.5 A filament*'''3CX4500F3''' – 4.5 kW, 75 MHz Forced-air cooled, ceramic/metal medium-μ power triode, 7 V/78 A filament with flexible leads*'''3CX5000A7''', '''3CX5000H3''' (with flexible filament leads) – 5 kW, 75 MHz Forced-air cooled, ceramic/metal high-μ power triode, 10 V/17.5 A filament:*'''3CX10000A3/8159''' – Medium-μ, 140 MHz, for use as self-excited high-power oscillator in [[induction heating]] equipment:*'''3CX10000A7/8160''' = Siemens '''RS2015CL''' – High-μ, 110 MHz:*'''3CX10000H3''' – Medium-μ, with flexible filament leads*'''3CX10000U7''' – 10 kW, 260 MHz Forced-air cooled, ceramic/metal, coaxial, high-μ power triode, 15 V/3.5 A heater*'''3CX15000A3''' (Low-μ, 100 MHz), '''3CX15000A7''' (Medium-μ, 110 MHz), '''3CX15000H3''' (Low-μ, 90 MHz, with flexible filament leads) – 15 kW Forced-air cooled, ceramic/metal power triode, 6.3 V/160 A filament*'''3CX20000A3''' (Low-μ, 90 MHz), '''3CX20000A7''' (Medium-μ, 110 MHz), '''3CX20000H3''' (Low-μ, 90 MHz, with flexible filament leads) – 20 kW Forced-air cooled, ceramic/metal power triode, 10 V/160 A filament*'''3W5000'''s – 5 kW, 75 MHz Water-cooled, glass power triode, 7.5 V/40-54 A filament:*'''3W5000A1/8240''' – Low-μ:*'''3W5000A3/8242''' – Medium-μ:*'''3W5000F1/8241''' – Low-μ, with flexible filament leads:*'''3W5000F3/8243''' – Medium-μ, with flexible filament leads*'''3X100A5''' – Factory stress-tested 2C39A*'''3X2500A3''' (75 MHz), '''3X2500F3/8251''' (30 MHz, with flexible grid and filament leads) – 2.5 kW Forced-air cooled, glass low-μ power triode, 7.5 V/51 A filament*'''3X3000A1/8238''' (AF, Low-μ), '''3X3000A7''' (AF/RF, Medium-μ), '''3X3000F1/8239''' (AF, Low-μ, with flexible grid and filament leads) – 3 kW Forced-air cooled, glass power triode, 7.5 V/51 A filament*'''3X12500A3''' – 12.5 kW, 110 MHz Forced-air cooled, glass low-μ power triode, 7.5 V/192 A filament*'''4-500A''' – 500 W, 110 MHz Glass radial-beam power tetrode, 10 V/10.2 A filament*'''4CN15A''' – 15 W<sub>avg</sub> Coolerless variant of the 4CX300A/8167 for low duty or pulse service, but may be operated immersed in a liquid coolant*'''4CS100L''' – 100 W, 250 MHz Contact/conduction-cooled, ceramic/metal power tetrode + control diode to monitor the emission of the quickstart 2.1 V/7.15-8.10 A filament*'''4CS250R''' – 250 W, 500 MHz Ruggedized, contact/conduction-cooled, ceramic/metal power tetrode with a [[Beryllium oxide|Beryllia]] heat sink coupler, quickstart 6.0 V/2.6 A filament*'''4CV8000A''' – 8 kW, 150 MHz Water/vapor cooled, ceramic/metal power tetrode, 9 V/41.5 A filament*'''4CV20000A''' – 20 kW, 30 MHz Water/vapor cooled, ceramic/metal power tetrode, 7.5 V/73-78 A filament*'''4CV35000A''' – 35 kW, 110 MHz Water/vapor cooled, ceramic/metal power tetrode, 6.3 V/152-168 A filament*'''4CV50000E''', '''4CV50000J''' – 50 kW, 110 MHz Water/vapor cooled, ceramic/metal power tetrode, 12 V/220 A filament*'''4CV75000A''' – 75 kW, 30 MHz Water/vapor cooled, ceramic/metal power tetrode, 10 V/300 A filament*'''4CV100000C/8351''' – 100 kW, 30 MHz Water/vapor cooled, ceramic/metal power tetrode, 10 V/300 A filament*'''4CV250000''' (30 MHz, 12.0 V/640 A filament), '''4CV250000A''' (30 MHz, 12.0 V/660 A filament), '''4CV250000B''' (50 MHz, 12.0 V/660 A filament) – 250 kW Water/vapor cooled, ceramic/metal power tetrode*'''4CW800B''' (6.0 V/4.4 A heater), '''4CW800F''' (26.5 V/1.1 A heater) – 800 W, 800 MHz Water-cooled, ceramic/metal power tetrode*'''4CW10000A''' – 10 kW, 110 MHz Water-cooled, ceramic/metal power tetrode, 7.5 V/73-78 A filament*'''4CW25000A''' – 25 kW, 110 MHz Water-cooled, ceramic/metal power tetrode, 6.3 V/160 A filament*'''4CW50000C/8350''' (30 MHz, 10 V/300 A filament), '''4CW50000E''' (110 MHz, 12 V/220 A filament), '''4CW50000J''' (110 MHz, 12 V/220 A filament) – 50 kW Water-cooled, ceramic/metal power tetrode*'''4CW100000D''' (30 MHz, 10 V/295 A filament), '''4CW100000E''' (110 MHz, 15.5 V/215 A filament), '''4CW100000G''' (110 MHz, 15.0 V/170 A filament) – 100 kW Water-cooled, ceramic/metal power tetrode*'''4CW150000E''' – 150 kW, 110 MHz Water-cooled, ceramic/metal power tetrode, 15.5 V/215 A filament*'''4CW250000A''', '''4CW250000B''', '''4CW250000V''' – Water-cooled variants of 4CV250000A, 4CV250000B*'''4CX125C''' (6.0 V/2.6-3.1 A heater), '''4CX125F''' (26.5 V/600-700 mA heater) – 125 W, 500 MHz Forced-air cooled, ceramic/metal radial-beam power tetrode:*'''4CX600A''' – 1.3 GHz, 6.0 V/4.8 A heater:*'''4CX600B''' – 500 MHz, 6.0 V/4.3 A heater for use in [[Distributed amplifier|distributed wideband amplifiers]]:*'''4CX600F''' – 500 MHz, 26.5 V/1.05 A heater for use in distributed wideband amplifiers*'''4CX1500A''' (150 MHz, 5.0 V/38.5 A filament), '''4CX1500B/8660''' (6.0 V/9-11 A filament) – 1.5 kW Forced-air cooled, ceramic/metal radial-beam power tetrode*'''4CX3500A''' – 3.5 kW, 220 MHz Forced-air cooled, ceramic/metal radial-beam power tetrode, 5.0 V/90 A filament*'''4CX7500A''' – 7.5 kW, 220 MHz Forced-air cooled, ceramic/metal radial-beam power tetrode, 7.0 V/103 A filament*'''4CX25000A''' – 25 kW, 230 MHz Forced-air cooled, ceramic/metal radial-beam power tetrode, 9.5 V/150 A filament*'''4CX40000G''', '''4CX40000GM''' – 40 kW, 220 MHz Forced-air cooled, ceramic/metal power tetrode, 15 V/170 A filament*'''4PR65A/8187''' – 65 W<sub>avg</sub> Radiation+forced-air cooled, glass, pulse-rated power tetrode with a ''Pyrovac'' anode, 6.0 V/3.2-3.8 A filament, for use as modulator/amplifier*'''4PR125A/8247''' – 125 W<sub>avg</sub> Radiation+forced-air cooled, glass, pulse-rated power tetrode with a ''Pyrovac'' anode, 5.0 V/6-7 A filament*'''4PR250C/8248''' – 250 W<sub>avg</sub> Radiation+forced-air cooled, glass, pulse-rated power tetrode with a ''Pyrovac'' anode, 5.0 V/14 A filament*'''4PR400A/8188''' – 400 W<sub>avg</sub> Radiation+forced-air cooled, glass, pulse-rated power tetrode with a ''Pyrovac'' anode, 5.0 V/13.5-14.7 A filament*'''4PR1000A/8189''' – 1 kW<sub>avg</sub> Radiation+forced-air cooled, glass, pulse-rated power tetrode with a ''Pyrovac'' anode, 7.5 V/20.0-22.7 A filament*'''4W300B/8249''' – 300 W, 500 MHz Water-cooled, glass beam power tetrode, 6.0 V/2.6 A heater, B8F/JEDEC B8-236 9-pin base*'''4W20000A/8173''' – 20 kW, 220 MHz Water-cooled, glass beam power tetrode, 6.0 V/2.6 A heater*'''4X150'''s – 150 W, 150 MHz Forced-air cooled beam power tetrode:*'''4X150A/7034''' = '''QEL1/150''' – 6.0 V/2.6 A heater, B8F/JEDEC B8-236 9-pin base:*'''4X150D/7035''' – 26.5 V/580 mA heater, B8F/JEDEC B8-236 9-pin base:*'''4X150G/8172''' – 2.5 V/6.2-7.3 A heater, coaxial:*'''4X150R/8296''' – Ruggedized, 6.0 V/2.4-3.0 A heater, B8F/JEDEC B8-236 9-pin base:*'''4X150S/8297''' – Ruggedized, 26.5 V/560-680 mA heater, B8F/JEDEC B8-236 9-pin base*'''4X250B''' (6.0 V/2.3-2.9 A heater), '''4X250F''' (26.5 V/500 mA heater) – 150 W, 175 MHz Forced-air cooled beam power tetrode, B8F/JEDEC B8-236 9-pin base*'''4X500A''' – 500 W, 120 MHz Forced-air cooled beam power tetrode, 5.0 V/12.2-13.7 A filament*'''4X5000A''' – 5 kW, 30 MHz Forced-air cooled beam power tetrode, 7.5 V/75 A filament*'''B36''' (13 V/300 mA heater), '''B65''' (6.3 V/600 mA heater) – Dual AF triode, μ = 20, 300 V anode, Octal base*'''B319''' – Dual RF triode, μ = 24, 250 V anode, 7.4 V/300 mA heater, Noval base*'''B329''' = '''[[12AU7]]/ECC82''' – Dual medium-μ triode, μ = 17, 250 V anode, center-tapped 12.6 V/150 mA resp. 6.3 V/300 mA heater*'''B339''' = '''[[12AX7]]/ECC83''' – Dual high-μ AF triode, μ = 100, 250 V anode, center-tapped 12.6 V/150 mA resp. 6.3 V/300 mA heater*'''D63''' = '''6H6-G''' – Indirectly heated separate-cathode dual diode, 6.3 V/300 mA heater, Octal base*'''D77''' = '''6AL5/EAA91/EB91''' – Indirectly heated separate-cathode dual diode, 6.3 V/300 mA heater, Miniature 7-pin base*'''DG2''' – Directly heated dual-grid triode for use as mixer, 2 V/200 mA filament, 80 V anode, O5A European 5-pin base, technically a tetrode*'''DH30''' – Indirectly heated dual diode + triode, 13 V/300 mA heater, M7A British 7-pin base with control grid on top cap*'''DH63''' – Indirectly heated dual diode + AF triode, 6.3 V/300 mA heater, Octal base*'''DH77''' = '''6AT6/EBC90''' – Indirectly heated, common cathode dual diode + high-μ AF triode for use in FM ratio detectors, triode μ = 70, 6.3 V/300 mA heater, Miniature 7-pin base*'''DH107''' – Indirectly heated, common cathode dual diode + high-μ AF triode, triode μ = 70, 19 V/100 mA heater, Miniature 7-pin base*'''DH719''' = '''6AK8/EABC80''' – Indirectly heated, triple diode + triode, triode μ = 70, 6.3 V/450 mA heater, Noval base*'''DN41''' – Indirectly heated dual diode + power pentode, 4 V/2.1 A heater, M7A British 7-pin base*'''DH''' – Indirectly 16 V/250 mADC heated high-μ AF triode, O5A European 5-pin base*'''H2''' = Cossor '''210RC''' – Directly heated high-μ AF triode, μ = 35, 150 V anode, 2 V/100 mA filament, A4A European 4-pin base*'''H30''' – Indirectly heated dual diode + high-μ AF triode, μ = 80, 250 V anode, 13 V/300 mA heater, M7A British 7-pin base with control grid on top cap*'''H42''' – Indirectly heated dual diode + high-μ AF triode, μ = 100, 250 V anode, 4 V/600 mA heater, M7A British 7-pin base with control grid on top cap*'''H410''' (4 V/100 mA filament), '''H610''' (6.0 V/100 mA filament) – Directly heated high-μ AF triode, μ = 40, 150 V anode, A4A European 4-pin base*'''HD22''' – Directly heated dual diode + AF triode, 2 V/200 mA filament, μ = 27, 150 V anode, O5A European 5-pin base*'''HD23''' – Directly heated dual diode + triode, 2 V/150 mA filament, μ = 28, 150 V anode, O5A European 5-pin base*'''HL2''' – Directly heated high-μ AF triode, 2 V/100 mA filament, μ = 27, 150 V anode, A4A European 4-pin base*'''HL210''' = Cossor '''210HF''' (2 V/100 mA filament, μ = 40), '''HL410''' = Telefunken '''RE034''' (4 V/100 mA filament, μ = 2.5), '''HL610''' (6.0 V/100 mA filament, μ = 30) – Directly heated high-μ AF triode, 150 V anode, A4A European 4-pin base*'''L2B''' – Directly heated low-μ AF triode, μ = 15.5, 150 V anode, 2 V/100 mA filament, A4A European 4-pin base*'''L21''' – Directly heated low-μ AF triode, 2 V/100 mA filament, A4A European 4-pin base*'''L30''' – Indirectly heated low-μ AF triode, μ = 12, 200 V anode, 13 V/300 mA heater, M7A British 7-pin base*'''L77''' = '''6C4/EC90''' – Indirectly heated low-μ triode, μ = 17, 6.3 V/150 mA heater, Miniature 7-pin base*'''L410''' = Mullard '''PM4X''' = Philips '''B406''' (4 V/100 mA filament), '''L610''' (6.0 V/100 mA filament) – Directly heated AF power triode, 50-150 V anode, μ = 15, A4A European 4-pin base*'''LN309''' = '''PCL83''' – Low-μ AF Triode + AF power pentode, 12.6 V/300 mA heater, Noval base*'''LP2''' – Directly heated AF power triode, 150 V anode, μ = 15, 2 V/200 mA filament, A4A European 4-pin base*'''LS5A''' – Directly heated AF power triode, 400 V anode, μ = 2.5, 4.25-5.25 V/800 mA filament, A4A European 4-pin base*'''LS6A''' – Directly heated AF power triode, 400 V anode, μ = 3, 6.0 V/2 A filament, A4A European 4-pin base*'''LZ319''' = '''9A8/PCF80''' – VHF oscillator/mixer triode/pentode, Noval base*'''MH4''' = CdL '''DW4011''' = Cossor '''41MHF''' = LaRadiotechnique '''TE24''' = Telefunken '''REN904''' = Valvo '''A4110''' = CV399 – Indirectly heated AF triode, μ = 40, 200 V anode, 4 V/1 A heater, O5A European 5-pin base*'''MH41''' = Cossor '''41MH''' – Indirectly heated AF triode, μ = 80, 200 V anode, 4 V/1 A heater, O5A European 5-pin base*'''MHD4''' = Hivac '''ACDDT''' – Indirectly heated dual diode + triode, μ = 40, 250 V anode, 4 V/1 A heater, M7A British 7-pin base*'''MHL4''' – Indirectly heated AF triode, μ = 20, 200 V anode, 4 V/1 A heater, O5A European 5-pin base*'''ML4''' – Indirectly heated AF triode, μ = 12, 250 V anode, 4 V/1 A heater, O5A European 5-pin base*'''MPT4''' – Indirectly heated AF power pentode, μ = 100, 250 V anode, 4 V/1 A heater, available in O5A European 5-pin or M7A British 7-pin base*'''MS4''' (μ = 550), '''MS4{{small|B}}''' (μ = 1120) – Sharp-cutoff RF/IF tetrode, 4 V/1 A heater, O5A European 5-pin base with anode on top terminal*'''MSP4''' (100 V screen grid), '''MSP41''' (240 V screen grid) – Indirectly heated RF/AF pentode, 4 V/1 A heater, M7A British 7-pin base*'''N17''' = '''3S4/DL92''' – Power pentode*'''N18''' = '''3Q4/DL95''' – Power pentode*'''N19''' = '''3V4/DL94''' = EdiSwan '''1P11''' – Power pentode*'''N30''', '''N30G''' – Indirectly heated ''Catkin'' AF power pentode, 13 V/300 mA heater, M7A British 7-pin base*'''N31''' – Indirectly heated AF power pentode, 26 V/300 mA heater, M7A British 7-pin base*'''N37''' – Indirectly heated AF power pentode, 13 V/300 mA heater, Miniature 7-pin base*'''N41''' = '''KT41''' – Power pentode, 4 V/2 A heater, M7A British 7-pin base*'''N42''' – Power pentode, 4 V/1 A heater, M7A British 7-pin base*'''N43''' – Power pentode, 4 V/2 A heater, M7A British 7-pin base*'''N108''' – Power pentode, 40 V/100 mA heater, Miniature 7-pin base*'''P2''' – Directly heated AF power triode, 150 V anode, μ = 7.5, 2 V/200 mA filament, A4A European 4-pin base*'''P240''' – Directly heated AF power triode, 150 V anode, μ = 4, 2 V/400 mA filament, A4A European 4-pin base*'''P410''' = Philips '''B409''' = Telefunken '''RE134''' = Valvo '''L414''' (4 V/100 mA filament), '''P415''' (4 V/150 mA filament), '''P425''' = Mullard '''PM254''' = Philips '''B405''' (4 V/250 mA filament) – Directly heated AF power triode, μ = 7.5, 150 V anode, A4A European 4-pin base*'''P610''' (6.0 V/100 mA filament, 150 V anode), '''P625''' (6.0 V/250 mA filament, 250 V anode), '''P625A''' (200 V anode) – Directly heated AF power triodes, A4A European 4-pin base*'''PT2''' – Directly heated AF power pentode, 2 V/200 mA filament, O5A European 5-pin base*'''PT4''' – Directly heated AF power pentode, μ = 40, 200 V anode, 4 V/1 A filament, O5A European 5-pin base*'''PT25H''' – 25 W Directly heated AF power pentode, 400 V anode, 4 V/2 A filament, O5A European 5-pin base*'''PT240''' = '''KT24''' – Directly heated AF power pentode, 2 V/200 mA filament, O5A European 5-pin base*'''PT425''' (4 V/250 mA filament), '''PT625''' (6 V/250 mA filament) – Directly heated AF power pentode, O5A European 5-pin base*'''S21''' (μ = 220, 2 V/100 mA filament), '''S22''' = Philips '''B262''' (μ = 350, 2 V/200 mA filament) – Directly heated sharp-cutoff tetrodes, 150 V anode, A4A European 4-pin base and top terminal*'''S23''', '''S24''' – Directly heated sharp-cutoff tetrodes, 150 V anode, 2 V/100 mA filament, A4A European 4-pin base with anode on top terminal*'''S410''' (4 V/100 mA filament), '''S610''' (6.0 V/100 mA filament) – Directly heated sharp-cutoff RF tetrode, A4A European 4-pin base*'''U10''' = Telefunken '''RGN1054''' = Mullard '''DW2X''' = EdiSwan '''D380B''' = Tungsram '''PV495''' – Full-wave rectifier*'''U12''' – Full-wave rectifier*'''U14''' – Full-wave rectifier*'''U16''' – Half-wave rectifier*'''U17''' – Half-wave rectifier*'''U18/20''' – Full-wave rectifier*'''U19''' – Half-wave rectifier*'''U31''' – Half-wave rectifier*'''U37''' – Half-wave rectifier*'''U41''' = '''1B3-GT/1G3-GT/DY30''' = '''1Ц7С'''↦'''1C7S''' – Half-wave rectifier*'''U43''' – Half-wave rectifier*'''U45''' – Half-wave rectifier*'''U50''' = '''5Y3-G''' – Full-wave rectifier*'''U54''' = '''GZ37''' – Full-wave rectifier*'''U78''' = '''6X4/EZ90''' – Full-wave rectifier*'''U107''' – Half-wave rectifier*'''U309''' – CRT horizontal deflection output booster/damper/efficiency diode for color TV*'''U319''' – Half-wave rectifier*'''U329''' – CRT horizontal deflection output booster/damper/efficiency diode for color TV*'''U709''' = '''6CA4/EZ81''' – Full-wave rectifier*'''VMP4G''' – Indirectly heated, remote-cutoff pentode, 4 V/1 A heater, M7A British 7-pin base with anode on top cap*'''VMS4''' = Philips '''E445''' = Telefunken '''RENS1214''' = Valvo '''H4125D''' (semiremote-cutoff), '''VMS4B''' (remote-cutoff) – Indirectly heated RF/IF tetrode, 4 V/1 A heater, O5A European 5-pin base with anode on top cap*'''VP21''' – Directly heated, remote-cutoff pentode, 2 V/100 mA filament, M7A British 7-pin base with anode on top cap*'''W17''' = '''1T4/DF91''' = EdiSwan '''1F3''' – Remote-cutoff RF/IF pentode, 1.4 V/50 mA filament, Miniature 7-pin base*'''W21''' – Remote-cutoff RF/IF tetrode, 2 V/100 mA filament, A4A European 4-pin base with control grid on top cap*'''W30''' – ''Catkin'' Remote-cutoff RF/IF tetrode, 13 V/300 mA heater, M7A British 7-pin base with anode on top cap*'''W31''' = Ferranti '''VPTS''' – Remote-cutoff RF/IF pentode, 13 V/300 mA heater, M7A British 7-pin base with anode on top cap*'''W42''' – Remote-cutoff RF/IF pentode, 4 V/600 mA heater, M7A British 7-pin base with control grid on top cap*'''W77''' = '''6CQ6/EF92''' = Brimar '''9D6''' – Remote-cutoff RF/IF pentode, 6.3 V/200 mA heater, Miniature 7-pin base*'''W107''' – Remote-cutoff RF/IF pentode, 12.6 V/100 mA heater, Miniature 7-pin base*'''X18''' = '''1AC6/DK92''' – Heptode pentagrid converter, 1.4 V/50 mA filament, Miniature 7-pin base*'''X21''' – Remote-cutoff heptode pentagrid converter, 2 V/100 mA filament, M7A British 7-pin base with control grid #4 on top cap*'''X22''' – Heptode pentagrid converter, 2 V/150 mA filament, 7-pin base*'''X23''' – [[Pentagrid converter#Hexode|Triode/hexode oscillator/mixer]], 2 V/300 mA filament, M7A British 7-pin base with hexode control grid #1 on top cap*'''X30''', '''X32''' (Low hum) – Remote-cutoff heptode pentagrid converter, 13 V/300 mA heater, M7A British 7-pin base with control grid #4 on top cap*'''X31''' – Remote-cutoff triode/hexode oscillator/mixer, 13 V/300 mA heater, M7A British 7-pin base with hexode control grid #1 on top cap*'''X42''' – Remote-cutoff heptode pentagrid converter, 4 V/600 mA heater, M7A British 7-pin base with control grid #4 on top cap*'''X64''' = '''6L7-G''' – Mixing heptode requiring a separate oscillator, 6.3 V/300 mA heater, Octal base*'''X65''' – Remote-cutoff triode/hexode oscillator/mixer, 6.3 V/300 mA heater, Octal base with hexode control grid #1 on top cap*'''X79''' = '''6AE8''' – Remote-cutoff triode/hexode oscillator/mixer, 6.3 V/300 mA heater, Noval base*'''X109''' – Remote-cutoff triode/hexode oscillator/mixer, 19 V/100 mA heater, Noval base*'''X719''' = '''6AJ8/ECH81''' – Remote-cutoff triode/heptode oscillator/mixer, 6.3 V/300 mA heater, Noval base*'''Z21''' – Sharp-cutoff RF/IF tetrode, 2 V/100 mA filament, M7A British 7-pin base with anode on top cap*'''Z319''' = EEV '''E2133''' (''6351'') – [[Secondary emission#Special amplifying tubes|Secondary emission]], sharp-cutoff wideband pentode, 6.3 V/300 mA heater, Noval base*'''Z359''' (12.6 V/300 mA heater between pins 4, 5), '''Z759''' (6.3 V/600 mA heater between pins 5, 6) – Sharp-cutoff video pentodes, 6.3 V/300 mA heater, Noval base*'''Z719''' = '''6BX6/EF80''' – Sharp-cutoff RF pentode, 6.3 V/300 mA heater, Noval base*'''Z729''' = '''6BK8/6CF8/EF86''' – Sharp-cutoff, low-noise AF pentode, 6.3 V/300 mA heater, Noval base*'''ZD17''' = '''1S5/DAF91''' = EdiSwan '''1FD9''' – Diode + AF pentode, 1.4 V/50 mA filament, Miniature 7-pin base*'''A2134''' (''CV2179'') – Power pentode for use as series regulator in DC power supplies, indirect 6.3 V/635 mA heater, Miniature 7-pin base*'''A109''' – Directly heated AF/RF triode, 1.0-1.3 V/60 mA filament, 20-120 V anode, μ = 9, A4A European 4-pin (default) base*'''A141''' – Directly heated AF/RF space charge grid tetrode, 1.0-1.3 V/60 mA filament, 2-20 V anode, μ = 4.5, A4A European 4-pin base with the space charge grid on a lateral terminal (default)*'''A241''' – Directly heated AF/RF space charge grid tetrode, 1.7-2.0 V/60 mA filament, 2-20 V anode, μ = 4.5, A4A European 4-pin base with the space charge grid on a lateral terminal (default)*'''A306''' – Directly heated AF triode, 2.7-3.3 V/60 mA filament, 20-100 V anode, μ = 6, A4A European 4-pin (default) base*'''A310''' – Directly heated AF/RF triode, 2.7-3.3 V/60 mA filament, 20-100 V anode, μ = 10, A4A European 4-pin (default) base*'''A341''' – Directly heated AF/RF space charge grid tetrode, 2.7-3.3 V/60 mA filament, 2-20 V anode, μ = 4.5, A4A European 4-pin base with the space charge grid on a lateral terminal (default)*'''A406''' – Directly heated AF triode, 3.4-4.0 V/60 mA filament, 20-100 V anode, μ = 6, A4A European 4-pin (default) base*'''A409''' = Mullard '''PM3X''' – Directly heated AF triode, 4 V/60 mA filament, 20-150 V anode, μ = 9, A4A European 4-pin (default) base*'''A410''' – Directly heated AF/RF triode, 3.4-4.0 V/60 mA filament, 20-100 V anode, μ = 10, A4A European 4-pin (default) base*'''A415''' – Directly heated AF triode, 4 V/80 mA filament, 50-150 V anode, μ = 15, A4A European 4-pin (default) base*'''B105''' – Directly heated AF power triode, 1.0-1.3 V/150 mA filament, 20-120 V anode, μ = 5, A4A European 4-pin (default) base*'''B217''' – Directly heated triode, 2 V/100 mA filament, 150 V anode, μ = 17, A4A European 4-pin base*'''B228''' = Cossor '''210RC''' = M/OV '''H210''' – Directly heated triode, 2 V/100 mA filament, 150 V anode, μ = 28, A4A European 4-pin base*'''B240''' = Telefunken '''RE402B''' – Directly heated, dual AF power triode, 2 V/200 mA filament, 120 V anode, output power 1.3 W, C7H European 7-pin base*'''B255''' = Ferranti '''S2''' – Directly heated, remote-cutoff, screen grid tetrode, 2 V/180 mA filament, μ = 400, 150 V anode, A4A European 4-pin base and top terminal*'''B262''' = M-OV/GEC '''S22''' – Directly heated screen grid tetrode, 2 V/180 mA filament, μ = 500, 150 V anode, A4A European 4-pin base and top terminal*'''B403''' – Directly heated AF power triode, 4 V/150 mA filament, 50-150 V anode, μ = 3, A4A European 4-pin base*'''B405''' – Directly heated AF power triode, 4 V/150 mA filament, 50-150 V anode, μ = 5, A4A European 4-pin base*'''B406''' = Mullard '''PM4X''' = Valvo '''L410''' – Directly heated AF power triode, 4 V/100 mA filament, 50-150 V anode, μ = 6, A4A European 4-pin base*'''B424''' = Mullard '''PM3D''' – Directly heated AF power triode, 4 V/100 mA filament, 200 V anode, μ = 24, A4A European 4-pin base*'''B438''' = Valvo '''W410''' – Directly heated AF power triode, 4 V/100 mA filament, 200 V anode, μ = 38, A4A European 4-pin base*'''B442''' = Valvo '''H410D''' – Directly heated screen grid tetrode, 4 V/100 mA filament, μ = 350, 200 V anode, A4A European 4-pin base and top terminal*'''B443''' = Cossor '''415PT''' = M-OV/GEC '''425PT''' – Directly heated power pentode, 4 V/150 mA filament, μ = 100, 50-150 V anode, A4A European 4-pin base*'''B443S''' = Telefunken '''RES164''' = Tungsram '''PP416''' – Directly heated power pentode, 4 V/150 mA filament, μ = 70, 200 V anode, O5A European 5-pin base*'''B543''' – Directly heated power pentode, 5 V/100 mA filament, μ = 60, 200 V anode, O5A European 5-pin base*'''B2006''' = Telefunken '''REN1822''' = Tungsram '''P2018''' = Valvo '''L2118''' – Indirectly heated power triode, 20 V/180 mA DC series heater, μ = 6, 200 V anode, O5A European 5-pin base*'''B2041''' = Telefunken '''REN1817D''' = Tungsram '''DG2018''' = Valvo '''U1718D''' – Indirectly heated dual-grid triode for use as mixer, 20 V/180 mA DC series heater, 100 V anode, O5A European 5-pin base with one grid on a lateral screw terminal, technically a tetrode*'''B2042''' – Indirectly heated sharp-cutoff RF/IF screen grid tetrode, 20 V/180 mA DC series heater, μ = 400, 100 V anode on top terminal, O5A European 5-pin base*'''B2046''' = Telefunken '''RENS1884''' = Tungsram '''HP2018''' – Indirectly heated RF/IF pentode, 20 V/180 mA DC series heater, μ = 5000, 200 V anode on top terminal, O5A European 5-pin base*'''B2047''' = Telefunken '''RENS1894''' = Tungsram '''HP2118''' = Valvo '''H2618D''' – Indirectly heated remote-cutoff RF/IF pentode, 20 V/180 mA DC series heater, μ = 2000, 200 V anode on top terminal, O5A European 5-pin base*'''B2049''' = Telefunken '''RENS1834''' = Valvo '''X2918''' – Indirectly heated remote-cutoff hexode mixer, 20 V/180 mA DC series heater, 200 V anode, C7H European 7-pin base*'''B2052T''' = Mullard '''SG20''' = Telefunken '''RENS1818''' = Valvo '''H1818D''' – Indirectly heated sharp-cutoff RF/IF tetrode, 20 V/180 mA DC series heater, 250 V anode on top terminal, O5A European 5-pin base*'''C142''' = Valvo '''H125D''' – Directly heated screen grid tetrode, 1 V/250 mA filament, μ = 150, 50-150 V anode on top terminal, A4A European 4-pin base*'''C243N''' – Directly heated power pentode, 2 V/200 mA filament, μ = 100, 150 V anode, O5A European 5-pin base*'''C405''' = Tungsram '''P430''' – Directly heated AF power triode, 4 V/300 mA filament, 250 V anode, μ = 5, A4A European 4-pin base*'''C443''' = Telefunken '''RES364''' = Tungsram '''PP430''' = Valvo '''L425D''' – Directly heated power pentode, 4 V/250 mA filament, μ = 60, 300 V anode, A4A European 4-pin base with lateral screw terminal; optionally O5A European 5-pin base*'''C443N''' = Mullard '''PM24DC''' = Telefunken '''RES374''' = Tungsram '''PP431''' = Valvo '''L427D''' – Directly heated power pentode, 4 V/250 mA filament, μ = 50, 300 V anode, O5A European 5-pin base:*'''C443N (Serie 250)''' – μ = 32*'''C453''' – Slightly changed or only renamed C443*'''C509''' = American '''01-A''' – Directly heated AF power triode, 4.5-5.3 V/250 mA filament, 20-120 V anode, μ = 9, American UX4 4-pin base for use in imported radios with 3-cell lead-acid heater supply; optionally A4A European 4-pin base*'''D143''' = Valvo '''L160D''' – Directly heated power pentode, 1 V/650 mA filament, μ = 100, 50-150 V anode, A4A European 4-pin base*'''D404''' = Mullard '''AC044X''' = Telefunken '''RE604''' = Tungsram '''P460''' = Valvo '''LK460''' – Directly heated AF power triode, 4 V/650 mA filament, 250 V anode, μ = 3.5, A4A European 4-pin base*'''E406''' – Directly heated AF power triode, 4 V/1 A filament, 150-250 V anode, μ = 6, A4A European 4-pin base*'''E408''' – Directly heated AF/modulator power triode, 4 V/900 mA filament, 200-400 V anode, μ = 8, A4A European 4-pin base*'''E408N''' – Directly heated AF power triode, 4 V/1 A filament, 400 V anode, μ = 8, A4A European 4-pin base*'''E409''' = Valvo '''L4100''' – Indirectly heated AF power triode, 4 V/1 A heater, 200 V anode, μ = 9, O5A European 5-pin base*'''E414''' – Indirectly heated AF triode, 4 V/1 A heater, 200 V anode, μ = 14, A4A European 4-pin base*'''E415''' = Telefunken '''REN804''' = Valvo '''H4100''' – Indirectly heated AF triode, 4 V/900 mA heater, 50-150 V anode, μ = 15, A4A European 4-pin base*'''E424''' – Indirectly heated AF triode, 4 V/1 A heater, 200 V anode, μ = 24, O5A European 5-pin base; optionally A4A European 4-pin base with lateral screw terminal*'''E428''' – Indirectly heated AF triode, 4 V/1 A heater, 200 V anode, μ = 28, O5A European 5-pin base*'''E430''' – Indirectly heated AF triode, 4 V/1 A heater, 50-150 V anode, μ = 30, O5A European 5-pin base; optionally A4A European 4-pin base with lateral screw terminal*'''E435''' – Indirectly heated AF triode, 4 V/900 mA heater, 50-150 V anode, μ = 35, O5A European 5-pin base; optionally A4A European 4-pin base with lateral screw terminal*'''E438''' = Valvo '''W4080''' – Indirectly heated triode, μ = 38, 200 V anode, O5A European 5-pin base; B2038 with a 4 V/1 A heater*'''E441''' = Tungsram '''DG4101''' = Valvo '''U4100D''' – Indirectly heated dual-grid triode for use as mixer, 4 V/900 mA heater, 100 V anode, O5A European 5-pin base with one grid on a lateral screw terminal, technically a tetrode*'''E442''' = Valvo '''H4100D''' – Indirectly heated RF/IF screen grid tetrode, 4 V/900 mA heater, μ = 700, 150-200 V anode, O5A European 5-pin base and top terminal*'''E442S''' = Telefunken '''RENS1204''' = Valvo '''H4080D''' – Indirectly heated RF/IF screen grid tetrode, 4 V/1 A heater, μ = 400, 200 V anode, O5A European 5-pin base and top terminal*'''E443''' – Directly heated power pentode, 4 V/900 mA filament, μ = 60, 300-400 V anode, O5A European 5-pin base*'''E452T''' = Telefunken '''RENS1264''' = Valvo '''H4111D''' – Indirectly heated screen grid tetrode, 4 V/1 A heater, μ = 900, 200 V anode, O5A European 5-pin base and top terminal*'''E453''' = Telefunken '''RENS1374D''' = Tungsram '''APP4100''' = Valvo '''L4150D''' – Indirectly heated power pentode, 4 V/1.1 A heater, μ = 175, 250 V anode, O5A European 5-pin base*'''E455''' = Mullard '''MM4V''' = Telefunken '''RENS1274''' – Indirectly heated remote-cutoff RF pentode, 4 V/1 A heater, μ = 700, 200 V anode, O5A European 5-pin base and top terminal*'''E462''' – Indirectly heated sharp-cutoff RF pentode, 4 V/1 A heater, μ = 900, 200 V anode, O5A European 5-pin base and top terminal*'''E463''' = Mullard '''ME463''' = Telefunken '''RENS1384''' = Tungsram '''APP4130''' = Valvo '''L4138D''' – Indirectly heated power pentode, 4 V/1.35 A heater, μ = 100, 250 V anode, B6H European 6-pin base*'''F410''' = Valvo '''LK4200''' – Directly heated power triode, 4 V/2 A filament, μ = 10, 400-550 V anode, A4A European 4-pin base*'''F443''' = Valvo '''L495D''' – Directly heated power pentode, 4 V/2 A filament, μ = 100, 550 V anode, O5A European 5-pin base*'''F443N''' = Valvo '''L497D''' – Directly heated power pentode, 4 V/2 A filament, μ = 80, 300 V anode, O5A European 5-pin base*'''F704''' – Directly heated AF/modulator power triode, 7.5 V/1.25 A filament, μ = 3.8, 400-450 V anode, A4A European 4-pin base or American UX4 base for use in imported devices*'''F708''' – Directly heated AF/modulator power triode, 7.5 V/1.25 A filament, μ = 8, 250-450 V anode, A4A European 4-pin baseThe [[Milan]] branches of Philips and Siemens-Telefunken sold M-P tubes on the Italian market, some modified:{{columns-list|colwidth=16em|1=*'''WE11''' – EBC3*'''WE12''' – EM4*'''WE13''' – ECL11 w/P8A base*'''WE14''' = '''EL6'''*'''WE15''' = '''EL3N'''*'''WE16''' – EF11 w/P8A base*'''WE17''' – EF6*'''WE18''' = '''EFM1'''*'''WE19''' – EBF2*'''WE20''' – ECH11 w/P8A base*'''WE21''' = '''AK1'''*'''WE22''' = '''WE40''' = '''ACH1'''*'''WE23''' = '''E446''' = '''RENS1284'''*'''WE24''' = '''E447''' = '''RENS1294'''*'''WE25''' – (AF2)*'''WE26''' = '''E444''' = '''RENS1254'''*'''WE27''' = '''E424N''' = '''REN904'''*'''WE28''' = '''E499''' = '''REN914'''*'''WE29''' = '''E444S''' = '''REN924'''*'''WE30''' = '''E443H''' = '''RES964'''*'''WE31''' = '''AB1'''*'''WE32''' = '''AK2'''*'''WE33''' = '''AF3'''*'''WE34''' = '''AF7'''*'''WE35''' = '''AL1'''*'''WE36''' = '''AB2'''*'''WE37''' = '''ABC1'''*'''WE37F''' – ABF1*'''WE38''' = '''AL4'''*'''WE39''' = '''AC2'''*'''WE41''' = '''ABL1'''*'''WE42''' = '''AL5'''*'''WE43''' = '''ACH1C'''*'''WE44''' – Triode+hexode*'''WE51''' = '''1805''' = '''RGN1064'''*'''WE52''' = '''1561''' = '''RGN2004'''*'''WE53''' = '''AZ2'''*'''WE54''', '''WE55''' – AZ1*'''WE56''' = '''AZ4'''*'''WE65''' – Full-wave rectifier}}*'''1805''' = '''RGN1064''' – 1.4 kV, 2×50 mA Full-wave rectifier:*'''ACH1C''' – ACH1 with a P8A side-contact 8 base*'''YD1030''' = Siemens '''RS2001W''' (60 kW, Water jacket-cooled ), '''YD1032''' = '''RS2001V''' (110 kW, Water/vapor-cooled) – 10 MHz RF power triode, 18 V/164 A filament*'''YD1092''' = Siemens '''RS2031V''' – 110 kW, 30 MHz Water/vapor-cooled RF power triode, 17 V/156 A filament*'''YD1120''' – 5 kW, 30 MHz Forced-air cooled RF power triode, center-tapped 12.6 V/33 A filament*'''YD1140''' (100 kW, Water-cooled), '''YD1141''' (45 kW, Forced-air cooled) – 4 MHz RF power triode, 17.5 V/196 A filament*'''YD1174''' (Forced-air cooled), '''YD1178''' (Helix-cooled) – 10 kW, 120 MHz Ceramic/metal RF power triode, 5.8 V/130 A filament*'''YL1010''' = Siemens '''RS1082CW''' (25 kW, Water-cooled), '''YL1011''' = '''RS1082CL''' (30 kW, Forced-air cooled), '''YL1012''' = '''RS1082CV''' (45 kW, Water/vapor-cooled) – 30 MHz Ceramic/metal, coaxial, linear RF power pentode, 10 V/200 A filament*'''YL1040''' – 130 W, 1 GHz Forced-air cooled, ceramic/metal, coaxial, planar, linear RF power pentode, 6.3 V/2.5 A heater*'''YL1042''' – 130 W, 1.25 GHz Forced-air cooled, ceramic/metal, coaxial, planar, linear RF power pentode, 6.3 V/1.1 A heater*'''YL1055''', '''YL1056''', '''YL1057''', '''YL1058''' – 2 kW, 1215 MHz Forced-air cooled, ceramic/metal, coaxial, linear RF power pentode, 3.8 V/19.5 A filament*'''YL1100''' (Forced-air cooled, 6.3 V/1.8 A heater), '''YL1101''' (Forced-air cooled, 26.5 V/520 mA), '''YL1102''' (Contact/conduction cooled, 6.3 V/1.8 A heater), '''YL1103''' (Contact/conduction cooled, 26.5 V/520 mA) – 115 W, 400 MHz Ceramic/metal, linear RF beam power tetrode*'''YL1110''' – 330 W, 400 MHz Forced-air cooled, ceramic/metal, linear RF beam power tetrode, 6.3 V/7.9 A heater*'''YL1121''' (Forced-air cooled), '''YL1122''' (Water-cooled) – 4 kW, 60 MHz Ceramic/metal, coaxial, linear RF power pentode, 12.6 V/14.5 A heater*'''YL1230''' – 1.5 kW, 220 MHz Forced-air cooled, ceramic/metal, coaxial, linear RF power tetrode, 5 V/18 A heater*'''YD1240''', '''YD1244''' – 1.5 kW, 250 MHz Forced-air cooled, ceramic/metal RF power triode, 6.3 V/33 A filament*'''YL1260''' – 250 W, 30 MHz Radiation-cooled, RF beam power tetrode, 12.6 V/2.3 A heater, B5D/U5G ''Giant 5-pin'' UY base with anode on top cap*'''YL1320''' – 250 W, 500 MHz Contact/conduction-cooled, ceramic/metal VHF power tetrode, 6 V/2.6 A heater*'''YL1490''' – 200 kW, 30 MHz Water/vapor-cooled, ceramic/metal, coaxial, RF power tetrode, 7.2 V/1.025 kA filament*'''YL1500''' – 15 kW, 30 MHz Forced-air cooled, ceramic/metal, coaxial, RF power tetrode, 7.5 V/115 A filament*'''QBL3.5/2000''' – 1.5 kW, 900&namp;bsp;MHz Forced-air cooled ceramic, coaxial power tetrode, 4 V/60 A filament*'''QV03/12''' – 12 W, 175 MHz Beam power tetrode, 6 V/750 mA heater, Noval base*'''QY4/400''' – 400 W, 110 MHz Forced-air cooled beam power tetrode, 5 V/14.5 A filament, B5F 5-pin base with anode on top cap*'''TA3/200''' – 3 kV, 150 W, 3 MHz Radiation-cooled power triode, 14 V/4 A filament, 3-pin base with anode on top cap*'''TA3/500''' (Anode on top terminal, 2 MHz), '''TA3/500K''' (anode on lateral terminal, 6.6 MHz) – 3 kV, 400 W Radiation-cooled power triode, 16 V/8.5 A filament, 3-pin base with grid on lateral terminal*'''TA4/250''' – 4 kV, 250 W, 2 MHz Radiation-cooled power triode, 12.5 V/5.5 A filament*'''TA4/800''' – 4 kV, 500 W, 2 MHz Radiation-cooled power triode, center-tapped 23 V/14.7 A filament*'''TA4/1500''', '''TA4/1500K''' – 5 kV, 750 W, 3 MHz Forced-air cooled power triode, 16 V/16 A filament, 3-pin base with anode and control grid on lateral terminals*'''TA5/4000''' – 5 kV, 5 kW, 2 MHz Water-cooled power triode, 22 V/41 A filament*'''TA7/700''' – 7 kV, 400 W Radiation-cooled power triode, 12.5 V/7.7 A filament*'''TA8/300''' – 8 kV, 150 W Radiation-cooled power triode, 9 V/5.6 A filament*'''TA10/600''' – 12 kV, 200 W, 2 MHz Radiation-cooled power triode, 12.5 V/6.3 A filament*'''TA10/1250''' – 12 kV, 400 W Radiation-cooled power triode, 15 V/9.5 A filament*'''TA10/1750''' – 12 kV, 600 W Radiation-cooled power triode, 17 V/15 A filament*'''TA10/2500''' – 12 kV, 750 W Radiation-cooled power triode, 12.5 V/24 A filament*'''TA10/5000K''', '''TA10/5000KI''' – 12 kV, 5 kW, 2 MHz Water-cooled power triode, 21.5 V/26 A filament*'''TA12/10000''' – 12 kV, 12 kW, 1 MHz Water-cooled power triode, 22 V/38.5 A filament*'''TA12/15''' – 12 kV, 7.5 kW, 2 MHz Water-cooled power triode, 22 V/41 A filament*'''TA12/20000''' – 12 kV, 15 kW, 1 MHz Water-cooled power triode, 22 V/77 A filament*'''TA12/20''' – 15 kV, 18 kW, 2 MHz Water-cooled power triode, 21.5 V/79 A filament*'''TA12/35''' – 15 kV, 18 kW, 15 MHz Water-cooled power triode, 3-phase internally star-connected with center/neutral available, 49 V<sub>Δ</sub>/50 A<sub>Y</sub> each, filaments*'''TA18/100000''' (18 kV), '''TA18/100''' (20 kV) – 70 kW, 2 MHz Water-cooled power triode, 33 V/207 A filament*'''TB2/200''' – 2 kV, 130 W, 46 MHz Radiation-cooled power triode, 12 V/2.7 A filament*'''TB2/250''' – 2 kV, 150/200 W, 6.6 MHz Radiation-cooled power triode, 11 V/3.8 A filament, 3-pin base with anode on top cap*'''TB2/500''' – 2 kV, 300 W, 20 MHz Radiation-cooled power triode, 12 V/7.3 A filament*'''TB3/350''' – 3 kV, 100 W, 40 MHz Radiation-cooled power triode, 5 V/6.3 A filament, 4-pin base with anode on top cap*'''TB4/800''' – 4 kV, 250 W, 40 MHz Radiation-cooled power triode, 5 V/10.5 A filament, 4-pin base with anode on top cap*'''TBL2/500''' – 2.7 kV, 500 W, 400 MHz Forced-air cooled, ceramic, coaxial power triode, 3.4 V/19 A filament*'''TBL6/20''' – 5.5 kV, 10 kW, 110 MHz Forced-air cooled power triode, 6.3 V/154 A filament*'''TBL7/9000''' – 8 kV, 6 kW, 50 MHz Forced-air cooled power triode, 12.6 V/32 A filament*'''TBL12/40''' – 13 kV, 15 kW, 30 MHz Forced-air cooled power triode, 8 V/130 A filament*'''TBW6/20''' – 5.5 kV, 12 kW, 110 MHz Water-cooled power triode, 6.3 V/154 A filament*'''TBW7/9000''' – 8 kV, 6 kW, 50 MHz Water-cooled power triode, 12.6 V/32 A filament:*'''TC03/5I''' – Single-ended TC03/5 with a 4 V/280 mA filament and a P8A side-contact 8 base*'''TY3/250''' – 250 W, 100 MHz VHF power triode, 5 V/14 A filament, B5F 5-pin base with anode on top cap*'''TY4/350''' – 400 W, 20 MHz power triode, 10 V/10 A filament*'''TY4/400''' – 400 W, 85 MHz VHF power triode, 5 V/14 A filament*'''TY4/500''' – 450 W, 100 MHz VHF power triode, 10 V/9.9 A filament*'''TY5/500''' – 1 kW, 50 MHz VHF power triode, 5 V/32 A filament*'''TY6/800''' – 1.5 kW, 50 MHz VHF power triode, 6.3 V/32.5 A filament*'''TY6/1250A''' – 1.3 kW, 50 MHz Forced-air cooled VHF power triode, 6.3 V/65 A filament*'''TY6/3000A''' – 3 kW, 30 MHz Forced-air cooled VHF power triode, 12.6 V/33 A filament*'''TY6/5000A''', '''TY6/5000B''' (5 kW, Forced-air cooled), '''TY6/5000H''' (6 kW, Helix-cooled), '''TY6/5000W''' (6 kW, Water jacket-cooled) – 75 MHz Forced-air cooled VHF power triode, 12.6 V/33 A filament*'''TY6/12A''' – 10 kW, 110 MHz Forced-air cooled VHF power triode, 6.3 V/154 A filament*'''TY7/6000A''' (Forced-air cooled), '''TY7/6000H''' (helix-cooled), '''TY7/6000W''' (water jacket-cooled) – 6 kW, 30 MHz VHF power triode, 12.6 V/33 A filament*'''TY8/6000A''' (Forced-air cooled), '''TY8/6000H''' (helix-cooled), '''TY8/6000W''' (water jacket-cooled) – 6 kW, 50 MHz VHF power triode, 12.6 V/33 A filament*'''TY8/15A''' (10 kW, Forced-air cooled), '''TY8/15H''' (15 kW, Helix-cooled), '''TY8/15W''' (15 kW, Water jacket-cooled) – 30 MHz RF Power triode, 6.3 V/130 A filament*'''PB2/500''' – 250 W, 10 MHz Shortwave power pentode, 12 V/7.3 A filament, 5-pin base with top pins for anode and suppressor grid*'''PB3/800''' – 450 W, 10 MHz Shortwave power pentode, center-tapped 12 V/8.5 A filament, 5-pin base with top pins for anode and suppressor grid*'''PC03/3''' (4 V/130 mA filament), '''PC03/3A''' (2 V/240 mA filament), '''PC03/3B''' (4 V/130 mA filament) – 3 W, 20 MHz Shortwave power pentode, P8A side-contact 8 base with anode on top cap*'''PC05/15''' – 15 W, 20 MHz Shortwave power pentode, 4 V/1.1 A filament, P8A side-contact 8 base with anode on top terminal*'''PC1/50''' – 35 W, 20 MHz Shortwave power pentode, 12 V/4 A filament, 4-pin base with anode on top terminal*'''PC1.5/100''' – 85 W, 20 MHz Shortwave power pentode, 10 V/2 A filament, 4-pin base with anode on top terminal*'''PE05/15''' – 15 W, 20 MHz Shortwave power pentode, 12 V/370 mA heater, P8A side-contact 8 base with anode on top cap*'''PE05/25''' – 12 W, 100 MHz Power pentode, 12.6 V/700 mA heater, 8-pin base*'''PE06/40''' = '''PE06/40P''' (6.3 V/1.3 A heater, P8A side-contact 8 base), '''PE06/40E''' (12.6 V/650 mA heater, American U7A base), '''PE06/40N''' (6.3 V/1.3 A heater, American UY5 base) – 25 W, 60 MHz Shortwave power pentode, 6.3 V/1.3 A heater, anode on top cap*'''PE1/80''' – 35 W, 20 MHz Shortwave power pentode, 12 V/900 mA heater, P8A side-contact 8 base with anode on top cap*'''QB3/500''' – 350 W, 2 MHz Radiation-cooled power tetrode, 11 V/10 A filament*'''QQV03/10''' – 2×5 W, 100 MHz Radiation-cooled dual power tetrode, center-tapped 12.6 V/420 mA resp. 6.3 V/830 mA heater, Noval base*'''QQV03/25''' – 2×12.5 W, 180 MHz Radiation-cooled dual power tetrode, center-tapped 12.6 V/650 mA resp. 6.3 V/1.3 A heater, Septar base with anodes on top pins*'''QQV04/15''' – 2×7.5 W, 200 MHz Radiation-cooled dual power tetrode, center-tapped 12.6 V/800 mA resp. 6.3 V/1.6 A heater, Septar base with anodes on top pins*'''QQV04/16''' – 2×8 W, 960 MHz Radiation-cooled dual power tetrode, center-tapped 12.6 V/300 mA resp. 6.3 V/600 mA heater, special 10-pin base*'''QQV06/40A''' – 2×20 W, 200 MHz Radiation-cooled dual power tetrode, center-tapped 12.6 V/900 mA resp. 6.3 V/1.8 A heater, Septar base with anodes on top pins*'''QQV07/40''' – 2×20 W, 100 MHz Dual beam power tetrode, center-tapped 12.6 V/1.25 A resp. 6.3 V/2.5 A heater, ''MVH17'' base with anodes on top pins*'''QQV5/P10''' – 5 kV, 10 A, 2×7.5 W Radiation-cooled, pulse-rated dual power tetrode for use as a modulator at duty factor 0.001, center-tapped 12.6 V/1.2 A resp. 6.3 V/2.4 A heater, 7-pin base with anodes on top pins*'''QQZ04/15''' – 2×6 W, 186 MHz Dual beam power tetrode, center-tapped 6.3 V/680 mA quickstart filament, B8G 8-pin Loctal base*'''QV06/20''' – 20 W, 60 MHz Radiation-cooled beam power tetrode, 6.3 V/1.25 A heater, Octal base with anode on top cap*'''QV08/100''' – 100 W, 30 MHz Radiation-cooled beam power tetrode, 6.3 V/3.9 A heater, B5F 5-pin base with anode on top cap*'''QV1/150A''' – 150 W, 165 MHz Forced-air cooled power tetrode, 6.3 V/2.6 A heater, B8F 8-pin base*'''QV20/P18''' – 20 kV, 18 A, 2×60 W Radiation-cooled, pulse-rated power tetrode, 26 V/2.25 A heater, B4A 4-pin base with anode on top cap*'''QY3/125''' – 125 W, 120 MHz Beam power tetrode, 5 V/6.5 A filament, B5F 5-pin base with anode on top cap*'''QY3/1000A''' – 1.5 kW, 900 MHz Forced-air cooled, coaxial power tetrode, 4 V/60 A filament*'''QY4/500A''' – 500 W, 120 MHz Forced-air cooled power tetrode, 4 V/60 A filament, 4-pin base with anode on top cap*'''QY5/500''' – 500 W, 75 MHz Power tetrode, 10 V/9.9 A filament, B5F or B5K 5-pin base with anode on top pin*'''QY5/800''' – 800 W, 30 MHz Power tetrode, 7.5 V/22.6 A filament, B5K 5-pin base with anode on top pin*'''TA1/40''' – 1 kV, 70 W Radiation-cooled power triode, 10 V/5.5 A filament, 3-pin base with anode on top cap*'''TA20/250''' – 20 kV, 130 kW, 3 MHz Water-cooled power triode, 35 V/420 A filament*'''TB04/10''' – 10 W Directly heated power triode, 6-7.5 V/1.25 A filament, 4-pin base*'''TB1/50''' – 125 W Directly heated power triode, 10 V/3.25 A filament, special 4-pin base*'''TB1/60A''' (A4A base), '''TB1/60G''' (American UX4 base) – 125 W Directly heated power triode, 10 V/3.25 A filament, anode and control grid on top caps*'''TC04/10''' – 10 W, 15 MHz RF power triode, 4 V/1.1 A filament, A4A 4-pin base*'''TC05/25''' – 6 W, 2 MHz RF power triode, 4 V/2 A filament, 4-pin base*'''TC1/40''' – 40 W, 3 MHz RF power triode, 6 V/1.1 A filament, 4-pin base*'''TC1/75''' – 75 W, 7.5 MHz RF power triode, 10 V/1.6 A filament, 4-pin base with anode and control grid on top caps*'''Г-811''' ⟼ '''G-811''' = '''811''' – Directly heated RF power triode*'''ГИ-22''' ⟼ '''GI-22''' – Miniature pulse-rated ceramic/metal disk-seal planar UHF triode*'''ГМ-100''' ⟼ '''GM-100''' – 1 kW Modulator triode*'''ГС-13''' ⟼ '''GS-13''' – Miniature ceramic/metal disk-seal planar UHF triode*'''ГШ-2''' ⟼ '''GSha-2''' – Gas-filled noise diode*'''ГШП-3Г-1''' ⟼ '''GShaP-3G-1''' – Vacuum noise diode*'''FC141''' – Heptode pentagrid converter, 1.4 V/50 mA filament, MazdaOctal base*'''TH41''' (4 V/1.3 A heater), '''TH233''', '''TH2320''', '''TH2321''' (23 V/200 mA heater) – Triode/heptode oscillator/mixer, MazdaOctal base with heptode control grid on top cap*'''TP22''', '''TP23''', '''TP25''', '''TP26''' (2 V filament), '''TP2620''' (26 V/200 mA heater) – Triode/pentode oscillator/mixer, pentode control grid on top cap*'''06Ж6Б''' ⟼ '''06J6B''' – Subminiature AF pentode, 625 mV filament*'''06П2Б''' ⟼ '''06P2B''' – Subminiature AF power pentode, 625 mV filament*'''1А1П''' ⟼ '''1A1P''' = '''1R5''' – Heptode pentagrid converter*'''1А2П''' ⟼ '''1A2P''' – Heptode pentagrid converter*'''1Б1П''' ⟼ '''1B1P''' = '''1S5''' – Diode + AF pentode*'''1Б2П''' ⟼ '''1B2P''' – Diode + AF pentode*'''1Ж17Б''' ⟼ '''1J17B''' – 60 MHz Subminiature pentode*'''1Ж18Б''' ⟼ '''1J18B''' – 60 MHz Subminiature pentode*'''1Ж24Б''' ⟼ '''1J24B''' – 60 MHz Subminiature pentode*'''1Ж29Б''' ⟼ '''1J29B''' – 60 MHz Subminiature pentode*'''1Ж30Б''' ⟼ '''1J30B''' – Subminiature, low (12.6-25 V) anode voltage, [[#Dual-control|{{color|Green|dual-control}}]] RF mixer pentode*'''1Ж37Б''' ⟼ '''1J37B''' – 60 MHz Subminiature, triple-control mixer pentode, all-glass round cross-section envelope, 6+1 wire-ends*'''1Ж42А''' ⟼ '''1J42A''' – 60 MHz Subminiature, low (12.6-20 V) anode voltage, dual-control pentode*'''1И1П''' ⟼ '''1I1P''' – 30 MHz Common cathode triode/hexode oscillator/mixer*'''1К1П''' ⟼ '''1K1P''' = '''1T4''' – Remote-cutoff RF/IF pentode*'''1К2П''' ⟼ '''1K2P''' – Remote-cutoff RF/IF pentode*'''1К12Б''' ⟼ '''1K12B''' – Subminiature, remote-cutoff RF pentode*'''1Н3С''' ⟼ '''1N3S''' = '''1G6-G''' – 1 W Dual RF/AF triode*'''1П2Б''' ⟼ '''1P2B''' – Subminiature AF power pentode*'''1П3Б''' ⟼ '''1P3B''' – Subminiature AF power pentode*'''1П4Б''' ⟼ '''1P4B''' – Subminiature AF power pentode*'''1П5Б''' ⟼ '''1P5B''' – Subminiature RF power pentode*'''1П22Б''' ⟼ '''1P22B''' – 60 MHz Subminiature power pentode*'''1П24Б''' ⟼ '''1P24B''' – Subminiature RF power pentode*'''1С12П''' ⟼ '''1S12P''' – RF Triode*'''1Ц1С''' ⟼ '''1C1S''' – TV CRT EHT rectifier*'''1Ц7С''' ⟼ '''1C7S''' = '''1B3-GT/1G3-GT/DY30''' – TV CRT EHT rectifier*'''1Ц11П''' ⟼ '''1C11P''' – TV CRT EHT rectifier*'''1Ц21П''' ⟼ '''1C21P''' = '''1S2/DY86''' – TV CRT EHT rectifier*'''2Д1С''' ⟼ '''2D1S''' – UHF Noise diode; derived from Telefunken/Luftwaffe LG16*'''2Д9С''' ⟼ '''2D9S''' – High-stability, precision diode*'''2Ж2М''' ⟼ '''2J2M''' – RF Pentode*'''2Ж14Б''' ⟼ '''2J14B''' – Subminiature RF pentode*'''2Ж15Б''' ⟼ '''2J15B''' – Subminiature RF pentode*'''2Ж27Л''', '''2Ж27П''' ⟼ '''2J27L''', '''2J27P''' – 120 MHz Pentode; derived from Telefunken RV2,4P700*'''2К2М''' ⟼ '''2K2M''' – Remote-cutoff RF pentode*'''2П1П''' ⟼ '''2P1P''' = '''3S4/DL92''' – 200 mW AF beam power tetrode*'''2П5Б''' ⟼ '''2P5B''' – Subminiature RF power pentode*'''2П9М''' ⟼ '''2P9M''' – RF Beam power tetrode*'''2П19Б''' ⟼ '''2P19B''' – Subminiature RF power pentode*'''2П29Л''', '''2П29П''' ⟼ '''2P29L''', '''2P29P''' – 120 MHz Power pentode*'''2С14Б''' ⟼ '''2S14B''' – Subminiature RF triode*'''2С49Д''' ⟼ '''2S49D''' – 600 MHz ''Pencil''-type triode*'''2Х1Л''' ⟼ '''2H1L''' – Dual diode*'''2Ц2С''' ⟼ '''2C2S''' = '''2X2/879''' – Oscilloscope CRT EHT rectifier*'''3Ц16С''' ⟼ '''3C16S''' = '''3B2''' – TV CRT EHT rectifier*'''3Ц18П''' ⟼ '''3C18P''' – TV CRT EHT rectifier*'''3Ц22S''' ⟼ '''3C22S''' – TV CRT EHT rectifier*'''4Ж1Л''' ⟼ '''4J1L''' – 200 MHz Pentode*'''4П1Л''' ⟼ '''4P1L''' – 120 MHz Power pentode*'''4С3С''' ⟼ '''4S3S''' – 100 MHz Triode*'''5Ц4С''' ⟼ '''5C4S''' = '''5Z4-G/GZ30''' – Full-wave rectifier*'''5Ц8С''' ⟼ '''5C8S''' – Half-wave rectifier*'''5Ц9С''' ⟼ '''5C9S''' – Full-wave rectifier*'''5Ц12П''' ⟼ '''5C12P''' – Half-wave rectifier*'''6А2П''' ⟼ '''6A2P''' = '''6BE6/EK90''' = Shuguang '''6A2''' – Heptode [[pentagrid converter]]*'''6А3П''' ⟼ '''6A3P''' = '''[[#6BN6/6KS6|{{color|Green|6BN6/6KS6}}]]''' – ''Gated-beam discriminator'' pentode*'''6А4П''' ⟼ '''6A4P''' – Heptode pentagrid converter*'''6В1П''' ⟼ '''6V1P''' – Secondary emission pulse pentode for use in digital circuitry*'''6В2П''' ⟼ '''6V2P''' – Secondary emission pulse tetrode for use in digital circuitry*'''6В3С''' ⟼ '''6V3S''' – Secondary emission pulse tetrode for use in digital circuitry*'''6Г1''' ⟼ '''6G1''' = '''6SR7''' – Dual diode + AF triode*'''6Г2''' ⟼ '''6G2''' = '''6SQ7''' – Dual diode + AF triode*'''6Г3П''' ⟼ '''6G3P''' – Dual diode + AF triode*'''6Г7''' ⟼ '''6G7''' = '''6Q7''' – Dual diode + AF triode:*'''6Г7С''' ⟼ '''6G7S''' = '''6Q7-GT''' – Dual diode + AF triode*'''6Д3Д''' ⟼ '''6D3D''' = '''2B22''' = '''559''' – UHF Diode*'''6Д4Ж''' ⟼ '''6D4J''' = '''9004''' – 300 MHz ''Acorn''-type diode*'''6Д6А''' ⟼ '''6D6A''' – 300 MHz Subminiature diode*'''6Д10Д''' ⟼ '''6D10D''' – UHF Diode for use as [[frequency multiplier]]*'''6Д13Д''' ⟼ '''6D13D''' – UHF Precision diode*'''6Д14П''' ⟼ '''6D14P''' – CRT horizontal deflection output booster/damper/efficiency diode*'''6Д15Д''' ⟼ '''6D15D''' – 15 GHz ''Rocket''-type diode*'''6Д16Д''' ⟼ '''6D16D''' – UHF Pulse diode*'''6Д20П''' ⟼ '''6D20P''' = '''6V3A''' (EY81) – CRT horizontal deflection output booster/damper/efficiency diode*'''6Д22С''' ⟼ '''6D22S''' – CRT horizontal deflection output booster/damper/efficiency diode*'''6Е1П''' ⟼ '''6Ye1P''' = '''6BR5/EM80''' – Side-view, fan-type tuning indicator*'''6Е2П''' ⟼ '''6Ye2P''' – Side-view, dual band-type tuning/level indicator*'''6Е3П''' ⟼ '''6Ye3P''' = '''6DH7/6FG6/EM84''' – Side-view, band-type tuning/level indicator*'''6Е5С''' ⟼ '''6Ye5S''' = '''6E5''' – Top-view, "Magic Eye"-type tuning indicator*'''6Ж1Б''' ⟼ '''6J1B''' = '''5702''' – Subminiature RF/IF pentode*'''6Ж2Б''' ⟼ '''6J2B''' (5639) – Subminiature RF/pulse pentode*'''6Ж2П''' ⟼ '''6J2P''' = '''6AS6''' – Wideband RF pentode*'''6Ж3''' ⟼ '''6J3''' = '''6SH7''' – RF/Video Pentode*'''6Ж3П''' ⟼ '''6J3P''' = '''6AG5/EF96''' – 400 MHz Pentode*'''6Ж4''' ⟼ '''6J4''' = '''6AC7''' – Dual-control RF/IF/mixer pentode*'''6Ж5Б''' ⟼ '''6J5B''' – Subminiature RF pentode*'''6Ж5П''' ⟼ '''6J5P''' = '''6AH6''' – Dual-control RF beam tetrode for use as mixer*'''6Ж8''' ⟼ '''6J8''' – RF Pentode*'''6Ж9Б''' ⟼ '''6J9B''' – Subminiature, wideband RF pentode*'''6Ж9П''' ⟼ '''6J9P''' = '''6688/E180F''' – Sharp-cutoff, wideband RF pentode*'''6Ж10Б''' ⟼ '''6J10B''' – Subminiature RF pentode*'''6Ж10П''' ⟼ '''6J10P''' – Dual-control, wideband RF pentode*'''6Ж11П''' ⟼ '''6J11P''' – Wideband RF pentode*'''6Ж20П''' ⟼ '''6J20P''' – Wideband RF pentode*'''6Ж21П''' ⟼ '''6J21P''' – Wideband RF pentode*'''6Ж22П''' ⟼ '''6J22P''' – Wideband, pulse RF pentode*'''6Ж23П''' ⟼ '''6J23P''' – Split-anode, sharp-cutoff, wideband RF pentode*'''6Ж31Б-К''' ⟼ '''6J31B-K''' – Subminiature, low-noise RF pentode*'''6Ж32Б''' ⟼ '''6J32B''' – Subminiature RF pentode*'''6Ж32П''' ⟼ '''6J32P''' (6BK8/6CF8/EF86) – Low-noise AF pentode*'''6Ж33А''' ⟼ '''6J33A''' – Subminiature RF pentode*'''6Ж35Б''' ⟼ '''6J35B''' – Subminiature, dual-control RF/pulse pentode*'''6Ж38П''' ⟼ '''6J38P''' – Wideband RF pentode*'''6Ж40П''' ⟼ '''6J40P''' – Low (12.6-25 V) anode voltage, dual-control RF pentode with a sharp-cutoff control grid and a remote-cutoff suppressor grid for AGC*'''6Ж43П''' ⟼ '''6J43P''' – Split-anode, wideband RF pentode*'''6Ж45Б-В''' ⟼ '''6J45B-V''' – Subminiature RF low-power pentode*'''6Ж46Б-В''' ⟼ '''6J46B-V''' – Subminiature, dual-control RF pentode*'''6Ж49П-Д''' ⟼ '''6J49P-D''' – High-μ RF pentode*'''6Ж50П''' ⟼ '''6J50P''' – Very high-μ RF pentode*'''6Ж51П''' ⟼ '''6J51P''' = '''6EJ7/EF184''' – RF Pentode*'''6Ж52П''' ⟼ '''6J52P''' – High-μ RF pentode*'''6Ж53П''' ⟼ '''6J53P''' – High-μ RF pentode*'''6И1П''' ⟼ '''6I1P''' = '''6AJ8/ECH81''' – Remote-cutoff common cathode triode/heptode oscillator/mixer*'''6И3П''' ⟼ '''6I3P''' – Common cathode triode/heptode oscillator/mixer*'''6И4П''' ⟼ '''6I4P''' = '''6V9/ECH200''' – Common cathode triode/heptode oscillator/mixer*'''6К1Б''' ⟼ '''6K1B''' – Subminiature, remote-cutoff RF pentode*'''6К1П''' ⟼ '''6K1P''' = '''9003''' – Remote-cutoff RF pentode*'''6К3''' ⟼ '''6K3''' = '''6SK7''' – Remote-cutoff RF/IF pentode*'''6К4''' ⟼ '''6K4''' = '''6SG7''' – Remote-cutoff RF/IF pentode*'''6К4П''' ⟼ '''6K4P''' (6BA6/EF93) – Remote-cutoff RF/IF pentode for use in car radios*'''6К6А''' ⟼ '''6K6A''' – Subminiature, remote-cutoff RF pentode*'''6К7''' ⟼ '''6K7''' – Remote-cutoff RF pentode*'''6К8П''' ⟼ '''6K8P''' = '''6ES6/EF97''' – Low (12.6-25 V) anode voltage, dual-control, remote-cutoff RF mixer pentode*'''6К11Б-К''' ⟼ '''6K11B-K''' – Subminiature low-noise, remote-cutoff RF pentode*'''6К13П''' ⟼ '''6K13P''' = '''6EH7/EF183''' – Remote-cutoff RF pentode*'''6К14Б-В''' ⟼ '''6K14B-V''' – Ruggedized, subminiature remote-cutoff RF pentode*'''6Л1П''' ⟼ '''6L1P''' – [[Nonode]] for FM [[Detector (radio)#Quadrature detector|quadrature demodulation]]*'''6Н4П''' ⟼ '''6N4P''' = '''6AY7''' – Dual AF triode*'''6Н5П''' ⟼ '''6N5P''' – Dual vari-μ RF triode*'''6Н5С''' ⟼ '''6N5S''' = '''6AS7-G''' – Dual low-μ triode for use as series-pass voltage regulator*'''6Н6П''' ⟼ '''6N6P''' – Dual low-μ AF triode*'''6Н7С''' ⟼ '''6N7S''' = '''6N7-GT''' – Common cathode dual RF power triode, 10 W in Class-B<sub>2</sub>*'''6Н10С''' ⟼ '''6N10S''' – Common cathode dual RF triode*'''6Н12С''' ⟼ '''6N12S''' – Dual AF power triode*'''6Н15П''' ⟼ '''6N15P''' = '''6J6/ECC91''' – Common cathode dual RF triode*'''6Н16Б''' ⟼ '''6N16B''' – Subminiature dual RF/AF triode*'''6Н17Б''' ⟼ '''6N17B''' – Subminiature dual AF triode*'''6Н18Б''' ⟼ '''6N18B''' – Subminiature dual triode for use as [[Miller effect|Miller]] [[integrator]]s*'''6Н19П''' ⟼ '''6N19P''' – Dual RF/Pulse triode*'''6Н21Б''' ⟼ '''6N21B''' – Subminiature dual AF triode*'''6Н26П''' ⟼ '''6N26P''' – Dual RF/Pulse triode*'''6Н27П''' ⟼ '''6N27P''' = '''6GM8/ECC86''' – Low (12.6-25 V) anode voltage, dual RF triode*'''6Н28Б-В''' ⟼ '''6N28B-V''' – Dual AF triode*'''6Н30П''' ⟼ '''6N30P''' – Dual high-μ triode*'''6Н31П''' ⟼ '''6N31P''' – Dual triode:*'''6П3С-Е''' ⟼ '''6P3S-Ye''' (5881/6L6-WGB) – Long-life version of 6П3С*'''6П6С''' ⟼ '''6P6S''' = '''[[6V6]]-GT''' – AF Beam power tetrode*'''6П7С''' ⟼ '''6P7S''' = '''6BG6''' – CRT horizontal deflection beam power tetrode*'''6П9''' ⟼ '''6P9''' = '''6AG7''' – CRT cathode drive pentode*'''6П13С''' ⟼ '''6P13S''' – CRT horizontal deflection beam power tetrode*'''6П15П''' ⟼ '''6P15P''' (6CK6/EL83) – CRT cathode drive pentode*'''6П18П''' ⟼ '''6P18P''' = '''6DY5/EL82''' – AF Power pentode*'''6П20С''' ⟼ '''6P20S''' = '''6CB5A''' – CRT horizontal deflection beam power tetrode*'''6П21С''' ⟼ '''6P21S''' (5516) – RF Beam power tetrode*'''6П23П''' ⟼ '''6P23P''' – RF Beam power tetrode*'''6П25Б''' ⟼ '''6P25B''' – 750 mW Subminiature AF power pentode*'''6П30Б''' ⟼ '''6P30B''' – Subminiature RF/AF power pentode*'''6П31С''' ⟼ '''6P31S''' = '''6CM5/EL36''' – CRT horizontal deflection beam power tetrode*'''6П33П''' ⟼ '''6P33P''' = '''6CW5/EL86''' – AF Power pentode*'''6П34С''' ⟼ '''6P34S''' – Pulse beam power tetrode*'''6П36С''' ⟼ '''6P36S''' = '''6GB5/EL500''' – CRT horizontal deflection beam power tetrode*'''6П42С''' ⟼ '''6P42S''' – CRT horizontal deflection beam power tetrode*'''6П44С''' ⟼ '''6P44S''' – CRT horizontal deflection beam power tetrode*'''6Р2П''' ⟼ '''6R2P''' – 300 MHz Dual beam power tetrode*'''6Р3С''' ⟼ '''6R3S''' – Dual AF beam power tetrode*'''6Р4П''' ⟼ '''6R4P''' – 300 MHz Dual beam power tetrode*'''6Р5П''' ⟼ '''6R5P''' – 300 MHz Dual beam power tetrode*'''6С1П''' ⟼ '''6S1P''' = '''9002''', '''6C1Ф''' – RF Triode*'''6С2Б''' ⟼ '''6S2B''' – Subminiature, grounded-grid RF triode*'''6С2П''' ⟼ '''6S2P''' = '''6J4/EC98''' – Grounded-grid RF triode*'''6С2С''' ⟼ '''6S2S''' = '''6J5-GT''' – AF Triode*'''6С3Б''' ⟼ '''6S3B''' (6K4A) – Subminiature AF triode*'''6С3П''' ⟼ '''6S3P''' – High-μ, low-noise RF triode*'''6С4П''' ⟼ '''6S4P''' – High-μ, low-noise, grounded-grid RF triode*'''6С4С''' ⟼ '''6S4S''' = '''6B4-G''' – Directly heated AF power triode*'''6С5С''' ⟼ '''6S5S''' = '''6C5-G''' – RF Triode*'''6С6Б''' ⟼ '''6S6B''' – Subminiature RF/AF triode*'''6С7Б''' ⟼ '''6S7B''' – Subminiature AF triode*'''6С8С''' ⟼ '''6S8S''' – Pulse oscillator triode*'''6С9Д''' ⟼ '''6S9D''' – 900 MHz ''Lighthouse''-type triode*'''6С13Д''' ⟼ '''6S13D''' – Coaxial UHF triode*'''6С15П''' ⟼ '''6S15P''' – High-μ RF triode*'''6С17К''' ⟼ '''6S17K''' – 4 GHz Coaxial triode*'''6С18С''' ⟼ '''6S18S''' – AF power triode for use as series-pass voltage regulator*'''6С20С''' ⟼ '''6S20S''' = '''6BK4''' – Power triode for use as EHV shunt regulator in color TV receivers*'''6С26Б-К''' ⟼ '''6S26B-K''' – Subminiature pulse triode*'''6С27Б-К''' ⟼ '''6S27B-K''' – Subminiature RF/Pulse triode*'''6С28Б-В''' ⟼ '''6S28B-V''' – Subminiature, high-μ RF triode*'''6С29Б-В''' ⟼ '''6S29B-V''' – Subminiature, grounded-grid, high-μ RF triode*'''6С31Б''' ⟼ '''6S31B''' – High-μ triode*'''6С32Б''' ⟼ '''6S32B''' – Triode*'''6С34А''' ⟼ '''6S34A''' – Subminiature RF/AF triode*'''6С35А''' ⟼ '''6S35A''' – Subminiature RF/AF triode*'''6С37Б''' ⟼ '''6S37B''' – Subminiature AF/Pulse triode*'''6С40П''' ⟼ '''6S40P''' – 20 kV Power triode for use as EHV shunt regulator in color TV receivers*'''6С45П''' ⟼ '''6S45P''' – High-μ RF triode*'''6С56П''' ⟼ '''6S56P''' – Low-μ triode for use as series-pass voltage regulator*'''6С58П''' ⟼ '''6S58P''' – High-μ RF triode*'''6С59П''' ⟼ '''6S59P''' – High-μ, grounded-grid RF triode*'''6Ф1П''' ⟼ '''6F1P''' = '''6BL8/ECF80''' – Separate cathodes triode + pentode*'''6Ф3П''' ⟼ '''6F3P''' = '''6BM8/ECL82''' – Separate cathodes AF triode + pentode*'''6Ф4П''' ⟼ '''6F4P''' = '''6DX8/ECL84''' – Separate cathodes AF triode + Video pentode*'''6Ф5П''' ⟼ '''6F5P''' = '''6GV8/ECL85''' – Separate cathodes triode + pentode, for use in CRT vertical deflection circuits*'''6Ф12П''' ⟼ '''6F12P''' – Separate cathodes AF triode + pentode*'''6Х2П''' ⟼ '''6H2P''' = '''6AL5/EAA91''' – Dual diode*'''6Х6С''' ⟼ '''6H6S''' = '''6H6-GT''' – Dual diode*'''6Х7Б''' ⟼ '''6H7B''' – Dual diode*'''6Ц4П''' ⟼ '''6C4P''' (6X4/6BX4/EZ90) – Full-wave rectifier*'''6Ц5С''' ⟼ '''6C5S''' = '''6X5-GT/EZ35''' – Full-wave rectifier*'''6Ц10П''' ⟼ '''6C10P''' – CRT horizontal deflection output booster/damper/efficiency diode*'''6Ц13П''' ⟼ '''6C13P''' – Half-wave rectifier*'''6Ц17С''' ⟼ '''6C17S''' – CRT horizontal deflection output booster/damper/efficiency diode*'''6Ц19П''' ⟼ '''6C19P''' – CRT horizontal deflection output booster/damper/efficiency diode*'''6Э5П''' ⟼ '''6E5P''' – 200 MHz RF/Video tetrode*'''6Э6П-Е''' ⟼ '''6E6P-Ye''' – RF Power tetrode*'''6Э7П''' ⟼ '''6E7P''' – Power tetrode for use as series-pass voltage regulator*'''5AV8''' – Medium-μ triode + sharp-cutoff pentode, 4.7 V heater, Noval base*'''5DH8''' – High-μ triode + sharp-cutoff pentode, 5.2 V heater, Noval base*'''10EG7''' – Dual dissimilar triode, 9.7 V heater, Octal base*'''10JA8/10LZ8''' – 6JA8 High-μ triode + sharp-cutoff pentode with a 10.5 V heater, Noval base, for use as sync separator/clipper, phase inverter and CRT cathode driver*'''10JY8''' – Medium-μ triode + sharp-cutoff pentode, 10.5 V heater, Noval base, for use as sync separator/clipper, phase inverter and CRT cathode driver*'''16AQ3/XY88''' – EY88/6AL3, LY88/20AQ3 or PY88/30AE3 CRT horizontal deflection output booster/damper/efficiency diode with a 16 V heater*'''17LD8''' – Medium-μ triode + remote-cutoff pentode, 16.8 V, Neonoval base, for use as vertical deflection oscillator and amplifier in TV receivers heater*'''18A5''' – Beam power pentode, 18.5 V heater, Octal base, for use as horizontal deflection amplifier*'''18FW6''', '''18FW6A''' – Semiremote-cutoff RF/IF pentode, 18 V heater, Miniature 7-pin base*'''18GD6''' – Sharp-cutoff RF/IF pentode, 18 V heater, Miniature 7-pin base*'''19HV8''' – AF triode + IF pentode, 18.9 V heater, Noval base*'''25CD6-GA''', '''25CD6-GB''', '''25EC6''' (110° deflection) – 6CD6 Beam power pentode with a 25 V heater, Octal base, for use as horizontal deflection amplifier*'''32ET5''' – Beam power tetrode, 32 V heater, Miniature 7-pin base*'''33GY7''' – ''Compactron'' Booster/damper/efficiency diode + beam power pentode, 33.6 V heater*'''35GL6''' – AF Beam power tetrode with a heater tap for a pilot lamp*'''50FK5''' – AF Power pentode, 50 V heater, Miniature 7-pin base*'''1B22''', '''1B29''', '''1B31''', '''1B42''' – Hydrogen+Argon-filled spark gaps for use as pulse modulator*'''1B26''', '''1B27''' – TR cells*'''1B32''', '''1B34''' – Gas-filled spark gaps*'''1B35''', '''1B36''', '''1B37''', '''1B38''' – TR cells*'''1B40''', '''1B62''' – Gas-filled microwave switching tubes*'''1B43''' – Gas-filled spark gap*'''1B44''' – ATR cell*'''1B48''' – 2.7 kV, 50 mA Gas-filled rectifier*'''1B51''', '''1B52''', '''1B53''', '''1B54''', '''1B55''', '''1B56''', '''1B57''', '''1B58''' – TR/ATR/PTR cells*'''1B60''', '''1B63''', '''1B63A''' = '''WF45''', '''1B63B''' – TR cells*'''1B67''', '''1B68''' (β, γ), '''1B69''', '''1B70''', '''1B71''', '''1B72''', '''1B73''', '''1B74''' (Argon, γ), '''1B75''' (Argon, β), '''1B76''' (Neon, β), '''1B77''' (Argon, β), '''1B78''', '''1B79''' (Argon), '''1B80''' (Neon), '''1B81''' (Argon), '''1B83''', '''1B84''', '''1B85''' (β, γ), '''1B86''' (300-volts ''Thyrode'', γ), '''1B87''' (γ), '''1B88''' (300-volts ''Thyrode'', γ), '''1B89''' (X-rays, [[Beryllium]] window), '''1B90''' (β, γ), '''1B97''', '''1B98''', '''1B99''', '''1B100''' (Neon), '''1B102''' (''Thyrode'', β), '''1B105''' (Neon), '''1B106''' (''Thyrode'', β), '''1B124''' (''Thyrode'', γ) – Self-quenching radiation counter tubes*'''1B125''' – ''Thyrode'' Radiation counter tube for studying [[cosmic ray]]s, [[prospecting]] radioactive ores from aircraft or other fast-moving vehicles, or for [[Environmental monitoring#Radiological|environmental monitoring]]*'''1B126''' – Needle-shaped ''Thyrode'' radiation counter used in [[neurosurgery]] to [[Radioactive tracer|trace]] [[Iodine-123|<sup>123</sup>Iodine]]*'''1C21''' – 180 V, 25 mA<sub>{{Abbr|avg|average}}</sub>, 100 mA<sub>peak</sub> Cold-cathode triode thyratron, 6-pin Octal base*'''1P21''' (S4), '''1P22''' (S5) – 9-stage side-on [[Photomultiplier tube|photomultiplier]], 11-pin Submagnal base*'''1P23''' – Gas-filled S1 side-on phototube, 4-pin base*'''1P24''' – S4 phototube, cartridge type*'''1P26''', '''1P27''', '''1P30''' – S1 Side-on phototubes, UX4 base*'''1P28''' – 9-Stage S5 side-on photomultiplier, 11-pin Submagnal base*'''1P31''' (2 Wires with banana plugs), '''1P32''', '''1P35''' (3-pin PeeWee base), '''1P33''', '''1P34''', '''1P36''' (UX4 base) – Gas-filled S1 side-on phototubes*'''1P37''' – Gas-filled S4 phototube, 4-pin base*'''1P40''' – Gas-filled, red/IR-sensitive phototube; 930 with a non-hygroscopic 5-pin base*'''1P41''' – Gas-filled S1 head-on phototube, 3-pin ''PeeWee'' base*'''1P42''' – S9 Head-on phototube*'''1Q21''' – 9.2-9.3 GHz Tunable reference cavity*'''1Q22''' (9.25 GHz), '''1Q23''' (9.28 GHz), '''1Q24''' (9.31 GHz), '''1Q25''' (9.375 GHz), '''1Q26''', '''1Q26A''' (9.28 GHz Beacon) – Reference cavities*'''1R21''' – 900 V, 200 mA Ignitron*'''2A21''' (6.5-9.5 V/1 A), '''2A22''' (3-8 V/1.7 A) – [[Electrical ballast#Self-variable resistors|Ballast tubes]]*'''2B22''' – 1.5 GHz disk-seal diode*'''2B25''' – Directly heated half-wave rectifier, Miniature 7-pin base*'''2C26''', '''2C26A''' – Triode, indirect 6.3 V/1.1 A heater, Octal base, grid and anode on separate top caps*'''2C33''' – 1.25 kV, 25 mA<sub>avg</sub>, 1.5 A<sub>peak</sub> Argon-filled, indirectly heated triode thyratron, negative starter voltage, Octal base*'''2C34''' – 2×5 W Dual power triode, indirect 6.3 V/600 mA heater, Octal base with two anode top caps*'''2E24''' – VHF [[Beam tetrode|Beam power tetrode]], center-tapped 6.3 V/650 mA filament, ''Micanol'' Octal base*'''2E25''' – 15 W, 100 MHz Beam power tetrode, 6.3 V/1 A instant heater, Octal base*'''2J21''' – Forced-air cooled pulse Magnetron, 6.3 V/1.2-1.4 A heater*'''2J42''' – Forced-air cooled Magnetron, 6.3 V/600 mA heater*'''2J49''', '''2J50''' – Magnetrons, 6.3 V/1 A heater*'''2J51''', '''2J51A''' – Magnetron, 6.3 V/0.9-1 A heater*'''2K26''' – 6.25-7.06 GHz Reflex Klystron, 6.3 V/440 mA heater, 4-pin Octal base*'''2K29''' – Reflex Klystron, 6.3 V/440 mA heater, modified Octal base*'''2K31''' – 2.7-3.3 GHz 2-Cavity Klystron, 6.3 V/1.3 A heater, Octal base*'''2K33''' – 23-25 GHz Reflex Klystron, 6.3 V/650 mA heater, 4-pin Octal base*'''2K34''', '''2K35''' – 2.73-3.33 GHz 3-Cavity Klystrons, 6.3 V/1.5 A heater, Octal base*'''2K39''' (7.55-10.3 GHz), '''2K41''' (2.66-3.31 GHz), '''2K42''' (3.3-4.2 GHz), '''2K43''' (4.2-5.7 GHz), '''2K44''' (5.7-7.5 GHz) – Reflex Klystrons, 6.3 V/1.3 A heater*'''2K45''' – 30 mW, 8.5-9.66 GHz Reflex Klystron with thermal tuning - one wall of the cavity is also the anode of a triode, so increasing the triode current results in thermal expansion of that wall, altering the cavity geometry, 6.3 V/760 mA heater*'''2K51''' (2.7-3.3 GHz), '''2K52''' (2.9-3.7 GHz), '''2K53''' (3.2-4 GHz) – 2-Cavity Klystrons, 6.3 V/1.4 A heater, Octal base*'''2K56''' – 3.84-4.46 GHz Reflex Klystron, 6.3 V/440 mA heater, Octal base*'''2K57''' – 4.82-5.12 GHz Reflex Klystron, 6.3 V/1.5 A heater, Octal base*'''2J70''' – Forced-air cooled pulse Magnetron, 6.3 V/1.1-1.4 A heater*'''3B21''', '''3B22''' – 725 V, 1.25 A<sub>avg</sub>, 5 A<sub>peak</sub> Xenon half-wave rectifiers, 2.5 V/6 A filament*'''3B23''' – Full-wave rectifier, 2.5 V/8 A heater*'''3B25''' – Gas-filled half-wave rectifier, 2.5 V/5 A filament, 4-pin base*'''3B26''' – Clipper diode, indirect 2.5 V/4.75 A heater, Octal base*'''3B27''' – Half-wave rectifier, half-indirect 2.5 V/5 A heater with a split cathode, 4-pin base*'''3B29''' – Half-wave rectifier, half-indirect 2.5 V/4.9 A heater, 4-pin base*'''3C24''', '''3C28''', '''3C34''' – 25 W, 60 MHz power triodes, 6.3 V/3 A filament*'''3C27B''', '''3C37''' – Coaxial triodes, 6.3 V/2.5 A heater*'''3C36''' – 500 W, 1.5 GHz Water-cooled disk-seal power triode, 6.3 V/2.8 A heater*'''3D23''' – RF Power tetrode, direct 6.3 V/3 A filament, 4-pin base with anode on top cap*'''3D24''' – VHF Power tetrode, direct 6.3 V/3 A filament, Loctal base with anode on top cap*'''3E22''' – Dual RF beam power tetrode, center-tapped 12.6 V/800 mA resp. 6.3 V/1.6 A heater, Octal base*'''3J21''', '''3J22''', '''3J31''' – Magnetrons*'''3K21''' (2.3-2.725 GHz), '''3K22''' (3.3-4 GHz), '''3K30''' (2.7-3.3 GHz) – 2-Cavity Klystrons, Octal base*'''3K23''' (950-1150 MHz), '''3K27''' (750-960 MHz) – Reflex Klystrons, Octal base*'''4A21''' – 11-15 V/1.62 mA Ballast tube*'''4B22''' = '''EL5B''', '''4B23''' = '''EL5BHD''' (Heavy duty), '''4B24''' = '''EL3C''', '''4B25''' = '''EL6CF''' – Argon-filled full-wave rectifiers with Graphite anodes*'''4B26''' = '''2000''' – Gas-filled half-wave rectifier, 2.2 V/18 A filament, E39 ''Mogul'' [[Edison screw]] lamp base*'''4B27''' – Gas-filled full-wave rectifier, 2.5 V/10 A filament*'''4B31''' – Half-wave rectifier, half-indirect 5 VAC/5 A heater, B4D Superjumbo base*'''4B36''' – Gas-filled half-wave rectifier, 2 V/12 A filament, E39 ''Mogul'' Edison screw lamp base*'''4C21''' – 100 W, 1 MHz Power triode, 10 V/3.25 A filament, U4J Jumbo base*'''4C25''' – 50 W, 30 MHz Power triode, 5 V/5 A filament, UX4 base*'''4C27''' – 150 W, 600 MHz Power triode, 6 V/6.5 A filament*'''4C28''' – Pulse modulator power triode, 6 V/6.5 A filament, for use in small [[LORAN]] and [[SHORAN]] transmitters*'''4C29''' – 150 W Pulse-rated UHF power triode, 6 V/6.5 A filament*'''4C32''' – 200 W, 60 MHz Power triode for use in shortwave [[diathermy]] generators*'''4C33''' – 250 W, 625 MHz Forced-air cooled, pulse-rated power triode, 5 V/9.1 A heater*'''4C34''' – 250 W, 60 MHz Power triode*'''4C35''' = Philips '''PL435''' = Toshiba '''1G35P''', '''4C35A''' – Hydrogen triode thyratron, 6.3 V/5.5-6.7 A heater, B4D Superjumbo base with Bayonet*'''4C36''' – 125 W, 60 MHz Power triode*'''4D22''', '''4D32''' – Beam power tetrodes, center-tapped 25.2 V/800 mA resp. 12.6 V/1.6 A heater*'''4D23''' – 150 W, 120 MHz Beam power tetrode, B5D/U5G ''Giant 5-pin'' UY base*'''4J21''' (1336-1350 MHz), '''4J22''' (1322-1336 MHz), '''4J23''' (1308-1322 MHz), '''4J24''' (1294-1308 MHz), '''4J25''' (1280-1294 MHz) – 640 kW Pulsed Magnetrons*'''4J26''' (1268-1280 MHz), '''4J27''' (1256-1268 MHz), '''4J28''' (1244-1256 MHz), '''4J29''' (1232-1244 MHz), '''4J30''' (1220-1232 MHz) – 700 kW Pulsed Magnetrons*'''4J36''' (3.65-3.70 GHz), '''4J37''' (3.60-3.65 GHz), '''4J38''' (3.55-3.60 GHz), '''4J39''' (3.50-3.55 GHz), '''4J40''' (3.45-3.50 GHz), '''4J41''' (3.4-3.45 GHz) – 1 kW<sub>avg</sub> Pulsed S-band Magnetrons*'''4J43''' (2.992-3.019 GHz), '''4J44''' (2.965-2.992 GHz) – 750 kW Pulsed Magnetrons*'''4J50''', '''4J50TO''' = CSF '''F1005''', '''4J50TR''' = '''F1103''' – Forced-air cooled Magnetron, 13.75 V/3.5 A heater*'''4J52''' (12.6 V/2.1 A heater), '''4J52A''' (12.6 V/2.2 A heater), 4J52T (ruggedized) – Forced-air cooled Magnetrons*'''4J53''' – 2.793-2.813 GHz, 750 kW Pulsed Magnetrons*'''4J54''' (6.775-6.875 GHz), '''4J55''' (6.675-6.775 GHz), '''4J56''' (6.575-6.675 GHz), '''4J57''' (6.475-6.575 GHz), '''4J58''' (6.375-6.475 GHz), '''4J59''' (6.375-6.275 GHz) – 250 kW Pulsed Magnetrons, 12.6 V/3.25-4 A heater*'''4J70''' (3.54-3.71 GHz), '''4J71''' (3.39-3.56 GHz), '''4J72''' (3.24-3.41 GHz), '''4J73''' (3.09-3.26 GHz) – 350 W<sub>avg</sub> Pulsed Magnetrons*'''4J74''' (2.99-3.11 GHz), '''4J75''' (2.89-3.01 GHz), '''4J76''' (2.79-2.91 GHz), '''4J77''' (2.69-2.81 GHz) – 450 W<sub>avg</sub> Pulsed Magnetrons*'''4J78''' – 4J50 with a 9.03-9.168 GHz range*'''5B21''' – Gas-filled half-wave rectifier, 2.5 V/25 A filament, E39 ''Mogul'' Edison screw lamp base*'''5C21''' = '''C6J''' – Xenon-filled triode thyratron with negative control voltage, 2.5 V/21 A heater, 4-pin base*'''5C30''' – Triode thyratron with negative control voltage, 2.5 V/23 A heater, E39 ''Mogul'' Edison screw lamp base*'''5D21''' – 60 W Beam power tetrode, 26 V/2.1 A heater*'''5D23''' – 140 W, 45 MHz Power tetrode, U4J Jumbo base with Bayonet*'''5J21''' (1198-1110 MHz), '''5J22''' (1186-1198 MHz), '''5J23''' (1074-1186 MHz), '''5J24''' (1062-1074 MHz), '''5J25''' (1050-1062 MHz) – 250 kW Pulsed Magnetrons, 20.5 V/3.4 A heater*'''5J29''' (10-375 MHz), '''5J30''' (375-770 MHz), '''5J32''' (750-1150 MHz), '''5J33''' (90-450 MHz) – 150 W Magnetrons, 2.1 V/40 A heater*'''6B21''' – Half-wave rectifier, 5 VAC/24 A filament, U4J Jumbo base*'''6C23''' – 1 kW, 600 MHz Forced-air cooled, pulse-rated power triode*'''6C24''' – Forced-air cooled power triode, 11 V/12.1 A heater*'''6D21''' – Pulse-rated power tetrode for use in ''hard-tube pulser'' radar modulators*'''6J21''' – 800 W<sub>avg</sub>, 2.5-3.55 GHz Forced-air cooled Magnetrons, 5.6 V/17.2 A heater*'''7C24/5762''' = RCA '''4654''', '''5762A''' – Forced-air cooled power triode, 12.6 V/29 A heater*'''7C25''' – 2.5 kW, 30 MHz Power triode*'''7C26''' – 1 kW, 150 MHz Power triode*'''7C27''' – 3 kW, 110 MHz Power triode*'''7C30''' – 3 kW, 1.6 MHz Power triode*'''8C22''' – 1 kW, 400 MHz Forced-air cooled, pulse-rated power triode*'''8C23''' – 1 kW, 600 MHz Forced-air cooled, pulse-rated power triode*'''9C22''' – Forced-air cooled power triode, 19.5 V/415 A heater*'''9C25''' – Forced-air cooled beam power triode, 6.0 V/285 A heater*'''9C26''' – Forced-air cooled power triode, 6.0 V/285 A heater*'''9C27''' – Water + forced-air cooled power triode, 6.0 V/285 A heater*'''5512''' – 25 kW, 110 MHz Water-cooled RF power triode with integral water jacket*'''5514''' – 65 W RF Power triode with a Zirconium-coated Graphite anode*'''5516''' – 165 MHz, 15 W Directly heated VHF beam power pentode, Zirconium-coated anode, Gold-coated control grid, "[[Carburizing|carbonized]]" screen grid, center-tapped 6 V/700 mA instant heater, [[Dielectric loss|low loss]] [[mica]]-filled [[Phenol formaldehyde resin|phenolic resin]] (''Micanol'')<ref name="Micanol" /> Octal base with anode on top cap*'''5517''' – Gas-filled, half-wave rectifier, Miniature 7-pin base*'''5518''' – 4 kW, 110 MHz Forced-air cooled power triode*'''5519''', '''5520''', '''5521''', '''5522''', '''5523''', '''5532''', '''5533''', '''5534''', '''5535''', '''5536''', '''5537''', '''5538''', '''5539''', '''5540''', '''5599''', '''5600''', '''5601''', '''5602''' – [[X-ray tube]]s*'''5527''' – [[Iconoscope]], 6.3 V/600 mA heater, 12-pin Diheptal base*'''5528''' – Triode thyratron with anode on top cap*'''5530''', '''5530H''' – 4 kW, 110 MHz Forced-air power triode*'''5531''' – 10 kW, 30 MHz Forced-air cooled power triode*'''5541''' – 10 kW, 110 MHz Forced-air cooled power triode*'''5545''' = STC '''3G/501A''' – Gas-filled triode thyratron*'''5550''' (Size A), '''5551''', '''5551A''' (size B, water-cooled), '''5552A''' (size C), '''5553B''' (size D), '''5554''', '''5555''' – Ignitrons*'''5557''' – Mercury-vapor triode thyratron with a negative control characteristic, 2.5 V/5 A heater, 4-pin base*'''5558''' – Mercury-vapor half-wave rectifier, 5 V/4.5 A heater, 4-pin Bayonet base*'''5559''' – Mercury-vapor triode thyratron, 5 V/4.5 A heater, 4-pin Bayonet base*'''5560''' – Mercury-vapor tetrode thyratron, 5 V/4.5 A heater, 4-pin Bayonet base*'''5561''' – Mercury-vapor, half-wave rectifier, 5 V/10 A heater, Superjumbo Bayonet base*'''5563''', '''5563A'''' – Mercury-vapor triode thyratron with a negative control characteristic, 5 V/10 A heater, Jumbo base*'''5575/100''' (1 A), '''5576/200''' (2.5 A) – 150 kV Half-wave rectifier*'''5581''' – Gas-filled, blue-sensitive phototube, 5-pin Octal base*'''5582''' – Cartridge-type gas-filled phototube*'''5583''' – Gas-filled phototube*'''5584''' – Dual gas-filled, blue-sensitive phototube*'''5586''', '''5657''' – Magnetrons, 16.0 V/2.8-3.4 A heater*'''5588''' – Forced-air cooled UHF power triode, 6.3 V/2.5 A heater*'''5589''' – Gas-filled cold-cathode trigger triode, 6-pin Octal base*'''5590''' – Pentode, 6.3 V/150 mA heater, Miniature 7-pin base*'''5591''' – UHF Pentode, 6.3 V/150 mA heater, Miniature 7-pin base*'''5592''' – Forced-air cooled power triode, 11 V/412 A heater, special 4-pin base*'''5594''' – Gas-filled triode thyratron*'''5603''' – Power pentode, 6.3 V/500 mA heater, Octal base*'''5604''', '''5604A''' (Forced-air cooled, 10 kW), '''5619''' (water-cooled, 20 kW) – Forced-air cooled power triode, 11 V/176 A heater*'''5607''' – UHF Magnetron*'''5609''' – Forced-air cooled Magnetron, 6.3 V/3.8 A heater*'''5612''', '''5613''', '''5614''', '''5615''', '''5616''', '''5617''' – Gas-filled S4 phototubes*'''5618''' – VHF Power pentode, center-tapped 6 V/230 mA resp. 3 V/460 mA heater, Miniature 7-pin base*'''5632''' = EEV '''C3J''' = '''ELC3J''' – Xenon-filled triode thyratron with negative control characteristic, 2.5 V/9 A heater, 4-pin base*'''5633''' – Subminiature, remote-cutoff RF pentode, 6.3 V/150 mA heater, all-glass round cross-section envelope, chaotic 6-pin/wire-ends*'''5634''' – Subminiature, sharp-cutoff RF pentode, 6.3 V/150 mA heater, all-glass round cross-section envelope, chaotic 6-pin/wire-ends*'''5636''' – Ruggedized, subminiature, [[#Dual-control|{{color|Green|dual-control}}]], sharp-cutoff pentode, 6.3 V/150 mA heater, all-glass round cross-section E8-10 envelope, circular 8-pin/wire-ends*'''5637''' – Subminiature, high-μ triode, 6.3 V/150 mA heater, all-glass round cross-section envelope, chaotic 5-pin/wire-ends*'''5638''' – Subminiature, sharp-cutoff pentode, 6.3 V/150 mA heater, all-glass round cross-section envelope, chaotic 6-pin/wire-ends*'''5639''', '''5639-WA''' – Ruggedized, subminiature power pentode for use as CRT cathode driver, 6.3 V/450 mA heater, all-glass round cross-section envelope, circular 8-pin/wire-ends*'''5640''' – Subminiature beam power tetrode, 6.3 V/450 mA heater, all-glass round cross-section E8-10 envelope, 6-pin/wire-ends*'''5641''' – Ruggedized, subminiature half-wave rectifier, 6.3 V/450 mA heater, all-glass round cross-section E8-10 envelope, circular 8-pin/wire-ends*'''5642''' – Ruggedized, subminiature half-wave rectifier, 1.25 V/200 mA filament, all-glass envelope, 3-pin/wire-ends*'''5643''' – Subminiature Xenon-filled tetrode thyratron with negative control characteristic, 6.3 V/150 mA heater, all-glass round cross-section E8-10 envelope, circular 8-pin/wire-ends; similar to 5696*'''5644''' – Subminiature 95 V [[voltage-regulator tube]], all-glass round cross-section E8-10 envelope, circular 8-pin/wire-ends*'''5645''' – Subminiature, medium-μ triode, 6.3 V/150 mA heater, all-glass round cross-section envelope, round 5-pin/wire-ends*'''5646''' – Subminiature, high-μ triode, 6.3 V/150 mA heater, all-glass round cross-section envelope, round 5-pin/wire-ends*'''5647''' – Ruggedized, subminiature, indirectly heated diode, 6.3 V/150 mA heater, 4-pin/wire-ends*'''5649''', '''5650''' = '''5981''' – 1.3 GHz Reflex Klystrons*'''5651''' = Cerberus '''SR54''', '''5651A''' (''5651-WA'') – 86 V Voltage-regulator tube,*'''5652''', '''5653''' – S4 Phototube*'''5656''' – Dual RF power tetrode*'''5657''' – See 5586*'''5658''' – Upgraded drop-in replacement for the 880 power triode for use in industrial [[dielectric heating]] applications*'''5659''' – Ruggedized 12A6 beam power tetrode*'''5660''' – Ruggedized 12C8 dual diode + pentode*'''5661''' – Ruggedized 12SK7 pentode*'''5664''' = '''ELC1B/A''' – Xenon-filled triode thyratron with a Tantalum anode*'''5665''' = EEV '''C16J''' = '''ELC16J''' – Xenon-filled triode thyratron with negative control characteristic, 2.5 V/31 A heater*'''5665''' – Thyratron*'''5666''' (Water-cooled, 12.5 kW), '''5667''' (forced-air cooled, 7.5 kW) – Upgraded replacements for the 889A, 889RA power triodes for use in industrial dielectric heating applications*'''5668''' (Water-cooled, 20 kW), '''5669''' (forced-air cooled, 10 kW) – Upgraded replacements for the 892, 892R power triodes for use in industrial dielectric heating applications*'''5670''' – Dual medium-μ RF triode, 6.3 V/350 mA heater, Noval base; [[avionics]] version: ''5670-WA''; similar to 2C51 or 6385*'''5671''' – 25 kW Forced-air cooled power triode*'''5672''' – Subminiature, directly heated power pentode, 1.25 V/50 mA filament, all-glass elliptical cross-section envelope with 5 inline wire-ends*'''5675''' – ''Pencil'' Glass/metal medium-μ triode, 6.3 V/135 mA heater*'''5676''' – Subminiature VHF triode, 1.25 V/120 mA filament, all-glass elliptical cross-section envelope with 5 inline wire-ends*'''5679''' – Dual diode, 6.3 V/150 mA heater, Loctal base*'''5680''' – 2.5 kW, 30 MHz Forced-air cooled power triode*'''5681''' – 75 kW, 30 MHz Water-cooled power triode with coaxial terminals*'''5682''' – 140 kW, 30 MHz Water-cooled power triode with coaxial terminals*'''5683''' – Gas-filled triode thyratron*'''5684''' = = EEV '''C3J/A''' = '''ELC3J/A''' – Xenon-filled triode thyratron with negative control characteristic, 2.5 V/9 A heater, 4-pin base*'''5685''' = EEV '''C6J/A''' = '''ELC6J/A''' – Xenon-filled triode thyratron with negative control characteristic, 2.5 V/21 A heater, 4-pin base*'''5686''' – Beam power tetrode, 6.3 V/350 mA heater, Noval base*'''5687''', '''5687-WA''' – Dual medium-μ triode, center-tapped 12.6 V/450 mA resp. 6.3 V/900 mA heater, Noval base*'''5690''' – Full-wave rectifier, center-tapped 12.6 V/1.2 A resp. 6.3 V/2.4 A heater, Octal base*'''5694''' – Pre-aged 6N7-G dual high-μ triode, Octal base*'''5695''' – Mercury-vapor, half-wave rectifier*'''5703''', '''5703-WA''', '''5703-WB''' – Triode*'''5704''', '''5704-WA''' – Diode*'''5705''' – 10 kW, 30 MHz Water-cooled power triode*'''5710''' – 5 kW, 20 MHz Forced-air cooled power triode*'''5711''' – Oil-cooled X-ray tube*'''5712''' – [[External beam radiotherapy|Superficial therapy]] tubehead with a 5711 inside*'''5713''' – 250 W Forced-air cooled power triode, 3.3 V/11.5 A heater*'''5718''' – Subminiature medium-μ triode, 6.3 V/150 mA heater, all-glass round cross-section envelope, circular 8-pin/wire-ends*'''5719''' – Subminiature low-microphonics, high-μ AF triode, 6.3 V/150 mA heater, all-glass round cross-section envelope, circular 8-pin/wire-ends*'''5722''' – Directly heated, [[Thermionic emission|thermally-limited (=''saturated'') emission]] VHF noise diode, center-tapped 2-5.5 V/1.6 A uncoated Tungsten filament, Miniature 7-pin base*'''5725''' – Sharp-cutoff pentode, 6.3 V/175 mA heater, Miniature 7-pin base; premium version of 6AS6*'''5726''', '''6AL5-W''' = '''E91AA/EAA901S''' – Ruggedized dual RF diode, Silicon-free 6.3 V/300 mA heater, Miniature 7-pin base*'''5728''' = '''FG-67''' – Mercury-vapor triode thyratron*'''5730''' – ''Cyclophon'', a beam deflection, 30-channel analog demultiplexer for telecomms receiving channel banks, internal electrostatic focusing and deflection to determine which one out of 30 anodes receives the electron beam controlled by a common grid*'''5732''' – Ruggedized 6K7 pentode with control grid on top cap*'''5734''', '''5734A''' – Mechano-electronic transducer*'''5736''' – 2.5 kW, 60 MHz Forced-air cooled power triode with coaxial terminals*'''5737''' – 150 kW, 20 MHz Water-cooled power triode*'''5741''' – Radiation-cooled half-wave rectifier*'''5744''', '''5744-WB''' – Subminiature high-μ triode, 6.3 V/200 mA heater, all-glass round cross-section envelope, inline 5-pin/wire-ends*'''5745''', '''5746''', '''5747''', '''5748''' – X-ray tubes*'''5751''', '''5751-WA''' – Dual triode, Noval base*'''5755''' – Dual triode, center-tapped 12.6 V/180 mA resp. 6.3 V/360 mA heater, Noval base*'''5759''' – 1 kW, 150 MHz Forced-air cooled power triode*'''5760''' (Water-cooled), '''5761''' (Forced-air cooled) – 1.5 kW, 150 MHz power triode*'''5762/7C24''' = '''4654''', '''5762A''' – Forced-air cooled power triode, 12.6 V/29 A heater*'''5763''' – 12 W, 175 MHz Beam power tetrode, 6.0 V/750 mA heater, Noval base*'''5764''' – 3.3 GHz ''Rocket''-type disk-seal planar UHF triode, 6.3 V/425 mA heater*'''5765''' – 2.9 GHz ''Rocket''-type disk-seal planar UHF triode, 6.3 V/400 mA heater*'''5766''' – 2C37 ''Rocket''-type disk-seal planar UHF triode with folded anode disk*'''5767''' – 3.3 GHz ''Rocket''-type disk-seal planar UHF triode; 2C37 with folded discs , 6.3 V/400 mA heater*'''5768''' – 3 GHz ''Rocket''-type disk-seal planar high-μ triode, 6.3 V/400 mA heater*'''5769''' – 3" Image Orthicon*'''5770''' – Water+forced-air cooled power triode, 11 V/285 A heater*'''5771''' – Water+forced-air cooled power triode, 7.5 V/170 A heater*'''5780''' – Magnetron*'''5781''', '''5782''' – X-ray tubes*'''5783''', '''5783-WA''', '''5783-WB''' – 85 V Voltage-regulator tube,*'''5785''' – Subminiature directly heated diode, 1.25 V/15 mA filament, all-glass elliptical cross-section envelope with 3 inline wire-ends*'''5786''' – Forced-air cooled power triode, 11 V/12.5 A heater*'''5787''', '''5787-WA''' – 100 V Voltage-regulator tube,*'''5788''' – Ignitron*'''5789''' – Magnetron*'''5790''', '''5791''', '''5792''', '''5793''' – ATR cells*'''5794''', '''5794A/6562''' = '''6562''' – ''Pencil''-type fixed-tuned oscillator triode for Radiosonde Service at 1.68 GHz, 5.2-6.6 V/160 mA heater*'''5795''' – Magnetron*'''5797''' – Ruggedized, subminiature low (26.5-50 V) anode voltage, semiremote-cutoff pentode, 26.5 V/45 mA heater, all-glass round cross-section envelope, circular 8-pin/wire-ends*'''5798''' – Subminiature dual low (26.5-50 V) anode voltage, medium-μ triode, 26.5 V/90 mA heater, all-glass round cross-section envelope, circular 8-pin/wire-ends*'''5799''' – 3 kV/200 µA Subminiature, half-wave rectifier, 1.25 V/10 mA filament*'''5800''', '''5803''' – Subminiature electrometer tetrodes, 1.25 V/10 mA filament*'''5801''' (High-μ), '''5802''' (low-μ) – Subminiature triodes, 1.25 V/10 mA filament*'''5812''' – 10 W, 165 MHz Beam power pentode, instant-heating, center-tapped 6 V/650 mA filament, Miniature 7-pin base*'''5813''' – 1.8" [[Slow-scan television|Slow scan]] Video camera tube*'''5814''', '''5814A''' (''5814-WA'', '''5814-WB''') – Dual medium-μ triode, center-tapped 12.6 V/175 mA resp. 6.3 V/350 mA heater, Noval base; ruggedized version of 12AU7*'''5817''' (4.8-5 GHz), '''5818''' (5-5.2 GHz) – Reflex Klystrons*'''5819''' – 10-Stage S9 photomultiplier, Diheptal 14-pin base*'''5820''', '''5820A''', '''5820A/L''' (Longer-life, non-deteriorating glass target) – 1.8" Image Orthicon, 6.3 V/600 mA heater, Diheptal 14-pin base*'''5821''' – Ignitron*'''5822''', '''5822A''' – Water-cooled Ignitron*'''5823/Z900T''' – Gas-filled, cold-cathode AC trigger triode, Miniature 7-pin base*'''5825''' – Half-wave rectifier, 1.6 V/1.25 A heater, 4-pin base*'''5826''' – 1.6" Image Orthicon, magnetic focus and deflection, 6.3 V/600 mA heater, Diheptal 14-pin base*'''5828''' – Subminiature medium-μ triode, 1.25 V/10 mA filament*'''5831''' – 150 kW Water-cooled high-power beam tetrode, 6 V/2.22 kA heater*'''5833''' – 35 kW, 6 MHz Forced-air cooled power triode*'''5834''', '''5835''' – Half-wave Mercury-vapor rectifiers*'''5838''' (12.6 V/600 mA heater), '''5839''' (26.5 V/255 mA heater), '''5852''' (6.3 V/1.2 A heater) – Full-wave rectifier, 6-pin Octal base*'''5840''' – 6205 Subminiature sharp-cutoff RF pentode with the suppressor grid internally tied to cathode, 6.3 V/150 mA heater, all-glass round cross-section envelope, circular 8-pin/wire-ends*'''5841''' – 900V Corona voltage-regulator tube*'''5842''' = '''417A''' = CSF '''F7004''' – Medium-μ triode for use in grounded-grid amplifiers, 6.3 V/300 mA heater, Noval base; not to be confused with the 7004=TBL2/300 RF power triode*'''5844''' – Dual medium-μ triode, 6.3 V/300 mA heater, Miniature 7-pin base*'''5846''' – 9.28 GHz Reference microwave cavity*'''5847''' = '''404A''', '''5847A''' – Frame-grid, sharp-cutoff pentode, 6.3 V/300 mA heater, Noval base*'''5851''' – Ruggedized, subminiature 400 MHz beam power pentode, center-tapped 2.5 V/55 mA resp. 1.25 V/110 mA filament, all-glass round cross-section envelope, circular 8-pin/wire-ends*'''5852''' – See 5838*'''5853''' – TR cell*'''5854''' – 0.8" Image Iconoscope, 6.3 V/630 mA heater*'''5857''' – [[Secondary emission#Special amplifying tubes|Secondary emission]] VHF hexode, 6.3 V/450 mA heater, Noval base*'''5859''', '''5860''' – X-ray tubes*'''5861/EC55''' = LaRadiotechnique '''R243''' – 10 W, 3 GHz ''Rocket''-type disk-seal power triode, 6.3 V/400 mA heater*'''5864''' – ATR cell*'''5865''' – TR cell*'''5866''' = '''TB2.5/300''' (135 W), '''5866A''' = '''7986''' = '''TB2.5/400''' (150 W) – 150 MHz Radiation-cooled power triode*'''5867''' = '''TB3/750''', '''5867A''' – 350 W, 100 MHz Radiation-cooled power triode*'''5868''' = '''TB4/1250''' – 450 W, 100 MHz Radiation-cooled power triode*'''5869''' – 13 kV Mercury-vapor triode thyratron*'''5870''' – 27 kV Mercury-vapor triode thyratron*'''5871''' – Ruggedized 6V6-GT power pentode*'''5873''' – Subminiature dual medium-μ triode, 6.3 V/300 mA heater, all-glass round cross-section envelope, circular 8-pin/wire-ends*'''5875''' – Subminiature sharp-cutoff pentode, 1.25 V/100 mA filament, all-glass elliptical cross-section envelope with 5 inline wire-ends, for use in ''Radiosonde'' weather balloon transmitters*'''5876''', '''5876A''' – ''Pencil'' Glass/metal high-μ triode, 6.3 V/135 mA heater*'''5877''', '''5878''' – Gas-filled triode thyratrons*'''5879''' – Sharp-cutoff pentode, 6.3 V/150 mA heater, Noval base*'''5881''' – AF Beam power tetrode, 6.3 V/900 mA heater, 7-pin Octal base; premium version of 6L6*'''5883''' – ATR cell*'''5884''', '''5885''' – Subminiature dual electrometer tetrodes, 1.25 V/10 mA filament, all-glass wire-ended*'''5886''' – Subminiature electrometer pentode, 1.25 V/10 mA filament, all-glass wire-ended*'''5887''', '''5888''' – Halogen-quenched γ Geiger-Müller tubes*'''5889''' – Subminiature pentode, 1.25 V/7.5 mA filament, 4+1-pin/wire-ends, for use as electrometer with 12 V anode voltage*'''5890''' – Remote-cutoff beam pentode, 6.3 V/600 mA heater, 7-pin Duodecal base, for use as high-voltage shunt regulator*'''5891''' – 25 kW, 10 MHz Forced-air cooled power triode*'''5892''' = '''EL6B''' – Xenon-filled, half-wave rectifier with a Tantalum anode*'''5893''' – ''Pencil''-type, glass/metal, medium-μ triode, 6.0 V/280 mA heater*'''5894''' – 40 W, 250&namp;bsp;MHz Dual beam power tetrode, center-tapped 12.6 V/900 mA resp. 6.3 V/1.8 A heater, Septar base*'''5895''' – 2×8 W, 186 MHz Dual RF power tetrode, 6.3 V/680 mA heater, Loctal base*'''5896''' – Subminiature separate cathodes dual diode, 6.3 V/300 mA heater, all-glass round cross-section envelope, circular 8-pin/wire-ends*'''5897''' – Ruggedized, subminiature medium-μ UHF triode, 6.3 V/150 mA heater, all-glass round cross-section envelope, circular 8-pin/wire-ends*'''5898''' – Ruggedized, subminiature high-μ triode, 6.3 V/150 mA heater, all-glass round cross-section envelope, circular 8-pin/wire-ends*'''5899''' – Subminiature, wideband, semiremote-cutoff pentode, 6.3 V/150 mA heater, all-glass round cross-section envelope, circular 8-pin/wire-ends*'''5900''' – Ruggedized, subminiature semiremote-cutoff pentode, 6.3 V/150 mA heater, all-glass round cross-section envelope, circular 8-pin/wire-ends*'''5901''' – Ruggedized, subminiature semiremote-cutoff UHF pentode, 6.3 V/150 mA heater, all-glass round cross-section envelope, circular 8-pin/wire-ends*'''5902''', '''5902-WA''' – Ruggedized, subminiature AF beam power tetrode, 6.3 V/450 mA heater, all-glass round cross-section E8-10 envelope, circular 8-pin/wire-ends*'''5902''' – Subminiature AF power pentode, 6.3 V/450 mA heater, all-glass round cross-section envelope, circular 8-pin/wire-ends; avionics version: ''5902-WA''*'''5903''' – 5896 Subminiature dual diode with a 26.5 V/75 mA heater*'''5904''' – Ruggedized, subminiature low (26.5-55 V) anode voltage medium-μ triode, 26.5 V/45 mA heater, all-glass round cross-section envelope, circular 8-pin/wire-ends*'''5905''' – Ruggedized, subminiature low (26.5-55 V) anode voltage sharp-cutoff UHF pentode, 26.5 V/45 mA heater, all-glass round cross-section envelope, circular 8-pin/wire-ends*'''5906''' – 5840 Subminiature pentode with a 26.5 V/45 mA heater*'''5907''' – Ruggedized, subminiature, low (26.5-55 V) anode voltage, remote-cutoff RF pentode, 26.5 V/45 mA heater, all-glass round cross-section envelope, circular 8-pin/wire-ends*'''5910''' – Sharp-cutoff pentode, 1.4 V/50 mA filament, Miniature 7-pin base, for use in ''Radiosonde'' weather balloon transmitters*'''5915/EH960/EH900S''', '''5915A''' – Dual-control heptode, Silicon-free 6.3 V/300 mA heater, Miniature 7-pin base, for use in high speed digital computer equipment*'''5916''' – 5636 Ruggedized, subminiature pentode with a 26.5 V/45 mA heater*'''5917''' – 5 kW, 110 MHz Water-cooled power triode*'''5920/E90CC''' – Common cathode dual triode for use as a flip-flop in computers, Silicon-free heater, Miniature 7-pin base*'''5921''', '''5922''' – ATR cells*'''5923''' = '''TBW6/6000''' – 6 kW, 75 MHz Water-cooled power triode*'''5924''', '''5924A''' – 5 kW, 75 MHz Forced-air cooled power triode*'''5927''' – TR cell*'''5929''' – 4.4-5 GHz Power Traveling-wave tube, 6.3 V/2 A heater*'''5931''' – Full-wave rectifier, 5 V/3 A heater, 5-pin Octal base*'''5932/6L6-WGA''' – Beam power tetrode, 6.3 V/900 mA heater, 7-pin Octal base*'''5933/807-W''' – Beam power tetrode, 6.3 V/900 mA heater, 5-pin Octal base*'''5934''' – Half-wave rectifier*'''5935''' – Subminiature VHF voltmeter diode, 6.3 V/150 mA heater, all-glass wire-ended*'''5936''' – 70 kW, 15 MHz Water-cooled power triode*'''5939''' – TR cell*'''5942''', '''5944''' – Halogen-quenched Neon Geiger-Müller tube, β and γ*'''5946''' – 250 W Forced air cooled, anode-pulsed UHF power triode, 6.3 V/3.4 A heater*'''5947''' – Directly heated, [[Thermionic emission|thermally-limited (=''saturated'') emission]] diode*'''5948''' = Toshiba '''4G48P''', '''5948A''' – Hydrogen triode thyratron, 6.3 V/29 A heater*'''5949''' = Toshiba '''3G49P''', '''5949A''' – Hydrogen triode thyratron, 6.3 V/18.5 A heater*'''5950''' – 700 V Corona voltage-regulator tube*'''5956''', '''5957''', '''5958''', '''5959''' – Pulse-rated Hydrogen triode thyratrons*'''5960''' – Avionics arc-discharge triode, 4-pin base*'''5961''' – Ruggedized 6SA7 heptode pentagrid converter, Octal base*'''5966''', '''6794''' – [[Hot-filament ionization gauge|Bayard–Alpert vacuum gauge]]*'''5967''', '''5968''' – Subminiature dual VHF triodes, 1.25 V/120 mA filament, all-glass round cross-section envelope, circular 8-pin/wire-ends*'''5969''' – Subminiature dual VHF tetrode, 1.25 V/200 mA filament, all-glass round cross-section envelope, circular 8-pin/wire-ends*'''5970''' – Subminiature dual VHF pentode, 1.25 V/160 mA filament, all-glass round cross-section envelope, circular 8-pin/wire-ends*'''5971''' – Ruggedized, subminiature, directly heated VHF triode, 1.25 V/80 mA filament, all-glass elliptical cross-section envelope with 5 inline wire-ends*'''5972''' – Subminiature, remote-cutoff pentode, 1.25 V/60 mA filament, all-glass elliptical cross-section envelope with 5 inline wire-ends*'''5973''', '''5973A''' – Directly heated half-wave rectifier*'''5974''' – Oil-cooled, directly heated half-wave rectifier*'''5976''' – 90 mW, 6.25-7.425 GHz Reflex Klystron, 6.3 V/440 mA heater*'''5977''' – Ruggedized, subminiature medium-μ triode, 6.3 V/150 mA heater, all-glass round cross-section envelope, circular 8-pin/wire-ends*'''5978''' – γ [[Ionization chamber]]*'''5981''' – See 5649*'''5986''' – 70 kW, 15 MHz Water-cooled power triode*'''5987''' – Ruggedized, subminiature low-μ power triode, 6.3 V/450 mA heater, all-glass round cross-section envelope, circular 8-pin/wire-ends*'''5992''' – Beam power tetrode, 6.3 V/600 mA heater, Octal base; premium version of 6V6*'''5993''' – Full-wave rectifier, 6.3 V/800 mA heater, Noval base*'''5995''' – 850 V/45 mA Subminiature half-wave rectifier, 6.3 V/300 mA heater*'''5997''' – ''Reliatron'' Image intensifier*'''5998''', '''5998A''' – 2×15 W Dual power triode, 6.3 V/2.4 A heater, Octal base, for use as series regulator in DC power supplies*'''6000''' – 100 MHz, 25 W Beam power tetrode, 26.5 V/280 mA heater, Octal base*'''6004''' – Full-wave rectifier, 5.0 V/2.0 A heater, 5-pin Octal base*'''6005''' – AF Beam power tetrode, 6.3 V/450 mA heater, Miniature 7-pin base*'''6006''' – Ruggedized 6SG7 semiremote-cutoff pentode*'''6007''' – Subminiature power pentode, 1.25 V/13.3 mA filament, all-glass round cross-section envelope, inline 5-pin/wire-ends*'''6008/DF67''' – Subminiature AF pentode, 0.625 V/13.3 mA filament, all-glass round cross-section envelope, inline 5-pin/wire-ends base, for use in hearing aids*'''6011''' = '''710''' – 1.5 kV, 2.5 A Gas/Mercury-vapor thyratron*'''6012''' – Xenon tetrode thyratron, negative control characteristic, 6.3 V/2.6 A heater, 6-pin Octal base*'''6013''' = '''EL3B''', '''6015''' = '''EL6F''' – Xenon-filled, half-wave rectifiers with a Tantalum anode*'''6014''' = EEV '''C1K''' = '''ELC1K''' – Xenon-filled triode thyratron, negative control characteristic, 2.5 V/6.3 A heater, 4-pin base*'''6017''' – 1 kW, 400 MHz Forced-air cooled, ceramic/metal VHF power triode for use in grounded-grid amplifiers*'''6018''' – ''Rocket''-type UHF Pulse power triode, 6.3 V/400 mA heater*'''6019''' – 2 kW, 900 MHz Water jacket-cooled, ceramic/metal UHF power tetrode for use in grounded-grid amplifiers*'''6021/ECC70''', '''6021-WA''' – Ruggedized, subminiature dual medium-μ triode, 6.3 V/300 mA heater, all-glass round cross-section envelope, circular 8-pin/wire-ends*'''6021''', '''6021-WA''', '''6112''', '''6690''', '''6832''' – Ruggedized, subminiature dual medium-μ UHF triode, 6.3 V/300 mA heater, all-glass round cross-section envelope, circular 8-pin/wire-ends*'''6024''', '''6033''', '''6034''' – ATR cells*'''6026''' – Subminiature RF triode, 5.2-6.6 V/200 mA heater, all-glass round cross-section envelope, circular 5-pin/wire-ends, for use as Radiosonde Service*'''6027''' – Magnetron*'''6028''' – UHF Pentode, 20 V/50 mA heater, Miniature 7-pin base*'''6029''' – Subminiature triode, 1.25 V/200 mA filament, all-glass elliptical cross-section envelope with 4 inline wire-ends*'''6032''', '''6032A''' – Image converter*'''6035''' – TR cells*'''6038''' – TR cell*'''6039''' – 7 kW, 220 MHz Water-cooled, ceramic/metal VHF power triode for use in grounded-grid amplifiers; 9C24 with 74.2% less heater power*'''6040''' (9.308 GHz), '''6041''' (9.312 GHz) – Reference microwave cavities*'''6043''' = Raytheon '''QK159''' – 2.95-3.275 GHz Reflex Klystron, Octal base*'''6044''' – Gas-filled triode thyratron, negative control characteristic*'''6045''' – Dual triode, 6.3 V/350 mA heater, Miniature 7-pin base*'''6046''' – Beam power tetrode, 25L6-GT with a Silicon-free heater and a low-secondary emission control grid*'''6049''' – Ruggedized, subminiature remote-cutoff UHF pentode, 6.3 V/150 mA heater, all-glass round cross-section envelope, circular 8-pin/wire-ends base*'''6050''' – Subminiature, directly heated triode , 1.25 V/120 mA filament, all-glass elliptical cross-section envelope with 4 inline wire-ends*'''6051''' – Subminiature power pentode, 1.25 V/100 mA filament, all-glass elliptical cross-section envelope with 5 inline wire-ends*'''6052''' (6.3 V/300 mA heater), '''6053''' (26.5 V/75 mA heater) – Ruggedized, subminiature dual UHF diode, all-glass round cross-section envelope, circular 8-pin/wire-ends*'''6055''' – Ruggedized, subminiature, low (26.5-55 V) anode voltage, medium-μ UHF triode, 26.5 V/45 mA heater, all-glass round cross-section envelope, circular 8-pin/wire-ends*'''6056''' – Ruggedized, subminiature, low (26.5-55 V) anode voltage, remote-cutoff UHF pentode, 26.5 V/45 mA heater, all-glass round cross-section envelope, circular 8-pin/wire-ends*'''6057/ECC803S''' – Dual triode, Noval base*'''6058''' – Ruggedized 6AL5 dual diode, Miniature 7-pin base*'''6061''' – Ruggedized 6V6G/GT beam power tetrode*'''6062''' – 12 W, 175 MHz VHF beam power tetrode, Noval base*'''6063/E90Z''' – Ruggedized full-wave rectifier*'''6065''' – Ruggedized remote-cutoff RF pentode, Miniature 7-pin base*'''6066''' – Ruggedized 6AT6 dual diode + triode, Miniature 7-pin base*'''6072''' – Dual medium-μ triode, center-tapped 12.6 V/175 mA resp. 6.3 V/350 mA heater, Noval base; premium version of 12AY7*'''6073/0A2-WA''' – 150 V Voltage-regulator tube, Miniature 7-pin base*'''6074''' – 108 V Voltage-regulator tube, Miniature 7-pin base; premium version of 0B2*'''6075''' (Water-cooled), '''6076''' (forced-air cooled) – 3 kW, 220 MHz power tetrodes*'''6077''' (Water-cooled, 50 kW), '''6078''' (forced-air cooled, 45 kW) – 15 MHz power triodes*'''6080''' (''6080-WA'', ''6080-WB'', ''6080S'') – Dual low-μ power triode, 6.3 V/2.5 A heater, Octal base*'''6081''' – ATR cell*'''6082''', '''6082A''' – 13 W Ruggedized dual power triode, 26.5 V/600 mA heater, Octal base*'''6083''' – 45 W, 60 MHz Radiation-cooled power pentode*'''6084/E80F''' – Ruggedized AF pentode, Noval base*'''6085/E80CC''' – Ruggedized dual AF triode, Noval base*'''6086''' = Philips '''18042''' – Pentode for use in telephone equipment, 18 V/100 mA heater, Noval base*'''6087''' – Indirectly heated full-wave rectifier , 5.0 V/2.0 A heater, 5-pin Octal base; premium version of 5Y3-GT*'''6088''' – 10.5 mW Subminiature power pentode, 1.25 V/20 mA filament, all-glass elliptical cross-section envelope with 5 inline wire-ends*'''6089''' – 9.28 GHz Reference microwave cavity*'''6092''' – Subminiature power pentode, 1.25 V/50 mA filament, all-glass elliptical cross-section envelope with 5 inline wire-ends*'''6094''' – 12,5 W Ruggedized beam power tetrode, 6.3 V/600 mA heater, Noval base*'''6095''' – Renamed to 6AQ5*'''6096''' – See 5654*'''6097''' – See 5726*'''6098/6AR6-WA''', '''6384''' – 21 W Ruggedized beam power tetrode, 6.3 V/1.2 A heater, 6-pin Octal base; premium version of 6AR6*'''6100/6C4-WA''' – Ruggedized medium-μ triode, 6.3 V/150 mA heater, Miniature 7-pin base*'''6101''' – Ruggedized dual medium-μ triode, 6.3 V/450 mA heater, Miniature 7-pin base*'''6102''' – 40 kV, 150 mA Oil-cooled half-wave rectifier, 5 V/7.2 A heater*'''6103''' – 20 kV, 150 mA Forced-air cooled half-wave rectifier, 5 V/7.2 A heater*'''6106''' – Full-wave rectifier, 5.0 V/1.7 A heater, 5-pin Octal base; premium version of 5Y3-GT*'''6110''' – Ruggedized, subminiature, separate cathodes dual diode, 6.3 V/150 mA heater, all-glass round cross-section envelope, circular 8-pin/wire-ends*'''6111''' (Medium-μ), '''6112''' (high-μ), '''6113''' – Subminiature, separate cathodes dual UHF triode, 6.3 V/300 mA heater, all-glass round cross-section envelope, circular 8-pin/wire-ends base; ruggedized versions: ''6111-WA'', ''6112-WA''*'''6115''', '''6584''' (Reduced repeller voltage variation with frequency) – 5.1-5.9 GHz Reflex Klystron, 6.3 V heater, Octal base*'''6116''' = Bendix '''TK62''' – 30 mW, 8.5 to 9.66 GHz Reflex Klystron, 6.3 V/465-880 mA heater, Octal base; 2K45 with diode thermal tuning*'''6117''' – TR cell*'''6118''' – Ruggedized 6Q7 dual diode + triode*'''6119''' – 2 kV Corona voltage-regulator tube*'''6121''' – 10h lifespan, subminiature, directly heated VHF triode, 1.25 V/120 mA filament, all-glass elliptical cross-section envelope with 4 inline wire-ends*'''6130/3C45''' – Hydrogen triode thyratron, positive control characteristic, 6.3 V/2.3 A heater, 4-pin base*'''6132''' – Ruggedized power pentode for use as CRT cathode driver*'''6133''' – 1.2-3.75 GHz Reflex Klystron*'''6134''' – Sharp-cutoff pentode, 6.3 V/450 mA heater, Octal base; premium version of 6AC7*'''6135''' – Medium-μ VHF triode, 6.3 V/175 mA heater, Miniature 7-pin base*'''6136''' – Sharp-cutoff pentode, 6.3 V/300 mA heater, Miniature 7-pin base; premium version of 6AU6*'''6137''' – Remote-cutoff RF/IF pentode, 6.3 V/300 mA heater, Octal base*'''6140''' – 100 V Voltage-regulator tube,*'''6141''' = '''427A''' – 100 V Voltage-regulator tube,*'''6142''' – 150 V Voltage-regulator tube, with 2 axial leads like a resistor*'''6143''' – 1.2 kV Corona voltage-regulator tube*'''6144''' – Directly heated, [[Thermionic emission|thermally-limited (=''saturated'') emission]] coaxial UHF noise diode, 3.2 V/2.5 A heater*'''6145''' – Sharp-cutoff pentode, 6.3 V/600 mA heater, Loctal base, for use in computer equipment*'''6146''', '''6146A''', '''6146B/8298A''' (''6146-W/7212'') – RF/AF Beam power tetrode, 6.3 V/1.125 A heater, Octal base*'''6147''' – Ruggedized, subminiature 1.5 W, 400 MHz power pentode, center-tapped 2.5 V/62.5 mA resp. 1.25 V/125 mA filament, all-glass round cross-section envelope, circular 8-pin/wire-ends*'''6152''' – Ruggedized, subminiature low-μ UHF triode, 6.3 V/200 mA heater, all-glass round cross-section envelope, 5-pin/wire-ends*'''6155/4-125A''' – Beam power tetrode, 5.0 V/6.5 A heater, 5-pin base*'''6156/4-250A''' – Beam power tetrode, 5.0 V/14.1 A heater, 5-pin base*'''6157''' – Half-wave rectifier, Noval base*'''6158''' – Dual medium-μ triode, center-tapped 12.6 V/300 mA resp. 6.3 V/600 mA heater, Noval base*'''6159''', '''6159A''', '''6159B''' (''6159-W/7357'') – RF/AF Beam power tetrode ;similar to 6146-W/7212, 26.5 V/300 mA heater, Octal base*'''6161''' – Forced-air cooled power triode, 6.3 V/3.4 A heater*'''6162''', '''6163''', '''6164''' – ATR cells*'''6166''' (5 V/181 A heater), '''6166A/7007''' (5 V/168 A heater) – Forced-air cooled beam power tetrode*'''6169''' – Ruggedized, subminiature UHF triode, 6.3 V/150 mA heater, all-glass round cross-section envelope, circular 8-pin/wire-ends*'''6174''' – Gas-filled half-wave rectifier, Miniature 7-pin base*'''6177''' – Magnetron*'''6180''' – See 6042*'''6181''' – Forced-air cooled UHF power tetrode, 120 V/1.55 A heater*'''6183''' – 500 W, 900 MHz Forced-air cooled, ceramic/metal VHF power tetrode for use in grounded-grid amplifiers*'''6184''' – Subminiature dual UHF diode, 6.3 V/150 mA heater, all-glass round cross-section envelope, circular 8-pin/wire-ends*'''6186''' – Sharp-cutoff pentode, Miniature 7-pin base*'''6187''' – Sharp-cutoff RF pentode, 6.3 V/175 mA heater, Miniature 7-pin base*'''6188/6SU7-WGT''' – Dual high-μ triode, 6.3 V/300 mA heater, Octal base*'''6189/E82CC/ECC802S''', '''6189A''' – Dual medium-μ triode, center-tapped 12.6 V/150 mA resp. 6.3 V/300 mA heater, Noval base*'''6193''' – Ruggedized, subminiature variant of the 7F8 dual triode with reduced dissipation limits, all-glass round cross-section envelope, circular 8-pin/wire-ends*'''6195''' – Ruggedized, subminiature VHF beam power tetrode, center-tapped 2.5 V/110 mA resp. 1.25 V/220 mA filament, all-glass round cross-section envelope, circular 8-pin/wire-ends*'''6197''' – Power pentode, Silicon-free 6.3 V/650 mA heater, Noval base, for use in computer equipment*'''6198''' – 0.62" Vidicon, 6.3 V/600 mA heater*'''6199''' – 10-stage S11 Photomultiplier*'''6201/E81CC/ECC801S''' – Dual high-μ triode, center-tapped 12.6 V/150 mA resp. 6.3 V/300 mA heater, Noval base; premium version of 12AT7*'''6202''' – Dual diode, 6.3 V/600 mA heater, Miniature 7-pin base; premium version of 6X4*'''6203''' – Dual diode, 6.3 V/900 mA heater, Noval base*'''6205''' – 5840 Subminiature pentode with the suppressor grid on a separate lead*'''6207''' (X-rays), '''6208''' (α and β), '''6209''' = '''240N''' (α, β, γ), '''6210''' = '''240C''' (X-rays) – Halogen-quenched Geiger-Müller tubes*'''6211''' – Dual medium-μ triode, Silicon-free, center-tapped 12.6 V/150 mA resp. 6.3 V/300 mA heater, Noval base, for use in computer equipment*'''6214''' – ATR cell*'''6215''' – 18 kV Half-wave rectifier, Octal base*'''6216''' – 10 W Ruggedized beam power pentode, Noval base*'''6217''' – 10-Stage S10 photomultiplier, Diheptal 14-pin base*'''6221''' – Ruggedized, subminiature medium-μ triode, 6.3 V/175 mA heater, all-glass round cross-section envelope, circular 8-pin/wire-ends*'''6223''' – Ruggedized, subminiature sharp-cutoff pentode, 6.3 V/175 mA heater, all-glass round cross-section envelope, circular 8-pin/wire-ends*'''6224''' – Ruggedized, subminiature beam power tetrode, 6.3 V/450 mA heater, all-glass round cross-section envelope, circular 8-pin/wire-ends*'''6225''' – Ruggedized, subminiature semiremote-cutoff pentode, 6.3 V/175 mA heater, all-glass round cross-section envelope, circular 8-pin/wire-ends*'''6227/E80L''' – 2.8 W Ruggedized AF power pentode, Noval base with Gold-plated pins, long-life >10000h*'''6228''' – Ignitron*'''6231''' – Gas-filled triode thyratron*'''6232''' – TR cell*'''6233''' – UHF Magnetron*'''6236''' – 125 mW, 3.8-7.6 GHz Reflex Klystron*'''6237''' (470-530 MHz), '''6238''' (530-590 MHz), '''6239''' (590-656 MHz), '''6240''' (656-728 MHz), '''6241''' (727-806 MHz), '''6242''' (806-890 MHz) – 12 kW Water-cooled UHF 3-cavity Klystrons for use in TV transmitters*'''6245''' – Ruggedized, subminiature sharp-cutoff UHF pentode, 6.3 V/200 mA heater, all-glass round cross-section envelope, 7-pin/wire-ends*'''6246''' – Water-cooled RF triode*'''6249A''' – Magnetron*'''6250''' – Electrometer tetrode, 2.5 V/45 mA filament, Noval base*'''6251''' – 25 kW Water-cooled tetrode, 5.5 V/190 A heater*'''6252''' – Dual RF power tetrode*'''6263''', '''6263A''' – ''Pencil''-type UHF medium-μ triode, 6.0 V/280 mA heater*'''6264''', '''6264A''' – ''Pencil''-type UHF medium-μ triode, 6.0 V/280 mA heater*'''6256''' (Water-cooled, 5 kW), '''6257''' (Water jacket-cooled, 5 kW), '''6258''' (Forced-air cooled, 3 kW) – 40 MHz coaxial power triodes*'''6259''' – 83-87 V Voltage-regulator tube,*'''6260''' – TR cell*'''6267/EF806S''' – Ruggedized AF pentode, Noval base*'''6268''' – Hydrogen triode thyratron*'''6270''' (9.5-9.6 GHz), '''6271''' (9.345-9.405 GHz), '''6272''' (9.406-9.5 GHz), '''6273''' (9.1-9.2 GHz), '''6274''' (9-9.1 GHz), '''6275''' (9.2-9.344 GHz) – 14 W Magnetrons*'''6276''' – ATR cell*'''6278''', '''6279''' – Xenon-filled triode thyratrons*'''6280''' = '''416B''' – 7.5 W, 4 GHz Planar SHF power triode*'''6281''' – Subminiature directly heated, low-microphonics AF pentode, 0.625 V/20 mA heater, all-glass elliptical cross-section envelope with 5 inline wire-ends*'''6282''' – TR cell*'''6283''' – 500 W, 400 MHz Forced-air cooled, ceramic/metal RF tetrode*'''6285''' – L-band pulsed Magnetron*'''6286''' – Subminiature directly heated triode, 1.25 V/125 mA filament, all-glass elliptical cross-section envelope with 4 inline wire-ends*'''6287''' – Ruggedized AF beam power tetrode, 6.3 V/500 mA hester, Noval base*'''6291''', '''6292''' – 10-Stage S9 photomultipliers, Diheptal 14-pin base*'''6293''' – Pulse modulator beam power tetrode, 6.3 V/1.25 A heater, Octal base*'''6299''' – 3 GHz Ceramic/metal disk-seal planar UHF triode, 6.3 V/300 mA heater*'''6303''' – 40 kV/2.5 A [[Clipper (electronics)|Clipper]] diode, 11.5 V/15.25 A heater*'''6304''' – ATR cell*'''6305''' = STC '''2T/270K''' – 12.5 kV Half-wave rectifier, Miniature 7-pin base*'''6307''' – <sup>10</sup>[[Boron trifluoride]]-filled, [[Neutron temperature#Thermal neutrons|thermal neutrons]] [[Neutron detection#BF3 gas-filled proportional detectors|proportional detector]]*'''6310''', '''6311''', '''6312''', '''6313''', '''6314''', '''6315''', '''6316''' – 8.5-10 GHz Reflex Klystrons*'''6320''' (High-μ), '''6321''' (low-μ) – Subminiature variants of 6SL7 and 6SN7 dual triodes, all-glass round cross-section envelope, circular 8-pin/wire-ends*'''6322''' – TR cell*'''6323''' (JETEC B11-88 ''Submagnal'' 11-pin base), '''6328''' (JETEC B11-104 ''Neosubmagnal'' 11-pin base) – 9-stage S4 side-on photomultipliers for use in automotive headlight [[Headlamp#Automatic beam switching|''Automatic Beam Control'' systems]]*'''6325''' – Full-wave rectifier*'''6326''', '''6326A''' – 0.62" Vidicon, 6.3 V/600 mA heater, ''Ditetrar'' 8-pin E8-11 base*'''6327''' – 35 W Beam power tetrode, 6.3 V/800 mA heater, 6.3 V/800 mA heater, ''Micanol'' Octal base with anode on top cap*'''6330''', '''6331''' (For immersion in oil) – Vacuum SPDT relays operated by an external solenoid like a [[reed switch]]*'''6332''' – Subminiature 63 V voltage-regulator tube*'''6333''' – Water-cooled AF/RF power triode*'''6334''' – TR cell*'''6336''', '''6336A''', '''6336B''' – 2×30 W Dual power triode, 6.3 V/4.75 A heater, Octal base, for use as series regulator in DC power supplies*'''6339''' – 16 k V/8 A [[Clipper (electronics)|Clipper]] diode, 6.3 V/1.55 A heater*'''6342A''' – 10-Stage S11 photomultiplier, Diheptal 14-pin base*'''6343''' – [[Pressure measurement#Thermal conductivity|Thermocouple vacuum gauge]]*'''6344''' = Raytheon '''QK235''' – 175 kW<sub>peak</sub>, 5.45-5.825 GHz Pulsed Magnetron*'''6345''' – 4.5...11.2V, 140...160 mA [[Electrical ballast#Self-variable resistors|ballast tube]]*'''6347''' – Ignitron*'''6350''' – Dual medium-μ triode, Silicon-free, center-tapped 12.6 V/300 mA resp. 6.3 V/600 mA heater, Noval base, for use in computer equipment*'''6352''' – Subminiature, directly heated, dual [[Thermionic emission|thermally-limited (=''saturated'') emission]] vacuum diode, 3 V/360 mA filament*'''6354''' – 150 V Voltage-regulator tube, Miniature 7-pin base*'''6355''' – Ruggedized dual-sensitivity top-view tuning indicator without amplifier triodes, Miniature 7-pin base; similar to 6AF6-G*'''6356''' – Gas-filled noise diode, 12 VDC/170 mA heater*'''6357''' – Gas-filled noise diode, 12 VDC/170 mA heater*'''6358''' – Gas-filled noise diode, 10 VDC/300 mA heater*'''6359''' – Gas-filled noise diode, 12 VDC/170 mA heater*'''6360''' – Dual RF power tetrode, center-tapped 12.6 V/410 mA resp. 6.3 V/820 mA heater, Noval base*'''6362''' (10-Stage), '''6365''' (6-stage) – S11 photomultiplier*'''6363''', '''6364''' – 10-Stage S4 photomultiplier, Diheptal 14-pin base*'''6366''' (11 V/29 A heater), '''6367''' (13 V/36 A heater) – 3 kW, 30 MHz Forced-air cooled power triodes*'''6370/E1T''' – Decade counter tube*'''6372''' – 10-Stage S11 photomultiplier*'''6373''' – Subminiature RF power pentode, 1.25 V/110 mA filament, all-glass round cross-section envelope, circular 8-pin/wire-ends base*'''6374''' – High-altitude avionics, half-wave rectifier, Noval base*'''6375''' – Subminiature RF power triode, 1.25 V/200 mA filament, all-glass round cross-section envelope, circular 8-pin/wire-ends base*'''6376''', '''6376A''' – Fission fragment counting, Nitrogen/Argon-filled [[ionization chamber]] with [[Enriched uranium|enriched <sup>235</sup>Uranium]] [[Uranium oxide|oxide]]-coated Aluminium electrodes for [[Neutron temperature#Thermal neutrons|thermal neutron]] detection*'''6377''' – [[Boron]]-lined, Nitrogen-filled, thermal neutron-counting ionization chamber*'''6378''' – TR cell*'''6381''' – IR Image converter*'''6383''' – 600 W, 2 GHz Water or [[DEG monobutyl ether|butyl carbitol]] or [[Ethylene glycol#Coolant and heat-transfer agent|ethylene glycol]] or [[hydraulic fluid]]-cooled power triode*'''6384''' – See 6098*'''6385''' – Dual triode, 6.3 V/500 mA heater, Noval base; similar to 2C51 or 5670*'''6388''' = WE '''443A''' – Gas-filled cold-cathode trigger triode, one starter electrode, <5 µCi of <sup>85</sup>Kr keep-alive, Noval base*'''6389''' – 8.69-9.41 GHz Reflex Klystron, 6.3 V/950 mA heater*'''6390''' – 6.7-11.05 GHz Reflex Klystron*'''6391''' – Subminiature low-[[microphonics]] pentode, 6.3amp; V/200 mA heater, 8-pin all-glass wire-ended*'''6393''', '''6396''' – ATR cells*'''6394''', '''6394A''' – 2×30 W Dual power triode, 26.5 V/1.2 A heater, Octal base, for use as series regulator in DC power supplies*'''6405''' = RCA '''1640''' – Gas-filled, low-microphonics S1 phototube, UX4 base*'''6406''' = Raytheon '''QK428''', '''6410''' = Raytheon '''QK338''' – Pulsed Magnetrons*'''6411''' – Image converter*'''6414''' – Dual medium-μ triode, Silicon-free, center-tapped 12.6 V resp. 6.3 V heater, Noval base*'''6416''' – Thermocouple vacuum gauge*'''6417''' – VHF Beam power tetrode, 12.6 V/375 mA heater, Noval base*'''6418''' – Subminiature, directly heated pentode, 1.25 V/10 mA filament, all-glass elliptical cross-section envelope with 5 inline wire-ends*'''6419''' – Subminiature pentode, 0.625 V/10 mA heater, all-glass elliptical cross-section envelope with 5 inline wire-ends*'''6420''' (Water-cooled, 12.5 kW), '''6421''' (Aluminium disc-fin forced-air cooled, 10 kW), '''6421F''' (Copper fin forced-air cooled, 7.5 kW) – 30 MHz Power triodes*'''6422''' (Water-cooled, 20 kW), '''6423''' (disc-fin forced-air cooled), '''6423F''' (forced-air cooled) – 30 MHz Power triode*'''6424''' (Water-cooled, 20 kW), '''6425''' (disc-fin forced-air cooled), '''6425F''' (forced-air cooled) – 30 MHz Power triode*'''6426''' (Water-cooled, 40 kW), '''6427''' (disc-fin forced-air cooled, 20 kW) – 30 MHz Power triode*'''6435''' – 5.42 GHz Reference microwave cavity*'''6436''' = Raytheon '''CK1036''' – Subminiature, gas-filled, cold-cathode half-wave rectifier, all-glass round cross-section envelope, 2-pin/wire-ends*'''6437''' = '''CK1037''' – Subminiature 700 V corona voltage-regulator tube, all-glass round cross-section envelope, 3-pin/wire-ends*'''6438''' = '''CK1039''' – Subminiature 1.2 kV corona voltage-regulator tube, all-glass round cross-section envelope, 3-pin/wire-ends*'''6440''' – [[Pirani gauge]]*'''6442''' – 5 GHz Ceramic/metal disk-seal planar UHF triode, 6.3 V/900 mA heater*'''6443''' – High-altitude avionics, half-wave rectifier, Noval base*'''6445''' – Upgraded drop-in replacement for the 892R power triode*'''6446''' – Ruggedized 892 power triode*'''6447''' – Ruggedized 892R power triode*'''6448''' – 26 kW, 1 GHz Water+forced-air cooled linear UHF beam power tetrode, center-tapped 2.7 V/1 kA resp. 1.35 V/2 kA resp. 2-phase (1[[Imaginary unit|+{{mvar|j}}]])×1.35 V/1 kA filament*'''6455''' – ATR cell*'''6463''' – Dual triode, Silicon-free, center-tapped 12.6 V/300 mA resp. 6.3 V/600 mA heater, Noval base, for use in computer equipment*'''6465''' (5.95-6.4 GHz), '''6466''' (6.8-7.175 GHz) – 6-9 W 2-cavity Klystrons, 6.3 V/2.0 A heater, Octal base and UG344/U waveguide output*'''6467''' – 10-Stage S4 photomultiplier, Duodecal base*'''6468''' (6.125-6.425 GHz), '''6469''' (6.575-6.875 GHz), '''6470''' (7.125-7.425 GHz) – Reflex Klystrons*'''6472''' – 9-Stage S4 photomultiplier*'''6474''' = RCA '''1854''' – Image Orthicon, Diheptal 14-pin base*'''6476''', '''6476A''' – 4 kHz Bidirectional Dekatron with 10 output cathodes, modified Duodecal base*'''6478''' – Gas filled thyratron*'''6481''' – See 5767*'''6482''' – Bidirectional Dekatron with 1 output cathode, Octal base*'''6483''' – Gas filled, cold cathode trigger tube (small thyratron)*'''6485''' – Sharp-cutoff pentode, 6.3 V/450 mA heater, Miniature 7-pin base*'''6486''' – Sharp-cutoff, dual-control RF pentode, Noval base*'''6487''' – Subminiature dual-control RF pentode with an integral diode internally connected to the ''short-base'' suppressor grid, 6.3 V/200 mA heater, all-glass round cross-section envelope with 8 long inline wire-ends*'''6488''' – Subminiature RF pentode, 6.3 V/200 mA heater, all-glass round cross-section envelope with 8 long inline wire-ends*'''6489''' – Subminiature diode, 6.3 V/150 mA heater, all-glass round cross-section envelope with 5 long inline wire-ends*'''6493''' – 1.9-4.1 GHz Signal Traveling-wave tube, 6.3 V/1.0 A or 640-960 mA heater (conflicting datasheets), Octal base and [[BNC connector]]s*'''6496''' – 2-4 GHz Backward-wave oscillator, 6.3 V/3.5 A heater*'''6503''' – Ruggedized 3 GHz power triode for use as oscillator with an external cavity*'''6504''', '''6509''', '''6511''', '''6512''', '''6513''', '''6514''', '''6515''' – Ignitrons*'''6508''' – 21 kV Mercury-vapor half-wave rectifier*'''6516''' – Ruggedized AF/RF power pentode, 6.3 V/200 mA heater, 7-pin Miniature base; similar to 6AM5*'''6517''' = Raytheon '''QK358''' – Magnetron*'''6518''' = Raytheon '''QK254''' – Pulsed Magnetron*'''6519''' – Subminiature, directly heated pentode , 1.25 V/10 mA filament, all-glass elliptical cross-section envelope with 5 inline wire-ends*'''6520''' – 2×14 W Dual power triode, 6.3 V/2.5 A heater, Octal base, for use as series regulator in DC power supplies*'''6521''' – Magnetron, 10 V/3.2 A heater*'''6524''' – Dual beam power tetrode, 6.3 V/1.25 A heater, Septar base*'''6526''' – Subminiature, directly heated power pentode, 1.25 V/125 mA filament, all-glass elliptical cross-section envelope with 5 inline wire-ends*'''6527''' – Magnetron*'''6528''', '''6528A''' – 2×30 W Dual power triode, 6.3 V/5 A heater, Octal base, for use as series regulator in DC power supplies*'''6528''' – Dual power triode, 6.3 V/5 A heater, Octal base, for use as series regulator in DC power supplies*'''6532''' – Half-wave rectifier*'''6535''', '''6536''' – Thermocouple vacuum gauges*'''6538''' – Cold-cathode gas triode with a keep-alive (primer) cathode, Noval base*'''6539''' – Cold-cathode gas triode with a keep-alive (primer) cathode, Noval base, for use with Geiger-Müller tubes*'''6540''' – Subminiature, sharp-cutoff pentode, 6.3 V/200 mA heater, all-glass round cross-section envelope, inline 7-pin/wire-ends*'''6541''' – 23.25-24.75 GHz Reflex Klystron*'''6542''' – Subminiature 150 V voltage-regulator tube, all-glass round cross-section envelope, 3-pin/wire-ends*'''6543''', '''6543A''' – Pulsed Magnetron*'''6544''' – 1 kW Forced-air cooled power triode for use in ''hard-tube pulser'' modulators*'''6545''' – TR cell*'''6546''' – ATR cell*'''6549''' – 75 W, 175 MHz Radiation-cooled beam power pentode*'''6550''', '''6550A''' – AF beam power tetrode*'''6551''' – Magnetron, 5 V/2.6-3.2 A heater*'''6559''' – 2-4 GHz Power Traveling-wave tube, 8.0 V/800 mA or 6.3 V/1.1-1.5 A heater (conflicting datasheets)*'''6560''', '''6564''', '''6565''', '''6568''' – TR cells*'''6562''' – See 5794A*'''6567''' – 15 kW, 50 MHz Water-cooled power triode*'''6570''' – S1 Phototube*'''6573''' = Raytheon '''QK483''' – 15.5-17 GHz Reflex Klystron*'''6576''' – 22.5 kW, 25 MHz Water-cooled linear power triode for use as SSB amplifier*'''6578''' – Bayard–Alpert vacuum gauge*'''6579''' – Pirani gauge*'''6580''' – 400 W Power triode for use in grounded-grid amplifiers*'''6582''', '''6582A''' – Sharp-cutoff, dual-control RF pentode, Noval base*'''6584''' – See 6115*'''6587''' – Hydrogen triode thyratron*'''6588''', '''6591''', '''6592''', '''6593''', '''6594''', '''6595''', '''6596''', '''6598''', '''6599''', '''6600''', '''6601''', '''6602''', '''6604''', '''6605''', '''6615''', '''6616''', '''6619''', '''6620''', '''6621''', '''6624''', '''6629''', '''6630''', '''6631''', '''6632''', '''6633''', '''6635''', '''6636''', '''6637''', '''6639''', '''6640''', '''6641''', '''6642''', '''6644''', '''6645''', '''6646''', '''6647''', '''6648''', '''6649''', '''6650''' – TR/ATR cells*'''6611''' – Subminiature, directly heated RF pentode , 1.25 V/20 mA filament, all-glass elliptical cross-section envelope with 5 inline wire-ends*'''6612''' – Subminiature, directly heated RF pentode , 1.25 V/80 mA filament, all-glass elliptical cross-section envelope with 5 inline wire-ends*'''6617''' = '''TBW12/25''' (Water-cooled), '''6618''' = '''TBL12/25''' (forced-air cooled) – 30 MHz Power triodes*'''6623''' – 2.5 kW, 60 MHz Forced-air cooled power triode*'''6625''' – 22 kW<sub>peak</sub>, 300 W<sub>avg</sub>, 960-1215 MHz Forced-air cooled, pulse-rated 3-cavity Klystron, 5 V/40 A heater*'''6626''' (148 V), '''6627''' (108 V) – Voltage-regulator tubes, Miniature 7-pin base*'''6655A''' – 10-Stage S11 photomultiplier*'''6656''' (S1 Caesium-on-oxidated-Silver photocathode), '''6658''' (S11 Caesium-activated antimony) – Video camera tubes*'''6659''' = Raytheon '''CK1042''' – Subminiature, gas-filled half-wave rectifier, all-glass round cross-section envelope, 2-pin/wire-ends*'''6660/6BA6''' – Remote-cutoff pentode, 6.3 V/300 mA heater, Miniature 7-pin base*'''6661/6BH6''' – Sharp-cutoff pentode, 6.3 V/150 mA heater, Miniature 7-pin base*'''6662/6BJ6''' – Remote-cutoff pentode, 6.3 V/150 mA heater, Miniature 7-pin base*'''6663/6AL5''' – Dual diode, 6.3 V/300 mA heater, Miniature 7-pin base*'''6664/6AB4''' – High-μ triode, 6.3 V/150 mA heater, Miniature 7-pin base*'''6669/6AQ5A''' – Beam power tetrode, 6.3 V/450 mA heater, Miniature 7-pin base*'''6676/6CB6A''' – Sharp-cutoff pentode, 6.3 V/300 mA heater, Miniature 7-pin base*'''6677/6CL6''' – Power pentode, 6.3 V/650 mA heater, Noval base*'''6678/6U8A''' – Medium-μ triode + sharp-cutoff pentode, 6.3 V/450 mA heater, Noval base*'''6679/12AT7''' – Dual high-μ triode, center-tapped 12.6 V/150 mA resp. 6.3 V/300 mA heater, Noval base*'''6680/12AU7A''' – Dual medium-μ triode, center-tapped 12.6 V/150 mA resp. 6.3 V/300 mA heater, Noval base*'''6681/12AX7''' – Dual high-μ triode, center-tapped 12.6 V/150 mA resp. 6.3 V/300 mA heater, Noval base*'''6684''' – Gas-filled Noise diode, 12 VDC/170 mA heater*'''6685''' – Dual TR cell*'''6686/E81L''' – Power pentode for use in telephone equipment, 6.3 V/375 mA heater, Noval base*'''6687''' – Dual-control switching heptode, designed for high speed digital computers, Miniature 7-pin base*'''6688/E180F''', '''6688A''' – Ruggedized pentode, 6.3 V/300 mA heater, Noval base*'''6689/E83F''' – Pentode for use in telephone equipment, 6.3 V/300 mA heater, Noval base*'''6690''' – Ruggedized, subminiature dual medium-μ triode, 6.3 V/300 mA heater, all-glass round cross-section envelope, circular 8-pin/wire-ends*'''6693''' – Mercury-vapor, half-wave rectifier*'''6696''', '''6696A''' (Water-cooled, 60 kW), '''6697''', '''6697A''' (forced-air cooled, 35 kW), '''7480''', '''7480A''' (Water/vapor-cooled, 80 kW) – 30 MHz Power triode*'''6698''' – 2-4 GHz Traveling-wave tube with [[TNC connector]]s*'''6699''' – 1-2 GHz Backward-wave oscillator, 6.3 V/2.2-3.9 A heater*'''6752''' – 1-2 GHz Backward-wave oscillator, 6.3 V/1.1-1.5 A heater*'''6753''' – 1-2 GHz Traveling-wave tube with [[N connector]]s*'''6754''' – Full-wave rectifier, 6.3 V/1.0 A heater, Noval base*'''6756''' – 20 kW Water-cooled RF power triode*'''6757''' – 15 kW Forced-air cooled RF power triode*'''6758''' – 6 kW, 30 MHz Water-cooled RF power triode*'''6759''' – 6 kW, 30 MHz Forced-air cooled RF power triode*'''6760''' (18 V/350 mA heater), '''6761''' (6.3 V/1 A heater) – Power pentode, Noval base*'''6763''' – Gas-filled half-wave rectifier, Miniature 7-pin base*'''6775''' = Eimac '''4-400C''' – 110 MHz, 400 W Glass radial-beam power tetrode*'''6771''' – 4 GHz Ceramic/metal disk-seal planar high-μ triode, 4.5-6.3 V/575 mA heater*'''6777''' – Hydrogen triode thyratron*'''6778''' – Subminiature triode, 6.3 V/150 mA heater, all-glass round cross-section envelope, circular 8-pin/wire-ends base*'''6779''' – Gas filled, cold cathode trigger tube (small thyratron)*'''6780''', '''6781''' – 8.5-10 GHz Reflex Klystrons*'''6782''', '''6783''' – Argon-filled noise diodes, 12 V/170 mA heater*'''6784''' – 3.1-3.5 GHz Signal Traveling-wave tube, 6.3 V/370 mA heater*'''6786''' – Mercury-vapor thyratron*'''6787''' – Magnetron*'''6788''' – Ruggedized, subminiature sharp-cutoff AF pentode, 6.3 V/175 mA heater, all-glass round cross-section envelope, circular 8-pin/wire-ends*'''6789''' – 84.5 V Voltage-regulator tube,*'''6793''' – Vacuum SPDT relay operated by an external solenoid*'''6794''' – See 5966 vacuum gauge*'''6795''' – TR cell*'''6796''', '''6797''' – TR cell*'''6799''' – 35 GHz Pulsed Magnetron*'''6802''' – 4 kHz Neon-filled Dekatron with 4 output cathodes, Octal base*'''6805''' – Dual TR cell*'''6806''' – 35 kW, 1 GHz Water+forced-air cooled linear UHF beam power tetrode, center-tapped 2.7 V/1 kA resp. 1.35 V/2 kA resp. 2-phase (1[[Imaginary unit|+{{mvar|j}}]])×1.35 V/1 kA filament*'''6808''' – Gas-filled triode thyratron*'''6810''', '''6810A''', '''6810B''' – 14-Stage S11 photomultiplier, ''Bidecal'' base*'''6811''', '''6812''' – 2.5-5 GHz Reflex Klystrons*'''6814''' – Ruggedized, subminiature medium-μ triode, Silicon-free 6.3 V/150 mA heater, all-glass round cross-section envelope, circular 8-pin/wire-ends, for use in computer equipment*'''6816''' – Forced-air cooled beam power tetrode, 6.3 V/2.1 A heater*'''6826''' – 2.4-3.6 GHz Pulse-rated power Traveling-wave tube, 6.3 V/4 A heater, Duodecal base*'''6829''' – Dual medium-μ triode, Silicon-free, center-tapped 12.6 V/225 mA resp. 6.3 V/450 mA heater, Noval base, for use in computer equipment*'''6830''' (150 V), '''6831''' (108 V) – Subminiature voltage-regulator tubes*'''6832''' – Ruggedized, subminiature, low-microphonics, separate cathodes dual medium-μ UHF triode, 6.3 V/400 mA heater, all-glass round cross-section envelope, circular 8-pin/wire-ends base*'''6835''' = Raytheon '''QK464A''' – Single-[[electron gun]] ''recording [[storage tube]]'', 6.3 V/600 mA heater, an [[Composite video|analog video]] [[Freeze-frame shot|frame freezer]] tube. This was achieved by a CRT that writes the video image onto a thin, dielectric target and subsequently can read the generated charge pattern up to 30000 times from that target, producing a video signal containing a static shot that resembles a still photograph<ref>{{cite web |url=https://frank.pocnet.net/sheets/138/6/6835.pdf |publisher=[[Raytheon Technologies|Raytheon Company]] |title=''CK6835 Recording storage tube'' data sheet |date=1 November 1959 |access-date=1 May 2017}}</ref>*'''6836''' – 16-Stage S1 photomultiplier*'''6839''' – Image converter*'''6840''' – Dual triode, Silicon-free, center-tapped 12.6 V/400 mA resp. 6.3 V/800 mA heater, Noval base, for use in computer equipment*'''6841''' – Pulsed Magnetron*'''6842''' – Power pentode for use as 4 kV, 10 mA shunt regulator, anode on top cap*'''6844''', '''6844A''' – Digital indicator (Nixie)*'''6845''' – 8.5-9.6 GHz Reflex Klystron, 6.3 V/ heater*'''6848''' – 2 kW, 800 MHz Forced-air cooled, ceramic/metal VHF power tetrode for use in grounded-grid amplifiers*'''6849''' – 1.6" Image orthicon*'''6850''' – 6524 Dual beam power tetrode with a 12.6 V/625 mA heater*'''6851''' – Hard glass, dual high-μ triode, Noval base*'''6853''' – Ruggedized, pre-aged, hard glass, full-wave rectifier, Octal base*'''6854''' – Hard glass, dual triode, Noval base*'''6855''' = '''716''' – 1.25 kV, 1 A Gas/Mercury-vapor thyratron*'''6856''' (Pins), '''6857''' (Lugs), '''6858''' = '''760''' (Pins), '''6859''' (Lugs) – Triode thyratrons, negative control characteristic*'''6860''' = '''ELC6J/F''' – Gas-filled triode thyratron*'''6861''' – 2.7-3.5 GHz Signal Traveling-wave tube, 5 V/650 mA heater, Octal base and N connectors*'''6864''' – Xenon-filled triode thyratron*'''6865''', '''6865A''' – Pulsed Magnetron, 13.75 V/3.15 A heater, for use as tunable type*'''6866''' – Display storage CRT*'''6867''' – 8.5-9.6 GHz Signal Traveling-wave tube, 6.3 V/850 mA heater, Duodecal base and N connectors*'''6868''' – 1.7-4 GHz Power Traveling-wave tube, 6.3 V/2.5 A heater, Duodecal base and N connectors*'''6870''' – Ruggedized VHF power pentode, Noval base*'''6871''' – Xenon-filled triode thyratron*'''6873''' – Subminiature, gas filled, cold cathode trigger tube*'''6874''' – Pulsed Magnetron*'''6877''' – 12 W Power triode, 6.3 V/800 A heater, Noval base, for use as series regulator in DC power supplies*'''6878''' – Ignitron*'''6879''' – 100 kHz Dekatron with 4 output cathodes, Miniature 7-pin base*'''6881''' – Argon-filled noise diode*'''6882''' – Neon-filled noise diode, 9-15 VDC/170 mA heater*'''6883''', '''6883A''', '''6883B/8032A/8552''' – RF/AF Beam Power pentode, 12.6 V/625 mA heater, Octal base*'''6884''' – Forced-air cooled beam power tetrode, 26.5 V/520 mA heater*'''6885''', '''6886''' – 250 W, 3 GHz Planar power triode*'''6887''' – Dual diode, 6.3 V/200 mA heater, Miniature 7-pin base*'''6888''' – Dual-control pentode, 6.3 V/800 mA heater, Octal base, for use in computer equipment*'''6889''' – Beam power tetrode, 6.3 V/1.2 A heater, 5-pin Octal base*'''6890''' – ATR cell*'''6891''' – 8.5-9.6 GHz Signal Traveling-wave tube, 5.5 V/530 mA heater, 0.4×0.9" [[waveguide]] I/O*'''6893''' – VHF Beam power tetrode, 12.6 V/400 mA heater, Octal base*'''6894''' (Jumbo base), '''6895''' (Superjumbo base) – Mercury-vapor half-wave rectifier, 5 V/10 A heater, 4-pin base*'''6896''' – Display storage CRT*'''6897''' – 2.5 GHz Ceramic/metal disk-seal planar triode, 6.3 V/1.03 A heater*'''6898''' – Half-wave rectifier*'''6901''' – Gas/Mercury-vapor triode thyratron; long-life variant of the 393A*'''6902''' – 17.5-27 GHz Backward-wave oscillator, 12 V/1.2 A heater*'''6903''' – 10-Stage UV-sensitive S13 photomultiplier, Diheptal 14-pin base*'''6904''', '''6905''', '''6906''' – TR cells*'''6907''' – Dual RF power tetrode*'''6908''' – 150 kV, 10 A Half-wave rectifier for immersion in oil*'''6909''' – 100 kHz Dekatron with 4 output cathodes, Octal base*'''6910''' – 100 kHz Dekatron with 10 output cathodes, Duodecal base*'''6911''' – 10-Stage IR-sensitive photomultiplier*'''6912''' – ''Resitron'' Video camera tube*'''6913''' – Dual triode for use in high-speed computer equipment, center-tapped 12.6 V/300 mA resp. 6.3 V/600 mA heater, Noval base*'''6914''', '''6914A''' – Image converter*'''6916''' – Halogen-quenched γ Geiger-Müller tube*'''6917''' – 2-4 GHz Voltage-tunable Magnetron*'''6922/E88CC''' – Dual triode, Noval base*'''6923''' – 1 GHz ''Rocket''-type diode*'''6927''' – Dual triode, Miniature 7-pin base*'''6928/6AQ5L''' – Power pentode, Miniature 7-pin base*'''6929''' – Image converter*'''6930''' – Half-wave Mercury-vapor rectifier*'''6931''' – 3 kV Corona voltage-regulator tube*'''6932''' – Subminiature, directly heated, dual-control pentode , 1.25 V/20 mA filament, all-glass round cross-section envelope, 6-pin/wire-ends*'''6935''' – 10-stage S11 photomultiplier*'''6937''' – <sup>10</sup>Boron trifluoride-filled, thermal neutron-counting ionization chamber*'''6938''' – <sup>10</sup>Boron trifluoride-filled, thermal neutron-counting proportional chamber*'''6939''' – Dual power pentode, center-tapped 12.6 V/300 mA resp. 6.3 V/600 mA heater, Noval base; 7645 with a 500 MHz internal neutralization*'''6940''' = Bendix '''TK58''' – 8.5-9.6 GHz Reflex Klystron, 6.3 V/ heater*'''6941''', '''6941A''' – Nitrogen/Argon-filled [[ionization chamber]] with [[Enriched uranium|enriched <sup>235</sup>Uranium]] [[Uranium oxide|oxide]]-coated Aluminium electrodes for [[Neutron temperature#Thermal neutrons|thermal neutron]] detection*'''6942''' – 1.5 kW, 900 MHz Ceramic/metal UHF power tetrode for use in grounded-grid amplifiers*'''6943''' – Ruggedized, subminiature sharp-cutoff RF pentode, 6.3 V/150 mA heater, all-glass round cross-section envelope, circular 8-pin/wire-ends*'''6946''' – Ruggedized, subminiature medium-μ triode, 6.3 V/175 mA heater, all-glass round cross-section envelope, circular 8-pin/wire-ends*'''6947''' – Ruggedized, subminiature dual medium-μ triode, 6.3 V/350 mA heater, all-glass round cross-section envelope, circular 8-pin/wire-ends*'''6948''' – Ruggedized, subminiature dual high-μ triode, 6.3 V/350 mA heater, all-glass round cross-section envelope, circular 8-pin/wire-ends*'''6949''' – 500 kW, 75 MHz Water-cooled shielded-grid beam triode, 7.3-7.8 V/1040-1130 A heater*'''6950''' – 1.5 kW, 200 MHz Ceramic/metal, water-cooled, shielded-grid, pulsed beam power triode*'''6952''' (Overall length 8.62"), '''8587''' (overall length 9.19") – 2 MW<sub>peak</sub>, 425 MHz Avionics, [[Ethylene glycol#Coolant and heat-transfer agent|ethylene glycol]] or [[FC-75]]-cooled, pulse-rated beam power tetrode, 0.95-1.05 V/495 A heater*'''6953''' – S1 Phototube*'''6954''' – Sharp-cutoff, dual-control pentode, Miniature 7-pin base*'''6955''' – Dual medium-μ triode, center-tapped 12.6 V/175 mA resp. 6.3 V/350 mA heater, Noval base*'''6957''' – See [[#6694|{{color|Green|6694}}]]*'''6958''' – Ignitron*'''6959''' = Raytheon '''QK172''' – Pulsed Magnetron*'''6960''' = '''TBW7/8000''' (Water-cooled), '''6961''' = '''TBL7/8000''' (Forced-air cooled) – RF Power triodes*'''6968''' – Ruggedized pentode, Silicon-free 6.3V heater, Miniature 7-pin base*'''6971''', '''6971A''' – Fission fragment counting, Nitrogen/Argon-filled [[ionization chamber]] with [[Enriched uranium|enriched <sup>235</sup>Uranium]] [[Uranium oxide|oxide]]-coated Aluminium electrodes for [[Neutron temperature#Thermal neutrons|thermal neutron]] detection*'''6972''' – Magnetron, 10 V/2.85 A heater*'''6974''' – 4.6-5 GHz Reflex Klystron, 6.3 V/700-900 mA heater*'''6975''' – 8.5-9.6 GHz Reflex Klystron, 6.3 V/400-500 mA heater*'''6977/DM160''' – First commercially available [[vacuum fluorescent display]], single segment, side-view, for use as flip-flop status indicator in transistorized computers. All-glass wire-ended, 1 V/30 mA filament; similar to ИВ-15↦IV-15; cf. 8569*'''6981''' – Bayard–Alpert vacuum gauge*'''6982''' (Full-wave), '''6983''' (half-wave) – Xenon-filled rectifiers with a Tantalum anode*'''6984''', '''6985''', '''6986''', '''8065''', '''8066''' – Xenon-filled triode thyratrons*'''6987''' = '''ELC6C''', '''6988''' = '''ELC6J/L''', '''6989''' = '''ELC6J/KL''' – Xenon-filled triode thyratrons with a Tantalum anode*'''6990''', '''6991''', '''6992''' – Display storage CRTs*'''6993''' – Halogen-quenched γ Geiger-Müller tube*'''6996''' – 8-9.6 GHz Power Traveling-wave tube, 6.3 V/2.3 A heater, N connectors*'''6997''' – 2-3.3 GHz Power Traveling-wave tube, 6.3 V/5 A heater, N connectors*'''6998''' – <sup>10</sup>Boron trifluoride-filled, thermal neutron-counting proportional counter*'''6999''' – Subminiature pentode, center-tapped 2.64 V/50 mA resp. 1.32 V/100 mA filament, all-glass elliptical cross-section envelope with 6 inline wire-ends*'''7002''' (Oil or other dielectric liquid-cooled, 65 kV), '''7003''', '''7003A''' (Forced-air or dielectric gas-cooled, 40 kV), '''7715''' (Forced-air or dielectric gas-cooled, 65 kV) – 3 kW Power triode for use in ''hard-tube pulser'' modulators*'''7004''' = '''TBL2/300''' – 300 W, 2 kV Forced-air cooled RF power triode*'''7007''' – See 6166A*'''7008''' = '''YJ1010''' = CSF '''F1103A''' – Forced-air cooled Magnetron, 13.75 V/3.15 A heater*'''7009''' – <span style="background: black;font: Arial;color: #FF4000"> ''0 1 2 3 4 5 6 7 8 9'' </span> Miniature Neon-filled digital indicator tube, {{cvt|0.305|in|mm|1}} character height, top-viewing; similar to ZM1122*'''7014''' = '''604''' (B4D Superjumbo base), '''7015''' = '''604L''' ([[Lug (electrical connector)|Lug/spade connectors]]) – 900 V, 2.5 A Full-wave Argon/Mercury-vapor rectifier*'''7016''' = '''606''' (B4D Superjumbo base), '''7017''' = '''606L''' (Lugs) – 900 V, 6.4 A Full-wave Argon/Mercury-vapor rectifier*'''7018''' = '''615''' – 2 kV, 2.5 A Half-wave Argon/Mercury-vapor rectifier*'''7019''' = '''635''' (B4D Superjumbo base), '''7020''' = '''635L''' (Lugs) – 1 kV, 6.4 A Half-wave Argon/Mercury-vapor rectifier with anode on top cap*'''7021''' = '''714''' – 1.25 kV, 1 A Argon/Mercury-vapor thyratron, UX4 base with anode on top cap*'''7022''' = '''740L''' – 1.5 kV, 4 A Argon/Mercury-vapor thyratron, Lug connectors and anode on top cap*'''7023''' = '''760L''' – 1.5 kV, 6.4 A Gas/Mercury-vapor thyratron with lugs and anode on top cap*'''7027''', '''7027A''' – AF Beam power tetrode, 6.3 V/900 mA heater, Octal base, for use as High-Fidelity*'''7028''' – Magnetron, 6.3 V/500 mA heater*'''7029''' – 10-Stage S17 photomultiplier, Duodecal base*'''7030''' – 30 kV Forced-air cooled, half-wave rectifier*'''7031''' – Triode thyratron, negative control characteristic*'''7032''' – Dual-control heptode with a ''short-base'' #3 grid and a Silicon-free 6.3 V/300 mA heater, 7-pin Miniature base, for use as a NAND gate in a coincidence circuit*'''7033''' – ''Tonotron'' 5" Display storage CRT*'''7034/4X150A''' – Forced-air cooled beam power tetrode, 6.0 V/2.6 A heater, special 8-pin base*'''7035/4X150D''' – Forced-air cooled beam power tetrode, 26.5 V/580 mA heater*'''7037''' – 1.8" Image Orthicon, 6.3 V/600 mA heater, Diheptal 14-pin base*'''7038''' – 0.62" Vidicon, 6.3 V/600 mA heater, ''Ditetrar'' 8-pin base*'''7044''' – Dual medium-μ triode, center-tapped 12.6 V/450 mA resp. 6.3 V/900 mA heater, Noval base, for use in computer equipment*'''7046''' – 14-Stage S11 photomultiplier, ''Thirtyfivear'' 21-pin base*'''7049''' (1.5-6 GHz), '''7505''' (0.7-3 GHz), '''7506''' (0.5-3 GHz) – ''Velocitron'' Reflex Klystrons*'''7054/8077''' – Power pentode, 13.5 V/275 mA heater, Noval base*'''7055''' – Dual diode, 13.5 V/155 mA heater, Miniature 7-pin base*'''7056''' – Sharp-cutoff pentode, 13.5 V/150 mA heater, Miniature 7-pin base*'''7057''' – Dual medium-μ triode, 13.5 V/180 mA heater, Noval base*'''7058''' – Dual high-μ triode, 13.5 V/155 mA heater, Noval base*'''7059''' – Medium-μ triode + sharp-cutoff pentode, 13.5 V/195 mA heater, Noval base*'''7060''' – Medium-μ triode + power pentode, 13.5 V/280 mA heater, Noval base*'''7061''' – Beam power tetrode, 13.5 V/210 mA heater, Noval base*'''7062/E180CC''' – Separate cathodes dual triode for use as a flip-flop in computers, Silicon-free, center-tapped 6.3 V/400 mA resp. 12.6 V/200 mA heater, Noval base, not recommended where low hum or microphony or noise is critical*'''7064''', '''7065''' – 10-Stage S11 photomultiplier*'''7072''' – 2-4 GHz Power Traveling-wave tube, 6.3 V/1.1-1.5 A heater*'''7079''' – Ruggedized, subminiature dual triode, 6.3 V/300 mA heater, all-glass round cross-section envelope, circular 8-pin/wire-ends*'''7083''' = Raytheon '''CK631''' – Ruggedized, subminiature pentode, 6.3 V/200 mA heater, all-glass round cross-section envelope with 7 inline wire-ends; similar to 5702-WA*'''7085''' – 22.5 kW, 25 MHz Water-cooled power triode*'''7086''' – Xenon-filled thyratron, 2.5 V/92 A heater*'''7087''', '''7087A''' – <sup>10</sup>Boron trifluoride-filled, thermal neutron-counting proportional counter*'''7090''' – Magnetron, 5.3 V/3.2 A heater*'''7091''' – Forced-air cooled Magnetron, 5 V/32 A heater*'''7092''' = '''TB5/2500''' – 2.5 kW, 5 kV Radiation-cooled power triode*'''7093''' – Magnetron, 4 V/4 A heater*'''7094''' – Forced-air cooled beam power tetrode, 6.3 V/2.85 A heater, Septar base*'''7098''' – Magnetron*'''7099''' – 155 V Voltage-regulator tube*'''7101''' – Gas-filled noise diode*'''7102''' – 10-Stage S1 photomultiplier, Duodecal base*'''7110''' – Magnetron*'''7111''' – Forced-air cooled Magnetron, 13.75 V/3.15 A heater*'''7112''' – Magnetron*'''7116''' – 8.5-9.6 GHz Signal Traveling-wave tube, 3.5 V/860 mA heater, 0.4×0.9" [[waveguide]] I/O*'''7117''' – 9-Stage S4 photomultiplier*'''7119/E182CC''' – Dual triode, Silicon-free, center-tapped 12.6 V/320 mA resp. 6.3 V/640 mA heater, Noval base, for use in computer equipment*'''7120''' (Water-cooled, 12.5 kW), '''7121''' (Forced-air cooled, 10 kW) – 30 MHz Linear power triodes based on 6420 and 6421*'''7124''' (Water-cooled, 40 kW), '''7125''' (Forced-air cooled, 20 kW) – Linear AF Power triode*'''7131''' (Forced-air cooled), '''7132''' (water-cooled) – 40 kV Half-wave rectifier*'''7136''' – Half-wave Mercury-vapor rectifier, upgraded drop-in replacement for the 575A*'''7137''' – Medium-μ triode for use in grounded-grid amplifiers, 6.3 V/225 mA heater, 7-pin Miniature base*'''7138''', '''7139''', '''7140''', '''7141''', '''7142''', '''7143''' – Magnetrons*'''7147''', '''7148''' (Neon) – Gas-filled noise diode*'''7150''' – Frame-grid tetrode, 9-pin base*'''7151''' – Ignitron*'''7153''' – <span style="background: black;font: Arial;color: #FF4000"> ''0 1 2 3 4 5 6 7 8 9'' </span> Neon-filled digital indicator tube, {{cvt|0.808|in|mm|1}} character height, top-viewing*'''7154''' – Gas-filled noise diode*'''7155''' – 100 kHz Dekatron with 3 output cathodes, Miniature 7'pin base*'''7156''' – Magnetron*'''7167''' – Sharp-cutoff tetrode, 12-15 V/90 mA heater, Miniature 7-pin base*'''7169''', '''7170''' – Bayard–Alpert vacuum gauge*'''7171''' – Ignitron*'''7177''' – Image converter tube*'''7178''' – Pulse rectifier*'''7179''', '''7180''' – Ignitrons*'''7182''' – Magnetron*'''7183''' – Display storage CRT*'''7183''', '''7183A''' – Display storage CRT*'''7186''', '''7187''' – Nitrogen/Argon-filled flux-mapping [[ionization chamber|fission chamber]] with [[Enriched uranium|enriched <sup>235</sup>Uranium]] [[Uranium oxide|oxide]]-coated Aluminium electrodes for underwater [[Neutron temperature#Thermal neutrons|thermal neutron]] detection*'''7188''' – Fission fragment counting, Nitrogen/Argon-filled ionization chamber with enriched <sup>235</sup>Uranium oxide-coated Aluminium electrodes for thermal neutron detection*'''7189''', '''7189A''' – AF Beam power tetrode, 6.3 V/760 mA heater, Noval base*'''7190''', '''7191''', '''7192''' – Hydrogen triode thyratrons, Miniature 7-pin base*'''7198''', '''7198A''' – 1.8" Ruggedized S10 Image Orthicon*'''7199''' – Medium-μ triode + sharp-cutoff pentode, 6.3 V/450 mA heater, Noval base, for use as Preamplifier (P); Phase Inverter (T)*'''7200''' – 9-Stage S19 photomultiplier, 11-pin ''Submagnal'' base*'''7203/4CX250B''' (6.0 V/2.5 A heater), '''7204/4CX250F''' (26.5 V/580 mA heater), '''8621/4CX250FG''' (26.5 V/540 mA heater) – Forced-air cooled beam power tetrode*'''7205''' – Cold-cathode trigger triode*'''7208''', '''7208A''', '''7208B''' – Pulsed Magnetron*'''7209''' – 35 W, 3 GHz ''Oil can''-type Forced-air cooled planar UHF power triode*'''7210''' – 100 W, 3 GHz Forced-air cooled power triode*'''7211''' (Forced-air cooled), '''7698''' (contact/conduction cooled) – 100 W, 1 GHz Power triodes with a {{Tooltip|''Phormat''|Indirectly heated disc with an oxide coating impregnated in a Nickel matrix}} cathode<ref name="MachlettALseries1968">"Machlett UHF triodes Extended Life AL Series Tubes for Airline Operation" ([[Machlett Laboratories]], October 1968), as attachment #4 in: [https://ntrs.nasa.gov/api/citations/19740005837/downloads/19740005837.pdf 20 KILOVOLT ROCKET BORNE ELECTRON ACCELERATOR (22MB)], pp.217ff (Ion Physics Corporation, November 1973)</ref>*'''7212''' = '''6146-W''' – Beam power tetrode, 6.3 V/1.25 A heater, Octal base*'''7213''', '''7214''' – Forced-air cooled beam power tetrodes, 5.5-6 V/7.3 A heater*'''7214''' – 1.5 kW, 1.215 GHz Ceramic/metal pulse-rated beam power tetrode*'''7215''' – Water-cooled power triode*'''7216''' – Xenon-filled triode thyratron with a Tantalum anode*'''7217''' – 20 kV half-wave Mercury-vapor rectifier*'''7222''' – ''Tonotron'' 5" Display storage CRT*'''7223''' (Head-on), '''7224''' (side-on) – Early [[Germanium]] S14 [[Photodiode]]s*'''7225''' – 3" Display storage CRT*'''7226''', '''7226A''' – 5⁄8" Vidicons*'''7228''' – 5" Display storage CRT*'''7233''' – 8 W Power triode, 6.3 V/1.0 A heater, Noval base, for use as series regulator in DC power supplies*'''7234''' – Power pentode for use as 8 kV, 5 mA shunt regulator, anode on top cap*'''7237''' – 6 kW, 30 MHz Forced-air cooled power triode*'''7240''' – Hydrogen triode thyratron, Miniature 7-pin base*'''7242''' – Triple-cathode power triode with Zirconium-coated Graphite anode, 6.3 V/7.5 A heater, ''Giant 7-pin'' base*'''7246''' – Subminiature triode, 1.25 V/150 mA filament, all-glass elliptical cross-section envelope with 4 inline wire-ends*'''7247''' – Dual dissimilar triode, center-tapped 12.6 V/150 mA resp. 6.3 V/300 mA heater, Noval base*'''7243''' – <sup>10</sup>Boron trifluoride-filled, thermal neutron-counting proportional counter*'''7244''', '''7244A''' (Medium-μ), '''7245''', '''7245A''' (high-μ) – Ruggedized, dual frame-grid triode, Noval base*'''7248''' (Oil-cooled, 200 W, 125 kV), '''7249''' (larger dissipator, oil or forced-air cooled, 350 or 200 W, 125 or 65 kV) – Power triode for use in ''hard-tube pulser'' modulators*'''7255''' – Water-cooled power triode*'''7256''' = Raytheon '''QKH713''' – Pulsed Magnetron*'''7257''' – Image intensifier tube*'''7258''' – Medium-μ triode + sharp-cutoff pentode, Noval base; similar to 6AN8*'''7262''', '''7262A''', '''7263''', '''7263A''' – Vidicons, 6.3 V/95 mA heater, 8-pin ''Ditetrar'' base*'''7263''' – Vidicon, 6.3 V/95 mA heater, 8-pin ''Ditetrar'' base*'''7264''' (S11), '''7265''' (S20) – 14-Stage S20 photomultiplier, ''Bidecal'' base*'''7268''', '''7268A''', '''7268B''' – Display storage CRT*'''7269''' – Mercury-vapor triode thyratron, negative control characteristic*'''7270''' (6.3 V/3.1 A heater), '''7271''' (13.5 V/1.25 A heater) – Forced-air cooled beam power tetrode, Septar base*'''7290''' – [[Slow-scan television|Slow scan]] vidicon*'''7291''', '''7291A''' – 0.62" Vidicon*'''7292''' – Magnetron, 5 V/32 A heater*'''7293''', '''7293A''', '''7293A/L''' (Longer-life, non-deteriorating glass target) – Image Orthicon; supersedes 5820*'''7294''' – Image Orthicon; supersedes 6474*'''7295''', '''7295A''', '''7295B''', '''7295B/L''', '''7295C''' – Image Orthicons*'''7297''', '''7298''', '''7299''', '''7306''', '''7307''' – Triode thyratrons, negative control characteristic*'''7308/E188CC''' – Dual triode, Noval base*'''7311''' – 6L6 AF beam power tetrode with a ceramic/metal envelope and a Miniature 7-pin base*'''7312''' – Ceramic/metal low-μ triode with a Miniature 7-pin base*'''7313''' – Ceramic/metal half-wave rectifier with a Miniature 7-pin base*'''7314''' – 6AG7 AF beam power tetrode with a ceramic/metal envelope and a Miniature 7-pin base*'''7315''' – Display storage CRT*'''7317''' – <sup>10</sup>Boron trifluoride-filled, thermal neutron-counting proportional counter*'''7318''' – Pulse-rated dual power triode, Noval base*'''7319''' – Xenon-filled triode thyratron with a Tantalum anode*'''7320/E84L''' – 6 W Ruggedized power pentode for use in AF amplifiers and stabilized power supplies, Silicon-free heater, Noval base*'''7321''' – Xenon-filled triode thyratron*'''7322'''= EG&G '''1822''' – Ceramic/metal Hydrogen triode thyratron*'''7323''' – Subminiature Neon-filled thyratrons for use as a top-viewing latching indicator, 1.25 V/280 mA heater, all-glass wire-ended*'''7325''', '''7336''' – ⅝" S18 Vidicon*'''7326''' – 10-Stage S20 photomultiplier, Diheptal 14-pin base*'''7327''' – Ruggedized, pulse-rated upgrade for 6021 and 6111 subminiature dual triode*'''7328''', '''7328A''' – 20 kW Forced-air cooled AF Power triode*'''7333''', '''7334''', '''7335''' – Power triodes for use in ''hard-tube pulser'' modulators*'''7351''', '''7351A''' – 0.62" ''Resitron'' Video camera tube*'''7353''' – Boron-lined, Nitrogen-filled, thermal neutron-counting ionization chamber*'''7355''' – AF Beam power pentode, 6.3 V/800 mA heater, 6-pin Octal base*'''7356''' – Display storage CRT*'''7357''' = '''6159-W''' – See 6159-W*'''7358''' – Ruggedized beam power tetrode for use in ''hard-tube pulser'' modulators*'''7363''' – Gas-filled triode thyratron with negative control characteristic*'''7370''' – 5687 Dual triode with a center-tapped 40 V/130 mA resp. 20 V/260 mA heater*'''7371''' – 75 W, 175 MHz Linear beam power pentode for use as SSB amplifier*'''7377''' – Dual RF power tetrode*'''7378''' – 100 W, 30 MHz Linear power tetrode, B5D/U5G ''Giant 5-pin'' UY base*'''7381''' – TR cell*'''7382''' – Low-hum, high-μ AF triode, Miniature 7-pin base*'''7383''' – ''Permachon'' Pickup storage video camera tube*'''7384''' – Hydrogen tetrode thyratron*'''7386''' – Xenon triode thyratron*'''7389''', '''7389A''', '''7389B''', '''7389B/L''', '''7389C''' – 4½" Image Orthicon, supersedes the 7295*'''7390''', '''7390A''' – Ceramic/metal Hydrogen triode thyratron*'''7391''' – 6 GHz Ceramic/metal disk-seal planar triode, 6.3 V/380 mA heater*'''7393''' – 4-8 GHz Signal Traveling-wave tube, 6.3 V/300 mA heater, N connectors*'''7394''' – 8-12 GHz Signal Traveling-wave tube, 6.3 V/300 mA heater, N connectors*'''7398''' – 2.2-3.85 GHz Voltage-tunable Magnetron*'''7399''' – L-band Ceramic/metal power tetrode for use in grounded-grid amplifiers*'''7400''', '''7401''' – Subminiature Neon-filled cold-cathode thyratrons for use as a top-viewing latching indicator, all-glass wire-ended; similar to 395A, МТХ-90*'''7403''' – Beam power tetrode, 6.3 V/1.7 A heater, 6-pin Octal base*'''7404''' – Image converter*'''7408''' – Beam power tetrode, 6.3 V/450 mA heater, 7-pin Octal base*'''7413''' – Hard pulse modulator power triode*'''7423''' – ''Iatron'' Display storage CRT*'''7432''' – Subminiature RF pentode, 6.3 V/175 mA heater, all-glass round cross-section envelope, circular 8-pin/wire-ends*'''7433''' – Subminiature pentode, 6.3 V/200 mA heater, all-glass round cross-section envelope, circular 8-pin/wire-ends*'''7434''' – Subminiature pentode, 6.3 V/200 mA heater, all-glass round cross-section envelope, circular 8-pin/wire-ends*'''7435''' – Subminiature diode, 6.3 V/150 mA heater, all-glass round cross-section envelope, circular 8-pin/wire-ends*'''7436''' – Subminiature half-wave rectifier, 6.3 V/400 mA heater, all-glass round cross-section envelope, circular 8-pin/wire-ends*'''7437''' – Subminiature triode, 6.3 V/150 mA heater, all-glass round cross-section envelope, circular 8-pin/wire-ends*'''7438''' – Subminiature dual-control pentode, 6.3 V/175 mA heater, all-glass round cross-section envelope, circular 8-pin/wire-ends*'''7444''' – Pulsed Magnetron*'''7448''' – Image converter*'''7449''', '''7449A''' – Pulsed Magnetron*'''7452''' – Pulsed Magnetron*'''7454''', '''7455''' – Clipper Hydrogen thyratrons*'''7457''' (d×l 1.265×1.930"), '''8596''' (d×l 1.327×2.036") – 1.215 GHz Ceramic/metal disk-seal beam power tetrode, 6.3 V/3.2 A heater*'''7459''' – VHF Power triode for use in TV transmitters*'''7461''' – Pulsed Magnetron*'''7462''' – Miniature ceramic/metal disk-seal planar UHF triode; PCB variant of 7077, 6.3 V/240 mA heater*'''7463''' – 12 kW, 60 MHz Forced-air cooled power triode*'''7464''' – 8 kW Water-cooled AF power triode*'''7475''' – 100 V Neon-filled voltage-regulator tube*'''7479''', '''7479A''' – Water/vapor-cooled power triode*'''7480''', '''7480A''' – See 6696*'''7482''' – 200 kW, 30 MHz Water/vapor-cooled ceramic/metal power triode*'''7484''' – Magnetron*'''7489''' – Ruggedized dual low-μ AF triode, Silicon-free center-tapped 12.6 V/150 mA resp. 6.3 V/300 mA heater, Noval base*'''7490''' – Ruggedized dual medium-μ AF triode, Silicon-free center-tapped 12.6 V/300 mA resp. 6.3 V/600 mA heater, Noval base*'''7492''', '''7494''' – Ruggedized dual high-μ AF triode, Silicon-free center-tapped 12.6 V/150 mA resp. 6.3 V/300 mA heater, Noval base*'''7495''' – Ruggedized VHF beam power tetrode, Silicon-free 6.0 V/750 mA heater, Noval base*'''7496''' – Ruggedized remote-cutoff RF pentode, Silicon-free 6.3 V/300 mA heater, Miniature 7-pin base*'''7498''' – Ruggedized sharp-cutoff RF pentode, Silicon-free 6.3 V/300 mA heater, Miniature 7-pin base*'''7499''' – Ruggedized power pentode for use as CRT cathode driver, Silicon-free 6.0 V/750 mA heater*'''7500''' – Ruggedized AF beam power tetrode, Silicon-free 6.0 V/450 mA heater, Noval base*'''7502''' – Ruggedized Pentagrid converter, Silicon-free 6.0 V/300 mA heater, Miniature 7-pin base*'''7503''' – Pulsed Magnetron*'''7504''' – 2.2 MW<sub>peak</sub>, 1.24-1.36 GHz Liquid-cooled, pulse-rated 3-cavity Klystron, 16 V/7-9.5 A heater*'''7505''', '''7506''' – See 7049*'''7509''' – Triode thyratron, negative control characteristic*'''7513''', '''7513/L''' (Longer-life, non-deteriorating glass target) – S10 Image Orthicon*'''7521''' – Pulsed Magnetron*'''7522''' – ⅝" S18 Vidicon*'''7527''' – 400 W, 110 MHz Power tetrode, B5D/U5G ''Giant 5-pin'' UY base*'''7528''', '''7529''' – Pulsed Magnetron*'''7533''' – ''Pencil''-type tunable oscillator triode, 6.0 V/160 mA heater, for use in ''Radiosondes''*'''7534/E130L''' – Long-life power pentode, Octal base with anode on top cap*'''7535''' – Pulsed Magnetron*'''7537''' – 4.4-5 GHz Power Traveling-wave tube, 6.3 V/800 mA heater, Noval base and RG49/U [[waveguide]] I/O*'''7540''' – Water-cooled power triode*'''7541''' – Pulsed Magnetron*'''7543''' – Sharp-cutoff AF pentode, 6.3 V/300 mA heater, Miniature 7-pin base*'''7545''' – Forced-air cooled power triode for use in ''hard-tube pulser'' modulators*'''7547''' – Pulsed Magnetron*'''7550''' – Ruggedized, subminiature dual triode, 6.3 V/500 mA heater, all-glass round cross-section envelope, circular 8-pin/wire-ends, for use as Pulse*'''7552''', '''7553''' – ''Pencil''-type high-μ triodes, 6.3 V/225 mA heater*'''7553''' – 1 GHz ''Pencil''-type, ceramic/metal, high-μ triode, 6.3 V/225 mA heater*'''7556''' – Triode thyratron, negative control characteristic*'''7558''' – Beam power tetrode, 6.3 V/800 mA heater, Noval base*'''7559''' – [[Crowbar (circuit)|Crowbar]] Hydrogen triode thyratron*'''7560''' (Water-cooled, 175 kW), '''8317''' (forced-air cooled, 60 kW) – 30 MHz Power triode*'''7561''' – Long-life AF Power pentode, Silicon-free 25 V/300 mA heater, Octal base*'''7565''' – 4 kW Forced-air cooled AF Power triode*'''7566''' – [[Selectron tube|Radechon]], an early form of digital computer memory*'''7568''' – Crowbar Hydrogen triode thyratron*'''7570''', '''7571''', '''7575''' – Recording storage tubes*'''7576''' – Subminiature high-μ UHF power triode with 4 grid leads for use in grounded-grid amplifiers, 6.3 V/450 mA heater, all-glass round cross-section envelope, circular 8-pin/wire-ends*'''7577''' – ''Amplitron'' [[Crossed-field amplifier]]*'''7578''' – Pulsed Magnetron*'''7580''', '''7580-W''', '''8930''' (Larger anode cooler for high-altitude avionics service) – Forced-air cooled beam power tetrode, 6 V/2.6 A heater, Special 8-pin base*'''7581''', '''7581A''' – 6L6-GC AF beam power tetrode with controlled zero-bias characteristic and a low-loss Octal base*'''7583''' – Hydrogen triode thyratron*'''7589''' – Pulsed Magnetron*'''7590''' – Crowbar Hydrogen triode thyratron*'''7591''', '''7591A''', '''7591S''' – AF Beam power tetrode, 6.3 V/800 mA heater, 7-pin Octal base*'''7592''' – 5.4-5.9 GHz Water-cooled, pulse-rated power Traveling-wave tube, 6.3 V/3 A heater, Octal base with TNC input and N output connectors*'''7603''', '''7605''' – Crowbar Hydrogen triode thyratron*'''7604''' – 600 W, 60 MHz Power triode*'''7606''' – <sup>10</sup>Boron trifluoride-filled, thermal neutron-counting ionization chamber*'''7607''' – 28 W Linear beam power pentode, Octal base*'''7609''' – See 7034*'''7611''' = RCA '''4414''' – S10 Image orthicon; supersedes 5820*'''7619''' – Pulsed Magnetron*'''7621''' = EG&G '''HY-2''' – Ceramic/metal Hydrogen triode thyratron*'''7623''' = M-OV/GEC '''TT21''' (6.3 V/1.6 A heater), '''7624''' = M-OV/GEC '''TT22''' (12.6 V/800 mA heater) – 37.5 W AF/RF beam power tetrode up to 30 MHz, derived from KT88*'''7625''' – Miniature ceramic/metal disk-seal planar AF triode for use on PCBs, 6.3 V/215 mA heater*'''7626''' – Subminiature RF power pentode, 1.25 V/125 mA filament, all-glass elliptical cross-section envelope with 5 inline wire-ends*'''7629A''' – 1.8" S10 Image orthicon*'''7630''' = Raytheon '''QK702''' – Pulsed Magnetron*'''7631''' – Dual diode, Silicon-free 6.3 V/300 mA heater, Miniature 7-pin base*'''7632''' = Mullard '''ORP10''' – [[Indium antimonide|InSb]] mid-[[infrared]] [[photoresistor]], head-on, 2-pin wire-ended, max. sensitivity at λ = 6 µm*'''7633''' = Mullard '''ORP11''' – See [[#6694|{{color|Green|6694}}]]*'''7635''' = '''BA9/20''' – 7-11.5 GHz Backward-wave oscillator, 6.3 V/1.7 A heater*'''7636''' = '''BA16/10''' – 11-18 GHz Backward-wave oscillator, 6.3 V/1 A heater*'''7637''' = '''LA4/250''' (3.6-4.2 GHz), '''7638''' = '''LA9/3''' (7-11.5 GHz), '''7639''' = '''LA16/2''' (11.5-18 GHz), '''7640''' (2-4 GHz), '''7641''' (1.7-2.3 GHz) – Signal Traveling-wave tubes*'''7642''' – 1.7-2.3 GHz Power Traveling-wave tube, 6.3 V/1.75 A heater*'''7643/E80CF''' – Ruggedized triode + pentode, separate cathodes, Silicon-free heater, Noval base*'''7644''' – See 6299*'''7645''' – Dual RF power tetrode*'''7649''' – Forced-air cooled beam power tetrode, 6.3 V/3.2 A heater*'''7650''' – Forced-air cooled beam power tetrode, 6.3 V/7.85 A heater*'''7651''' – Forced-air cooled beam power tetrode, 6.3 V/7.5 A heater*'''7656''' – Pulsed rectifier*'''7657''' – Fission fragment counting, ionization chamber for thermal neutron detection*'''7658''' – 125 kV, 150 mA Oil-immersed, half-wave rectifier*'''7664''' – 10-Stage S13 photomultiplier*'''7665''', '''7666''', '''7667''' – Ceramic Hydrogen thyratrons*'''7668''' – Power triode for use in ''hard-tube pulser'' modulators*'''7669''' – Modified 5551A Water-cooled Ignitron*'''7670''' – Coaxial Ignitron*'''7671''' – Modified 5552A Water-cooled Ignitron*'''7672''', '''7673''' – Coaxial Ignitrons*'''7675''', '''7676''' – Bayard–Alpert vacuum gauges*'''7677''' – Thermocouple vacuum gauge*'''7680''' – 1-2.3 GHz Voltage-tunable Magnetron*'''7681''' – Ignitron*'''7682''' – Display storage CRT*'''7683''' – Beam power pentode for use as 1 kV, 20 mA shunt regulator*'''7685''' – 600 W, 60 MHz Linear triode for use as SSB amplifier*'''7686''' – Noise diode*'''7687''' – Low-noise triode + pentode, 6.3 V/500 mA heater, Noval base*'''7689''' – ''Compactron'' Triple high-μ triode*'''7690''' – ''Compactron'' Triple medium-μ triode*'''7691''' – Hard pulse modulator power triode*'''7692''', '''7692A''' – Pulsed Magnetron*'''7693''' (Sharp-cutoff), '''7694''' (remote-cutoff) – Ruggedized RF pentodes, Miniature 7-pin base*'''7695''' (50 V/150 mA heater), '''7754''' (6.3 V/1.2 A heater) – 16 W AF Beam power tetrodes, Noval base*'''7696''' – 10-Stage S11 photomultiplier*'''7697''' – ⅝" S18 Image orthicon*'''7698''' – See 7211*'''7701''' – 175 MHz Beam power pentode, 13.6 V/160 mA heater, Noval base*'''7702''' – See 7570*'''7703''' – Ignitron*'''7704''' = '''QBL5/4000''' – Forced-air cooled RF power tetrode*'''7715''' – See 7002*'''7717/6CY5''' – Sharp-cutoff tetrode, 6.3 V/200 mA heater, Miniature 7-pin base*'''7718''' – Pulsed Magnetron*'''7719''' – High-[[perveance]] triode, Silicon-free center-tapped 12.6 V/225 mA resp. 6.3 V/450 mA heater, Noval base, for use in computer equipment*'''7721''' = Siemens '''D3a''' – RF Pentode, Silicon-free 6.3 V/315 mA heater, Noval base*'''7722/E280F''' – 300 MHz Ruggedized, wideband pentode for use as low-noise amplifier, Silicon-free heater, Noval base*'''7723''' = '''610''' – Gas-filled half-wave rectifier*'''7724/14GT8''' – Dual diode + high-μ triode, 14.0 V/150 mA heater, Noval base*'''7727''' – Subminiature electrometer pentode, 1.25 V/7.2-9.2 mA filament*'''7728''', '''7730''' – Dual medium-μ triode, Noval base; premium versions of 12AT7, 12AU7*'''7729''' – Dual high-μ triode, Noval base; premium version of 12AX7*'''7731''' – Medium-μ triode + sharp-cutoff pentode, Noval base; premium version of 6U8*'''7732''' – Sharp-cutoff pentode, Miniature 7-pin base; premium version of 6CB6*'''7735''', '''7735A''' (Commercial grade), '''7735B''' – Vidicon*'''7736''' – Ignitron*'''7737/E186F''' – Ruggedized, low-microphonics, wideband pentode, Noval base*'''7738''' – 200 MHz High-μ triode, Miniature 7-pin base*'''7739''' – 5 GHz Planar triode, 6.1 V/1.18 A heater*'''7740''' – Crowbar Ignitron*'''7741''' – Ionization chamber for thermal neutron detection*'''7745''' = '''4Y100D''' – 60 W Dual RF beam power tetrode*'''7746''' – 10-Stage S11 photomultiplier*'''7747''' – 26.5-40 GHz Backward-wave oscillator, 6.3 V/300 mA heater*'''7748''' – 35 kW, 30 MHz Water jacket-cooled power triode*'''7750''' – Hard pulse modulator power triode*'''7751/E235L''' – Ruggedized beam power pentode, Silicon-free heater*'''7753''' = '''TBL6/4000''' – Forced-air cooled RF power triode*'''7754''' – See 7695*'''7757''' – 14 W, 3 kV Ruggedized beam power tetrode, 6.3 V/600 mA heater, Noval base*'''7759''', '''7760''' – Ruggedized, subminiature dual medium-μ triodes, 26.5 V/90 mA heater, all-glass round cross-section envelope, circular 8-pin/wire-ends*'''7761''' – Ruggedized, subminiature video pentode, 26.5 V/110 mA heater, all-glass round cross-section envelope, circular 8-pin/wire-ends*'''7764''' – 6-Stage S11 photomultiplier*'''7767''' – 10-Stage S11 photomultiplier*'''7768''' – 4 GHz Miniature ceramic/metal disk-seal planar SHF triode*'''7782''' – Ceramic/metal Hydrogen triode thyratron*'''7783''' = Raytheon '''QKB691''' – 2-4 GHz Backward-wave oscillator, 6.3 V/1.3 A heater*'''7784''' – 3 GHz Ceramic/metal disk-seal planar triode, 6.3 V/300 mA heater*'''7785''' – 12.4-18 GHz Backward-wave oscillator, 6.3 V/840 mA heater*'''7786''' – Gas-filled half-wave rectifier*'''7788/E810F''' – Ruggedized wideband pentode, Silicon-free heater, Noval base with Gold-plated pins*'''7789''', '''7790''', '''7791''', '''7792''', '''7793''' – Hydrogen-filled half-wave rectifiers*'''7794''', '''7795''', '''7796''' – C W Magnetrons*'''7800''' – 15 kW, 30 MHz Forced-air cooled RF/AF power triode*'''7801''' – Ceramic/metal, coaxial beam power tetrode, 12.6 V/500 mA heater*'''7802''', '''7802-WA''', '''7802-WB''' – 2×13 W Dual power triode, 6.3 V/2.5 A heater, Octal base, for use as series regulator in DC power supplies*'''7803''' – 200 MHz Dual medium-μ triode, 6.3 V/365 mA heater, Noval base, for use in [[sonobuoys]]*'''7804''' = '''TBL6/14''' – Forced-air cooled RF power triode*'''7805''' = '''TBW6/14''' – Water-cooled RF power triode*'''7806''' = '''TBL12/38''' – Forced-air cooled RF power triode*'''7807''' = '''TBW12/38''' – Water-cooled RF power triode*'''7815/3CPN10A5''' (Conduction/convection cooled), '''7815AL''' (''AirLine quality'' long-life), '''7815R''' (forced-air cooled), '''7815RAL''' – 3 GHz Ceramic/metal disk-seal planar triode, ''Phormat'' cathode,<ref name="MachlettALseries1968" /> 5.8 V/1.0 A heater*'''7817''', '''7818''', '''7819''' – 10-Stage S11 photomultipliers*'''7820''' – 4.3 kW Ruggedized, forced-air cooled AF power triode*'''7821''', '''7823''' – TR cells*'''7824''' – 5.4-5.9 GHz Signal Traveling-wave tube, 6.3 V/770 mA heater, N connector*'''7832''' – 30 kW, 50 MHz Water/vapor-cooled, ceramic/metal power triode*'''7835''' – 300 kW, 300 MHz Water-cooled high-power triode, 3.1-4.2 V/6.6 kA heater*'''7837''' (Water jacket-cooled, 90 kW), '''7838''' (forced-air cooled, 25 kW), '''7839''' (forced-air cooled, 10 kW, pulse-rated) – 2 MHz Power triodes*'''7841''' – Miniature ceramic/metal disk-seal planar VHF diode, 6.3 V/215 mA heater*'''7842''' – 400 MHz Ruggedized, contact/conduction-cooled, ceramic/metal beam power tetrode, 6.3 V/3.2 A heater*'''7843''' (26.5 V/520 mA heater), '''7844''' (6.3 V/2.1 A heater) – 115 W, 400 MHz Contact/conduction-cooled, ''Cermolox'' ceramic/metal, coaxial, linear beam power tetrodes*'''7845''' – 3 kW Forced-air cooled, pulse-rated, shielded-grid power triode*'''7847''' – 5-6 GHz Power Traveling-wave tube, 6.3 V/2.2 A heater, TNC connectors*'''7850''' – 12-Stage S11 photomultiplier*'''7851''' – Electrometer triode, Miniature 7-pin base with control grid on top cap*'''7854''' – Dual RF power tetrode*'''7855''' (Forced-air cooled), '''7855AL''' (''AirLine quality'' long-life), '''7855K''' (Conduction/convection cooled), '''7855K/AL''' – 3 GHz Ceramic/metal planar power triode*'''7859''' – 1.7 kV Corona voltage-regulator tube*'''7860''' – Ruggedized 10-stage S11 photomultiplier*'''7866''' – Water-cooled, ceramic/metal Hydrogen tetrode thyratron*'''7867''' – 24 W AF Beam power tetrode, 6.3 V/2.5 A heater, Octal base with anode on top cap*'''7870''' – 7801 Beam power tetrode with a 6.3 V/1 A heater*'''7872''' – Hydrogen triode thyratron*'''7887''', '''7889''' – Ruggedized, subminiature dual medium-μ triode, 26.5 V/90 mA heater, all-glass round cross-section envelope, circular 8-pin/wire-ends*'''7888''' – Ruggedized, subminiature medium-μ UHF triode, 26.5 V/45 mA heater, all-glass round cross-section envelope, circular 8-pin/wire-ends*'''7890''' – Water-cooled, ceramic/metal Hydrogen tetrode thyratron*'''7892''' – Dual medium-μ triode, center-tapped 12.6 V/450 mA resp. 6.3 V/900 mA heater, Noval base*'''7894''' – 3 kV Corona voltage-regulator tube*'''7898''' – Dual high-μ triode, 13.5 V/150 mA heater, Noval base*'''7899''' – RF power tetrode for use in ''hard-tube pulser'' modulators*'''7900''' – 7459 Power triode with a [[Platinum]] grid*'''7901''', '''7902''' – TR cells*'''7903''', '''7904''' – Bayard–Alpert vacuum gauges*'''7905''' – 10 W Beam power tetrode, 6.3 V/650 mA quickstart heater, Noval base*'''7906''', '''7907''' – Half-wave rectifier*'''7908''' – Ruggedized 10-stage S11 photomultiplier*'''7909''' – 10-Stage S11 photomultiplier*'''7910''' – 7.5 GHz Miniature ceramic/metal disk-seal planar triode, 6.3 V/275 mA heater*'''7911''' – 6 GHz Miniature ceramic/metal disk-seal planar triode, 6.3 V/550 mA heater*'''7913''' – 400 MHz Miniature ceramic/metal disk-seal planar triode, 6.3 V/400 mA heater*'''7950''' – Pulsed Magnetron*'''7964''' – Triggered spark gap*'''7967''' – 1.8" S10 Image Orthicon*'''7971''' = EdiSwan '''S11E12''', '''7972''' = EEV '''C1158''' – Beam power tetrodes for use in DC power supplies*'''7973''' = EdiSwan '''S2E20''' – 5 W, 100 MHz Ruggedized beam power tetrode, Noval base*'''7974''' – 3 kW, 40 MHz Water-cooled power triode*'''7975''' – Forced-air cooled, half-wave rectifier*'''7976''' – Pulsed Magnetron*'''7977''' = Burroughs '''B4032''', '''7977A''' – <span style="background: black;font: Arial;color: #FF4000"> ''0 1 2 3 4 5 6 7 8 9'' </span> Miniature Neon-filled digital indicator tube, {{cvt|0.31|in|mm|1}} character height, top-viewing*'''7978''' – 5 kHz Neon-filled bidirectional Dekatron with 10 output cathodes, 13-pin base*'''7979''' – Subminiature Neon-filled thyratron for use as a latching indicator, 1.25 V/250 mA filament, all-glass round cross-section envelope, 4-pin/wire-ends*'''7980''' – 84 V Voltage-regulator tube, Miniature 7-pin base*'''7981''' = '''XR1/3200A''' – 1.5 kV, 3.2A Inert gas-filled triode thyratron with anode on top cap*'''7982''' – 35 kW Water-cooled AF power triode*'''7983''' – 2×7 W Dual VHF power tetrode internally neutralized for 200 MHz, 3.15 V/1.65 A filament, Noval base*'''7984''' – 20 W, 175 MHz ''Compactron'' Beam power tetrode, 13.5 V/580 mA heater*'''7986''' = '''TB2.5/400''' – See 5866*'''7988''', '''7989''', '''7990''', '''7991''', '''8286''', '''8287''', '''8290''', '''8291''', '''8293''' – Neon-filled noise diodes*'''7992''', '''7993''', '''7999''' – Argon-filled noise diodes*'''7994''' – Subminiature triode, 6.3 V/300 mA heater, all-glass round cross-section envelope, circular 8-pin/wire-ends*'''7995''' – Subminiature sharp-cutoff pentode, 6.3 V/300 mA heater, all-glass round cross-section envelope, circular 8-pin/wire-ends*'''7998''' – Coaxial Ignitron*'''8000''' – Power triode, 10 V/4.5 A heater, Jumbo 4-pin, Bayonet base*'''8001''' = '''4E27''' – 125 W Glass radial-beam power pentode*'''8002''' – 1.2 kW, 150 MHz Water+forced-air cooled power triode, 16 V/38 A heater*'''8003''' – 100 W Power triode, 10 V/3.25 A heater, U4J Jumbo base; similar to 211*'''8005''' – 75 W Power triode, 10 V/3.25 A heater, 4-pin Bayonet base*'''8008''', '''8008XE''' – Mercury-vapor half-wave rectifier, 5 V/7.25 A heater, B4D Superjumbo base*'''8012''', '''8012A''' – 40 W UHF Power triode, 6.3 V/1.92 A heater; supersedes type 1628*'''8013A''' – Half-wave rectifier, 2.5 V/5 A heater, 4-pin base*'''8014A''' – 400 W Forced-air cooled, pulse-rated power triode, 15.0 V/14.5 A heater*'''8016''' – Half-wave rectifier, 1.25 V/200 mA filament, 6-pin Octal base*'''8020''' = '''V40''' – Rectifier*'''8025''', '''8025A''' – 40 W, 500 MHz Power triode, 6.3 V/1.92 A heater, 4-pin base*'''8030''', '''8031''' – Argon-filled noise diodes*'''8032''', '''8032A''' ('''6883B''', '''8552''' – 13.5V heater), '''8298A''' ('''6146B''' – 6.3V heater) – 120 W, 60 MHz Beam power pentode*'''8033''' – 225 kW, 24 MHz Water-cooled power triode*'''8034''' – Half-wave rectifier*'''8035''' – 50 kHz Bidirectional Dekatron with 10 output cathodes, 13-pin base*'''8036''' – Ceramic/metal Hydrogen triode thyratron*'''8037''' – <span style="background: black;font: Arial;color: #FF4000"> ''0 1 2 3 4 5 6 7 8 9'' </span> Neon-filled digital indicator tube, {{cvt|0.61|in|mm|1}} character height, top-viewing*'''8038''', '''8040''', '''8041''', '''8044''' – Power triodes for use in ''hard-tube pulser'' modulators*'''8042''' = RCA '''4652''' – 90 W, 60 MHz Beam power tetrode, Octal base with anode on top cap*'''8043''' – Mercury-vapor triode thyratron, negative control characteristic*'''8045''' – 90 kW Water-cooled power triode*'''8049''' – S4 Phototube*'''8051''' – 1.8" S18 Vidicon*'''8052''' – 4.5-11 GHz Ruggedized ''Velocitron'' Reflex Klystron*'''8053''' (2"), '''8054''' (3"), '''8055''' (5") – 10-Stage S11 photomultipliers, Diheptal 14-pin base*'''8057''' – Bayard–Alpert vacuum gauge*'''8062''' – 10-Stage IR-sensitive photomultiplier*'''8063''' = '''XR1/1600A''' = '''ZT1011''' – 1 kV, 1.6 A Gas-filled triode thyratron with anode on top cap*'''8064''' – Ruggedized, subminiature semiremote-cutoff pentode, 26.5 V/45 mA heater, all-glass round cross-section envelope, circular 8-pin/wire-ends*'''8065''', '''8066''' – See 6984*'''8067''' – Display storage CRT*'''8068''' – 35 W Beam power tetrode, 6.3 V/900 mA heater, Octal base, for use as series regulator in DC power supplies*'''8072''' – 100 W, 60 MHz Linear beam power tetrode, Elevenar 11-pin base*'''8073''' – Dual-range fission fragment counting ionization chamber for thermal neutron detection*'''8074''', '''8075''' – Ionization chambers for thermal neutron detection*'''8077''' – See 7054*'''8078''' = '''TB4/1500''' – Radiation-cooled RF power triode*'''8079''' – Pulsed Magnetron*'''8080''' – Clamper/crowbar Hydrogen triode thyratron*'''8084''' – Sharp-cutoff frame-grid VHF pentode for use as [[frequency multiplier]], 13.5 V/160 mA heater, Miniature 7-pin base*'''8088''' – TR cell*'''8092''', '''8092A''', '''8093''', '''8093A''', '''8093A/L''' – Image Orthicons*'''8094/199''' – 110 kV Half-wave rectifier*'''8096''' – Subminiature low-noise, low-microphonics, high-μ triode, 6.3 V/200 mA heater, all-glass round cross-section envelope, circular 8-pin/wire-ends*'''8099''' – TR cell*'''8105''' – Ionization chamber*'''8106''' – 6 W RF Beam power tetrode, 13.5 V/250 mA heater, Noval base*'''8108''' – ''Lighthouse'' 12.5 W, 6 GHz Disk-seal power triode, Octal base*'''8109''', '''8110''' – Half-wave rectifiers*'''8111''' = '''344H''' – 3.35 to 3.65 GHz, 1.5 kW Power Traveling-wave tube, 6.3 V/2.5-3 A heater, TNC connectors*'''8116''' – Dual RF power tetrode*'''8117''' – Dual RF power tetrode*'''8118''' = '''YL1020''' – Dual RF power tetrode*'''8119''' = '''TBL2/400''' – Forced-air cooled RF power triode*'''8121''' – Forced-air cooled beam power tetrode, 13.5 V/1.3 A heater, ''Elevenar'' 11-pin base*'''8122''' – Forced-air cooled beam power tetrode, 13.5 V/1.3 A heater, ''Elevenar'' 11-pin base*'''8123''' – Pulsed Magnetron*'''8124''' – ''Storatron'' Display storage CRT*'''8128''' – 2.9-3.1 GHz Liquid-cooled, pulse-rated power Traveling-wave tube, 8 V/8 A heater; high-duty cycle version of the Raytheon QKW730 for use as a driver for the 8129*'''8129''' – 2.9-3.1 GHz ''Amplitron'' Liquid-cooled, pulse-rated [[Crossed-field amplifier]], waveguide output*'''8130''' – Display storage CRT*'''8134''', '''8134/V1''' – Vidicon*'''8136''' – 6DK6 Pentode with a Silicon-free 6.3 V/300 mA heater*'''8137''' – Ionization chamber for thermal neutron detection*'''8138''' – Triggered spark gap*'''8139''' – Display storage CRT*'''8148''' – 40 kW Water-cooled AF power triode*'''8149''', '''8150''' (Anode on top cap) – 35 W, 175 MHz ''Compactron'' Beam power pentode*'''8151''', '''8152''' – Argon-filled noise diodes*'''8154''' – 7-11 GHz Ruggedized signal Traveling-wave tube, 6.3 V/300 mA heater*'''8156''' – 11 W ''Compactron'' RF Beam power tetrode, 13.5 V/300 mA heater*'''8158''' – 12 kW Forced-air cooled, ceramic/metal AF power triode*'''8159''' = Eimac '''3CX10000A3''' (Medium-μ, 140 MHz), '''8160/3CX10000A7''' (high-μ, 160 MHz) – 12 kW Forced-air cooled, ceramic/metal power triode*'''8161/3CX2500A3''', '''8161R''' (mesh filament), '''8251''' (Cable connection) – 2.5 kW, 75 MHz Forced-air cooled power triode; ceramic/metal variants of the glass 8242/3X2500A3 and 8251/3X2500F3*'''8162/3CX3000F7''' = ITT '''3JC/171G''' – 3 kW Forced-air cooled ''Zero-Bias'' power triode*'''8163/3-400Z''' = '''YD1130''' – Power triode, 5.0 V/14.5 A heater*'''8164/3-1000Z''' – Power triode, 7.5 V/21.5-22.7 A heater*'''8165/4-65A''' – Beam power tetrode, 6 V/3.2-3.8 A heater, 5-pin Septar base*'''8166/4-1000A''' – Forced-air cooled beam power tetrode, 7.5 V/20-22.7 A heater, special ventilated 5-pin base*'''8167/4CX300A''' – Ceramic RF power tetrode, 6.0 V/2.85 A heater*'''8168/4CX1000A''' – 1 kW, 110 MHz Forced-air cooled, ceramic/metal radial-beam power tetrode, 6 V/9 A heater*'''8169/4CX3000A''' – 3 kW, 150 MHz Forced-air cooled, ceramic/metal radial-beam power tetrode, 9 V/39.5-43.5 A heater*'''8170/4CX5000A''' – 110 MHz, 5 kW Forced-air cooled, ceramic/metal, radial-beam power tetrode, 7.5 V/73-78 A heater; ruggedized version: 8170-W/4CX5000R*'''8171/4CX10000D''' – 110 MHz, 10 kW Ceramic/metal radial-beam power tetrode; 8170 with a larger cooler*'''8172/4X150G''' – 250 W, 500 MHz Forced-air cooled, glass/metal power tetrode*'''8173/4W20000A''' – 20 kW, 250 MHz Water-cooled power tetrode*'''8177''' – 1.2 kW, 500 MHz Forced-air cooled, ceramic/metal power tetrode*'''8179''' – 800 W, 30 MHz Radiation-cooled, linear power tetrode, B5D/U5G ''Giant 5-pin'' UY base*'''8184''' – 10 kW, 500 MHz Forced-air cooled, glass/metal beam peam power tetrode, 22 V/12.6 A heater*'''8187/4PR65A''' – 65 W Radiation cooled, pulse-rated radial-beam power tetrode, ''Pyrovac'' Zirconium-coated anode*'''8188/4PR400A''' – 400 W Radiation cooled, pulse-rated radial-beam power tetrode, ''Pyrovac'' Zirconium-coated anode*'''8189/4PR1000A''' – 1000 W Radiation cooled, pulse-rated radial-beam power tetrode, ''Pyrovac'' Zirconium-coated anode*'''8198''' = Eimac '''EM778''' – 5-11 GHz Power Traveling-wave tube, 6.3 V/600 mA heater*'''8203''' – Power triode, 6.3 V/160 mA heater, Nuvistor base*'''8205''' – Coaxial Ignitron*'''8212''' – Ruggedized medium-μ triode for use as cathode follower, 12.6 V/230 mA heater, Noval base*'''8213''' – Ruggedized, subminiature medium-μ triode for use as cathode follower, 12.6 V/230 mA heater, all-glass round cross-section envelope, circular 8-pin/wire-ends*'''8214''' – Ionization chamber for thermal neutron detection*'''8223/E288CC''' – Ruggedized, separate cathodes dual triode for use in wideband, low-noise IF, RF and cascode amplifiers, Silicon-free heater, Noval base*'''8224''' – 150 kV Half-wave rectifier*'''8225''' – 2-4 GHz Signal Traveling-wave tube, 6.17-6.34 V/700-1000 mA heater*'''8226''', '''8227''' (Pulse-rated) – 300 W, 400 MHz Forced-air cooled avionics beam power tetrode, 6.3 V/3.2 A heater*'''8228''' – 81 V Voltage-regulator tube,*'''8232''' = Varian '''VA128''' – 2.7-3.6 GHz Pulse-rated power Traveling-wave tube, 7.5 V/2 A heater*'''8233/E55L''' – Ruggedized wideband power pentode, 6.3 V/600 mA heater, Magnoval base with Gold-plated pins*'''8236''' – 30 MHz Beam power pentode, 6.3 V/2.5 A heater, Octal base; 6DQ5 with a hard glass envelope and a 50 W Graphite anode*'''8238/3X3000A1''', '''8239/3X3000F1''' (Cable connection) – 3 kW Forced-air cooled AF power triode, 7.5 V/49-54 A heater*'''8240/3W5000A1''', '''8241/3W5000F1''' (Cable connection) – 5 kW Water-cooled AF power triodes*'''8242/3W5000A3''', '''8243/3W5000F3''' (Cable connection) – 5 kW, 30 MHz Power triode; Water-cooled variants of the 8161/3CX2500A3 and 8251/3CX2500F3*'''8244/4CW2000A''' – 2 kW, 110 MHz Ceramic/metal power tetrode; Water-cooled variant of 8168/4CX1000A*'''8245/4CX250K''' (6.0 V heater), '''8246/4CX250M''' (26.5 V heater) – 250 W, 500 MHz Forced-air cooled, ceramic/metal radial-beam power tetrodes*'''8247/4PR125A''' – 125 W Radiation cooled, pulse-rated radial-beam power tetrode, ''Pyrovac'' Zirconium-coated anode*'''8248/4PR250C''' – 250 W Radiation cooled, pulse-rated radial-beam power tetrode, Tantalum anode*'''8249/4W300B''' – 300 W Water-cooled variant of 7203/4CX250B*'''8250''' – See 7289/3CX100A5*'''8251''' – See 8161/3CX2500A3*'''8252/4PR60B''', '''8252-W''' – 60 W Radiation cooled, pulse-rated radial-beam power tetrode*'''8254/EC1000''' – Triode*'''8255/E88C''' – 1 GHz Ruggedized UHF triode, quintuple grid pins for use as grounded-grid amplifier, Silicon-free heater, Noval base*'''8258''' – 2.32-2.68 GHz Pulse-rated power Traveling-wave tube, 6.86-7.14 V/1.2 A heater, N connectors*'''8268''' – 6 kW, 50 MHz Water-cooled power triode*'''8269''' – 6 kW, 50 MHz Forced-air cooled power triode*'''8270''' – 21 kV, 2.5 A Mercury-vapor triode thyratron*'''8278''' – 25 W AF Beam power tetrode, 6.3 V/1.2 A heater, Novar base*'''8279''' – 2.3-2.7 GHz Signal Traveling-wave tube, 6.0-6.6 V/800-1200 mA heater, N connectors*'''8280''' – 2.1-2.5 GHz Signal Traveling-wave tube, 6.9-7.5 V/800-1200 mA heater, N connectors*'''8281/4CX15000A''' – 15 kW,110 MHz Forced-air cooled, ceramic/metal power tetrode*'''8283/3CX1000A7''' – 1 kW, 220 MHz Forced-air cooled, ceramic/metal power triode*'''8288''', '''8289''' – Neon-filled noise diodes*'''8292''' – Argon-filled noise diode*'''8294''' = Bendix '''TK110''', '''8460''' = Bendix '''TK106''' – 25 mW, 8.5-9.66 GHz Reflex Klystron, 6.3 V/440 mA heater, Octal base; upgraded drop-in replacements for 2K25*'''8295''', '''8295A''' – 1 kW Forced-air cooled beam power pentode, Septar base*'''8296/4X150R''' (6.0 V heater), '''8297/4X150S''' (26.5 V heater) – 250 W, 150 MHz Ruggedized, forced-air cooled radial-beam power tetrode*'''8298A''' = '''6146B''' – See 6146B*'''8301''' – Water-cooled, ceramic/metal Hydrogen tetrode thyratron*'''8306''' – Crowbar Ignitron*'''8317''' – See 7560*'''8319''' – Ruggedized, subminiature, frame-grid, high-μ UHF triode, 6.3 V/150 mA heater, all-glass round cross-section envelope, circular 8-pin/wire-ends*'''8320''' – Display storage CRT*'''8321/4CX250A''' (6.0 V heater), '''8322/4CX250F''', '''8904/4CX250FJ''' (26.5 V heater) – 350 W Ruggedized, forced-air cooled ceramic/metal, linear AF radial-beam power tetrode*'''8326''' – Hydrogen thyratron*'''8330''', '''8331''' – TR cells*'''8332''' – 9.7-9.9 GHz Reflex Klystron*'''8334''' – Ruggedized UHF triode for use in grounded-grid amplifiers, 6.3 V/225 mA heater, Miniature 7-pin base*'''8335''' (1.7-5 GHz), '''8336''' (0.95-2.8 GHz), '''8337''' (1-4 GHz) – ''Velocitron'' Reflex Klystrons*'''8348''' = '''YL1080''' – Dual RF power tetrode*'''8349/4CX35000C''' – 35 kW, 30 or 110 MHz (Datasheets conflicting) Forced-air cooled ceramic/metal radial-beam power tetrode*'''8350/3CW50000C''' – 50 kW, 30 MHz Water-cooled, ceramic/metal power triode*'''8351/4CV100000C''' – 100 kW, 30 MHz Water/vapor-cooled, ceramic/metal power tetrode*'''8352/4CX1000K''' – 1 kW, 400 MHz Forced-air cooled, ceramic/metal power tetrode*'''8353''' – 4 kHz Neon-filled bidirectional Dekatron with 10 output cathodes, 13-pin base*'''8354''' – Ruggedized, ceramic/metal Hydrogen triode thyratron*'''8356''', '''8357''' – Magnetrons*'''8358''' – 6939 Power pentode with a direct 1.9 V/3.15 A heater*'''8360''' – Coaxial Ignitron*'''8370''' – Hydrogen triode thyratron*'''8375''', '''8376''' – Ceramic/metal, half-wave, Hydrogen rectifier*'''8379''' – 2.32-2.68 GHz Signal Traveling-wave tube, 5.0 V/650 mA heater, Octal base, N connectors*'''8380''' – Power tetrode, Nuvistor base*'''8401''', '''8402''' – Gas-filled noise diodes*'''8403''' – 100 W, 2.5 GHz Forced-air cooled planar power triode;<ref name="MachlettALseries1968" /> miniaturized variant of 7211<ref name="MachlettCathodePress1964">[https://www.worldradiohistory.com/hd2/IDX-CATALOGS/IDX/Miscellaneous/Machlett-Cathode-Press-1964-3-OCR-Page-0054.pdf Machlett UHF planar triodes]</ref>*'''8408''' = '''YL1130''' – Dual RF power tetrode*'''8412''' = '''YD1060''' – 30 W, 7 GHz Indirectly heated ''disk-seal'' ceramic/metal UHF power triode*'''8413''' = '''YD1070''' – 25 W, 7 GHz Indirectly heated ''disk-seal'' ceramic/metal UHF power triode*'''8415''' – 300 W, 300 MHz Forced-air cooled power triode*'''8417''' – 35 W AF Beam power pentode, 6.3 V/1.6 A heater, Octal base, for use in [[high fidelity]] amplifiers*'''8418''', '''8418A''', '''8418B''', '''8418C''', '''8418D''' – Vacuum gauge tube*'''8420''' – Coaxial Ignitron*'''8421''' = '''B5092''' – Digital indicator (Nixie)*'''8422''' = '''B5991''' – Digital indicator (Nixie)*'''8423''' = '''B6091''' – Digital indicator (Nixie)*'''8424''' – Thyratron*'''8425''', '''8425A''', '''8426''', '''8426A''' – 6AU6 Pentode with a higher transconductance-to-anode-current ratio*'''8429''' = '''YL1120''' – 4 kW, 60 MHz Forced-air cooled, ceramic/metal, coaxial, linear power tetrode, 16 V/16.5 A heater*'''8431''' – 200 MHz Dual medium-μ triode, 12.6 V/180 mA heater, Noval base*'''8432''' – 1 kW Forced-air cooled ceramic/metal RF beam power pentode*'''8433/Z504S/ZM1070''' – 5 kHz Neon-filled Dekatron with 10 output cathodes, 13-pin base*'''8434''', '''8435''' – Half-wave Hydrogen rectifiers*'''8437''' – 10 kW, 500 MHz Forced-air cooled ''Cermolox'' ceramic/metal beam power tetrode, 8.5 V/88 A heater*'''8438/4-400A''' – 400 W, 110 MHz Radiation-cooled radial-beam power tetrode*'''8443''' – Display storage CRT*'''8444''' – Ruggedized, subminiature, frame-grid, sharp-cutoff VHF pentode, 6.3 V/125 mA heater, all-glass round cross-section envelope, circular 8-pin/wire-ends*'''8445''', '''8446''' (Different pinout) – Medium-μ triode + sharp-cutoff pentode, Noval base*'''8447''' – Dual diode + high-μ triode, center-tapped 12.6 V/190 mA resp. 6.3 V/380 mA heater, Noval base; premium version of 12BR7*'''8448''' – CRT cathode drive power pentode, Noval base; premium version of ''12BY7/EL180''*'''8453''' = '''Z550M''' = '''[[#ZM1050|{{color|Green|ZM1050}}]]''' – Neon-filled digital indicator tube, top-viewing, [[Dekatron]]-type readout with common anode and common cathode, pulsating anode voltage, controlled by 5-volts sensitive starter electrodes, for [[Wiktionary:transistorized|transistorized]] circuits*'''8454''' – Display storage CRT*'''8456''' – ''Nuvistor'' medium-μ triode for use in sonobuoys, customer-specified heater voltage between 6 and 8.5 V*'''8457''' – 200 MHz Dual medium-μ triode, center-tapped 12.6 V/380 mA resp. 6.3 V/760 mA heater, Noval base*'''8458''' – Dual RF power tetrode*'''8460''' – See 8294*'''8462''' – 100 W, 50 MHz Ceramic/metal beam power tetrode, 2.9 V/4.6 A heater, ''Elevenar'' 11-pin base*'''8463''' = '''YL1000''' – 12 W, 50 MHz Power pentode, 1.1 V/880 mA quickstart heater, Noval base*'''8464''' – Power triode for use in ''hard-tube pulser'' modulators*'''8467''' – 12.4-14.5 GHz Reflex Klystron*'''8468''' – Magnetron*'''8480''', '''8483''' – Vidicons*'''8488''' – Hydrogen triode thyratron*'''8489''' – Medium-μ triode + sharp-cutoff pentode, 6.3 V/450 mA heater, Noval base*'''8495''' – 160 kV Power triode for use (immersed in oil) in ''hard-tube pulser'' modulators*'''8501''' – 10 kW Forced-air cooled, ''Cermolox'' ceramic/metal UHF beam power tetrode, 4.5 V/125 A heater*'''8502''' – <span style="background: black;font: Arial;color: #FF4000"> ''0 1 2 3 4 5 6 7 8 9'' </span> Miniature Neon-filled digital indicator tube, {{cvt|0.31|in|mm|1}} character height, top-viewing*'''8503''' – Hydrogen triode thyratron*'''8507''', '''8507A''' – Vidicon*'''8517''' – Ruggedized, subminiature pentode, 6.3 V/150 mA heater, all-glass round cross-section envelope, circular 8-pin/wire-ends*'''8521''' – Vidicon*'''8522''' – 5636 Dual-control pentode with improved isolation resistance and lower microphonics*'''8524''' – Ruggedized, metal subminiature, shielded dual-control RF pentode, Silicon-free 6.3 V/150 mA heater*'''8528''' – Ruggedized, metal subminiature, shielded AF beam power tetrode, Silicon-free 6.3 V/450 mA heater*'''8529''' – Ruggedized, metal subminiature, shielded semiremote-cutoff RF pentode, Silicon-free 6.3 V/150 mA heater*'''8530''' – Ruggedized, metal subminiature, shielded sharp-cutoff RF pentode, Silicon-free 6.3 V/150 mA heater*'''8532/6J4-WA''' – High-μ triode, 6.3 V/400 mA heater, Miniature 7-pin base; premium version of 6J4*'''8533''' – 100 W, 3 GHz Forced-air cooled planar power triodes*'''8534''' (Conduction/convection cooled), '''8535''' (forced-air cooled) – 150 W, 2.5 GHz Ruggedized, ceramic/metal power triodes with a high-emission {{Tooltip|''Phormat''|Indirectly heated disc with an oxide coating impregnated in a Nickel matrix}} cathode<ref>[https://www.worldradiohistory.com/hd2/IDX-CATALOGS/IDX/Miscellaneous/Machlett-Cathode-Press-1964-3-OCR-Page-0054.pdf Machlett UHF planar triodes]</ref>*'''8536''' (Conduction/convection cooled), '''8537''' (forced-air cooled) – 150 W, 2.5 GHz Ruggedized, ceramic/metal planar power triodes, ''Phormat'' cathode; miniaturized variants of 7815/3CPN10A5 resp. 7855*'''8538''' (Conduction/convection cooled), '''8539''' (forced-air cooled) – 100 W, 3 GHz Ceramic/metal planar pulse-rated power triode, ''Phormat'' cathode; miniaturized variants of 8533*'''8541''', '''8541A''' – Vidicon*'''8543''' – Magnetron*'''8547''' – 175 kW, 30 MHz Water-cooled, pulse-rated power triode*'''8548''' – 180 kV Power triode for use (immersed in oil) in ''hard-tube pulser'' modulators*'''8552''' – See 6883B*'''8553''' – Ceramic/metal Hydrogen triode thyratron*'''8556/EC8010''' – Triode, Noval base*'''8560A''', '''8560AS''' – 500 MHz Conduction/convection cooled radial-beam power tetrode; similar to 7203/4CX250B*'''8561/4CX300Y''' – 400 W, 110 MHz Forced-air cooled, ceramic/metal power tetrode*'''8566''' – Vidicon*'''8567''' – Vidicon*'''8568''' – 21 MW<sub>peak</sub>, 2.856 GHz Pulse-rated 5-cavity Klystron, 15 V/14 A heater*'''8571''' – 9-Stage S4 photomultiplier*'''8572''', '''8572A''', '''8573''', '''8573A''' – 0.62" Vidicons*'''8574''' – TR cell*'''8575''' – 12-Stage S24 photomultiplier*'''8576''' = '''264''' – 3 kW, 30 MHz Forced-air cooled, ceramic/metal, linear radial-beam power pentode*'''8578''' – TR cell*'''8587''' – See 6952*'''8590/4CPX250K''' – 250 W, 500 MHz pulse-rated radial-beam power tetrode*'''8591''' = '''TBH6/14''' – Water helix-cooled RF power triode*'''8592''' = '''TBH7/8000''' – Water helix-cooled RF power triode*'''8593''' = '''TBH7/9000''' – Water helix-cooled RF power triode*'''8594''' = '''TBH12/38''' – Water helix-cooled RF power triode*'''8596''' – See 7457*'''8604''' – Vidicon*'''8605-1''' = '''8605/V1''' – Image intensifier*'''8605-2''' = '''8605/V2''' – Image intensifier*'''8605-3''' = '''8605/V2''' – Image intensifier*'''8606''' – Image intensifier*'''8608/EL5070''' – 10 W Power pentode, Magnoval base, for use as wideband video driver*'''8610''' = '''TBH6/6000''' – Water helix-cooled RF power triode*'''8612''' – 6 kV Corona voltage-regulator tube*'''8618''', '''8618V''' (With an [[Ion pump (physics)|ion getter pump]]) – 35 kW, 30 MHz Water-cooled, magnetically-beamed, power triode*'''8621/4CX250FG''' – See 7203/4CX250B*'''8627''' – 1.2 GHz ''Nuvistor'' power triode, 6.3 V/150 mA heater*'''8628''' – High-μ triode, 6.3 V/100 mA heater, Nuvistor base*'''8637''' – 2×44 W, 175 MHz Radiation-cooled, dual linear beam power tetrode, 13.5 V/800 mA heater, Magnoval base*'''8644''', '''8645''' – 10-Stage S20 photomultiplier*'''8646''' – 150 W, 500 MHz Forced-air cooled, ceramic/metal beam power tetrode, ''Elevenar'' 11-pin base*'''8660/4CX1500B''' – 1.5 kW, 30 MHz Forced-air cooled, ceramic/metal, linear radial-beam power tetrode*'''8661/4CW10000A''' – 10 kW, 30 MHz Liquid-cooled, ceramic/metal linear radial-beam power tetrode*'''8664''', '''8664/V1''' – 10-Stage S24 photomultiplier*'''8666''' = '''YD1170''' (Forced-air cooled), '''8668''' = '''YD1172''' (Water helix-cooled) – 10 kW, 120 MHz Power triode*'''8673''', '''8674''' – Image orthicons*'''8680''' = '''YD1212''' – 120 kW, 30 MHz Water jacket-cooled power triode*'''8684''' – Magnetron*'''8685''' – Image orthicon*'''8727''' – ''Pencil''-type ceramic/metal triode, 6.3 V/225 mA heater*'''8728''' = '''YD1150A''' (Forced-air cooled), '''8730''' = '''YD1152''' (water helix-cooled) – 2.5 kW, 85 MHz Power triodes*'''8731''' = '''YD1160''' (Forced-air cooled), '''8732''' = '''YD1161''' (Water jacket-cooled), '''8733''' = '''YD1162''' (Water helix-cooled) – 5 kW, 120 MHz Power triode*'''8734''' = '''YD1173''' – 10 kW, 50 MHz Forced-air cooled power triode*'''8735''' = '''YD1182''' – 20 kW, 100 MHz Water jacket-cooled power triode*'''8736''' = '''YD1192''' – 40 kW, 30 MHz Water jacket-cooled power triode*'''8741''' – 150 W, 3 GHz Ruggedized ceramic/metal planar pulse-rated power triode, ''Phormat'' cathode*'''8748''', '''8749''' – Image orthicon*'''8752''' = '''YD1202''' – 80 kW, 30 MHz Water jacket-cooled power triode*'''8755''', '''8755A''' (3 GHz), '''8757''' (3.5 GHz) – Ruggedized, contact/conduction-cooled, ceramic/metal, planar power triodes, 6.3 V/1.3 A heater*'''8765''' – Ceramic/metal Hydrogen triode thyratron*'''8772''' (Water-cooled, 60 kW), '''8773''' (disc-fin forced-air cooled, 35 kW) – Power triode for use in ''hard-tube pulser'' modulators*'''8775''' – Image orthicon*'''8785''' (Water/vapor-cooled), '''8786''' (Water-cooled) – 175 kW, 30 MHz Ceramic/metal power tetrodes*'''8791''', '''8791/V1''' – 1 kW, 400 MHz Ruggedized, forced-air cooled, ''Cermolox'' ceramic/metal linear beam power tetrode, 6.3 V/7.5 A heater*'''8792''', '''8792/V1''' – 1.5 kW, 400 MHz Sturdy, forced-air cooled, ''Cermolox'' ceramic/metal linear beam power tetrode, 5.5 V/17.3 A heater*'''8793''' – 1.5 kW, 400 MHz Forced-air cooled, ''Cermolox'' ceramic/metal beam power tetrode, 5.7 V/125 A heater*'''8794''' – 12.5 kW, 400 MHz Forced-air cooled, ''Cermolox'' ceramic/metal beam power tetrode, 5.7 V/125 A heater*'''8795''' (Water-cooled), '''8796''' (Water/vapor-cooled) – 140 kW, 30 MHz Low-loss [[Aluminium oxide|Alumina]] ceramic/metal power triode*'''8801''' = '''YD1180''' – 15 kW, 100 MHz Forced-air cooled power triode*'''8806''' (12.5 kW), '''8807''' (15 kW) – 400 MHz Forced-air cooled, linear beam power tetrode*'''8808''' – High-μ triode, 6.3 V/340 mA heater, Nuvistor base, for use as anode on top cap, grid tied to metal envelope*'''8809/4CX600J''', '''8921/4CX600JA''' (Larger anode cooler for high-altitude avionics service) – 600 W Forced-air cooled, ceramic/metal ultra-linear beam power tetrode*'''8811''' – 1.5 kW, 4.4-5 GHz 4-cavity gang-tuned Klystron, 6.5 V/7.6 A heater*'''8812''' = '''YL1420''' – 11 kW, 260 MHz Forced-air cooled, ceramic/metal, coaxial, linear VHF power tetrode, 6.3 V/120 A heater*'''8813''' = '''YL1430''' – 18 kW, 260 MHz Forced-air cooled, ceramic/metal, coaxial, linear VHF power tetrode, 8 V/120 A heater*'''8814''' = '''YL1440''' – 2.4 kW, 260 MHz Forced-air cooled, ceramic/metal, coaxial, linear VHF power tetrode, 4.2 V/53 A heater*'''8824''' (470-566 MHz), '''8825''' (566-698 MHz), '''8826''' (698-890 MHz) – Water/vapor-cooled UHF Klystrons for use in TV transmitters with a modulating anode for amplifying both the video and audio carriers with the same beam supply, in TV transmitters*'''8828''' – 200 W, 500 MHz Forced-air cooled power tetrode with a [[Beryllium oxide|Beryllia]] heat sink coupler, ''Elevenar'' 11-pin base*'''8846''' – 140 kW, 30 MHz Ruggedized, integral water jacket-cooled, ceramic/metal power triode*'''8847''', '''8847A''' (25% less heater power) – 150 W, 3.5 GHz Ruggedized contact/conduction cooled planar power triode*'''8850''', '''8851''' – 12-Stage S24 photomultipliers*'''8857/V1''', '''8857/V2''' – Image intensifier*'''8858''' – Image intensifier*'''8867''' = '''YD1352S''' – Neotron (=Field effect tube, magnetically beamed triode)*'''8873''' (Contact/conduction cooled, 200 W), '''8874/3CX400A7''' (transverse forced-air cooled, 400 W), '''8875''' (axial forced-air cooled, 300 W) – 500 MHz Ceramic/metal power triodes*'''8876''' – 250 W, 500 MHz Forced-air cooled, ceramic/metal radial-beam power tetrode*'''8890''' – 5 kW, 400 MHz Forced-air cooled, linear beam power tetrode*'''8891''' – 5 kW, 400 MHz Forced-air cooled beam power tetrode*'''8892''' – 50 W, 6 GHz Ruggedized, contact/conduction-cooled, ceramic/metal pulse-rated planar power triode, 6.3 V/650 mA heater*'''8893''' – 100 W, 4 GHz Ruggedized, contact/conduction-cooled, ceramic/metal pulse-rated planar power triode, 6.3 V/1.3 A heater*'''8904/4CX350FJ''' – See 8322/4CX250A*'''8906''' = '''Y572''' (Contact/conduction cooled), '''8906AL''' (''AirLine quality'' [[product binning|binned/selected]]), '''8907''' (forced-air cooled) – 100 W, 2.5 GHz Ruggedized ceramic/metal planar power triode*'''8909/4CX5000J''' – 6 kW, 100 MHz Forced-air cooled, ceramic/metal linear radial-beam power tetrode*'''8910/4CX15000J''' – 15 kW, 110 MHz Forced-air cooled, ceramic/metal, linear radial-beam power tetrode*'''8911''' = '''X2153''', '''8912''' = '''X2154''' – 6 GHz Ruggedized contact/conduction cooled, ceramic/metal planar power triodes*'''8913''' = '''YD1195''' – 30 kW, 100 MHz Forced-air cooled power triode*'''8915''' = '''YL1520''' – 25 kW, 260 MHz Forced-air cooled, ceramic/metal, coaxial, linear VHF power tetrode, 11.5 V/120 A heater*'''8918''' = '''YD1342''' – 530 kW, 30 MHz Water-cooled power triode*'''8921''' – See 8809/4CX600J*'''8930''' – See 7580-W/4CX250R*'''8933''' – 3 GHz Ruggedized contact/conduction cooled, ceramic/metal planar power triode*'''8935''' = '''YD1185''' – 15 kW, 100 MHz Forced-air cooled power triode*'''8936''' = '''YD1187''' – 20 kW, 100 MHz Water jacket-cooled power triode*'''8937''' = '''YD1197''' – 50 kW, 100 MHz Water jacket-cooled power triode*'''8938''' – 1.5 kW, 500 MHz Forced-air cooled, ceramic/metal linear power triode*'''8940''' – 2.5 GHz Contact/conduction cooled, ceramic/metal planar power triode*'''8941''' = Eimac '''Y690''' – 2 GHz Contact/conduction cooled, ceramic/metal planar power triode*'''8950''' – 33 W ''Compactron'' RF Beam power pentode, 13 V/1.1 A heater*'''8952''' = '''YD1175''' – 10 kW, 120 MHz Forced-air cooled power triode*'''8954''' – 600 W Contact/conduction-cooled, pulse-rated power tetrode*'''8957/4CX250BC''' – Long-life, tighter specs version of 7203/4CX250B*'''8958''' = '''YD1177''' – 15 kW, 120 MHz Water helix-cooled power triode*'''8959''' – 100 kW, 108 MHz Water-cooled, ceramic/metal power tetrode*'''8973''' – 650 kW Water-cooled, ceramic/metal power tetrode*'''8989/4CX12000A''' – 12 kW, 220 MHz Forced-air cooled, ceramic/metal power tetrode*'''8990/4CX20000A''', '''8990A''' – 20 kW, 110 MHz Forced-air cooled, ceramic/metal power tetrode*'''2AS2''', '''2AH2/2AS2A/2BU2''' – ''Compactron'' CRT EHT rectifier, 2.5 V/330 mA heater*'''2AV2''' – Directly heated CRT focus HV rectifier, 1.8 V/225 mA heater, Noval base*'''3DA3''' – CRT EHT rectifier, 3.15 V/480 mA heater, Octal base*'''3DB3/3CY3''' – CRT EHT rectifier, 3.15 V/245 mA heater, Octal base*'''3DC3''' – CRT EHT rectifier, 3.15 V/280 mA heater, Octal base; upgraded 3CU3A*'''3DG4''' – Indirectly heated full-wave rectifier, 3.3 V/3.8 A heater, 5-pin Octal base*'''3DH3''' – CRT EHT rectifier, 3.15 V/480 mA heater, Octal base*'''5AU4''' – Full-wave rectifier, 5 V/3.75 A heater, Octal base*'''5AW4''' – Full-wave rectifier, 5 V/3.7 A heater, 5-pin Octal base*'''5AX4GT''' – Full-wave rectifier, 5 V/2.5 A heater, Octal base*'''5AZ4''' – Full-wave rectifier, 5 V/2 A heater, Loctal base*'''5BC3''', '''5BC3A''' – Directly heated full-wave rectifier, 5 V/3 A heater, Novar base*'''5CU4''' – Indirectly heated full-wave rectifier, 5.0 V/3.5 A heater, 5-pin Octal base*'''5DJ4''' – Indirectly heated full-wave rectifier, 5 V/3 A heater, Octal base*'''6A3''' – AF Power triode, 6.3 V/1 A heater, UX4 base*'''6A4''', '''6A4LA''' – Directly heated power pentode, 6.3 V/300 mA filament with suppressor grid internally tied to a center-tap, UY5 base*'''6A5-G''' – Power triode, 6.3 V/1 A heater with cathode internally tied to a center-tap, Octal base*'''6AB6-G''' – ''Triple-Twin'' AF signal + ''zero bias'' power triode internally connected as a cathode follower*'''6AB7/1853''' – Semiremote-cutoff RF/IF pentode, 6.3 V/450 mA heater, Octal base*'''6AB8/ECL80''' – Triode + power pentode, Noval base*'''6AB9''' – Dual VHF tetrode, 6.3 V/365 mA heater, Decal base*'''6AC9''' – ''Compactron'' Dual diode + pentode, 6.3 V/600 mA heater, for use as IF amplifier and phase detector*'''6AD4''' (''5898'') – Subminiature high-μ triode, all-glass round cross-section envelope, circular 8-pin/wire-ends*'''6AD5-G''' – High-μ triode, 6.3 V/300 mA heater, Octal base, for use as driver for electrostatic CRT deflection plates*'''6AD7-G''' – Triode + power pentode, 6.3 V/850 mA heater, Octal base*'''6AD8/EBF81''' – Common cathode dual diode + remote-cutoff RF/IF/AF pentode, Noval base*'''6AD10''', '''6AD10A''' – ''Compactron'' Dual-control pentode + power pentode, 6.3 V/1.05 A heater, used as FM audio [[Detector (radio)#Quadrature detector|Quadrature demodulator]] and power stage; similar to 6J10/6Z10; precursor of the [[Nonode]] approach*'''6AE5-G''', '''6AE5-GT''' – Low-μ triode, 6.3 V/300 mA heater, 6-pin Octal base*'''6AE8''' – Triode/hexode oscillator/mixer, Noval base*'''6AF3''' – CRT horizontal deflection output booster/damper/efficiency diode, 6.3 V/1.2 A heater, Noval base with cathode on top cap*'''6AF5-G''' – Triode, 6.3 V/300 mA heater, 6-pin Octal base*'''6AF7-G''' – Dual-sensitivity, top-view, "Magic Eye"-type tuning indicator*'''6AF9''' – Dual dissimilar pentode, 6.3 V/850 mA heater, Decal base, for use as CRT cathode driver and sound IF, AGC amplifier, sync separator*'''6AG6-G''' – Sharp-cutoff power pentode, 6.3 V/1.2 A heater, Octal base*'''6AG7/6AK7''' – Power pentode, 6.3 V/650 mA heater, Octal base, for use as CRT cathode driver*'''6AG9''' – ''Compactron'' Medium-μ triode + frame-grid pentode, 6.3 V/820 mA heater, for use as AGC amplifier and video amplifier in color TV*'''6AH4-GT''' – Medium-μ triode, 6.3 V/750 mA heater, 6-pin Octal base*'''6AH7-GT''' – Dual triode, Octal base*'''6AH9''' – ''Compactron'' Medium-μ triode + sharp-cutoff frame-grid pentode, 6.3 V/900 mA heater, for use as video amplifier and color blanker in color TV receivers*'''6AJ4/EC84''' – High-μ triode, Noval base*'''6AJ7''' – Pentode, Octal base*'''6AJ8/ECH81''' – Triode/remote-cutoff heptode oscillator/mixer, 6.3 V/300 mA heater, Noval base*'''6AK7''' – See 6AG7*'''6AL9''' – ''Compactron'' High-μ triode + sharp-cutoff pentode, 6.3 V/820 mA heater*'''6AL11''' – ''Compactron'' Beam power pentode + sharp-cutoff pentode, 6.3 V/900 mA heater, for use as FM demodulator and AF output amplifier*'''6AM4''' – High-μ UHF triode, 6.3 V/225 mA heater, Noval base, for use as grounded-grid amplifier*'''6AM5/EL91''' – Power pentode, 6.3 V/200 mA heater, Miniature 7-pin base*'''6AM8''', '''6AM8A''' – Diode + sharp-cutoff pentode, 6.3 V/450 mA heater, Noval base, for use as video detector and IF amplifier*'''6AN4''' – High-μ triode, 6.3 V/225 mA heater, Miniature 7-pin base, for use as UHF mixer or amplifier*'''6AN6''' – Common cathode quad diode, 6.3 V/200 mA heater, Miniature 7-pin base*'''6AQ4/EC91''' – 250 MHz VHF triode, Miniature 7-pin base*'''6AQ6''' – Dual diode + high-μ AF triode, 6.3 V/150 mA heater, Miniature 7-pin base*'''6AQ7-GT''' – Dual diode + high-μ triode, 6.3 V/300 mA heater, Octal base*'''6AR5''' – Power pentode, 6.3 V/400 mA heater, Miniature 7-pin base*'''6AR7-GT''' – Dual diode + remote-cutoff pentode, 6.3 V/300 mA heater, Octal base*'''6AR11''' – ''Compactron'' Semiremote-cutoff dual IF pentode, 6.3 V/800 mA heater*'''6AS5''' – AF Beam power pentode, 6.3 V/800 mA heater, Miniature 7-pin base*'''6AS8''' – High-[[perveance]] diode + sharp-cutoff pentode, 6.3 V/450 mA heater, Noval base, for use as audio/video detector or [[Clamper (electronics)|DC restorer]] and IF/ video/AGC amplifier*'''6AT8''', '''6AT8A''' – Medium-μ triode + sharp-cutoff pentode, 6.3 V/450 mA heater, Noval base, for use as VHF oscillator/mixer*'''6AU5-GT''' – Beam power tetrode, 6.3 V/1.25 A heater, 6-pin Octal base*'''6AU8''', '''6AU8A''' – Medium-μ triode + sharp-cutoff pentode, 6.3 V/600 mA heater, Noval base, for use as sync separator and video amplifier*'''6AV4/EZ91''' – Full-wave rectifier, Miniature 7-pin base*'''6AV5-GA''', '''6AV5-GT''' – Beam power pentode, 6.3 V/1.2 A heater, Octal base, for use as horizontal deflection amplifier*'''6AW7-GT''' – Dual diode + triode*'''6AW8''', '''6AW8A''' – High-μ triode + sharp-cutoff pentode, 6.3 V/600 mA heater, Noval base, for use as sync separator and video amplifier*'''6AX3''' – ''Compactron'' CRT horizontal deflection output booster/damper/efficiency diode, 6.3 V/1.2 A heater*'''6AX6-G''' – Dual rectifier with separate cathodes, 6.3 V/2.5 A heater, 7-pin Octal base*'''6AX8''' – Medium-μ triode + sharp-cutoff pentode, 6.3 V/450 mA heater, Noval base, for use as sync separator and video amplifier*'''6AY3''', '''6AY3A''', '''6AY3B''' – CRT horizontal deflection output booster/damper/efficiency diode, 6.3 V/1.2 A heater, Novar base*'''6AY11''' – Dual diode + dual high-μ triode, 6.3 V/690 mA heater, Compactron base, for use as FM demodulator and AF amplifier*'''6AZ6''' – Subminiature, ruggedized, dual UHF diode with separate cathodes, all-glass round cross-section envelope, circular 8-pin/wire-ends*'''6AZ8''' – Medium-μ triode + sharp-cutoff pentode, 6.3 V/450 mA heater, Noval base, for use as sync separator/[[Clipper (electronics)|clipper]] and IF/video/AGC amplifier*'''6B3''' – CRT horizontal deflection output booster/damper/efficiency diode, Noval base with cathode on top cap*'''6B4-G''' – Power triode, 6.3 V/1.0 A heater, Octal base*'''6B10''' – ''Compactron'' Dual diode + medium-μ dual triode, 6.3 V/600 mA heater, for use as horizontal phase detector and horizontal oscillator*'''6BA3''' – CRT horizontal deflection output booster/damper/efficiency diode, 6.3 V/1.2 A heater, Novar base*'''6BA4''' – ''Rocket''-type, coaxial, disk-seal UHF planar triode, 6.3 V/375-425 mA heater*'''6BA8''', '''6BA8A''' – Medium-μ triode + sharp-cutoff pentode, 6.3 V/600 mA heater, Noval base, for use as sync separator/[[Clipper (electronics)|clipper]] and video amplifier*'''6BC4''' – Medium-μ RF triode, 6.3 V/225 mA heater, Noval base*'''6BC8''' – Dual semiremote-cutoff VHF triode, 6.3 V/400 mA heater, Noval base, for use as [[cascode]] amplifier*'''6BD4''', '''6BD4A''' – Beam power triode, 6.3 V/500 mA heater, 6-pin Octal base, for use as HV shunt regulator in color TV receivers*'''6BD5-GT''' – Beam power pentode, 6.3 V/900 mA heater, 6-pin Octal base, for use as horizontal deflection amplifier*'''6BD6''' – Remote-cutoff RF/IF pentode, 6.3 V/300 mA heater, Miniature 7-pin base*'''6BD7/EBC80''' – Shielded dual diode + AF triode, Noval base*'''6BE3/6BZ3''', '''6BE3A''' – ''Compactron'' CRT horizontal deflection output booster/damper/efficiency diode, 6.3 V/1.2 A heater*'''6BE7/EQ80''' – Nonode for FM quadrature detection*'''6BE8''', '''6BE8A''' – Medium-μ triode + sharp-cutoff pentode, 6.3 V/450 mA heater, Noval base*'''6BF5''' – Beam power tetrode, 6.3 V/1.2 A heater, Miniature 7-pin base*'''6BF11''' – ''Compactron'' Beam power pentode + sharp-cutoff pentode, 6.3 V/1.2 A heater, for use as audio power amplifier and FM demodulator*'''6BG7''' – Subminiature dual triode, all-glass envelope, 8-pin/wire-ends*'''6BH3''', '''6BH3A''' – CRT horizontal deflection output booster/damper/efficiency diode, 6.3 V/1.6 A heater, Novar base*'''6BH5/EF81''' – Remote-cutoff RF/IF/video pentode, Noval base*'''6BH6''' – Sharp-cutoff RF pentode, 6.3 V/150 mA heater, Miniature 7-pin base*'''6BH8''' – Medium-μ triode + sharp-cutoff pentode, 6.3 V/600 mA heater, Noval base, for use as sync separator/[[Clipper (electronics)|clipper]]/amplifier or sweep oscillator and video amplifier*'''6BJ3''' – ''Compactron'' CRT horizontal deflection output booster/damper/efficiency diode, 6.3 V/1.2 A heater*'''6BJ5''' – Power pentode, 6.3 V/200 mA heater, Miniature 7-pin base*'''6BJ6''', '''6BJ6A''' – Remote-cutoff RF/IF pentode, 6.3 V/150 mA heater, Miniature 7-pin base*'''6BJ7''' – Triple diode, 6.3 V/450 mA heater, Noval base, for use as DC restorer in color TV*'''6BJ8''' – Dual diode + medium-μ triode, 6.3 V/600 mA heater, Noval base, for use as phase splitter/comparator and vertical deflection amplifier*'''6BK5''' – Beam power pentode, 6.3 V/1.2 A heater, Noval base*'''6BK6''' – Common cathode dual diode + triode, 6.3 V/300 mA heater, Miniature 7-pin base*'''6BL4''' – CRT horizontal deflection output booster/damper/efficiency diode, 6.3 V/3 A heater, Octal base*'''6BL7-GT''', '''6BL7-GTA''' – Dual triode, 6.3 V/1.5 A heater, Octal base, for use as vertical deflection oscillator and amplifier*'''6BM5/6P9''' – AF power pentode, Miniature 7-pin base*'''6BN4''', '''6BN4A''' – Medium-μ VHF triode, 6.3 V/200 mA heater, Miniature 7-pin base*'''6BN5/EL85''' – RF/AF power pentode, Noval base*'''6BN7''' – Dual triode, 6.3 V/750 mA heater, Noval base, for use as vertical deflection oscillator and amplifier*'''6BN8''' – Dual diode + high-μ triode, 6.3 V/600 mA heater, Noval base, for use as phase/ratio discriminator, AF/[[Burst phase|burst]] amplifier or oscillator*'''6BN11''' – ''Compactron'' Dual sharp-cutoff IF pentode, 6.3 V/800 mA heater*'''6BR3''' = '''6RK19''' – CRT horizontal deflection output booster/damper/efficiency diode*'''6BR5/EM80''' – Side-view, fan-type tuning indicator, Noval base*'''6BR8/6FV8''', '''6BR8A/6FV8A''' – Medium-μ triode + sharp-cutoff pentode, 6.3 V/450 mA heater, Noval base, for use as vertical deflection oscillator and IF amplifier*'''6BS3''', '''6BS3A''' – CRT horizontal deflection output booster/damper/efficiency diode, 6.3 V/1.2 A heater, Novar base*'''6BS5''' – Beam power tetrode, Noval base, for use as AF, video, or vertical deflection amplifier*'''6BS7''' – Pentode, 6.3 V/150 mA heater, Noval base*'''6BS8''' – Medium-μ dual triode, 6.3 V/400 mA heater, Noval base, for use as VHF [[cascode]] amplifier*'''6BT4/EZ40''' – Full-wave rectifier, Rimlock base*'''6BT6''' – Dual diode + high-μ triode, 6.3 V/300 mA heater, Miniature 7-pin base*'''6BT8''' – Dual diode + sharp-cutoff pentode, 6.3 V/450 mA heater, Noval base, for use as AFC or detector and IF/video/AGC amplifier*'''6BU4''' – Beam power triode, Octal base, for use as HV shunt regulator in color TV receivers*'''6BU5''' – Beam power pentode, 6.3 V/150 mA heater, Octal base, for use as HV shunt regulator in color TV receivers*'''6BU6''' – Dual diode + triode, 6.3 V/300 mA heater, Miniature 7-pin base*'''6BV7''' – Dual diode + power pentode, 6.3 V/800 mA heater, Noval base*'''6BV8''' – Dual diode + triode, 6.3 V/600 mA heater, Noval base*'''6BV11''' – ''Compactron'' Dual sharp-cutoff dual-dontrol pentode, 6.3 V/900 mA heater, for use as color demodulator*'''6BW3/6CG3/6DQ3''' – ''Compactron'' CRT horizontal deflection output booster/damper/efficiency diode, 6.3 V/1.6 A heater*'''6BW4''' – Full-wave rectifier, 6.3 V/900 mA heater, Noval base*'''6BW6''' – Beam power tetrode, 6.3 V/450 mA heater, Noval base*'''6BW7''' – RF Pentode, 6.3 V/300 mA heater, Noval base*'''6BW8''' – Dual diode + sharp-cutoff pentode, 6.3 V/450 mA heater, Noval base*'''6BW11''' – ''Compactron'' Dual dissimilar pentode, 6.3 V/800 mA heater, for use as video amplifier*'''6BX4''' – See 6X4*'''6BX7-GT''' – Dual triode, 6.3 V/1.5 A heater, Octal base, for use as vertical deflection oscillator and amplifier*'''6BX8''' – Dual VHF triode, 6.3 V/400 mA heater, Noval base, for use as [[cascode]] amplifier*'''6BY4''' – Ceramic, coaxial, disk-seal UHF planar triode*'''6BY5-G''', '''6BY5-GA''' – CRT horizontal deflection output booster/damper/efficiency diode, 6.3 V/1.6 A heater, 7-pin Octal base*'''6BY8''' – High perveance diode + sharp-cutoff pentode, 6.3 V/600 mA heater, Noval base, for use as [[Clipper (electronics)|limiter]] or detector and RF/IF amplifier*'''6BY11''' – ''Compactron'' Power pentode + dual-control pentode, 6.3 V/1.2 A heater, for use as audio output amplifier and FM demodulator*'''6BZ3''' – See 6BE3*'''6BZ8''' – Dual medium-μ VHF triode, 6.3 V/400 mA heater, Noval base*'''6C5''', '''6C5-G''', '''6C5-GT''' – Triode, 6.3 V/300 mA heater, 6-pin Octal base*'''6C8-G''' – Dual triode, 6.3 V/300 mA heater, Octal base with control grid on top cap*'''6C9''' – VHF Dual tetrode, 6.3 V/400 mA heater, B10G Decar base (=Noval plus center pin)*'''6CB5''', '''6CB5A''' – Beam power pentode, 6.3 V/2.5 A heater, Octal base, for use as horizontal deflection amplifier*'''6CD3/6CE3''' – ''Compactron'' CRT horizontal deflection output booster/damper/efficiency diode, 6.3 V/2.5 A heater*'''6CD6-G''', '''6CD6-GA''' – Beam power pentode, 6.3 V/2.5 A heater, Octal base, for use as horizontal deflection amplifier*'''6CD7/EM34''' – Dual-sensitivity, top-view, "Magic Eye"-type tuning indicator, Octal base [[File:Commons-logo.svg|16x16px|link=:Commons:Category:EM34 (vacuum tube)|class=noviewer|alt=]]*'''6CF6''' – Sharp-cutoff IF pentode, 6.3 V/300 mA heater, Miniature 7-pin base*'''6CF8''' – See 6BK8*'''6CG3''' – See 6BW3*'''6CG6''' – Remote-cutoff pentode, Miniature 7-pin base*'''6CG8''', '''6CG8A''' – Medium-μ triode + sharp-cutoff pentode, 6.3 V/450 mA heater, Noval base, for use as VHF oscillator/mixer*'''6CH3/6CJ3''' – CRT horizontal deflection output booster/damper/efficiency diode, 6.3 V/1.8 A heater, Novar base*'''6CH7''' – Medium-μ dual RF triode, 6.3 V/400 mA heater, Noval base, for use as [[cascode]] amplifier*'''6CH8''' – Medium-μ triode + sharp-cutoff pentode, 6.3 V/450 mA heater, Noval base*'''6CJ3''' – See 6CH3*'''6CK3''' – CRT horizontal deflection output booster/damper/efficiency diode, 6.3 V/1.2 A heater, Novar base*'''6CK4''' – Low-μ triode, 6.3 V/1.25 A heater, 6-pin Octal base, for use as vertical deflection amplifier*'''6CK5/EL41''' – AF Power pentode, Rimlock base*'''6CK6/EL83''' – CRT cathode drive power pentode, Noval base*'''6CL3''' – CRT horizontal deflection output booster/damper/efficiency diode, 6.3 V/1.2 A heater, Novar base*'''6CL8''', '''6CL8A''' – Medium-μ triode + sharp-cutoff VHF tetrode, 6.3 V/450 mA heater, Noval base, for use as oscillator/mixer*'''6CM3''' – CRT horizontal deflection output booster/damper/efficiency diode, 6.3 V/2.4 A heater, Novar base*'''6CM4/EC86''' – UHF triode, Noval base; 4CM4/PC86 with a different heater*'''6CM6''' – Beam power pentode, 6.3 V/450 mA heater, Noval base, for use as audio power amplifier or vertical deflection amplifier*'''6CM7''' – Dual dissimilar triode, 6.3 V/600 mA heater, Noval base, for use as vertical deflection oscillator and amplifier*'''6CM8''' – High-μ triode + sharp-cutoff pentode, 6.3 V/450 mA heater, Noval base*'''6CN6/EL38''' – Power pentode, Octal base, for use as horizontal deflection amplifier*'''6CQ4/6DE4''' – CRT horizontal deflection output booster/damper/efficiency diode, 6.3 V/1.6 A heater, Octal base*'''6CQ6/EF92''' (''6CQ6S'') – Remote-cutoff RF pentode, Miniature 7-pin base*'''6CQ8''' – Medium-μ triode + sharp-cutoff tetrode, 6.3 V/450 mA heater, Noval base, for use as VHF oscillator/mixer*'''6CR4''' – [[Valve RF amplifier#Grounded grid amplifier|grounded-grid]] UHF triode, Noval base, used as [[cascode]] amplifier*'''6CR5''' – Beam power tetrode for use as horizontal deflection amplifier*'''6CR6''' – Diode + remote-cutoff pentode, 6.3 V/300 mA heater, Miniature 7-pin base*'''6CS5''' – AF Beam power pentode, 6.3 V/1.2 A heater, Noval base*'''6CS6/EH90''' – Dual-control heptode, 6.3 V/300 mA heater, Miniature 7-pin base, for use as gated amplifier or sync separator and [[Clipper (electronics)|clipper]]*'''6CR8''', '''6CS8''' (Different pinout) – Triode + IF pentode, 6.3 V/450 mA heater, Noval base*'''6CT3''' – CRT horizontal deflection output booster/damper/efficiency diode, 6.3 V/1.2 A heater, Noval base*'''6CT7/EAF42''' – Diode + remote-cutoff RF/IF/AF pentode, Rimlock base*'''6CU5''' – AF Beam power pentode, 6.3 V/1.2 A heater, Miniature 7-pin base*'''6CU7/ECH42''' – Triode/remote-cutoff hexode oscillator/mixer*'''6CU8''' – Medium-μ triode + sharp-cutoff pentode, 6.3 V/450 mA heater, Noval base, for use as IF/video/AGC amplifier and oscillator/sync separator or clipper*'''6CV7/EBC41''' – Shielded common cathode dual diode + AF triode*'''6CW5/EL86''' – AF Beam power pentode, 6.3 V/760 mA heater, Noval base*'''6CX7''' – Medium-μ dual triode, 6.3 V/400 mA heater, Noval base*'''6CX8''' – Medium-μ triode + sharp-cutoff pentode, 6.3 V/750 mA heater, Noval base, for use as sweep oscillator or amplifier and video amplifier*'''6CY5/7717''' (''6CY5/CATV'') – Sharp-cutoff VHF tetrode, 6.3 V/200 mA heater, Miniature 7-pin base*'''6CY7''' – Dual dissimilar triode, 6.3 V/750 mA heater, Noval base, for use as vertical deflection oscillator and amplifier*'''6DA4/6DM4''', '''6DA4A/6DM4A''' – CRT horizontal deflection output booster/damper/efficiency diode, 6.3 V/1.2 A heater, 5-pin Octal base*'''6DA5/EM81''' – Tuning indicator, 6BR5/EM80 with 25% greater sensitivity*'''6DA7''' – Dual dissimilar triode, 6.3 V/1.0 A heater, Noval base, for use as vertical deflection oscillator and amplifier*'''6DB5''' – Beam power tetrode, 6.3 V/1.2 A heater, Noval base*'''6DC6''' – Semiremote-cutoff pentode, 6.3 V/300 mA heater, Miniature 7-pin base*'''6DC8/EBF89''' – Common cathode dual diode + semiremote-cutoff RF/IF pentode, Noval base*'''6DE4''' – See 6CQ4*'''6DE6''' – Sharp-cutoff IF pentode, 6.3 V/300 mA heater, Miniature 7-pin base*'''6DE7''' – Dual dissimilar triode, 6.3 V/900 mA heater, Noval base, for use as vertical deflection oscillator and amplifier*'''6DG6-GT''' – AF Beam power pentode, 6.3 V/1.2 A heater, Octal base*'''6DG7''' – Remote-cutoff RF/IF pentode, Noval base*'''6DH7/6FG6/EM84''' = '''6Е3П'''↦'''6Ye3P''' – Side-view, band-type tuning/level indicator, Noval base [[File:Commons-logo.svg|16x16px|link=:Commons:Category:EM84 (vacuum tube)|class=noviewer|alt=]]*'''6DK3''' – CRT horizontal deflection output booster/damper/efficiency diode, 6.3 V/1.8 A heater, Novar base*'''6DK6''' – Sharp-cutoff IF pentode, 6.3 V/300 mA heater, Miniature 7-pin base*'''6DL3''' – CRT horizontal deflection output booster/damper/efficiency diode, 6.3 V/2.3 A heater, Novar base*'''6DL5/EL95''' – AF Beam power pentode, 6.3 V/200 mA heater, Miniature 7-pin base*'''6DL7''' – Tuning indicator*'''6DM4''', '''6DM4A''' – See 6DA4*'''6DN3''' – CRT horizontal deflection output booster/damper/efficiency diode, 6.3 V/2.4 A heater, Novar base*'''6DN6''' – Beam power amplifier, 6.3 V/2.5 A heater, 6-pin Octal base, for use as horizontal deflection amplifier*'''6DN7''' – Dual dissimilar triode, 6.3 V/900 mA heater, Octal base, for use as vertical deflection oscillator and amplifier*'''6DQ3''' – See 6BW3*'''6DQ4''' – CRT horizontal deflection output booster/damper/efficiency diode, 6.3 V/1.2 A heater, 5-pin Octal base*'''6DQ5''' – Beam power pentode, 6.3 V/2.5 A heater, Octal base, for use as horizontal deflection amplifier*'''6DR4''' – High-μ triode, 6.3 V/150 mA heater, Miniature 7-pin base; similar to one section of 12AX7*'''6DR6''' – Power pentode, Noval base*'''6DR7''' – Dual dissimilar triode, 6.3 V/900 mA heater, Noval base, for use as vertical deflection oscillator and amplifier*'''6DS5''' – AF Beam power pentode, 6.3 V/800 mA heater, Miniature 7-pin base*'''6DT3''' – ''Compactron'' CRT horizontal deflection output booster/damper/efficiency diode, 6.3 V/2.4 A heater*'''6DT4''' – CRT horizontal deflection output booster/damper/efficiency diode, 6.3 V/1.2 A heater, 6-pin Octal base*'''6DT5''' – Beam power tetrode, Noval base, for use as vertical deflection amplifier; 12DT5 or 25DT5 with a 6.3 V/1.2 A heater*'''6DT8''' – High-μ dual triode, 6.3 V/300 mA heater, Noval base, for use as RF amplifier or oscillator/mixer*'''6DU3''' – ''Compactron'' CRT horizontal deflection output booster/damper/efficiency diode, 6.3 V/2.1 A heater*'''6DW4''', '''6DW4A''', '''6DW4B''' – CRT horizontal deflection output booster/damper/efficiency diode, 6.3 V/1.2 A heater, Novar base*'''6DW5''' – Pentode, 6.3 V/1.2 A heater, Noval base, for use as vertical deflection amplifier*'''6DX4''' – UHF triode, Miniature 7-pin base*'''6DY4''', '''6DY4A''' – UHF frame-grid triode, Miniature 7-pin base*'''6DY5/EL82''' – Power pentode for use as AF or vertical deflection amplifier, Noval base*'''6DY7''' – Dual AF beam power pentode, 6.3 V/1.2 A heater, Octal base*'''6DZ4''' – See 6AF4*'''6DZ7''' – Dual AF power pentode, 6.3 V/1.52 A heater, Octal base*'''6DZ8''' – High-μ AF triode + AF power pentode, 6.3 V/900 mA heater, Noval base*'''6E6''' – Dual power triode, 6.3 V/600 mA heater, U7A base, for use in car radios*'''6E8-G''' – Triode/hexode oscillator/mixer, Octal base with hexode control grid #1 on top cap*'''6EA4''' – ''Compactron'' Beam power triode, 6.3 V/200 mA heater, for use as HV shunt regulator in color TV receivers*'''6EA5''' – Sharp-cutoff tetrode, 6.3 V/200 mA heater, Miniature 7-pin base*'''6EA7''' (6EM7) – Dual dissimilar triode, 6.3 V/1.05 A heater, Octal base*'''6EA8''' – Medium-μ triode + sharp-cutoff pentode, 6.3 V/450 mA heater, Noval base, for use as VHF oscillator/mixer*'''6EB5''' – Dual diode, 6.3 V/300 mA heater, Miniature 7-pin base*'''6EB8/6GN8''' – High-μ triode + sharp-cutoff pentode, 6.3 V/750 mA heater, Noval base, for use as sync separator or DC voltage amplifier and video amplifier*'''6EC4/EY500''' – CRT horizontal deflection output booster/damper/efficiency diode for color TV, 6.3 V/2.1 A heater, Magnoval base with cathode on top cap, guardian shield between filament and cathode to improve high voltage properties; 42EC4/PY500 with a different heater:*'''6EC4A/EY500A''' – 6EC4/EY500 without the guardian shield because of an improved filament/cathode insulation*'''6EC7''' – Remote-cutoff RF pentode, 6.3 V/200 mA heater, Noval base*'''6EF4''' – ''Compactron'' Beam power triode, 6.3 V/200 mA heater, for use as HV shunt regulator in color TV receivers*'''6EF6''' – ''Compactron'' Beam power pentode, 6.3 V/200 mA heater, for use as vertical deflection amplifier*'''6EH4A''' – ''Compactron'' Beam power triode, for use as HV shunt regulator in color TV receivers*'''6EH5''' – AF Beam power pentode, 6.3 V/1.2 A heater, Miniature 7-pin base*'''6EH7/EF183''' – Frame-grid, remote-cutoff IF pentode, 6.3 V/300 mA heater, Noval base*'''6EH8''' – Triode + sharp-cutoff pentode, 6.3 V/450 mA heater, Noval base, for use as VHF oscillator/mixer*'''6EJ4A''' – ''Compactron'' Beam power triode, 6.3 V/200 mA heater, for use as HV shunt regulator in color TV receivers*'''6EJ7/EF184''' – Frame-grid, sharp-cutoff IF pentode, 6.3 V/300 mA heater, Noval base*'''6EL4A''' – See 6BK4C*'''6EL7''' = EdiSwan '''6F23''' – Shielded RF pentode, 6.3 V/300 mA heater, Noval base*'''6EM7''' (6EA7) – Dual dissimilar triode, 6.3 V/925 mA heater, Octal base, for use as vertical deflection oscillator and amplifier*'''6EN4''' – Beam power triode, 6.3 V/200 mA heater, Octal base, for use as HV shunt regulator in color TV receivers*'''6EQ7''' – Diode + sharp-cutoff IF pentode, 6.3 V/300 mA heater, Noval base*'''6ER5/EC95''' – Vari-μ VHF triode, Miniature 7-pin base; 2ER5/XC95 or 4ER5/PC95 with a different heater*'''6ES5''' – High-μ VHF triode, 6.3 V/200 mA heater, Miniature 7-pin base*'''6ET6/EF98''' – Low (6.3-50 V) anode voltage, sharp-cutoff pentode, for use as oscillator or IF/AF amplifier in vehicle equipment, Miniature 7-pin base*'''6ET7''' – Dual diode + sharp-cutoff pentode, 6.3 V/750 mA heater, Noval base, for use as horizontal phase detector and video amplifier*'''6EU7''' – High-μ dual triode, 6.3 V/300 mA heater, Noval base, for use as AF amplifier or phase inverter*'''6EU8''' – Medium-μ triode + sharp-cutoff pentode, 6.3 V/450 mA heater, Noval base, for use as oscillator/mixer*'''6EV5''' – Sharp-cutoff VHF tetrode, 6.3 V/200 mA heater, Miniature 7-pin base*'''6EV7''' – Dual triode, 6.3 V/600 mA heater, Noval base*'''6EW6''' – Sharp-cutoff IF pentode, 6.3 V/400 mA heater, Miniature 7-pin base*'''6EW7''' – Dual dissimilar triode, 6.3 V/900 mA heater, Noval base, for use as vertical deflection oscillator and amplifier*'''6EX6''' – Beam power tetrode, 6.3 V/2.25 A heater, 6-pin Octal base, for use as horizontal deflection amplifier*'''6EY6''' – Beam power pentode, 6.3 V/680 mA heater, 6-pin Octal base, for use as vertical deflection amplifier*'''6EZ5''' – Beam power pentode, 6.3 V/800 mA heater, Octal base, for use as vertical deflection amplifier*'''6FC7/ECC89''' – Dual triode, Noval base, 6.3 V/340 mA heater, Noval base, for use as RF [[cascode]] amplifier in TV tuners and VHF receiver front ends, or as general-purpose [[instrumentation]] amplifier*'''6FD7''' – Dual dissimilar triode, 6.3 V/925 mA heater, Noval base, for use as vertical deflection oscillator and amplifier*'''6FG5''' – VHF Beam power pentode, 6.3 V/200 mA heater, Miniature 7-pin base*'''6FG6''' – See 6DH7*'''6FG7''' – Medium-μ triode + semiremote-cutoff pentode, 6.3 V/450 mA heater, Noval base, for use as VHF oscillator/mixer*'''6FH5''' – High-μ VHF triode, 6.3 V/200 mA heater, Miniature 7-pin base*'''6FH6''' – Beam power pentode, 6.3 V/1.2 A heater, 7-pin Octal base, for use as horizontal deflection amplifier*'''6FJ7''' – ''Compactron'' Dual dissimilar triode, 6.3 V/900 mA heater, for use as vertical deflection oscillator and amplifier*'''6FM7''' – ''Compactron'' Dual dissimilar triode, 6.3 V/1.05 A heater, for use as vertical deflection oscillator and amplifier*'''6FM8''' – Dual diode + high-μ triode, 6.3 V/450 mA heater, Noval base, for use as FM demodulator and AF amplifier*'''6FN5/EL300''' – CRT horizontal deflection power pentode, Octal base; 35FN5/PL300 with a different heater*'''6FQ5''', '''6FQ5A/6GK5''' – VHF triode, 6.3 V/180 mA heater, Miniature 7-pin base, used as local oscillator in some TV turret tuners*'''6FQ7''' – See 6CG7*'''6FR7''' – Triode + power triode, Neonoval base, for use as vertical deflection oscillator and amplifier*'''6FV6''' – Sharp-cutoff VHF tetrode, 6.3 V/200 mA heater, Miniature 7-pin base*'''6FV8''', '''6FV8A''' – See 6BR8*'''6FW5''' – Beam power tetrode, 6.3 V/1.2 A heater, 6-pin Octal base, for use as horizontal deflection amplifier*'''6FW7''' – Subminiature, shielded dual medium-μ VHF triode with a base anticipating the Nuvistor, for use as mixer/oscillator*'''6FX4''' – Full-wave rectifier, Miniature 7-pin base*'''6FX7''' – Subminiature, shielded dual medium-μ VHF triode with a base anticipating the Nuvistor, for use as cascode amplifier*'''6FY5/EC97''' – Frame-grid, high-μ VHF triode, Miniature 7-pin base; 2FY5/XC97 or 4FY5/PC97 with a 6.3 V/200 mA heater*'''6FY7''' – ''Compactron'' Dual dissimilar triode, 6.3 V/1.05 A heater, for use as vertical deflection oscillator and amplifier*'''6G11''' – ''Compactron'' Dual dissimilar pentode, 6.3 V/1.2 A heater, for use as FM demodulator and audio power amplifier*'''6GA8/ECC804''' – Separate cathodes dual triode, Noval base*'''6GB5/EL500/EL504''' – Beam power pentode, 6.3 V/1.38 A heater, 9-pin Magnoval base, for use as horizontal deflection amplifier*'''6GC5''' – AF Beam power pentode, 6.3 V/1.2 A heater, Neonoval base*'''6GC6''' – Beam power pentode, 6.3 V/1.2 A heater, 6-pin Octal base, for use as horizontal deflection amplifier*'''6GD7''' – Medium-μ triode + sharp-cutoff pentode, Noval base, for use as VHF oscillator/mixer*'''6GE5''' – ''Compactron'' Beam power pentode, 6.3 V/1.2 A heater, for use as horizontal deflection amplifier*'''6GE8''' – Low-μ triode + sharp-cutoff pentode, 6.3 V/900 mA heater, Noval base, for use as voltage regulator*'''6GF5''' – ''Compactron'' Beam power pentode, 6.3 V/1.2 A heater, for use as horizontal deflection amplififer*'''6GF7''', '''6GF7A''' – Dual dissimilar triode, 6.3 V/985 mA heater, Novar base, for use as vertical deflection oscillator and amplifier*'''[[6GH8]]''', '''6GH8A''' – Medium-μ triode + sharp-cutoff pentode, 6.3 V/450 mA heater, Noval base, for use as horizontal deflection oscillator*'''6GJ5''', '''6GJ5A''' – Beam power pentode, 6.3 V/1.2 A heater, Novar base, for use as horizontal deflection amplifier*'''6GJ7/ECF801''' – Triode + pentode, 6.3 V/410 mA heater, Noval base, for use as VHF oscillator/mixer*'''6GJ8''' – Triode + pentode, 6.3 V/600 mA heater, Noval base*'''6GK6''' – Beam power pentode, 6.3 V/760 mA heater, Noval base, for use as audio power amplifier or CRT cathode driver*'''6GK7''' – Video-IF dual-control pentode with a sharp-cutoff control grid and a remote-cutoff suppressor grid for AGC, Noval base*'''6GL7''' – Dual dissimilar triode, 6.3 V/1.05 A heater, Octal base, for use as vertical deflection oscillator and amplifier*'''6GM6''' – Semiremote-cutoff IF pentode, 6.3 V/400 mA heater, Miniature 7-pin base*'''6GM8/ECC86''' – Dual low (6.3-25 V) anode voltage triode, 6.3 V/330 mA heater, Noval base*'''6GN6''' – Remote-cutoff RF/IF pentode, 6.3 V/300 mA heater, Miniature 7-pin base*'''6GN8''' – See 6EB8*'''6GQ7''' – Triple diode, 6.3 V/450 mA heater, Noval base, for use as AM or FM detector*'''6GS7''' – VHF Triode/pentode oscillator/mixer, 6.3 V/375 mA heater, Noval base*'''6GT5''', '''6GT5A''' – Beam power pentode, 6.3 V/1.2 A heater, Novar base, for use as horizontal deflection amplifier*'''6GU5''' – See 6FS5*'''6GU7''' – Medium-μ dual triode, 6.3 V/600 mA heater, Noval base, for use as vertical/horizontal oscillator or chroma amplifier*'''6GV5''' – ''Compactron'' Beam power pentode, 6.3 V/1.2 A heater, for use as horizontal deflection amplifier*'''6GV7/ECF805''' – Triode + remote-cutoff pentode for use as VHF oscillator/mixer in TV receivers, Noval base; 7GV7/PCF805 with a different heater*'''6GW5''' – Frame-grid VHF triode, 6.3 V/190 mA heater, Miniature 7-pin base*'''6GW6''' – See 6DQ6B*'''6GX6''' – Dual-control, sharp-cutoff pentode, 6.3 V/450 mA heater, Miniature 7-pin base, for use as FM demodulator*'''6GX7''' – Medium-μ triode + sharp-cutoff pentode, 6.3 V/400 mA heater, Noval base, for use as VHF oscillator/mixer*'''6GY5''' – ''Compactron'' Beam power pentode, 6.3 V/1.5 A heater, for use as horizontal deflection amplifier*'''6GY6''' – Dual-control, sharp-cutoff pentode, 6.3 V/450 mA heater, Miniature 7-pin base, for use as gated AGC amplifier and noise inverter*'''6GZ5''' – AF Power pentode, 6.3 V/380 mA heater, Miniature 7-pin base*'''6H4-GT''' – 100 V/4mA Diode, 6.3 V/150 mA heater, 5-pin Octal base*'''6H7S''' – Triode + power pentode with a metal particles spray-shielded envelope, U7A base with triode control grid on top cap*'''6H8-G''' – Common cathode dual diode + pentode, Octal base*'''6HA5/6HM5/EC900''' (''6HA5S'') – Shielded, frame-grid, vari-μ VHF triode, 6.3 V/185 mA heater, Miniature 7-pin base; 3HM5/3HA5/LC900, 4HM5/4HA5/PC900 or 2HM5/2HA5/XC900 with a different heater*'''6HA6''' – Power pentode for use as CRT cathode driver*'''6HB5''' – ''Compactron'' Beam power pentode, 6.3 V/1.5 A heater, for use as horizontal deflection amplifier*'''6HB6''' – Power pentode, 6.3 V/760 mA heater, Noval base, for use as vertical deflection amplifier*'''6HB7''' – Medium-μ triode + sharp-cutoff pentode, 6.3 V/450 mA heater, Noval base, for use as VHF oscillator/mixer*'''6HC8''' – Triode + power pentode, 6.3 V/1.2 A heater, Noval base*'''6HD5''' – Beam power tetrode for use as horizontal deflection amplifier*'''6HD7''' – Medium-μ triode + sharp-cutoff pentode, 6.3 V/450 mA heater, Noval base, for use as VHF oscillator/mixer*'''6HE5/6JB5/6JC5''' – ''Compactron'' Beam power tetrode, 6.3 V/800 mA heater, for use as vertical deflection amplifier*'''6HE7''' – ''Compactron'' High-[[perveance]] CRT horizontal deflection output booster/damper/efficiency diode + beam power pentode, 6.3 V/2.7 A heater, for use as horizontal deflection amplifier*'''6HF5''' – ''Compactron'' Beam power pentode, 6.3 V/2.25 A heater, for use as horizontal deflection amplifier*'''6HF8''' – High-μ triode + sharp-cutoff pentode, 6.3 V/750 mA heater, Noval base, for use as sync separator or DC voltage amplifier and video amplifier*'''6HG5''' – AF Beam power tetrode, 6.3 V/450 mA heater, Miniature 7-pin base*'''6HG8/ECF86''' – Medium-μ triode + sharp-cutoff pentode, 6.3 V/340 mA heater, Noval base, for use as VHF oscillator/mixer*'''6HJ5''' – ''Compactron'' Beam power pentode, 6.3 V/2.25 A heater, for use as horizontal deflection amplifier*'''6HJ8''' – High-perveance diode + sharp-cutoff pentode, 6.3 V/450 mA heater, Noval base, for use as detector or [[Clamper (electronics)|DC restorer]] and IF/AGC amplifier*'''6HK5''' – Frame-grid, vari-μ VHF triode, 6.3 V/190 mA heater, Miniature 7-pin base*'''6HK8''' – Dual VHF triode, Noval base*'''6HL5''' – AF beam power tetrode*'''6HL8''' – Medium-μ triode + sharp-cutoff pentode, 6.3 V/600 mA heater, Noval base, for use as sync separator or DC voltage amplifier and video/IF/AGC amplifier*'''6HA5/6HM5''' – High-μ VHF triode, 6.3 V/180 mA heater, Miniature 7-pin base*'''6HM6''' – Sharp-cutoff IF pentode, 6.3 V/300 mA heater, Noval base*'''6HQ5''' – Sharp-cutoff VHF triode, 6.3 V/200 mA heater, Miniature 7-pin base*'''6HQ6''' – Semiremote-cutoff IF pentode, Miniature 7-pin base*'''6HR5''' – Beam power pentode, 6.3 V/450 mA heater, Miniature 7-pin base, for use as vertical deflection amplifier*'''6HR6''' – Semiremote-cutoff IF pentode, 6.3 V/450 mA heater, Miniature 7-pin base*'''6HS5''' – ''Compactron'' Beam power triode, 6.3 V/1.5 A heater, for use as HV shunt regulator in color TV receivers*'''6HS6''' – Sharp-cutoff IF pentode, 6.3 V/450 mA heater, Miniature 7-pin base*'''6HT6''' – Semiremote-cutoff IF pentode, 6.3 V/300 mA heater, Noval base*'''6HU8/ELL80''' – Dual AF pentode, 6.3 V/550 mA heater, Noval base*'''6HV5A''' – ''Compactron'' Beam power triode, 6.3 V/1.8 A heater, for use as pulse-type HV Regulator*'''6HZ6''' – Sharp-cutoff pentode, 6.3 V/450 mA heater, Miniature 7-pin base, for use as FM demodulator*'''6HZ8''' – High-μ triode + sharp-cutoff pentode, 6.3 V/1.125 A heater, Noval base, for use as sync/DC voltage amplifier and video amplifier*'''6J6/ECC91''' – 600 MHz Dual VHF triode with common cathode, Miniature 7-pin base; ruggedized versions: ''6J6-W'', ''6J6-WA'', ''6J6L/6927''*'''6J7''', '''6J7-G/EF37''', '''6J7-GT''', '''6J7-GTX''' (Ceramic base) – See [[#6C6|{{color|Green|6C6}}]]*'''6J8-G''', '''6J8-GA''' – Triode/heptode oscillator/mixer, Octal base with heptode control grid #1 on top cap*'''6J11''' – ''Compactron'' Dual sharp-cutoff IF pentode, 6.3 V/800 mA heater*'''6JA5''' – ''Compactron'' Beam power pentode, 6.3 V/1 A heater, for use as vertical deflection amplifier*'''6JA8''' – High-μ triode + sharp-cutoff pentode, 6.3 V/750 mA heater, Noval base, for use as sync separator/[[Clipper (electronics)|clipper]], phase inverter and CRT cathode driver*'''6JB5''' – See 6HE5*'''6JB6''', '''6JB6A''' – Beam power pentode, 6.3 V/1.2 A heater, Novar base, for use as horizontal deflection amplifier*'''6JC5''' – See 6HE5*'''6JC6''', '''6JC6A''' – Sharp-cutoff IF pentode, 6.3 V/300 mA heater, Noval base*'''6JC8''' – Medium-μ triode + sharp-cutoff pentode, 6.3 V/450 mA heater, Noval base, for use as VHF oscillator/mixer*'''6JD5''' – See 6HZ5*'''6JD6''' – Sharp-cutoff IF pentode, 6.3 V/300 mA heater, Noval base*'''6JE6''', '''6JE6A''', '''6JE6C/6LQ6/6MJ6''' – Beam power pentode, 6.3 V/2.5 A heater, Novar base, for use as horizontal deflection amplifier*'''6JE8''' – High-μ triode + sharp-cutoff pentode, 6.3 V/780 mA heater, Noval base, for use as sync separator or DC voltage amplifier and video amplifier*'''6JF6''' – Beam power pentode, 6.3 V/1.6 A heater, Novar base, for use as horizontal deflection amplifier*'''6JG5''' – Sharp-cutoff pentode, 6.3 V/525 mA heater, Noval base, for use as video amplifier*'''6JG6''', '''6JG6A''' – Beam power pentode, 6.3 V/1.6 A heater, Novar base, for use as horizontal deflection amplifier*'''6JH5''' – See 6HZ5*'''6JH6''' – Semiremote-cutoff IF pentode, 6.3 V/300 mA heater, Miniature 7-pin base*'''6JK5''' – ''Compactron'' Beam power triode, 6.3 V/1.8 A heater, for use as HV shunt regulator in color TV receivers*'''6JK6''' – Sharp-cutoff IF pentode, 6.3 V/350 mA heater, Miniature 7-pin base*'''6JK8''' – Dual dissimilar triode, 6.3 V/400 mA heater, Noval base, for use as RF amplifier oscillator/mixer*'''6JL6''' – Semiremote-cutoff IF pentode, 6.3 V/350 mA heater, Miniature 7-pin base*'''6JL8''' – Medium-μ triode + power pentode, Noval base*'''6JM6''', '''6JM6A''' – ''Compactron'' Beam power pentode, 6.3 V/1.2 A heater, for use as horizontal deflection amplifier*'''6JN6''', '''6JN6A''' – ''Compactron'' Beam power pentode, 6.3 V/1.2 A heater, for use as horizontal deflection amplifier*'''6JN8''' – Medium-μ triode + sharp-cutoff pentode, 6.3 V/450 mA heater, Noval base*'''6JQ6''' – Beam power tetrode with an integral diode internally connected to the suppressor grid to prevent it from becoming positive, 6.3 V/1.2 A heater, Noval base, for use as vertical deflection amplifier*'''6JR6''' – Beam power tetrode, 6.3 V/1.6 A heater, Novar base, for use as horizontal deflection amplifier*'''6JS6''', '''6JS6A''', '''6JS6C''' – ''Compactron'' Beam power pentode, 6.3 V/2.25 A heater, for use as horizontal deflection amplifier*'''6JT6''', '''6JT6A''' – Beam power pentode, 6.3 V/1.2 A heater, Novar base, for use as horizontal deflection amplifier*'''6JT8''' – High-μ triode + sharp-cutoff pentode, 6.3 V/725 mA heater, Noval base, for use as DC voltage amplifier or sync separator and video amplifier*'''6JV8''' – High-μ triode + sharp-cutoff pentode, 6.3 V/600 mA heater, Noval base, for use as DC voltage amplifier or sync separator and video amplifier*'''6JW6''' – Power pentode for use as CRT cathode driver*'''6JW8/ECF802''' – Triode + sharp-cutoff pentode, 6.3 V/430 mA heater, Noval base, for use as sweep oscillator and reactance tube in TV receivers*'''6JZ6''' – ''Compactron'' Beam power pentode, 6.3 V/1.5 A heater, for use as horizontal deflection amplifier*'''6JZ8''' – ''Compactron'' Medium-μ triode + beam power pentode, 6.3 V/1.2 A heater, for use as vertical deflection oscillator and amplifier*'''6K5-G''', '''6K5-GT''' – High-μ triode, 6.3 V/300 mA heater, 7-pin Octal base*'''6KA8''' – High-μ triode + sharp-cutoff pentode, 6.3 V/600 mA heater, Noval base, for use as sync separator and AGC amplifier/noise inverter*'''6KD6''' – ''Compactron'' Beam power pentode, 6.3 V/2.85 A heater, for use as horizontal deflection amplifier*'''6KD8''' – Medium-μ triode + sharp-cutoff pentode, 6.3 V/400 mA heater, Noval base, for use as VHF oscillator/mixer*'''6KE8''' – Medium-μ triode + sharp-cutoff pentode, 6.3 V/400 mA heater, Noval base, for use as VHF oscillator/mixer*'''6KG6/EL509''', '''6KG6A/EL509''' – Beam power pentode, 6.3 V/2 A heater, Magnoval base, for use as horizontal deflection amplifier*'''6KM6''' – Beam power pentode, 6.3 V/1.6 A heater, Novar base, for use as horizontal deflection amplifier*'''6KN6''' – ''Compactron'' Dual beam power pentode with both sections in parallel for use as horizontal deflection amplifier, 6.3 V/3 A heater*'''6KN8''' – Dual VHF triode for use as [[cascode]] amplifier, Noval base*'''6KR8''', '''6KR8A''' – Medium-μ triode + sharp-cutoff pentode, 6.3 V/750 mA heater, Noval base, for use as video amplifier*'''6KS8''' – High-μ triode + semiremote-cutoff pentode, 6.3 V/600 mA heater, Noval base, for use as sync separator and video amplifier*'''6KT6''' – Semiremote-cutoff pentode, 6.3 V/300 mA heater, Noval base, for use as IF amplifier in TV*'''6KT8''' – High-μ triode + sharp-cutoff pentode, 6.3 V/600 mA heater, Noval base, for use as sync separator or DC voltage amplifier and IF amplifier*'''6KU8''' – Dual diode + sharp-cutoff pentode, 6.3 V/725 mA heater, Noval base, for use as horizontal phase detector and video amplifier*'''6KV6''', '''6KV6A''' – Beam power pentode, 6.3 V/1.6 A heater, Novar base, for use as 6.5k V shunt regulator in color TV receivers*'''6KV8''' – High-μ triode + sharp-cutoff pentode, 6.3 V/775 mA heater, Noval base, for use as sync separator, audio-IF or DC voltage amplifier and video amplifier*'''6KY6''' – Sharp-cutoff pentode, 6.3 V/520 mA heater, Noval base, for use as CRT cathode driver*'''6KY8''', '''6KY8A''' – High-μ triode + beam power pentode, 6.3 V/1.1 A heater, Novar base, for use as vertical deflection oscillator and amplifier*'''6KZ8''' – Medium-μ triode + sharp-cutoff pentode, 6.3 V/450 mA heater, Noval base, for use as VHF oscillator/mixer*'''6LB6''' – ''Compactron'' Beam power pentode, 6.3 V/2.25 A heater, for use as horizontal deflection amplifier*'''6LB8''' – Medium-μ triode + sharp-cutoff pentode, 6.3 V/725 mA heater, Noval base, for use as DC voltage amplifier and video amplifier*'''6LC6''' – Beam power triode, 6.3 V/200 mA heater, Octal base, for use as HV shunt regulator in color TV receivers*'''6LC8''' – High-μ triode + sharp-cutoff pentode, 6.3 V/600 mA heater, Noval base, for use as sync separator and gated AGC amplifier*'''6LD6/EL802''' – Power pentode for color TV, 6.3 V/800 mA heater, Noval base, for use as CRT cathode driver*'''6LF8''' – High-μ triode + sharp-cutoff pentode, 6.3 V/600 mA heater, Noval base, for use as video amplifier*'''6LG6''' – ''Compactron'' Beam power pentode, 6.3 V/2.0 A heater, for use as horizontal deflection amplifier*'''6LH6A/6LJ6A''' – Beam power triode, 6.3 V/200 mA heater, Octal base, for use as HV shunt regulator in color TV receivers*'''6LJ8''' – Medium-μ triode + sharp-cutoff pentode, 6.3 V/400 mA heater, Noval base, for use as VHF oscillator/mixer*'''6LM8''', '''6LM8A''' – Medium-μ triode + semiremote-cutoff pentode, 6.3 V/450 mA heater, Noval base, for use as [[Burst phase|burst]] amplifier*'''6LQ6''' – See 6JE6*'''6LQ8''' – Medium-μ triode + sharp-cutoff pentode, 6.3 V/775 mA heater, Noval base, for use as sync separator or audio-IF amplifier and video amplifier*'''6LR6''' – ''Compactron'' Beam power pentode, 6.3 V/2.5 A heater, for use as horizontal deflection amplifier*'''6LR8''' – High-μ triode + beam power pentode, 6.3 V/1.5 A heater, Novar base, for use as vertical deflection oscillator and amplifier*'''6LT8''' – Dual diode + pentode, 6.3 V/600 mA heater, Noval base, for use as horizontal oscillator and AFC*'''6LU6''' – Pentode, 6.3 V/400 mA heater, Miniature 7-pin base*'''6LU8''' – ''Compactron'' High-μ triode + beam power pentode, 6.3 V/1.5 A heater, for use as vertical deflection oscillator and amplifier*'''6LW6''' – Beam power pentode, 6.3 V/2.65 A heater, 8-pin Octal base, for use as horizontal deflection amplifier*'''6LX6''' – ''Compactron'' Beam power pentode, 6.3 V/2.55 A heater, for use as horizontal deflection amplifier*'''6LX8/LCF802''' – Medium-μ triode + sharp-cutoff pentode, 6.3 V/450 mA heater, Noval base, for use as horizontal oscillator and reactance tube*'''6LY8''' – High-μ triode + sharp-cutoff pentode, 6.3 V/750 mA heater, Noval base, for use as video amplifier*'''6LZ6''' – Beam power pentode, 6.3 V/2.3 A heater, Novar base, for use as horizontal deflection amplifier*'''6M3''' – CRT horizontal deflection output booster/damper/efficiency diode, Octal base with cathode on top cap*'''6M6-G''' – Power pentode, Octal base*'''6M7-G''' – Remote-cutoff RF pentode with a metal particles spray-shielded envelope, Octal base*'''6M8-GT''' – Common cathode diode + triode + pentode, Octal base with pentode control grid on top cap*'''6MA6''' – Beam power triode, 6.3 V/200 mA heater, Octal base, for use as HV shunt regulator in color TV receivers*'''6MB6''' – ''Compactron'' Beam power pentode, 6.3 V/2.25 A heater, for use as horizontal deflection amplifier*'''6MB8''' – Medium-μ triode + sharp-cutoff pentode, 6.3 V/400 mA heater, Noval base, for use as burst amplifier and video amplifier*'''6MC6''' – Beam power pentode, 6.3 V/2.85 A heater, Novar base, for use as horizontal deflection amplifier*'''6ME6''' – Beam power pentode, 6.3 V/2.3 A heater, Novar base, for use as horizontal deflection amplifier*'''6MF8''' – ''Compactron'' High-μ triode + beam power pentode, 6.3 V/1.4 A heater, for use as vertical deflection oscillator and amplifier*'''6MG8''' – Medium-μ triode + sharp-cutoff pentode, 6.3 V/450 mA heater, Noval base, for use as horizontal deflection oscillator, sync separator or AGC amplifier*'''6MH6''' – ''Compactron'' Beam power pentode, 6.3 V/2.65 A heater, for use as horizontal deflection amplifier*'''6MJ6''' – See 6JE6*'''6MQ8''' – Medium-μ triode + sharp-cutoff pentode, 6.3 V/535 mA heater, Noval base*'''6MU8''' – Medium-μ triode + semiremote-cutoff pentode, 6.3 V/600 mA heater, Noval base, for use as burst amplifier*'''6MV8''' – High-μ triode + sharp-cutoff pentode, 6.3 V/600 mA heater, Noval base, for use as sync separator or DC voltage amplifier and IF amplifier*'''6N4''' – UHF Triode, 6.3 V/200 mA heater, Miniature 7-pin base*'''6P6''' – RF power pentode, 6.3 V/700 mA heater, U6A base*'''6P8-G''' – Triode/hexode oscillator/mixer*'''6Q4/EC80''' – VHF Triode, Noval base*'''6Q6-G''' – Diode + triode, 6.3 V/150 mA heater, Octal base*'''6R4/EC81''' – UHF oscillator triode, Noval base*'''6R6-G''' – Remote-cutoff pentode*'''6R8''' – Triple diode + low-μ triode, 6.3 V/450 mA heater, Noval base, for use as AM/FM detector and AF amplifier*'''6S2/EY86''', '''6S2A/EY87''' – Half-indirectly heated CRT EHT rectifier, anode on top cap*'''6S4''', '''6S4A''' – Medium-μ triode, 6.3 V/600 mA heater, Noval base, for use as vertical deflection amplifier*'''6S5''' – Tuning indicator, U6A base*'''6S6-GT''' – Remote-cutoff RF pentode, 6.3 V/450 mA heater, 7-pin Octal base*'''6SD7-GT''' – Semiremote-cutoff RF/IF pentode, 6.3 V/300 mA heater, Octal base*'''6SE7-GT''' – Sharp-cutoff pentode, Octal base*'''6SF7''', '''6SF7-GT''' – Diode + remote-cutoff RF/IF pentode, 6.3 V/300 mA heater, Octal base*'''6SG7''', '''6SG7-GT''' – Semiremote-cutoff RF/IF pentode, 6.3 V/300 mA heater, Octal base*'''6SH7''', '''6SH7-GT''', '''6SH7L''' – Sharp-cutoff RF/IF pentode, 6.3 V/300 mA heater, Octal base*'''6SV7''' – Diode + sharp-cutoff pentode, 6.3 V/300 mA heater, Octal base*'''6SZ7''' – Dual diode + high-μ triode, 6.3 V/150 mA heater, Octal base*'''6T4''' – Low-μ triode, 6.3 V/225 mA heater, Miniature 7-pin base, for use as UHF oscillator*'''6T6-GM''' – RF Pentode, Octal base*'''6T9''' – ''Compactron'' Triode + power pentode*'''6T10''' – ''Compactron'' Dual dissimilar pentode, 6.3 V/950 mA heater, for use as audio output and FM demodulator*'''6TE8-GT''' – Triode/hexode oscillator/mixer, Octal base*'''6U3/EY80''' – CRT horizontal deflection output booster/damper/efficiency diode, Noval base*'''6U4-GT''' – CRT horizontal deflection output booster/damper/efficiency diode, 6.3 V/1.2 A heater, 5-pin Octal base*'''6U6-GT''' – Beam power tetrode, 6.3 V/750 mA heater, 7-pin Octal base, for use as AF output*'''6U9/ECF201''' – Triode + remote-cutoff pentode, 6.3 V/410 mA heater, Decal base, for use as IF amplifier and sync separator or oscillator; 5U9/LCF201 or 8U9/PCF201 with a different heater*'''6V3''', '''6V3A''' – CRT horizontal deflection output booster/damper/efficiency diode, 6.3 V/1.75 A heater, Noval base with cathode on top cap*'''6V5-GT''' – Half-indirectly heated beam power tetrode, Octal base*'''6V8''' – Triple diode + high-μ triode, 6.3 V/450 mA heater, Noval base*'''6W2''' – Subminiature, half-indirectly heated CRT EHT rectifier, anode on top wire*'''6W4-GT''', '''6W4-GTA''' – CRT horizontal deflection output booster/damper/efficiency diode, 6.3 V/1.2 A heater, 5-pin Octal base*'''6W5-G''' – Full-wave rectifier, 6-pin Octal base*'''6W7-G''' – Pentode, 6.3 V/150 mA heater, 7-pin Octal base*'''6X2/EY51''' – 17 kV, 3 mA Half-indirectly heated CRT EHT rectifier, wire-ended*'''6X6-G''' – Tuning indicator, Octal base*'''6X8''', '''6X8A''' – Medium-μ triode + sharp-cutoff pentode, 6.3 V/450 mA heater, Noval base, for use as VHF oscillator/mixer*'''6X9/ECF200''' – Triode + sharp-cutoff pentode, 6.3 V/410 mA heater, Decal base, for use as audio-IF or video amplifier and sync separator, AGC amplifier in TV receivers*'''6Y3-G''' – 5 kV Half-indirectly heated CRT EHT rectifier, Octal base*'''6Y6-G''', '''6Y6-GA''', '''6Y6-GT''' – AF Beam power pentode, 6.3 V/1.25 A heater, 7-pin Octal base*'''6Y7-G''' – Dual power triode, 6.3 V/600 mA heater, Octal base*'''6Y9/EFL200''' – Dual dissimilar pentode, 6.3 V/800 mA heater, Decal base, for use as CRT cathode driver, audio-IF, AGC amplifier, sync separator*'''6Y10''' – ''Compactron'' Dual dissimilar pentode, 6.3 V/830 mA heater*'''6Z4/84''' – Full-wave rectifier, often branded as type 84/6Z4*'''6Z7-G''' – Dual AF triode, 6.3 V/300 mA heater, Octal base, for use in Class-B push-pull amplifiers*'''6Z10''' – See 6J10*'''6ZY5-G''' – Full-wave rectifier, 6.3 V/300 mA heater, 6-pin Octal base*'''7D7''' – Triode/heptode oscillator/mixer, 7 V/480 mA heater, Loctal base*'''12A6''' – 7.5 W AF Beam power tetrode for [[avionics]] use,<ref name="RCAtx1942">[https://frank.pocnet.net/other/RCA/RCA_Guide_for_Transmitting_Tubes_1942.pdf RCA Guide for Transmitting Tubes (July 1942, 172MB)]</ref>{{rp|45}} Octal base*'''12A8-G''', '''12A8-GT''' – Heptode [[pentagrid converter]], 12.6 V/150 mA heater, Octal base*'''12AC5/UF41''' – Remote-cutoff RF pentode, Rimlock base*'''12AD5''' – Remote-cutoff RF pentode, 12.6 V/100 mA heater, Noval base*'''12AE6''', '''12AE6A''' – Dual diode + medium-μ triode, 12.6 V/150 mA heater, Miniature 7-pin base, for use as detector and AF amplifier*'''12AF3''' – CRT horizontal deflection output booster/damper/efficiency diode, 12.6 V/600 mA heater, Noval base*'''12AF6''' – Remote-cutoff RF/IF pentode, 12.6 V/150 mA heater, Miniature 7-pin base*'''12AF11''' – ''Compactron'' High-μ triode + medium-μ triode + sharp-cutoff pentode, 12.6 V/450 mA heater, for use as AGC keyer, sync separator, video amplifier*'''12AJ6''' – Dual diode + medium-μ triode, 12.6 V/150 mA heater, Miniature 7-pin base*'''12AJ7/HCH81''' – Triode/remote-cutoff heptode oscillator/mixer, 12.6 V/150 mA heater, Noval base; 19D8/UCH81 with a different heater*'''12AL11''' – ''Compactron'' Beam power pentode + sharp-cutoff pentode, 12.6 V/450 mA heater, for use as FM demodulator and AF output amplifier*'''12AQ5''' – Beam power pentode, 12.6 V/225 mA heater, Miniature 7-pin base, for use as audio power amplifier or vertical deflection amplifier*'''12AS5''' – AF Beam power pentode, 12.6 V/400 mA heater, Miniature 7-pin base*'''12AU6/HF94''', '''12AU6A''' – Sharp-cutoff RF pentode, 12.6 V/150 mA heater, Miniature 7-pin base*'''12AU8''' – Medium-μ triode + sharp-cutoff pentode, 12.6 V/300 mA heater, Noval base*'''12AV5-GA''' – Beam power pentode, 12.6 V/600 mA heater, Octal base, for use as horizontal deflection amplifier*'''12AW6''' – Sharp-cutoff pentode, 12.6 V/150 mA heater, Miniature 7-pin base*'''12AX3''' – ''Compactron'' CRT horizontal deflection output booster/damper/efficiency diode, 12.6 V/600 mA heater*'''12AX4-GT''', '''12AX4-GTA''', '''12AX4-GTB''' – CRT horizontal deflection output booster/damper/efficiency diode, 12.6 V/600 mA heater, 5-pin Octal base*'''12AY3''', '''12AY3A''' – CRT horizontal deflection output booster/damper/efficiency diode, 12.6 V/600 mA heater, Novar base*'''12B3''' – CRT horizontal deflection output booster/damper/efficiency diode, 12.6 V/600 mA heater, Noval base with cathode on top cap*'''12B6-GM''' – Diode + high-μ triode, 12.6 V/150 mA heater, Octal base*'''12B7''', '''12B7-ML''' – Remote-cutoff pentode, 12.6 V/150 mA heater, Loctal base, often numbered 14A7/12B7*'''12B8-GT''' – Triode + pentode, 12.6 V/300 mA heater, Octal base*'''12BD6''' – Remote-cutoff RF/IF pentode, 12.6 V/150 mA heater, Miniature 7-pin base*'''12BE3''', '''12BE3A''' – ''Compactron'' CRT horizontal deflection output booster/damper/efficiency diode, 12.6 V/600 mA heater*'''12BF6''' – Dual diode + medium-μ triode, 12.6 V/150 mA heater, Miniature 7-pin base*'''12BF11''' – ''Compactron'' Beam power pentode + sharp-cutoff pentode, 12.6 V/600 mA heater, for use as audio power amplifier and FM demodulator*'''12BK5''' – AF Beam power pentode, 12.6 V/600 mA heater, Noval base*'''12BK6''' – Dual diode + high-μ triode, 12.6 V/150 mA heater, Miniature 7-pin base, for use as detector and AF amplifier*'''12BL6''' – Semiremote-cutoff RF/IF pentode, 12.6 V/150 mA heater, Miniature 7-pin base*'''12BN6''', '''12BN6A''' – ''Gated-beam discriminator'' pentode, Miniature 7-pin base, used in [[Detector (radio)#Quadrature detector|FM quadrature demodulators]]; 3BN6, 4BN6, 6BN6 with a 12.6 V/150 mA heater*'''12BQ6-GT''', '''12BQ6-GA''', '''12BQ6-GTB/12CU6''' – Beam power pentode, 12.6 V/600 mA heater, Octal base, for use as horizontal deflection amplifier*'''12BR3''' – CRT horizontal deflection output booster/damper/efficiency diode, 12.6 V/600 mA heater, Noval base*'''12BS3''', '''12BS3A/12DW4A''' – CRT horizontal deflection output booster/damper/efficiency diode, 12.6 V/600 mA heater, Novar base*'''12BT3''' – ''Compactron'' CRT horizontal deflection output booster/damper/efficiency diode, 12.6 V/450 mA heater*'''12BT6''' – Dual diode + high-μ triode, 12.6 V/150 mA heater, Miniature 7-pin base, for use as detector and AF amplifier*'''12BU6''' – Dual diode + low-μ triode, 12.6 V/150 mA heater, Miniature 7-pin base*'''12BV11''' – ''Compactron'' Dual sharp-cutoff dual-control pentode, 12.6 V/450 mA heater, for use as color demodulator*'''12BW4''' – Full-wave rectifier, 12.6 V/450 mA heater, Noval base*'''12BX6''' – Sharp-cutoff RF/IF/video pentode, 12.6 V/150 mA heater, Noval base; 3BX6/XF80, 6BX6/EF80 12BX6 or 19BX6/UF80 with a different heater*'''12BZ6''' – Semiremote-cutoff IF pentode, 12.6 V/150 mA heater, Miniature 7-pin base*'''12C5/12CU5''' – AF Beam power pentode, 12.6 V/600 mA heater, Miniature 7-pin base*'''12C8''', '''12C8-G''', '''12C8-GT''' – Dual diode + semiremote-cutoff pentode, 12.6 V/150 mA heater, Octal base*'''12CA5''' – AF Beam power tetrode, 12.6 V/600 mA heater, Miniature 7-pin base*'''12CK3''' – CRT horizontal deflection output booster/damper/efficiency diode, 12.6 V/600 mA heater, Novar base*'''12CL3''' – CRT horizontal deflection output booster/damper/efficiency diode, 12.6 V/600 mA heater, Novar base*'''12CM6''' – Beam power pentode, 12.6 V/225 mA heater, Noval base, for use as audio power amplifier or vertical deflection amplifier*'''12CR5''' – Beam power tetrode for use as horizontal deflection amplifier*'''12CR6''' – Diode + remote-cutoff pentode, 12.6 V/150 mA heater, Miniature 7-pin base*'''12CS6''' – Dual-control heptode, 12.6 V/150 mA heater, Miniature 7-pin base, for use as sync separator and [[Clipper (electronics)|clipper]]*'''12CT3''' – CRT horizontal deflection output booster/damper/efficiency diode, 12.6 V/600 mA heater, Noval base*'''12CT8''' – Triode + pentode, 12.6 V/300 mA heater, Noval base*'''12CU5''' – AF beam power tetrode, 12.6 V/600 mA heater, Miniature 7-pin base*'''12CU6/12BQ6-GTB''' – Beam power pentode, 12.6 V/600 mA heater, Octal base, for use as horizontal deflection amplifier*'''12D4''', '''12D4A''' – CRT horizontal deflection output booster/damper/efficiency diode, 12.6 V/600 mA heater, 5-pin Octal base*'''12DB5''' – Beam power tetrode, 12.6 V/600 mA heater, Noval base*'''12DJ8''' – Dual triode, 12.6 V/180 mA heater, Noval base, for use as VHF [[cascode]] amplifier*'''12DK6''' – Sharp-cutoff IF pentode, 12.6 V/150 mA heater, Miniature 7-pin base*'''12DM4''', '''12DM4A''' – CRT horizontal deflection output booster/damper/efficiency diode, 12.6 V/600 mA heater, 5-pin Octal base*'''12DM5''' – AF Beam power pentode, 12.6 V/450 mA heater, Miniature 7-pin base*'''12DQ4''' – CRT horizontal deflection output booster/damper/efficiency diode, 12.6 V/600 mA heater, 5-pin Octal base*'''12DQ6A''', '''12DQ6B/12GW6''' – Beam power pentode, 12.6 V/600 mA heater, 5, 6, or 7-pin Octal base, for use as horizontal deflection amplifier*'''12DT8''' – High-μ dual triode, 12.6 V/150 mA heater, Noval base, for use as RF amplifier or oscillator/mixer*'''12DW4A''' – See 12BS3*'''12DW5''' – Pentode, 12.6 V/600 mA heater, Noval base, for use as vertical deflection amplifier*'''12DZ8''' – High-μ AF triode + sharp-cutoff AF power pentode, 12.0 V/450 mA heater, Noval base*'''12E5-GT''' – Triode, 12.6 V/150 mA heater, 6-pin Octal base*'''12ED5''' – Beam power pentode, 12.6 V/450 mA heater, Miniature 7-pin base, for use as AF output*'''12EF6''' – Beam power pentode for use as vertical deflection amplifier*'''12EH5''' – AF Beam power pentode, 12.6 V/600 mA heater, Miniature 7-pin base*'''12EN6''' – Beam power pentode, 12.6 V/600 mA heater, 7-pin Octal base, for use as vertical deflection amplifier in TV*'''12EQ7''' – Diode + sharp-cutoff pentode, 12.6 V/150 mA heater, Noval base, for use as detector and IF amplifier*'''12F5-GT''' – High-μ triode, 12.6 V/150 mA heater, 7-pin Octal base*'''12F8''' – Dual diode + remote-cutoff pentode, 12.6 V/150 mA heater, Noval base, for use as detector and AF amplifier*'''12FQ7''' – Medium-μ dual triode, Noval base, for use as horizontal and vertical deflection oscillator; 6CG7/6FQ7, 8CG7/8FQ7 with a 12.6 V/300 mA heater*'''12FX5''' – AF Power pentode, Miniature 7-pin base; 19FX5 or 60FX5 with a 12.6 V/450 mA heater*'''12G4''' – Medium-μ triode, 12.6 V/150 mA heater; 12J5 with a Miniature 7-pin base*'''12G11''' – ''Compactron'' Dual dissimilar pentode, 12.6 V/600 mA heater, for use as FM demodulator and audio power amplifier*'''12GC6''' – Beam power tetrode, 12.6 V/600 mA heater, 6-pin Octal base, for use as horizontal deflection amplifier*'''12GE5''' – ''Compactron'' Beam power pentode, 12.6 V/600 mA heater, for use as horizontal deflection amplifier*'''12GJ5''', '''12GJ5A''' – Beam power pentode, 12.6 V/600 mA heater, Novar base, for use as horizontal deflection amplifier*'''12GN6''' – Remote-cutoff RF/IF pentode, 12.6 V/150 mA heater, Miniature 7-pin base*'''12GT5''', '''12GT5A''' – Beam power pentode, 12.6 V/600 mA heater, Novar base, for use as horizontal deflection amplifier*'''12GW6''' – Beam power pentode, 12.6 V/600 mA heater, 6-pin Octal base, for use as horizontal deflection amplifier*'''12H6''' – Dual diode, 12.6 V/150 mA heater, 7-pin Octal base*'''12HE7''' – ''Compactron'' High-[[perveance]] CRT horizontal deflection output booster/damper/efficiency diode + beam power pentode, 12.6 V/1.35 A heater, for use as horizontal deflection amplifier*'''12HL5''' – AF beam power tetrode, 12.6 V/450 mA heater, Noval base*'''12HU8/PLL80''' – Dual AF pentode, 12.6 V/300 mA heater, Noval base*'''12J7-GT''' – Sharp-cutoff pentode, 12.6 V/150 mA heater, 7-pin Octal base*'''12JB6''', '''12JB6A''' – Beam power pentode, 12.6 V/600 mA heater, Novar base, for use as horizontal deflection amplifier*'''12JF5''' – ''Compactron'' Beam power pentode, 12.6 V/600 mA heater, for use as horizontal deflection amplifier*'''12JN6''', '''12JN6A''' – ''Compactron'' Beam power pentode, 12.6 V/600 mA heater, for use as horizontal deflection amplifier*'''12JN8''' – Medium-μ triode + sharp-cutoff pentode, 12.6 V/225 mA heater, Noval base*'''12JQ6''' – Beam power tetrode w/ Integral Diode, 12.6 V/600 mA heater, Noval base, for use as vertical deflection amplifier*'''12JS6''' – ''Compactron'' Beam power pentode, 12.6 V/1.125 A heater, for use as horizontal deflection amplifier*'''12JT6''', '''12JT6A''' – Beam power pentode, 12.6 V/600 mA heater, Novar base, for use as horizontal deflection amplifier*'''12K7-G''', '''12K7-GT''' – Remote-cutoff pentode, 12.6 V/150 mA heater, 7-pin Octal base*'''12K8''', '''12K8-GT''' – Triode/hexode oscillator/mixer, 12.6 V/150 mA heater, Octal base*'''12KL8''' – Diode + sharp-cutoff pentode, 12.6 V/150 mA heater, Noval base*'''12Q7-G''', '''12Q7-GT''' – Dual diode + high-μ triode, 12.6 V/150 mA heater, 7-pin Octal base*'''12R5''' – Beam power pentode, 12.6 V/600 mA heater, Miniature 7-pin base, for use as vertical deflection amplifier*'''12S7/UAF42''' – Diode + remote-cutoff RF/IF/AF pentode, Rimlock base*'''12S8-GT''' – Triple diode + high-μ triode, 12.6 V/150 mA heater, Octal base*'''12SF5''', '''12SF5-GT''' – High-μ triode, 12.6 V/150 mA heater, Octal base*'''12SG7''' – Remote-cutoff RF/IF pentode, 12.6 V/150 mA heater*'''12SJ7''', '''12SJ7-GT''' – Sharp-cutoff RF/AF pentode, 12.6 V/150 mA heater, Octal base*'''12SL7-GT''' – High-μ dual triode, 12.6 V/150 mA heater, Octal base, for use as AF or DC voltage amplifier*'''12SN7-GT''', '''12SN7-GTA''' – Medium-μ dual triode, 12.6 V/300 mA heater, Octal base, for use as horizontal multivibrator, phase inverter, or vertical oscillator and amplifier; ruggedized version: '''12SN7-WGT'''*'''12SR7''', '''12SR7-GT''' – Dual diode + triode, 12.6 V/150 mA heater, Octal base, for use as detector and AF amplifier; 6SR7 with a different heater*'''12T10''' – ''Compactron'' Dual dissimilar pentode, 12.6 V/450 mA heater, for use as audio output and FM demodulator*'''12V6-GT''' – Beam power pentode, 12.6 V/225 mA heater, 6- or 7-pin Octal base, for use as audio power amplifier or vertical deflection amplifier; 5V6 or 6V6 with a different heater*'''12W6-GT''' – Beam power pentode, 12.6 V/600 mA heater, 6- or 7-pin Octal base, for use as audio power amplifier or vertical deflection amplifier*'''12AH8''' – Triode/heptode oscillator/mixer, center-tapped 12.6 V/150mA resp. 6.3 V/300 mA heater, Noval base*'''12CN5''' – Low (12.6-16 V) anode voltage sharp-cutoff IF pentode, 12.6 V/450 mA heater, Miniature 7-pin base*'''12CY6''' – Low (12.6-16 V) anode voltage sharp-cutoff RF pentode, 12.6 V/200 mA heater, Miniature 7-pin base*'''12DK5''' – Low (12.6-16 V) anode voltage sharp-cutoff RF/IF pentode, 12.6 V/300 mA heater, Noval base*'''12EK6''' – Low (12.6-16 V) anode voltage sharp-cutoff RF/IF pentode, 12.6 V/200 mA heater, Miniature 7-pin base*'''12EZ6''' – Low (12.6-30 V) anode voltage sharp-cutoff RF/IF pentode, 12.6 V/175 mA heater, Miniature 7-pin base*'''12FK6''' – Low (12.6-16 V) anode voltage dual diode + low-μ triode, 12.6 V/150 mA heater, Miniature 7-pin base, for use as detector, AVC rectifier and AF amplifier*'''14G6''' – Dual diode + triode, 14 V/100 mA heater, Noval base*'''14K7/UCH42''' – Triode/remote-cutoff hexode oscillator/mixer, 14 V heater, Rimlock base*'''14L7/UBC41''' – Shielded dual diode + AF triode, 14 V heater, Rimlock base*'''14Y7''' – Triode/hexode oscillator/mixer, 14 V/100 mA heater, Noval base*'''7AN7/PCC84''' – Dual triode*'''7DJ8''' – Dual VHF triode, 7 V/300 mA heater, Noval base, for use as [[cascode]] amplifier*'''7FC7/PCC89''' – 220 MHz Dual vari-μ frame-grid VHF triode for use as cascode amplifier*'''7GS7''' – Triode + pentode, 7.6 V/300 mA heater*'''7GV7/PCF805''' – Frame-grid triode + remote-cutoff pentode for use as VHF oscillator/mixer in TV receivers, Noval base; 6GV7/ECF805 with a different heater*'''7HG8/PCF86''' – VHF oscillator/mixer frame-grid triode/pentode; 4HG8/XCF86, 5HG8/LCF86, 6HG8/ECF86 or 8HG8 with a different heater*'''9AK8/PABC80''' – [[#6AK8|{{color|Green|6AK8}}]]/[[#EABC80|{{color|Green|EABC80}}]] Triple diode + triode with an 9.5 V heater*'''6LN8/LCF80''' – Medium-μ triode + sharp-cutoff pentode, 6.0 V/450 mA heater, Noval base, for use as VHF oscillator/mixer*'''7KZ6''' – Power pentode for use as CRT cathode driver, 7.3 V/450 mA heater, Noval base*'''14BL11''' – ''Compactron'' Dual dissimilar triode + sharp-cutoff, pentode, 14.2 V/450 mA heater*'''14BR11''' – ''Compactron'' Dual dissimilar triode + sharp-cutoff, frame-grid pentode, 14.2 V/450 mA heater*'''17D4''' – 6DA4/6DM4 Booster/damper/efficiency diode with a 16.8 V heater*'''7EY6''' – Beam power pentode, 7.2 V heater, Noval base, for use as vertical deflection amplifier*'''6CN7''' – Dual diode + high-μ triode, center-tapped 6.3 V/300mA resp. 3.15 V/600 mA heater, Noval base, for use as reactance tube or sync separator/amplifier and Phase detector*'''12Z5''' = '''6Z5''' – Full-wave rectifier, center-tapped 12.6 V/400mA resp. 6.3 V/800 mA heater, U6A base, for use as renewal type for Majestic receivers*'''16BQ11''' – ''Compactron'' Remote-cutoff pentode + sharp-cutoff IF pentode, 16 V/315 mA heater*'''16BX11''' – ''Compactron'' Dual dissimilar triode + pentode, 16 V/315 mA heater*'''18AJ10''' – ''Compactron'' Dual-control pentode + AF power pentode, 18 V/315 mA heater*'''24BF11''' – ''Compactron'' Dual-control, sharp-cutoff pentode + beam power pentode, 24.2 V/315 mA heater*'''24JZ8''' – ''Compactron'' Medium-μ triode + sharp-cutoff pentode, 24.2 V/315 mA heater*'''31AL10''' – ''Compactron'' Dual dissimilar triode + pentode, 31.5 V/315 mA heater*'''32HQ7''' – ''Compactron'' High-[[perveance]] CRT horizontal deflection output booster/damper/efficiency diode + beam power pentode, 32.6 V/315 mA heater*'''45Z3''' – Half-wave rectifier, 45 V/75 mA heater, 7-pin Miniature base*'''1Ж37Б''' ⟼ '''1J37B''' – Dual-control grid pentode (technically a hexode)*'''21''' = '''UX-221''' = '''UX-201-C''' – Triode, export version of the UX-201-A*'''88''' = Perryman '''588''' – Mercury-vapor variant of type 80*'''28''' – 27 with a higher μ:*'''59-B''' – Directly heated variant of 59, used in Majestic receivers*'''64''' (6.3 V/400 mA heater), '''64-A''' = '''36''' (6.3 V/300 mA heater) – Sharp-cutoff tetrode, UY5 base*'''65''' (6.3 V/400 mA heater), '''65-A''' = '''39/44''' (6.3 V/300 mA heater) – Remote-cutoff pentode, UY5 base*'''67''' (6.3 V/400 mA heater), '''67-A''' = '''37''' (6.3 V/300 mA heater) – Medium-μ triode, UY5 base*'''68''' (6.3 V/400 mA heater), '''68-A''' = '''38''' (6.3 V/300 mA heater) – Power pentode, UY5 base*'''96''' – Half-wave Mercury-vapor rectifier, 10 V forward drop*'''98''' = Ken-Rad '''KR28''' – Full-wave Mercury-vapor rectifier, superseded by vacuum type 84:*'''DD/PEN''' – Indirectly heated dual diode + remote-cutoff AF pentode, 4 V/1 A heater, for use as forward-controlling AGC*'''41STH''' = Brimar '''20A1''' = EdiSwan '''AC/TH1''' = M-OV/GEC '''X41''' = Mullard '''TH4A''' – Triode/hexode mixer, 4 V/1.15 A heater, British 7-pin base*'''Q/U37''' – CRT EHT rectifier; premium version of ''U37''*'''3J-187E''' (Glass/metal), '''3JC-187E''' (ceramic/metal) – Forced-air cooled power triode*'''3RM-215G''' – 10 MHz, 8 kW, Water/helix-cooled ''Neotron'', a gridless ''field-effect tube'' where a magnetically-focused electron beam is modulated by varying the voltage of a gate electrode surrounding it. Used as RF power amplifier or oscillator; similar to YD1352S/8867*'''4G/280K''' = '''[[#2D21|{{color|Green|2D21}}]]/EN91''' – 650 V, 100 mA<sub>avg</sub>, 500 mA<sub>peak</sub>, 10 A<sub>surge</sub>, Xenon-filled, indirectly heated tetrode thyratron, negative starter voltage, Miniature 7-pin base, for use as relay driver or grid-controlled rectifier*'''22V/310A''' – 1.4 kV, 250 mA Full-wave Mercury-vapor rectifier*'''G10/241E''' – ''Nomotron'', a unidirectional [[Dekatron]] with multi-alloy cathodes*'''G75/2D''' = '''0A3''' = M-OV/GEC '''QS75/40''' – 75 V Voltage-regulator tube, Octal base*'''P535-1E''' = WE '''715B''' (15 kV), '''P552-1E''' = '''5D21''' (20 kV) – Pulse-rated power tetrodes for use in ''hard-tube pulser'' radar modulators===CSF and La Radiotechnique===[[Compagnie générale de la télégraphie sans fil|CSF]] and its subsidiary [[Radiotechnique|LaRadiotechnique]] mostly assigned the letter '''R''' followed by an up to 3-digit number to their tubes, until Radiotechnique was fully acquired by [[Philips]] in 1947 and adopted the [[#Mullard–Philips system|{{color|Green|Mullard–Philips scheme}}]];Examples:*'''R5''' (3.8 V/700 mA filament), '''R14''', '''R15''', '''R24''' (3.5 V/60 mA filament) – Miniature triodes, 4-pin base*'''R18''' – ''BiGril'' [[Tetrode#Space charge grid tube|Space charge grid]] tetrode, 3.8 V/360 mA filament, 4-pin base*'''R31''', '''RW1''' – AF Power triode, 3.5 V/800 mA filament, 4-pin base*'''R36''', '''R36D''' (Selected for [[grid-leak detector]] service) – Miniature triode, 3.5 V/60 mA filament, 4-pin base*'''R41''' – RF Power triode, 3.8 V/400 mA filament, 4-pin base*'''R43''' – ''MicroBiGril'' Miniature space charge grid tetrode, 3.8 V/700 mA filament, 4-pin base*'''R50''' – AF Power triode, 3.5 V/100 mA filament, 4-pin base*'''R120''' – AF Power triode, 6.3 V/100 mA heater, Octal base*'''R125C''' – Long-life dual diode + triode, 18 V/400 mA heater, Octal base*'''R128''' – Long-life, separate cathodes dual diode, 18 V/200 mA heater, Octal base*'''R144''' = '''EF91/6AM6''' = Brimar '''8D3''' = M-OV/GEC '''Z77''' (''6064'', ''M8083'') – Sharp-cutoff pentode, Miniature 7-pin base*'''R148''' – Long-life, separate cathodes dual triode, 18 V/200 mA heater, [[Postes, Télégraphes et Téléphones (France)|French ''PTT]]-49'' 8-pin base*'''R242P''' – Subminiature VHF triode for use as an oscillator, 6.3 V/150 mA heater, all-glass round cross-section envelope, circular 5-pin/wire-ends base*'''R243''' = '''EC55/5861''' – 3 GHz, 10 W ''Rocket''-type ''disk-seal'' UHF triode*'''R290''' – Directly heated, [[Thermionic emission|thermally-limited (=''saturated'') emission]], vacuum [[Noise generator|noise diode]], 1.85 V/2.7 A uncoated, Thorium-free Tungsten filament, all-glass, Noval base*'''416A''' – 4 GHz Planar SHF power triode derived from WE prototype 1553<ref>{{cite web |url=http://www.ase-museoedelpro.org/Museo_Edelpro/Catalogo/Overview/docs/bstj29-4-531.pdf |title=A new microwave tube: Its performance as a Modulator and as an Amplifier |series=The [[Bell System]] technical journal |publisher=[[Western Electric]] |date=20 March 1950 |author1=Bowen, A.E. |author2=Mumford, W.W. |access-date=27 August 2023}}</ref>*'''844''' – Indirectly heated RF power tetrode, 2.5 V/2.5 A heater, UY5 base with a top cap,<ref>[https://www.radiomuseum.org/tubes/tube_844.html 844 on radiomuseum.org]</ref> not to be confused with CV844*'''EMV-3A''' – ''{{Tooltip|Emerson|Emerson Radval Corporation, New York, NY, USA}} MultiValve Three-In-One'' triple triode for use as RF amplifier, [[grid-leak detector]], and AF power amplifier, 250 mA filament, UX4 base with four additional screw terminals on a platform on top of the base<ref>[https://lampes-et-tubes.info/rt/Emerson_Multivalve.pdf 1927 Advertising] • on [https://lampes-et-tubes.info/rt/rt190.php?l=e Lampes-et-tubes]</ref>*'''DDT16''' – Indirectly 16 V/250 mADC heated dual diode + high-μ triode, British 7-pin base*'''DHL''' – Indirectly 16 V/250 mADC heated medium-μ triode, European 5-pin base*'''DP''' – Indirectly 16 V/250 mADC heated power triode, European 5-pin base*'''DP/PEN''' – Indirectly 16 V/250 mADC heated power pentode, British 7-pin base*'''DS/PEN''' – Indirectly 16 V/250 mADC heated pentode, European 5-pin base*'''DVS/PEN''' – Indirectly 16 V/250 mADC heated, remote-cutoff pentode, European 5-pin base*'''DVSG''' – Indirectly 16 V/250 mADC heated, remote-cutoff tetrode, European 5-pin base*'''6F12''' – Sharp-cutoff RF pentode, Miniature 7-pin base; ruggedized version: ''S6F12''*'''6F17''' – Pulse/RF beam tetrode, Miniature 7-pin base; ruggedized versions: ''S6F17'', ''S6F17F''*'''6F33''' – Dual-control, sharp-cutoff pentode, Miniature 7-pin base; ruggedized version: ''S6F33''*'''S2P20''' (''5A6'', 100 MHz), '''S2P21''' (200 MHz) – 5 W VHF beam power tetrode, directly heated with a center-tapped 5.0 V resp. 2.5 V filament, Noval base*'''S11E12''' = '''7971''' – Beam power tetrode for use as series or shunt regulator in DC power supplies, 6.3 V/1.6 A heater, Octal base*'''S19G6F''' – 6 kV, 30 mA Half-wave rectifier, 4 V/500 mA heater, Miniature 7-pin base*'''MR15''' – Thyratron*'''MR304''' – Half-wave, Mercury-vapor rectifier;—1936 update:*'''N''' – Beam power tetrode or power pentode; replacing PT, MPT*'''W''' – Remote-cutoff pentode; replacing VMP*'''Z''' – Sharp-cutoff RF pentode; replacing SP*'''DS''' – Indirectly 16 V/250 mADC heated tetrode, European 5-pin base*'''DHD''' – Indirectly 16 V/250 mADC heated dual diode + high-μ triode, British 7-pin base*'''DL''' – Indirectly 16 V/250 mADC heated low-μ triode, European 5-pin base*'''DPT''' – Indirectly 16 V/250 mADC heated power pentode, available in European 5-pin or British 7-pin base*'''VDS''' – Indirectly 16 V/250 mADC heated, remote-cutoff tetrode, European 5-pin base*'''MH40''' – Microphone preamplifier triode, 4 V/1 A heater, European 5-pin base====={{anchor|MOPro}}Professional tubes=====Letter(s): Type*'''A''', '''Q/A''' (Special quality) – Professional tube*'''MR''', '''Q/MR''' – Mercury-vapor rectifier*'''QS''' (also used by EEV), '''STV''' ("Stabilovolt", also used by Telefunken) – [[Voltage-regulator tube]]*'''U''', '''Q/U''' – High-vacuum rectifier:'''Note:''' QA (Octal base), QE, QM, QO, QR (Miniature 7-pin base) indicate [[Crystal oscillator|Quartz crystals]]Then a 3- or 4-digit number;Examples:<ref name="GECTransmittingIndustrial1971">{{cite web |url=https://frank.pocnet.net/other/MOValve/MOValve_Transmitting&IndustrialTubes_1971-10.pdf |title=GEC Transmitting and Industrial Tubes Catalogue (16MB) |date=October 1971 |access-date=14 July 2023}}</ref>*'''A537''' – [[Microphone preamplifier]] triode, 4 V/400 mADC heater, British side-contact 4 base with control grid on top cap*'''A577''' – Triode for use as cathode follower rectifier in vacuum tube RF voltmeters, indirect 4 V/1amp; A heater, European 5-pin base with control grid on top cap, use as AF amplifier not recommended*'''A1714''' (''CV408'') – Planar UHF triode, Miniature 7-pin base; similar to 9002*'''A2087''' (''CV2171'') – Directly heated, [[Thermionic emission|thermally-limited (=''saturated'') emission]], vacuum [[Noise generator|noise diode]], 4.3 V/600 mA filament, Miniature 7-pin base*'''A2293''' – Power triode for use as series regulator in DC power supplies, Noval base*'''A2521''' = '''6CR4''' (UHF, [[Valve RF amplifier#Grounded grid amplifier|grounded-grid]], ''CV2453''), '''A2599''' (VHF, grounded-cathode, ''CV5242'') – Triodes, Noval base, used as [[cascode]] amplifier up to 200 MHz*'''A3064''' = '''Q/A2403''' = '''6064''' – Sharp-cutoff RF pentode; premium version of ''Z77'' = ''6AM6/EF91''*'''Q/A2401''' – Small-power VHF triode; premium version of ''6C4/EC90''<ref>[https://www.radiomuseum.org/tubes/tube_qa2401.html Q/A2401 on radiomuseum.org]</ref>*'''Q/A2402''' – AF power pentode; premium version of ''N77'', ''6AM5/EL91''<ref>[https://www.radiomuseum.org/tubes/tube_qa2402.html Q/A2402 on radiomuseum.org]</ref>*'''Q/A2404''' = '''Q/D77''' – Dual diode with separate cathodes; premium version of ''D77'', ''6AL5/EAA91''<ref>[https://www.radiomuseum.org/tubes/tube_qa2404.html Q/A2404 on radiomuseum.org]</ref>*'''Q/A2405''' – 160 MHz Dual beam power tetrode, B9G 9-Pin Loctal base<ref>[https://www.radiomuseum.org/tubes/tube_qa2405.html Q/A2405 on radiomuseum.org]</ref>*'''Q/A2406''' – Dual high-μ triode; premium version of ''B309'', ''12AT7/ECC81''<ref>[https://www.radiomuseum.org/tubes/tube_qa2406.html Q/A2406 on radiomuseum.org]</ref>*'''Q/A2408''' – Dual triode, Octal base; premium version of ''B65''<ref>[https://www.radiomuseum.org/tubes/tube_qa2408.html Q/A2408 on radiomuseum.org]</ref>*'''Q/MR201''' – Half-wave [[Mercury-arc valve|Mercury-vapor rectifier]]*'''QS1200''' (6354/150B2) – Voltage-regulator tube, Miniature 7-pin base*'''QS1218''' – 2 kV/250 µA Corona voltage-regulator tube, Miniature 7-pin base with anode on top cap*'''Q/U452''' (2 V/800 mA heater), '''Q/U456''' (6.3 V/220 mA heater) – 17.5 kV/500 µA Oscilloscope CRT EHT rectifier:*'''GHU''' – Hydrogen or deuterium-filled [[Electric arc|arc-discharge]] tube*'''SC''' – [[Voltage-regulator tube|'''C'''orona '''s'''tabilizer]]*'''SD''' – [[Surge protector#Gas discharge tube (GDT)|Cold-cathode '''s'''urge protection '''d'''evice]]*'''EHT7''' –:#Marconi: 200 W, 60 kV Rectifier,<ref>[https://lampes-et-tubes.info/doc/marconi/EHT7.pdf Marconi EHT7 Datasheet]</ref> or:#GEC: 1.2 kW, 100 kV Modulator triode<ref name="GECTransmittingIndustrial1971" />{{rp|6,13}}*'''MR1''', '''MR2''', '''MR3''', '''MR4''', '''MR5''', '''MR7A''' – High-vacuum rectifiers*'''6L50''' – VHF power pentode; derived from Telefunken/Luftwaffe LS50*'''1C4''' – Remote-cutoff pentode, 120 mA filament, UX4 base with control grid on top cap*'''1D4''' – Power pentode, 240 mA filament, UY5 base*'''1K4''' (UX4 base), '''1K5-G''' (Octal base) – AF power pentode with control grid on top cap, 120 mA filament*'''1K6''' (U6A base), '''1K7-G''' (Octal base) – Dual diode + AF power pentode with control grid on top cap, 120 mA filament*'''1L5-G''' – Power pentode, 240 mA filament, Octal base*'''1M5-G''' – Remote-cutoff pentode, 120 mA filament, Octal base with control grid on top cap*'''5794''', '''6562''' – 1680 MHz, 600 mW ''Pencil''-type power triode oscillator assembly with integral cathode and anode [[Microwave cavity|cavity resonators]] for use in ''[[Radiosonde]]'' weather balloon transmitters*'''IF80''' – Long-life sharp-cutoff RF pentode for use as preamplifier in telecomms [[Long line (telecommunications)|wide-area]] receivers; EF80 with a 95 mA heater*'''413A''' – 55...75 V, 200 mA [[Surge protector#Gas discharge tube (GDT) Spark Gap|Gas-filled cold-cathode surge protector]], triggers at 180...255 V, [[Radium bromide|RaBr<sub>2</sub>]] keep-alive, 2-pin base<ref>{{cite web |url=http://www.4tubes.com/1-DATASHEETS/SCANS-Original/!5-Numbers-100--999/413A_WE_Datasheet.pdf |title=413A Electron Tube |publisher=[[Western Electric]] |date=April 1956 |access-date=12 June 2021}}</ref>*'''MR1''' (also EdiSwan), '''MR2''', '''MR3''', '''MR4''', '''MR5''', '''MR6''', '''MR7A''' – High-vacuum rectifiers*'''MT1''', '''MT2''', '''MT4''', '''MT6''' – Power triodes for use in transmitters, joint 1919 EdiSwan+Marconi+Osram ventureThe [[Tungsten]] that tube heaters are usually made of, exhibits a [[Temperature coefficient#Positive temperature coefficient of resistance|positive temperature coefficient of resistance]], meaning the cold resistance is much lower than the hot resistance, causing a considerable [[inrush current]] when powering up a device.#*{{anchor|Heaters_ParallelRF}}However, most [[Valve RF amplifier|RF power tubes]] are directly heated, so for the abovementioned reason, the heater voltage must be much smaller than the signal voltage on the control grid and is therefore in the 1.1 to 25 V range, drawing up to hundreds of Amperes from a suitable heater transformer capable of slowly ramping up the heater voltage to smooth out the otherwise destructive heater inrush current, and to minimize thermal stress to the [[Glass-to-metal seal|vacuum seals]], when powering up.<br />Some high-power RF tubes have a [[Two-phase electric power|2-phase]] (Eimac 8974, RCA 891 and Philips TAW12/10) or [[Three-phase electric power|3-phase]] (RCA 893, 898 and Philips TAW12/35G, TBW15/125) heater to reduce [[Mains hum|hum]].#*have the same warm-up [[time constant]], typically 11 seconds, controlled by increasing the cathode's [[heat capacity|thermal capacity]] so it wouldn't overheat when powering up*Up to 2 sequentially assigned letters, skipping the letters I and O and starting amplifier tubes from the letter A, working forward through the alphabet, while starting rectifier tubes from the letter Z, working backwards; since the two met (first the numerous 6-prefix, low elements-count tubes {{circa|1937}}), the single-letter [[namespace]] became exhausted, so combinations like AB, AC, AD, AE... were used, avoiding same-letter repetitions and reserving those ending in '''P''' for CRTs ([[#RETMA_CRT|{{color|Green|see below}}]])<br />Wherever possible, different-heater versions retained the original's letter combination; exceptions include: the 12BR7 and 9BR7 are unrelated to the 6BR7; the series heater versions of the 6.3 V/450 mA 6BL8/ECF80 are the 9.0 volts 9A8/PCF80 for 300mA strings, the 6.0 volts (thus requiring a different letter combination) 6LN8/LCF80 with controlled warm-up for 450mA strings, and the 4.6 volts 4BL8/XCF80 for 600mA strings<br />The development of new tubes ended with the combination MV, although already by the end of the one-letter era, when the control grid top cap was discontinued and replaced by a regular base pin ("single-ended tube" - all connections on one end; not to be confused with the [[Single-ended triode|single-ended amplifier circuit]]), so-modified existing tubes, and the first new ones thereafter, were marked with a preceding letter '''S''' (6F5 → 6SF5, 6K7 → 6SK7, 1SA6-GT, 1SB6-GT, 6SB7Y, 6SC7, 6SL7-G, 6SU7-GTY).<ref name="Aerovox1939" /> Similarly in the 1940s, [[#1.4 volt DC filament/heater tubes|{{color|Green|1.4 volt DC filament tubes}}]] (and the 2.8 volts center-tapped 3LE4, 3LF4) with a Loctal base were marked with a preceding letter '''L'''*K8B ''MazdaOctal'' bases have a larger spigot than K8A InternationalOctal, to better protect the [[evacuation tip]], and the filament/heater is between pins 1 and 8 (IO: 2 and 7)*"DC*/" types are indirectly heated receiver tubes for use in a series heater string running on a then-still commonplace municipal [[Electrification#Central power stations and isolated systems|DC mains system]];<ref name="MazdaEdiSwan1970">[https://frank.pocnet.net/other/Mazda/Mazda-DataBooklet1970Valve&PictureTubes.pdf Mazda DataBooklet 1970 Valve & Picture Tubes]</ref>{{rp|113}} cf. [[#Heaters_SeriesDC|{{color|Green|180mADC standard}}]]*'''DC/HL''' – Medium-μ triode, 6 V/500 mA heater, European 5-pin base*'''DC/P''' – AF power triode, 8 V/500 mA heater*'''DC/PEN''' – AF power pentode, 8 V/500 mA heater, European 5-pin base*'''DC/SG''' – RF tetrode, 6 V/500 mA heater, European 5-pin base*'''DC2/HLDD''' – Dual diode + AF triode, 25 V/100 mA heater*'''DC2/P''' – AF power triode, 35 V/100 mA heater*'''DC2/PEN''' – AF power pentode, 100 mA heater, European 5-pin base*'''DC2/SG''' – RF tetrode, 20 V/100 mA heater*'''DC2/SGVM''' – Vari-μ RF tetrode, 20 V/100 mA heater*'''DC3/HL''' – Medium-μ triode, 25 V/100 mA heater*'''H141D''' – Diode + AF triode, 1.4 V/50 mA filament, MazdaOctal base*'''HL41DD''' (Medium-μ), '''HL42DD''' (Vari-μ) – Dual diode + AF triode, 4 V/650 mA heater, MazdaOctal base with control grid on top cap*'''P41''' (4 V/950 mA heater), '''P61''' (6.3 V/600 mA heater) – RF triode, MazdaOctal base, [[Gain (electronics)|μ]] = 17*'''PEN141''' – 240 mW AF power pentode, MazdaOctal base, 1.4 V/100 mA filament*'''SP41''' (4 V/950 mA heater), '''SP61''' (6.3 V/600 mA heater) – Sharp-cutoff RF pentode, MazdaOctal base, g<sub>m</sub>: 8.5 mS*'''SP141''' – Sharp-cutoff RF pentode, 1.4 V/50 mA filament, MazdaOctal base, g<sub>m</sub>: 900 µS*'''PL435''' = '''PL4C35''' = '''4C35''', '''PL522''' = '''PL5C22''' = '''5C22''' – Half-indirectly heated, Hydrogen triode thyratrons for use in [[Radar#Modulators|radar modulators]], B4D Superjumbo base with anode on top cap*'''PL2952A''', '''PL5553B''' = '''5553B''' – Water-cooled Ignitrons for use in DC [[Welding power supply|welding power supplies]]*'''PL5551''' = '''5551''', '''PL5552''' = '''5552''', '''PL5882''' = '''5882''' – Water-cooled Ignitrons for use in [[Electric resistance welding|resistance welding]] power supplies*'''PL5555''' = '''5555''' – Water-cooled Ignitron for use as AC control or controlled rectifier*'''PL5822''' = '''5822''' – Water-cooled Ignitron for use in [[frequency changer]] welding power supplies*'''1AE4''' – Sharp-cutoff pentode, 100 mA filament, Miniature 7-pin baseDesigned for use in [[dry cell]] battery-only or in ''Three-way portable'' (AC/DC/Dry-cell) radio receivers*'''1AF4''' – Sharp-cutoff pentode, 25 mA filament, Miniature 7-pin base*'''1AF5''' – Diode + pentode, 25 mA filament, Miniature 7-pin base*'''1D8-GT''' – Diode + triode + power pentode, 100 mA filament, Octal base with triode grid on top cap*'''1DN5''' – Diode + remote-cutoff pentode, 50 mA filament, Miniature 7-pin base*'''1H5-GT/DAC32''' – Diode + high-μ AF triode, 50 mA filament, Octal base with triode grid on top cap*'''1LA4''' – Power pentode, 50 mA filament, Loctal base*'''1LB4''' – Power pentode used in the T/O 8G005Y, 50 mA filament, Loctal base*'''1LB6''' – Heptode pentagrid converter, 50 mA filament, Loctal base*'''1LC5''' – Sharp-cutoff pentode, 50 mA filament, Loctal base*'''1LC6''' – 1LA6 with higher conversion [[transconductance]], 50 mA filament, Loctal base*'''1LD5/DAF26''' – Diode + sharp-cutoff pentode used in the T/O 7G605/8G005Y, 50 mA filament, Loctal base*'''1LE3''' – Medium-μ triode used in the T/O 8G005Y, 50 mA filament, Loctal base*'''1LG5''' – Remote-cutoff RF/IF pentode, 50 mA filament, Loctal base*'''1LH4''' – Diode + high-μ AF triode, 50 mA filament; 1H5-GT/DAC32 with its top cap discarded and a Loctal base*'''1LN5''' – Sharp-cutoff pentode used in the T/O 7G605/8G005Y, 50 mA filament, Loctal base*'''1N6-G''' – Diode + power pentode, 50 mA filament, Octal base*'''1P5-G''', '''1P5-GT''' – Sharp-cutoff pentode, 50 mA filament, Octal base with control grid on top cap*'''1SA6-GT''' – Semiremote-cutoff RF/IF pentode, 50 mA filament, single-ended tube (no top cap), Octal base*'''1SB6-GT''' – Diode + sharp-cutoff pentode, 50 mA filament, Octal base*'''1T5-GT''' – AF beam power pentode, 50 mA filament, Octal base*'''1W4''' – Power pentode, 50 mA filament, Miniature 7-pin base*'''3LE4''' – 325 mW AF power pentode, Loctal base*'''3Q5-GT/DL33''' – 330 mW AF beam power pentode, Octal base*'''6AK4''' – 500 MHz, 750 mW Subminiature medium-μ UHF triode, 150 mA filament, all-glass round cross-section envelope, circular 8-pin/wire-ends; ruggedized version: 6K4*'''6AZ5''' – Subminiature dual diode, separate cathodes, all-glass round cross-section envelope, circular 8-pin/wire-ends*'''6BA5''' – Subminiature, sharp-cutoff pentode, all-glass round cross-section envelope, circular 8-pin/wire-ends*'''6BF7''' – Subminiature, separate cathodes dual triode, all-glass round cross-section envelope, circular 8-pin/wire-ends base; similar to 6J6*'''6F8''' – Indirectly heated dual medium-μ triode, Octal base with one control grid on top cap; two 6J5 in one envelope*'''6K4''' (''6AK4'') – 500 MHz, 750 mW Ruggedized, subminiature medium-μ UHF triode, 150 mA filament, all-glass round cross-section envelope, chaotic 5-pin/wire-ends*'''6Q7''' – Common cathode dual diode + high-μ AF triode, Octal base with control grid on top cap, μ = 70*'''6SF5''' – High-μ triode, Octal base; derived from 6F5, discarding its control grid top cap*'''6SQ7''' – Dual diode + high-μ triode, Octal base; derived from 6Q7 discarding its control grid top cap*'''6ST7''' – Dual diode + high-μ triode, Octal base; derived from 6T7 discarding its control grid top cap*'''5908''' – Ruggedized, subminiature, low (26.5-55 V) anode voltage, dual-control, sharp-cutoff VHF pentode designed for both heater and anode to run directly off the standard avionics 28-volts DC bus, for use as a gated or gain-controlled amplifier, 26.5 V/150 mA heater, all-glass round cross-section envelope, circular 8-pin/wire-ends base; similar to 5784*'''6206''' – Ruggedized, subminiature, semiremote-cutoff UHF pentode, 6.3 V/150 mA heater, all-glass round cross-section envelope, circular 8-pin/wire-ends base*'''6213''' – 130 V Subminiature cold-cathode, glow-discharge voltage-regulator tube, all-glass round cross-section envelope with 3 long wire-ends*'''6308''' – Ruggedized, subminiature 87 V cold-cathode, glow-discharge voltage-regulator tube, all-glass round cross-section envelope, circular 8-pin/wire-ends base*'''6397''' – Ruggedized, subminiature VHF power pentode, directly heated with a center-tapped 2.5 V/62.5 mA resp. 1.25 V/125 mA filament, all-glass round cross-section envelope, circular 8-pin/wire-ends base*'''6872''' – Ruggedized, subminiature, semiremote-cutoff VHF pentode, 6.3 V/200 mA heater, all-glass elliptical envelope, inline 7 long wire-ends *'''6944''' – Ruggedized, subminiature, semiremote-cutoff RF pentode, 6.3 V/175 mA heater, all-glass round cross-section envelope, circular 8-pin/wire-ends base*'''6945''' – Ruggedized, subminiature, AF beam power pentode, 6.3 V/350 mA heater, all-glass round cross-section envelope, circular 8-pin/wire-ends base*'''1C4''' – Remote-cutoff pentode, 120 mA filament, UX4 base with control grid on top cap*'''IF80''' – Long-life sharp-cutoff RF pentode for use as preamplifier in telecomms [[Long line (telecommunications)|wide-area]] receivers; EF80 with a 95 mA heater*'''CK1036''' = '''6436''', '''CK1042''' = '''6659''' – Half-wave noble gas-filled rectifier for use in [[vibrator (electronic)|vibrator]] power supplies, all-glass with 2 long wire-ends*'''5AZP4''' – 5" [[CRT projector|Projection CRT]], 40 kV anode voltage, considerable [[X-ray tube#Hazards of X-ray production from vacuum tubes|X-radiation]], 50° magnetic deflection, P4 white, medium-persistence, casts an {{cvt|8|×|6|ft|m|1}} image*'''5TP4''' – 5" Projection CRT, 27 kV anode voltage, considerable X-radiation, 50° magnetic deflection, P4 white, medium-persistence*'''PD220''' {{Nowrap|([[Transconductance|g<sub>m</sub>]]: 900 [[Siemens (unit)|µS]])}}, '''PD220A''' {{Nowrap|(g<sub>m</sub>: 1.6 mS)}} – Directly heated dual AF power triode designed for operation with positive grid bias, 2 V filament for use in battery receivers, British 7-pin base (1939)'''QP25''' {{Nowrap|(g<sub>m</sub>: 3 mS, MazdaOctal base)}}, '''QP230''' {{Nowrap|(g<sub>m</sub>: 3 mS, British 7-pin base)}}, '''QP240''' {{Nowrap|(g<sub>m</sub>: 4 mS, British 9-pin base)}} – ''Quiescent Push-Pull'', directly heated dual AF power pentodes, 2 V filament for use in battery receivers (1939){{anchor|PhilipsPL}}Philips used more freeform designations for [[thyratron]]s and [[Ignitron]]s; examples are:*'''PL17''' = '''PL5557''' = '''5557''' – 2.5 kV, 500 mA<sub>avg</sub>, 2 A<sub>peak</sub> Mercury-vapor thyratron*'''PL57''' = '''PL5559''' = '''5559''' – 1 kV, 2.5 A<sub>avg</sub>, 15 A<sub>peak</sub> Mercury-vapor thyratron====={{anchor|TungsramTT}}Transmitting tubes=====Letter(s): System type:*'''OQ''', '''OQQ''', '''OT''' – Triode*'''OS''', '''P''' – PentodeThe following number indicates the anode voltage in VThen a slash ("/")The following number indicates the anode dissipation in W===={{anchor|日本国Pro}}Professional tubes====This is very similar to the [[#RMA professional tubes system|{{color|Green|RMA system}}]]<ref name="Fujitsu1971">[https://frank.pocnet.net/other/Japanese/TEN_Fujitsu_TransmittingTubes.pdf Fujitsu 1971 Tube Manual]</ref><ref name="JRC_TransmittingTubes">[https://frank.pocnet.net/other/Japanese/JRC_TransmittingTubes.pdf JRC Transmitting Tube Manual]</ref>First digit::—'''Normal tubes:''' Power class:—'''Microwave tubes:''' Frequency in GHzNext character: Function - multiple section tubes are assigned one letter corresponding to one set of electrodes:*'''B''' – Beam power tetrode*'''F''' – Tetrode*'''G''' – [[Thyratron]] or [[Ignitron]]*'''H''' – [[Mercury-arc valve|Mercury-vapor]] or noble-gas rectifier*'''K''' – Kenotron*'''M''' – [[Cavity magnetron|Magnetron]]*'''P''' – Pentode*'''T''' – Triode*'''V''' – [[Sutton tube|Reflex Klystron]]:*'''AV''' – [[Klystron]]*'''W''' – [[Traveling-wave tube]]Lastly, a sequentially assigned number*'''8020''' – Directly heated, -40...+12.5 kV, 100 mA [[Thermionic emission|thermally-limited (=''saturated'') emission]] diode, 5 V/6 A thoriated Tungsten filament, for use as a surge-limiting [[High voltage|EHT]] rectifier*'''ME41''' – "Magic Eye"-type [[Magic eye tube|tuning indicator]], 4 V/500 mA heater, MazdaOctal base, ''Glass Tubular'' envelope; ''Shouldered'' version with British 7-pin base: AC/ME*'''ME91''' – "Magic Eye"-type tuning indicator, 9 V/200 mA heater, MazdaOctal base, ''Glass Tubular'' envelope, for use in AC/DC series heater radios*'''ME920''' – "Magic Eye"-type tuning indicator, 9 V/200 mA heater, British 7-pin base, ''Shouldered'' envelope, for use in AC/DC series heater radios===={{anchor|OEMS}}'''MS'''====[[Mullard]]:*'''MS11-1''' – 11 cm (4") [[Black and white|B/W]] TV [[Rear-projection television|Rear-projection CRT]], 25 kV anode voltage, magnetic deflection and focusing, V5A side-contact 5 base:'''4CX250R/7580-W''' – Ruggedized version of 4CX250B, 6.0 V heater*'''4PR60B/8252''' – 60 W<sub>avg</sub>, 300 kW<sub>peak</sub> Glass pulse power tetrode, radiation+forced-air cooled, for use as modulator/amplifier; ruggedized version: 4PR60C/8252-W*'''QP''' – '''''Q'''uiescent '''P'''ush-Pull'' Dual AF power pentode for use in battery receivers*'''PA20''' – 15 W Directly heated AF power triode, European 4-pin base*'''PA40''' – 40 W Directly heated AF power triode, European 4-pin base*'''{{Visible anchor|N40}}''' – First commercially available beam power tetrode<ref name="Electronics-1935-02">{{cite journal |url=https://worldradiohistory.com/Archive-Electronics/30s/Electronics-1935-02.pdf |journal=[[Electronics (magazine)|Electronics]] |title=New Output Tetrode |volume=8 |issue=2 |page=65 |date=February 1935 |access-date=10 June 2021}}</ref>*'''5R4-G''' ([[Bakelite]] base), '''5R4-GY''', '''5R4-GYA''', '''5R4-GYB''' (''Micanol''<ref name="Micanol" /> base) – 2.8 kV, 2×325 mA Full-wave rectifier, 5-pin Octal base; avionics versions: 5R4-WGA and 5R4-WGB::*'''6L6-GAY''' – 6L6-GA with a [[Dielectric loss|low loss]] [[mica]]-filled [[Phenol formaldehyde resin|phenolic resin]] ("Micanol")<ref name="Micanol" /> base for improved RF performance::*'''6L6-WGA/5932''' – Ruggedized version of 6L6-GA*'''6SJ7''' ([[Bakelite]] base), '''6SJ7Y''' (''Micanol'' base) – Sharp-cutoff RF pentode, Octal base, suppressor grid on a separate pin, control grid on pin 4; similar to types 1603, 77 and U6A-based type 6C6 (control grid on top cap)*'''3B24''' – 20 kV, 60 mA<sub>avg</sub>, 300 mA<sub>peak</sub> Half-wave rectifier; ruggedized version: 3B24-WA*'''5639''' – Subminiature wideband, sharp-cutoff RF/Video pentode, all-glass round cross-section envelope with 8 wire-ends; ruggedized version: 5639-WA*'''5670''' – Dual triode with separate cathodes up to 800 MHz, noval base; [[avionics]] version: 5670-WA*'''5687''' – Dual triode with separate cathodes, center-tapped 12.6 V/450 mA resp. 6.3 V/900 mA heater, Noval base; [[avionics]] version: 5687-WA*'''5702''' – Subminiature, indirectly heated pentode with the suppressor grid on a separate wire, all-glass elliptical cross-section envelope with 7 long inline wire-ends; ruggedized versions: 5702-WA and 5702-WB*'''5703''' – Subminiature, indirectly heated UHF triode, all-glass round cross-section envelope with 5 long wire-ends; ruggedized versions: 5703-WA and 5703-WB*'''5744''' – Subminiature, indirectly heated UHF triode, all-glass round cross-section envelope with 5 wire-ends; ruggedized version: 5744-WB*'''[[5751]]''' – Low-voltage, low-noise avionics dual triode with separate cathodes, center-tapped 12.6 V/175 mA resp. 6.3 V/350 mA heater; avionics version: 5751-WA*'''5783''' – Subminiature 86-volts, cold-cathode, glow-discharge voltage-regulator tube, all-glass elliptical cross-section envelope with 3 long inline wire-ends; ruggedized versions: 5783-WA and 5783-WB*'''5784''' – Subminiature, indirectly heated VHF pentode with the suppressor grid on a separate wire, all-glass round cross-section envelope but 7 long wire-ends; ruggedized versions: 5784-WA and 5784-WB*'''5787''' – Subminiature 98-volts, cold-cathode, glow-discharge voltage-regulator tube, all-glass round cross-section envelope with 3 long wire-ends; ruggedized version: 5787-WA*'''[[5814A]]''' – Dual triode, center-tapped 12.6&nbsp;V/175 mA resp. 6.3 V/350 mA heater, no [[Hot cathode#Failure modes|cathode interface/poisoning]] after prolonged periods in [[Cut-off (electronics)#Tubes|cut-off]], Noval base, shock/vibration resistant; industrial/computer-rated version of ''12AU7/ECC82''; avionics versions: 5814-WA and 5814-WB*'''5829-WA''' – Ruggedized, subminiature avionics dual diode, 6.3 V/150 mA heater, all-glass round cross-section envelope with 7 long wire-ends*'''5902/EL71''' – Subminiature shock-proof AF beam power pentode, all-glass round cross-section envelope with 8 long wire-ends; avionics version: 5902-WA*'''6111''', '''6112''' – Subminiature, separate cathodes dual UHF triode, all-glass round cross-section envelope, circular 8-pin/wire-ends base; ruggedized versions: 6111-WA and 6112-WA*'''6159''' – 6146 with a 26.5 V/300 mA heater; ruggedized version: 6159-W/7357*'''6247''' – Subminiature, indirectly heated AF triode, all-glass round cross-section envelope with 8 wire-ends; ruggedized version: 6247-WA*'''6AH6''' – Wideband, sharp-cutoff IF pentode, Miniature 7-pin base; [[avionics]] version: 6AH6-WA*'''6AN5''' – Sharp-cutoff RF/Video pentode, Miniature 7-pin base, no cathode poisoning after prolonged periods in cut-off; ruggedized version: 6AN5WA*'''6AR6''' – Beam power pentode, Octal base; ruggedized version: 6AR6-WA/6098*'''6J4/EC98''' = '''6С2П'''↦'''6S2P''' – UHF triode, Miniature 7-pin base; ruggedized version: 6J4-WA/8532*'''6SU7-GTY''' – 6SL7-GT with a ''Micanol'' base*'''Z523M''' = '''[[#ZM1030|{{color|Green|ZM1030}}]]'''*'''Z5230M''' = '''[[#ZM1032|{{color|Green|ZM1032}}]]'''*'''{{Visible anchor|ZM1030}}''' = '''Z523M''' – ZM1032 with a red contrast filter coating*'''ZM1134''' – <span style="background: black;font: Arial;color: #FF4000"> ''0 1 2 3 4 5 6 7 8 9'' </span> Neon-filled digital indicator tube, 13mmCH side-viewing, right decimal point*'''ZM1185''' – Neon-filled digital indicator tubes, 16mmCH top-viewing, for use in [[elevator]]s::*'''ZM1185A''' (GR1420) – <span style="background: black;font: Arial;color: #FF4000"> ''1 2 3 4 5 6 U K E R'' </span> ({{lang-de|[[Wiktionary:Untergeschoss|'''U'''ntergeschoss]], [[Wiktionary:Keller|'''K'''eller]], [[Wiktionary:Erdgeschoss|'''E'''rdgeschoss]]}} "Basement, Cellar, Ground Floor"):*'''ZM1185B''' – <span style="background: black;font: Arial;color: #FF4000"> ''1 2 3 4 5 6 7 8 E K'' </span>:*'''ZM1185F''' – <span style="background: black;font: Arial;color: #FF4000"> ''0 1 2 3 4 5 U K E R'' </span>*'''ZM1186''' – ZM1188 with a red contrast filter coating*'''ZM1188''' – <span style="background: black;font: Arial;color: #FF4000"> ''0 1 2 3 4 5 6 7 8 9'' </span> Neon-filled digital indicator tube, 15.5mmCH top-viewing, left decimal point, semi-rectangular envelope for close horizontal stacking*'''ZM1237''' – <span style="background: black;font: Arial;color: #FF4000"> ''{{frac|1|8}} {{frac|1|4}} {{frac|3|8}} {{frac|1|2}} {{frac|5|8}} {{frac|3|4}} {{frac|7|8}}'' </span> Neon-filled digital indicator tube, 15.5mmCH upside-down side-viewing*'''ZM1310''' – <span style="background: black;font: Arial;color: #FF4000"> ''0 1 2 3 4 5 6 7 8 9'' </span> Neon-filled digital indicator tube, right decimal point, 12.5mmCH side-viewing*'''ZM1320''' – <span style="background: black;font: Arial;color: #FF4000"> ''0 1 2 3 4 5 6 7 8 9'' </span> Neon-filled digital indicator tube, right decimal point, 12.5mmCH side-viewing*'''ZM1325''' – <span style="background: black;font: Arial;color: #FF4000"> ''0 1 2 3 4 5 6 7 8 9'' </span> Neon-filled digital indicator tube, right decimal point, 9.5mmCH side-viewing*'''15HP22''' – 15" (38 cm) Color CRT, 45° magnetic deflection, P22 [[RGB color model|RGB]], medium-persistence*'''25AP22''' – 25" (64 cm) Color CRT, 90° magnetic deflection, P22 RGB, medium-persistence*'''15''' – Device for [[Photometry (optics)|photometry/spectrometry]]/[[Pyrometer|pyrometry]] applications*'''150UVP''' – 10-stage photomultiplier, Duodecal base*'''6HZ5/6JD5/6JH5''' – ''Compactron'' High voltage beam power triode with a 2nd grid ("beam plate") connected to the cathode (technically a tetrode), U<sub>a</sub>=3.5 kV, I<sub>apeak</sub>=300 mA, P<sub>a</sub>=35 W, U<sub>h-c</sub>=-200...+450 V, used as shunt regulator in color TV receivers*'''[[6SN7]]/ECC32''' (6Н8С↦6N8S, M-OV/GEC B65, Brimar 13D2, ''CV1986'', ''6042'', ''6180'') – Dual medium-μ triode, each section is equivalent to a 6J5, Octal base, used in audio amplifiers, [[Hammond organ]]s, television, and extensively in World War II radar; similar with first grid on top cap: 6F8G; Noval version: 6CG7/6FQ7, later 12AU7 [[File:Commons-logo.svg|16x16px|link=:Commons:Category:6SN7|class=noviewer|alt=]]*'''LL504/18GB5A''' – CRT horizontal deflection output power pentode, Magnoval base; EL504 or PL504 or XL504/13GB5A with a different heater*'''LL802/10LD6''' – CRT cathode drive power pentode for color TV, Noval base; EL802/6LD6 or PL802 with a different heater*'''XCF802/4JW8''' – Triode + pentode for use as reactance and sinewave oscillator in TV receivers, Noval base; ECF802/6JW8, LCF802/6LX8, PCF802/9JW8 or 5JW8 with a different heater*'''XCL86/8GW8''' – AF Triode + AF power pentode, used for audio amplification in European TV receivers; ECL86/6GW8 or PCL86/14GW8 with a different heater*'''XF86''' – Sharp-cutoff AF pentode, also for use in ''[[Dynatron oscillator|Transitron]]'' circuits in TV receivers; [[#EF86|{{color|Green|EF86}}]]/6BK8/6CF8, PF86 or UF86 with a different heater*'''XL504/13GB5A''' – CRT horizontal deflection output power pentode, Magnoval base; EL504 or LL504/18GB5A or PL504 with a different heater*'''1604''' – Remote-cutoff RF/IF pentode, U6A base, control grid on top cap; premium version of type 78<ref name="SibleysTubeLore">Most information regarding 800s and 1600s and cited after radiomuseum.org was sourced from:*{{cite book |last=Sibley |first=Ludwell |year=1996 |title=Tube Lore - A reference for Users and Collectors |edition=1st |publisher=Flemington, NJ, USA: Sibley |isbn=0-9654683-0-5 |lccn=96228498 |oclc=36343553 |ol=627922M}}*{{cite book |last=Sibley |first=Ludwell |year=2018 |title=Tube Lore II - A reference for Users and Collectors |edition=2nd |publisher=Flemington, NJ, USA: Sibley |isbn=978-1-53-237631-3}}</ref><ref>[https://www.radiomuseum.org/tubes/tube_1604.html 1604 on radiomuseum.org]</ref>*'''1605''' – Directly heated triode, 1.25 V/100 mA filament<ref>[https://www.radiomuseum.org/tubes/tube_1605.html 1605 on radiomuseum.org]</ref>*'''1606''' – Directly heated pentode, 1.25 V/100 mA filament<ref>[https://www.radiomuseum.org/tubes/tube_1606.html 1606 on radiomuseum.org]</ref>*'''1607''' – Directly heated power triode, 2.5 V/2.5 A filament, UX4 base; similar to type 2A3<ref>[https://www.radiomuseum.org/tubes/tube_1607_rca.html 1607 on radiomuseum.org]</ref>*'''1615''' – Indirectly heated pentode, 6.3 V/700 mA heater, U6A base; premium version of type type 42<ref>[https://www.radiomuseum.org/tubes/tube_1615.html 1615 on radiomuseum.org]</ref>*'''1617''' – Pentode, 6.3 V heater, U6A base<ref>[https://www.radiomuseum.org/tubes/tube_1617.html 1617 on radiomuseum.org]</ref>*'''1627''' – Directly heated power triode, U4J Jumbo base with anode on top cap and control grid on side cap; 810 with a 5 V/9 A heater<ref>[https://www.radiomuseum.org/tubes/tube_1627.html 1627 on radiomuseum.org]</ref>*'''1628''' = '''VT140''' – 500 MHz, 40 W Directly heated UHF power triode, [[Tantalum]] anode, center-tapped 3.5 V/3.25 A thoriated Tungsten filament<ref>[https://www.radiomuseum.org/tubes/tube_1628.html 1628 on radiomuseum.org]</ref>*'''1637''' = '''EL32''' – Power pentode, Octal base, RCA production to support the British government via [[United States Army Signal Corps|US Signal Corps]] during World War II<ref>[https://www.radiomuseum.org/tubes/tube_1637.html 1637 on radiomuseum.org]</ref>*'''1638''' = '''EB34''' – Separate cathodes dual diode, Octal base, RCA production for the British government<ref>[https://www.radiomuseum.org/tubes/tube_1638.html 1638 on radiomuseum.org]</ref>*'''1639''' = '''EBC33''' – Common cathode dual diode + AF triode, Octal base, RCA production for the British government<ref>[https://www.radiomuseum.org/tubes/tube_1639.html 1639 on radiomuseum.org]</ref>*'''1641''' – Directly heated full-wave rectifier, UX4 base with both anodes on top caps; similar to 596<ref>[https://www.radiomuseum.org/tubes/tube_1641.html 1641 on radiomuseum.org]</ref>*'''1645''' – Phototube, spectral S4 response; similar to 5652<ref>[https://www.radiomuseum.org/tubes/tube_1645.html 1645 on radiomuseum.org]</ref>*'''1649''' (6AC7W) – Indirectly heated pentode, 6.3 V/450 mA heater, Octal base; premium version of type 6AC7<ref>[https://www.radiomuseum.org/tubes/tube_1649.html 1649 on radiomuseum.org]</ref>*'''1651''' = '''UV218''' – 50 kV, 750 mA Half-wave rectifier, 3-pin base with anode on top cap<ref>[https://www.radiomuseum.org/tubes/tube_1651.html 1651 on radiomuseum.org]</ref>*'''1655''' – Common cathode dual high-μ AF triode, Octal base; premium version of type 6SC7<ref>[https://www.radiomuseum.org/tubes/tube_1655.html 1655 on radiomuseum.org]</ref>*'''1659''' – Dual diode + high-μ triode; selected 2A6 for use in [[Q meter|''Boonton'' Q meters]] - then further selected and assigned 535A or 535B for their ''260-A'' meter<ref>[https://www.radiomuseum.org/tubes/tube_1659.html 1659 on radiomuseum.org]</ref>*'''1664''' – Dual diode + semiremote-cutoff pentode; premium version of 12C8<ref>[https://www.radiomuseum.org/tubes/tube_1664.html 1664 on radiomuseum.org]</ref>*'''1677''' = '''25L6GT Code M-34''' – Beam power tetrode; 25L6-GT with a custom-designed screen grid, and further selected by exclusive customer {{Tooltip|''Bristol Co.''|Bristol Co., Waterbury, Connecticut, USA}} for their [[industrial furnace]]-control equipment; rejects were returned and sold off as regular 25L6-GT<ref>[https://www.radiomuseum.org/tubes/tube_1677.html 1677 on radiomuseum.org]</ref>*'''1679''' – Common cathode dual triode, sold exclusively to [[IBM]] for their computers; 6J6/ECC91 selected for improved cutoff and high zero-bias anode current; rejects were sold off as regular 6J6; superseded by type 1684<ref>[https://www.radiomuseum.org/tubes/tube_1679.html 1679 on radiomuseum.org]</ref>*'''1681''' – Beam power tetrode, sold exclusively to IBM for their computers; 6AQ5/EL90 with a custom-designed control grid, no cathode poisoning after prolonged periods in cut-off, and further selected for cutoff and zero-bias anode current; rejects were sold off as regular 6AQ5<ref>[https://www.radiomuseum.org/tubes/tube_1681.html 1681 on radiomuseum.org]</ref>*'''1682''' – Common cathode dual triode, sold exclusively to US Air Force, [[Sperry Corporation|Sperry Gyroscope Co.]], and [[Western Electric|WE]], for use in radar and computer equipment aboard [[Convair B-36 Peacemaker|B-36 aircraft]]; 6J6 selected for balance between sections after aging; superseded by type 6099<ref>[https://www.radiomuseum.org/tubes/tube_1682.html 1682 on radiomuseum.org]</ref>*'''1684''' – Common cathode dual medium-μ triode, sold exclusively to IBM for their computers; 1679 with a 300 mA heater; superseded by types 5844 and 6211 (separate cathodes<ref>[https://www.radiomuseum.org/tubes/tube_1684.html 1684 on radiomuseum.org]</ref>)*'''822''' – Directly heated power triode, 10 V/4 A filament, anode on top cap<ref name="SibleysTubeLore" /><ref>[https://www.radiomuseum.org/tubes/tube_822_usa.html 822 on radiomuseum.org]</ref>*'''839''' – Sharp-cutoff VHF tetrode, control grid on top cap; 24-A with a tubular envelope and a [[Dielectric loss|low loss]] ''[[Steatite|Isolantite]]'' UY5 base, custom-designed exclusively for Hawaiian [[Hawaiian Telcom|Mutual Telephone Company]] for use in inter-island radio links<ref>[https://www.radiomuseum.org/tubes/tube_839_rca.html 839 on radiomuseum.org]</ref>*'''840''' – Directly heated RF/IF pentode, UY5 base, anode on top cap<ref>[https://www.radiomuseum.org/tubes/tube_840.html 840 on radiomuseum.org]</ref>*'''847''' – Air-cooled, directly heated RF power triode, 11 V/14.75 A filament; UV206 with a lower [[Gain (electronics)|μ]] of 4.4<ref>[https://www.radiomuseum.org/tubes/tube_847.html 847 on radiomuseum.org]</ref>*'''848''' – Air-cooled, directly heated RF power triode, 22 V/52 A filament; UV207 with a lower μ of 8<ref>[https://www.radiomuseum.org/tubes/tube_848.html 848 on radiomuseum.org]</ref>*'''853''' – Indirectly heated power pentode, Octal base<ref>[https://www.radiomuseum.org/tubes/tube_853.html 853 on radiomuseum.org]</ref>*'''854''' – Air-cooled, directly heated RF power triode, anode on top cap, 14.5 V/52 A filament; similar to UV207<ref>[https://www.radiomuseum.org/tubes/tube_854.html 854 on radiomuseum.org]</ref>*'''855''' – Air-cooled, directly heated half-wave vacuum rectifier, anode on top cap; 854 without the control grid<ref>[https://www.radiomuseum.org/tubes/tube_855.html 855 on radiomuseum.org]</ref>*'''856''' – Air-cooled, directly heated half-wave vacuum rectifier, anode on top cap<ref>[https://www.radiomuseum.org/tubes/tube_856.html 856 on radiomuseum.org]</ref>*'''871''' – Mercury-vapor rectifier with a peak inverse voltage of 5 kV and average anode current 125 mA, 2.5 V/2 A heater, 4-pin base with anode on top cap<ref>[https://www.radiomuseum.org/tubes/tube_871.html 871 on radiomuseum.org]</ref>*'''875''' – Mercury-vapor rectifier with a peak inverse voltage of 15 kV and average anode current 1.5 A, 5 V/12.5 A heater, B4D Superjumbo base with anode on top cap<ref>[https://www.radiomuseum.org/tubes/tube_875.html 875 on radiomuseum.org]</ref>*'''895''' – Water-cooled power triode with 3 Y-connected 139 A (each) filaments for 3-phase operation in broadcast/industrial applications<ref>[https://www.radiomuseum.org/tubes/tube_895.html 895 on radiomuseum.org]</ref># Types for mass-produced radio and TV receivers designed to run on either AC or DC mains power ([[AC/DC receiver design#Series tube heaters|ac/dc]]) with no mains transformer; they are always indirectly heated and all heaters are connected in series across the mains power supply, possibly with an additional ballast resistor or [[Iron–hydrogen resistor|barretter]] chosen such that the sum of the heater and ballast voltages equals the mains voltage. Some power tubes have a heater tap near one end to feed a small pilot lamp, thus shunting away from it the heater current surge when powering up.<ref>http://www.r-type.org/addtext/add144.htm Longer Life for Dial Lamps - A new rectifier for American midgets</ref><br />All tubes must be rated at the same heater current such as [[#V - 50 mA heater|{{color|Green|50}}]], [[#100 mA series heater tubes|{{color|Green|100}}]], [[#150 mA series heater tubes|{{color|Green|150}}]], [[#C - 200 mA heater|{{color|Green|200}}]], [[#300 mA series heater tubes|{{color|Green|300}}]], [[#450 mA series heater tubes|{{color|Green|450}}]] or [[#600 mA series heater tubes|{{color|Green|600}}]] mA, depending on mains voltage and device tube count, have a comparable warm-up time, and the heater/cathode insulation has to withstand the high voltage at the top of a series heater string (which some tubes intended for parallel heater operation can't; if a heater further down the string breaks, they even have to withstand the full mains voltage).Some tubes feature a center-tapped filament/heater, providing:#Two voltage/current options by {{Tooltip|series|heater supply to filament ends, tap unconnected}} resp. {{Tooltip|parallel|heater supply to filament tap and to both ends connected together}} wiring of their two heater sections, e.g. 2×6.3 V/150 mA (series) resp. 6.3 V/2×150 mA (parallel) ([[#12V_CT|{{color|Green|examples}}]]), or#A defined cathode current return path and reference point for directly heated tubes where signal ground, and an internal shield and/or a suppressor grid if present, are connected to; this is the only allowed use for many directly heated high-power RF tubes since their center-tap can't carry the huge heater current, except with 2-phase heater tubes====={{anchor|MOPT}}Power tubes=====Letter(s): Type [[acronym]]<ref>{{cite web |url=https://lampes-et-tubes.info/doc/marconi.php?l=e |title=MARCONI Transmitting and Power Rectifying Valves |year=1936 |access-date=4 December 2022}}</ref>*'''ACM''' – '''A'''ir (convection/radiation) '''c'''ooled '''m'''odulating AF triode*'''ACPT''' – '''A'''ir '''c'''ooled '''p'''entode for '''t'''ransmitters*'''ACS''' – '''A'''ir '''c'''ooled ('''s'''creen grid) tetrode*'''ACT''' – '''A'''ir '''c'''ooled '''t'''riode*'''BES''' – '''B'''right '''e'''mitter ('''s'''creen grid) tetrode*'''CAM''' – Liquid-'''c'''ooled '''a'''node '''m'''odulating AF triode*'''CAR''' – Liquid-'''c'''ooled '''a'''node '''r'''ectifier*'''CAT''' – Liquid-'''c'''ooled '''a'''node RF '''t'''riode*'''DA''' – Air cooled, modulating '''A'''F triode*'''DEM''' – '''D'''ull '''e'''mitter '''m'''odulating AF triode*'''DES''' – '''D'''ull '''e'''mitter ('''s'''creen grid) RF tetrode*'''DET''' – '''D'''ull '''e'''mitter RF '''t'''riode*'''EHT''' – High-vacuum '''[[High voltage|EHT]]''' rectifier*'''GT''' – Thyratron*'''GU''' – Mercury-vapor rectifier*'''GXU''' – Xenon-filled rectifier*'''MR''' – High-vacuum '''r'''ectifier*'''MT''', '''T''' – '''T'''riode*'''TT''' – '''T'''ransmitting '''t'''etrodeNumber: Sequentially assigned'''Examples:''':*'''1R5-SF''' = '''1AQ5''' – 1R5/DK91 with a 25 mA filament:*'''1T4-SF''' = '''1AM4''' – 1T4/DF91 with a 25 mA filament*'''1U5/DAF92''' – AM detector diode + AF pentode, 50 mA filament, Miniature 7-pin base:*'''1U5-SF''' = '''1AS5''' – 1U5/DAF92 with a 25 mA filament*'''6AG5/EF96''' = '''6Ж3П'''↦'''6J3P''' – Sharp-cutoff VHF pentode up to 400 MHz, Miniature 7-pin base*'''9AU7''' – 7AU7/XCC82 Dual triode with a center-tapped 225 mA/9.4 V resp. 450 mA/4.7 V heater*'''5696/EN92''' – 500 V, 25 mA<sub>avg</sub>, 100 mA<sub>peak</sub>, 2 A<sub>surge</sub> Xenon-filled tetrode thyratron, negative starter voltage, Miniature 7-pin base, for industrial control*'''7241''', '''7242''' – Triple-cathode power triodes, designed for high-reliability cathode follower series voltage regulator applications where the cathode is split into 3 sections connected together via balancing resistors to equalize the emission along the cathode*'''YD1060''' = '''8412''' – Indirectly heated ''disk-seal'' ceramic/metal UHF power triode up to 30 W, 7 GHz*'''YD1070''' = '''8413''' – Indirectly heated ''disk-seal'' ceramic/metal UHF power triode up to 25 W, 7 GHz*'''YD1185''' = '''8935''' – 100 MHz, 15 kW Forced-air cooled RF power triode*'''YD1187''' = '''8936''' – 100 MHz, 20 kW Water jacket-cooled RF power triode*'''YL1420''' = '''8812''' – 260 MHz, 11 kW Forced-air cooled, ceramic/metal, coaxial, linear VHF power tetrode, 6.3 V/120 A heater*'''YL1430''' = '''8813''' – 260 MHz, 18 kW Forced-air cooled, ceramic/metal, coaxial, linear VHF power tetrode, 8 V/120 A heater*'''YL1440''' = '''8814''' – 260 MHz, 2.4 kW Forced-air cooled, ceramic/metal, coaxial, linear VHF power tetrode, 4.2 V/53 A heater*'''YL1520''' = '''8915''' – 260 MHz, 25 kW Forced-air cooled, ceramic/metal, coaxial, linear VHF power tetrode, 11.5 V/120 A heater*'''ZT1020''' – 500 V, 25 mA<sub>avg</sub>, 100 mA<sub>peak</sub>, 2 A<sub<surge</sub> Xenon-filled tetrode thyratron, negative starter voltage, Miniature 7-pin base; impulse resistant, long-life version of 5696/EN92*'''QBL5/4000''' (7704) – Forced-air cooled 4 kW beam power tetrode*'''TBL2/400''' (8119) – 2 kV, 400 W Forced-air cooled power triode# Types for equipment designed to run on either AC or DC mains power ([[AC/DC receiver design#Series tube heaters|ac/dc]]) with no mains transformer; they are always indirectly heated and all heaters are connected in series across the mains power supply, possibly with an additional [[Iron–hydrogen resistor|barretter]] or power resistor chosen so that the sum of the heater and ballast voltages equals the mains voltage. All tubes must be rated at the same heater current such as [[#V - 50 mA heater|{{color|Green|50}}]], [[#100 mA series heater tubes|{{color|Green|100}}]], [[#150 mA series heater tubes|{{color|Green|150}}]], [[#C - 200 mA heater|{{color|Green|200}}]], [[#300 mA series heater tubes|{{color|Green|300}}]], [[#450 mA series heater tubes|{{color|Green|450}}]] or [[#600 mA series heater tubes|{{color|Green|600}}]] mA, depending on mains voltage and device tube count, have a comparable warm-up time, and the heater/cathode insulation has to withstand the high voltage at the top of a series heater string (which some tubes intended for parallel heater operation can't; if a heater further down the string breaks, they even have to withstand the full mains voltage).{| class="wikitable floatright" style="text-align: center;"|+ Typical parallel and series heater ratings! P/I !! 150mA !! 300mA !! 450mA !! 600mA|-! 945mW| '''6.3V''' || 3.15V || 2.1V || 1.575V|-! 1.89W| '''12.6V''' || '''6.3V''' || 4.2V || 3.15V|-! 2.835W| 18.9V || 9.45V || '''6.3V''' || 4.725V|-! 3.78W| 25.2V || '''12.6V''' || 8.4V || '''6.3V'''|}:*'''MG''' – Metal-glass tube, a glass envelope hidden inside a tightly fitting metal jacket to make it look like a metal envelope:*'''L''' – 450 mA AC/DC series heater; was shifted here from Y around 1961 after the risk of confusing with Luftwaffe tubes had subsided:*'''R''' – Not assigned to avoid any confusion with the older [http://www.radiodoctor.de/files/roehren_numbering.htm Telefunken "R" system or with German army tubes]*'''R''' – Telefunken "R" system legacy rectifier::*'''RG''', '''RGQ''' – Half-wave Mercury-vapor rectifier ({{lang-de|[[Wiktionary:Röhre|'''R'''öhre]]-[[Wiktionary:Gleichrichter|'''G'''leichrichter]]-[[Wiktionary:Quecksilber|'''Q'''uecksilber]]}} "Tube-Rectifier-Mercury"):*'''RGQZ''' – Full-wave Mercury-vapor rectifier ({{lang-de|'''z'''weiweg |links=no}} "two-way"):*'''RR''' – Rare-gas filled half-wave rectifier:*'''RSQ''' – Grid controlled half-wave Mercury-vapor rectifier ({{lang-de|[[Wiktionary:steuerbar|'''s'''teuerbar]] |links=no}} "controllable"):*'''RY''' – Vacuum half-wave rectifier*'''6B5''' (U6A base), '''6N6G''' (Octal base) – ''[[Triple-twin|Triple-Twin]]'' AF signal + 4-Watts ''zero bias'' power triode, internally connected as a cathode follower like today's [[Darlington transistor]]s; cf. 295, 2B6, 6AC6*'''{{Visible anchor|6BN6/6KS6}}''' = '''6А3П'''↦'''6A3P''' – ''Gated-beam discriminator'' pentode, used in radar, dual channel oscilloscopes and [[Detector (radio)#Quadrature detector|FM quadrature demodulator]]s where the suppressor grid is connected to ground via an LC tank circuit tuned for a 90° phase lag to the IF at center frequency;<ref>{{cite conference |url=http://www.mcmlv.org/Archive/TubeTheory/Adler%20&%20Haase%201949%20The%206BN6%20Gated%20Beam%20Tube.pdf |first1=Dr. Robert |last1=Adler |author-link1=Robert Adler |first2=Allen P. |last2=Haase |title=The 6BN6 Gated Beam tube |book-title=Proceedings of the National Electronics Conference |volume=5 |publisher=National Engineering Conference, Incorporated |date=September 1949 |pages=408–426 |access-date=17 June 2021 |archive-url=https://web.archive.org/web/20220131085041/http://www.mcmlv.org/Archive/TubeTheory/Adler%20&%20Haase%201949%20The%206BN6%20Gated%20Beam%20Tube.pdf |archive-date=2022-01-31 |url-status=dead}}</ref> precursor of the [[Nonode]] approach; 3BN6, 4BN6, 12BN6 with a different heater*'''{{Visible anchor|6C6}}''' (U6A base), '''6J7-G/EF37''' (Octal base) – Sharp-cutoff RF pentode, suppressor grid on a separate pin, control grid on top cap for use as tuned RF amplifier or biased detector or AF amplifier, also used in test equipment; based on type 57, which had a 2.5 volt heater; similar to types 1603, 77 and Octal type 6SJ7 (control grid connection on pin 4)*'''6CL6''' – CRT cathode drive power pentode*'''{{Visible anchor|6D6}}''' (U6A base), '''6U7-G''' (Octal base) – Remote-cutoff RF pentode, suppressor grid on a separate pin, control grid on top cap, for use as an IF amplifier or as a mixer, also used in test equipment; based on type 58, which had a 2.5 volt heater; similar to types 78, 6K7/EF39 and 6SK7 (control grid connection on pin 4)*'''6D8-G''' – Heptode [[pentagrid converter]], Octal base with #4 control grid on top cap, 150 mA heater, used in pre-war 6-volt [[Antique radio#Farm radios|farm radios]]; similar to type 6A8:*'''6DQ6-B/6GW6''' – 6DQ6 with higher ratings and a higher zero-bias anode current*'''6DX8/ECL84''' = '''6Ф4П'''↦'''6F4P''' – TV sync sep triode + CRT cathode drive power pentode*'''6EZ8''' – Triple high-μ VHF triode for use in FM tuners, Noval base, cathodes 1 and 2 and one side of the heater share pin 4*'''6F7''' (U7A base), '''6P7-G''' (Octal base) – Common-cathode, remote-cutoff pentode + medium-μ triode with the pentode control grid on top cap, for use as triode/pentode mixer/oscillator, or as combination IF amplifier (pentode) and AM detector or AF amplifier (triode)*'''6GY8''' – Triple high-μ VHF triode for use as [[Autodyne]] or [[Automatic frequency control|AFC]] circuit in FM tuners, Noval base, cathode 3, control grid 1 and one side of the heater share pin 4*'''6HS8 – See [[#6BU8|{{color|Green|6BU8}}]]*'''6J9''' – Triple VHF triode for use as [[Autodyne]] mixer in FM tuners, B10G Decar base (=Noval plus center pin 10 for cathodes 1 and 2)*'''6S7-G''' – Remote-cutoff RF pentode, Octal base with control grid on top cap, 150 mA heater, used in pre-war 6-volt [[Antique radio#Farm radios|farm radios]]; similar to type 6K7*'''6T7-G''' – Dual diode + high-μ triode, Octal base with control grid on top cap, 150 mA heater, used in pre-war [[Antique radio#Farm radios|farm radios]]; similar to type 6Q7*'''12DT6''' – [[Detector (radio)#Quadrature detector|Quadrature demodulator]] pentode used in FM audio demodulators; 6DT6 with a different heater, cf. 6BN6, [[Nonode]]*'''25B5''' (U6A base), '''25N6G''' (Octal base) – ''[[Triple-twin|Triple-Twin]]'' AF signal + 4-Watts ''zero bias'' power triode, internally connected as a cathode follower like today's [[Darlington transistor]]s; 6B5 resp. 6N6G with a different heater*'''ZC1030''' – 4 mA, Gas-filled, cold-cathode trigger tetrode, one starter and a primer, positive starter voltage, all-glass with 4 wire-ends, for use in high-speed counting and switching circuits<ref name="Amperex1966">{{cite web |url=https://frank.pocnet.net/other/Amperex/Amperex_Vol3_SpecialPurposeTubes.pdf |title=Special purpose tube manual (194MB) |publisher=[[Amperex Electronic|Amperex]] |year=1966 |access-date=1 November 2022}}</ref>{{rp|719ff}}*'''ZC1031''' – 3 mA, Neon-filled, cold-cathode, luminescent trigger tetrode, one starter and a primer, 0.0018 [[Foot-candle|ft-c]] (19.368 [[Lux|mlx]]) light output for use as self-displaying [[shift register]] cells in large-format, crawling-text [[dot-matrix display]]s, all-glass wire-ended<ref name="Amperex1966" />{{rp|725ff}}===='''RGQZ'''====*'''RGQZ1.4/0.4''' – 1.4 kV, 400 mA Full-wave Mercury-vapor rectifier===='''RSQ'''====*'''RSQ7.5/0.6''' – 7.5 kV, 600 mA Grid-controlled, half-wave Mercury-vapor rectifier with anode on top cap*'''RSQ15/40''' – 15 kV, 40 A Grid-controlled, half-wave Mercury-vapor rectifier with anode on top cap—Some manufacturers simply appended the letter '''S''' to the standard typecode (EF804 → EF804S)====[[British Valve Association|BVA]] code====Little is known about this code other than that [[British Valve Association|BVA]] members such as [[#Cossor system|{{color|Green|Cossor}}]], [[#BritishMazda|{{color|Green|EdiSwan}}]] and [[#MOST|{{color|Green|M-OV/GEC}}]] based their early designation systems on it*'''B''' – Dual triode*'''D''' – Diode*'''H''' – High-μ/high-impedance signal triode*'''HL''' – Medium-μ/medium-impedance signal triode*'''L''' – Low-μ/low-impedance signal triode*'''P''' – Power tube*'''S''' – Screen-grid tube (tetrode or pentode)*'''U''' – Rectifier*A number ("prefix") with up to 3 digits indicating the heater voltage [[Rounding#Round half down|rounded ''.6 down'']] to the nearest whole number; '''0''' indicates a [[Cold cathode#Cold-cathode devices|cold-cathode tube]]. Tubes with a center-tapped filament/heater are assigned the higher voltage option<br />Exceptions include [[#2 volt DC filament tubes|{{color|Green|2 volts DC filament tubes}}]]; [[#450 mA series heater tubes|{{color|Green|5-prefix series heater tubes}}]], which go up to 5.9 volts (5U9/LCF201, 5X9/LCF200) to avoid cluttering the 6-prefix; [[#7 prefix - Loctal tubes|{{color|Green|7-prefix}}]] and [[#14 prefix - Loctal tubes|{{color|Green|14-prefix Loctal tubes}}]]; 11.6-volts 10GV8/LCL85<ref name="DecoderLinks" />*Up to 2 sequentially assigned letters, skipping the letters I and O. After the single letters were exhausted, combinations like AB, AC, AD, AE... were used, avoiding same-letter repetitions and reserving those ending in '''P''' for CRTs ([[#RETMA_CRT|{{color|Green|see below}}]])<br />Wherever possible, tubes that differed only in the heater ratings had the same letters; exceptions include: the 12BR7 and 9BR7 are unrelated to the 6BR7; the 4BL8/XCF80 is the 4.6 V/600 mA series heater version of the 6BL8/ECF80, but the 450mA series heater version is the 6LN8/LCF80 rather than 6BL8. The change of letters was required because the 6LN8 is 6.0 volts while the 6BL8 is 6.3 volts*A number with up to 2 digits indicating the count of active elements in the tube, including any shield and the heater in indirectly heated tubes – internally connected elements count as one; the use is somewhat arbitrary::*'''1''' – Directly heated half-wave rectifier; [[Electrical ballast#Self-variable resistors|ballast tube]]/resistor; [[Iron–hydrogen resistor|barretter]]:*'''2''' – Half-wave rectifier; ballast tube with a lockout jumper; barretter with a filament tap for pilot lamp(s):*'''3''' – Rectifier; directly heated triode:*'''4''' – Rectifier; directly or indirectly heated triode or pentode; indirectly heated triode [[thyratron]]:*'''5''' – Indirectly heated full-wave rectifier; separate cathodes dual diode; triode; tetrode; ''Shadow-Grid'' beam pentode/hexode; ''[[Triple-twin|Triple-Twin]]''; [[Magic eye tube|tuning indicator]]; indirectly heated triode thyratron:*'''6''' – Separate cathodes dual rectifier; tetrode; pentode; heptode (''[[pentagrid converter]]''); common cathode dual triode; common cathode dual diode + triode; separate cathodes dual diode; common cathode quad diode; tuning indicator; ''Triple-Twin''; [[Sutton tube|Reflex Klystron]]:*'''7''' – Separate cathodes dual rectifier with a heater tap for a pilot lamp; pentode; heptode; Nonode; triode/hexode mixer; dual triode; common cathode triode + pentode; dual diode + pentode; dual diode + triode; diode + split-anode tetrode; common cathode dual pentode; separate cathodes triple diode; common cathode quad diode; tuning indicator:*'''8''' – Heptode; octode; triode/hexode mixer; dual or triple diode + triode; common cathode (dual) diode + pentode; separate cathodes dual triode; separate cathodes triode + tetrode; triple triode; diode + three-anode tetrode; split-anode pentode; triode + pentode; quad diode; common cathode sextuple diode; [[beam deflection tube]]:*'''9''' – Separate cathodes dual diode + pentode; separate cathodes triode + pentode; common cathode dual triode + pentode; triple triode; separate cathodes dual pentode:*'''10''' – Separate cathodes triple triode; separate cathodes dual pentode; dual diode + dual triode:*'''11''' – Separate cathodes dual triode + pentode; separate cathodes triode + dual pentode; separate cathodes dual diode + dual triode; separate cathodes dual pentode:Exceptions include the 6L6-G/GT, 12L6-GT, 25L6-G/GT, 35L6-GT and 50L6-GT with a glass envelope and 5 elements, but legacy-named after the original 6L6 and 25L6 with a metal envelope connected to pin 1, making the sixth element*'''5HC7''' – ''[[Compactron]]'' Dual dissimilar triode for use as sync clipper and AGC amplifier; 4HC7 with a 5.6 V heater*'''6AC6''' – ''Triple-Twin'' AF signal + ''zero bias'' power triode with a common, single anode, internally connected as a cathode follower*'''6BA11''' – ''Compactron'' Triode + split-anode pentode for use as TV vertical deflection oscillator and [[Analog television#Sync separator|sync sep]]*'''6BC7''' – Separate cathodes triple diode*'''6BU8/6GS8''', '''6HS8''', '''6LE8''', '''6MK8''' – Split-anode pentode for use as TV [[Analog television#Sync separator|sync sep]] and [[Automatic gain control|AGC]] amplifier*'''6J9''' – Triple triode*'''6JU8A''' – 9 mA Quad diode, units 1&2 and 3&4 internally series-connected, for use in [[FM broadcasting#Stereo FM|FM-stereo demuxers]] or in phase detectors*'''12AH7GT''' = '''12Н11С'''↦'''12N11S''' – Dual medium-μ triode, 12.6 V/150 mA heater*'''12L6GT''' – Beam power tetrode, 6W6GT, 25L6GT or 50L6GT with a different heater*'''DK97''' – Heptode pentagrid converter, Miniature 7-pin base, 1.4 V/25 mA filament*'''EC1010''' (6С53Н↦6S53N) – ''Nuvistor'' ceramic/metal UHF triode*'''ECC802''' – Separate cathodes dual triode, Noval base*'''ECC803''' – Separate cathodes dual triode, Noval base*'''E86CC/6463''' – Separate cathodes dual triode for computer circuits, heaters internally series-connected, with the midpoint on a separate pin, Noval base*'''E81CH''' – Triode/remote-cutoff heptode mixer, Noval base*'''ED100''' – Power triode for use in telephone equipment, O5A European 5-pin base*'''EDD11''', '''EDD111''' – Dual power triode, Y8A ''steel tube'' base*'''EF761''' – Subminiature remote-cutoff RF/IF pentode, all-glass round cross-section envelope, circular 8-pin/wire-ends base*'''E85F''' (EF805S) – Remote-cutoff RF/IF Pentode*'''EH11''' – Heptode; superseded by ECH11*'''EH900''' – Dual-control switching heptode designed for high speed digital computers*'''EH900S/5915''' = '''EH960''' – Dual-control switching heptode, designed for high speed digital computers, no [[Hot cathode#Failure modes|cathode interface/poisoning]] after prolonged periods in [[Cut-off (electronics)#Tubes|cut-off]]*'''EL88''' – 2.6 W AF power pentode*'''EL89''' – 3.9 W AF power pentode*'''EL150''' – Power pentode, Y8A ''steel tube'' base*'''EL503/8278''', '''EL506''' – AF power pentode, Magnoval base*'''EL520''' – AF beam power tetrode, Magnoval base*'''EL803S''' – Wideband power pentode*'''EY86/6S2''', '''EY806''' – 24 kV, 800 µA Half-indirectly heated CRT EHT rectifier, anode on top cap; [[#DY86|{{color|Green|DY86}}]]/1S2 or GY86 with a different heater*'''EY87/6S2A''', '''EY807''' – [[#DY87|{{color|Green|DY87}}]]/1S2A with a different heater; EY86 with a [[Silicone rubber|silicone]]-coated envelope to prevent [[Electrical breakdown|flush-over]] in high-humidity and low atmospheric-pressure conditions*'''EZ82''' – EZ80/6V4 with the diodes vertically stacked instead of side-by-side*'''GA8600''' – Directly heated, thermally-limited diode, 1.9 V/1.55 A filament, all-glass, Noval base*'''GY521''' – CRT EHT rectifier, Magnoval base with anode on top cap*'''GZ31/5U4G''' = '''5Ц3С'''↦'''5C3S''' – 1.55 kV, 2×675 mA Full-wave rectifier, 5-pin Octal base*'''LCF200/5X9''' – Triode + pentode for use as IF amplifier in TV receivers, Decal base; ECF200/6X9 or PCF200/8X9 with a different heater*'''LCL82/11BM8''' – AF triode + AF power pentode; [[#ECL82|{{color|Green|ECL82/6BM8}}]], PCL82/16A8, UCL82/50BM8 or XCL82/8B8 with a different heater*'''LL509/26KG6A''' – EL509/6KG6A or PL509/40KG6A with a different heater*'''LL521/21KQ6''' – CRT horizontal deflection output power pentode, Magnoval base; PL521/29KQ6 with a different heater*'''PCF84''' – Triode + pentode*'''PCF810''' – Triode + pentode*'''PCL501''' – Triode + power pentode, Magnoval base*'''UM83''' – Side-view, "Magic [[Weighing scale|Balance]]" band-type dual-channel tuning/level indicator, two DC amplifier triodes and one electron gun for two separate screen anodes, Noval B9A base; EM83 with a different heater*'''4X150A/7034''' = '''QEL1/150''' – Forced-air cooled 150 W beam power tetrode:A leading '''0''' means a voltage below 1 kV, the following digit(s) then being the [[fractional part]]*'''150TV''' – Vacuum photometric cell, blue sensitive*'''60DVP''', '''60DVP/H''' (with plano-concave glass adaptor) – 12-stage photomultiplier for scintillation counters1AD4, 1AG4, 1AG5, 1AK4 and 1AK5 pentodes have a split suppressor grid, its halves connected to the positive resp. negative filament end*'''6AT6/EBC90''' – Common cathode dual diode + high-μ AF triode for use in FM ratio detectors, triode μ = 70; 6Q7 with a Miniature 7-pin base*'''6AV6/EBC91''' – Common cathode dual diode + high-μ AF triode for use in FM ratio detectors, triode μ = 100 (triode section similar in characteristics to one half of a 12AX7/ECC83); Miniature 7-pin version of type 75*'''5678''' – Subminiature, directly heated, shielded RF pentode with a split suppressor grid, its halves connected to the positive resp. negative 1.25 V/50 mA filament end, all-glass elliptical cross-section envelope with 5 long inline wire-ends*'''5691''' – ''Special Red'' ruggedized long-life dual high-μ triode; industrial version of the 6SL7GT*'''5692''' – ''Special Red'' ruggedized long-life dual medium-μ triode; industrial version of the 6SN7GT*'''5693''' – ''Special Red'' ruggedized long-life sharp-cutoff pentode; industrial version of the 6SJ7*'''6042''' (25 V/150 mA heater), '''6180''' (6.3 V/600 mA heater) – Separate cathodes dual triodes, Octal base; derived from the 6SN7*'''7034''' = '''QEL1/150''' = Eimac '''4X150A''' – Forced-air cooled 150 W beam power tetrode'''Note:''' DF60, DF61, DF62, DF63 and DF703 have a split suppressor grid, its halves connected to the positive resp. negative filament end*'''DF97/1AN5''' – Remote-cutoff RF/IF/mixer pentode with the suppressor grid on a separate pin, Miniature 7-pin base, 1.4 V/25 mA filament*'''EBC3''' – Common cathode dual diode + AF triode, side-contact 8 base with triode grid on top cap*'''EBC11''' – Common cathode dual diode + AF triode, Y8A ''steel tube'' base*'''EBC33''' (6Q7G) – Common cathode dual diode + AF triode; EBC3 with an Octal base*'''EBC41/6CV7''' – Shielded common cathode dual diode + AF triode; UBC41 with a different heater; EBC81/6BD7A with a Rimlock base*'''EBC81/6BD7A''' – Shielded common cathode dual diode + AF triode; UBC81 with a different heater; EBC41 with a Noval base*'''EBC90/6AT6''' – Common cathode dual diode + high-μ AF triode for use in FM ratio detectors, triode μ = 70, Miniature 7-pin base; HBC90/12AT6 with a different heater*'''EBC91/6AV6''' – Common cathode dual diode + high-μ AF triode for use in FM ratio detectors, triode μ = 100 (triode section similar in characteristics to one half of a ECC83/12AX7), Miniature 7-pin base; HBC91/12AV6 with a different heater*'''ECC87''' (E80CC/6085) – ECC40 with a Noval base, allowing for a heater center-tap<ref>[https://www.radiomuseum.org/tubes/tube_ecc87.html ECC87 on radiomuseum.org]</ref>*'''ECC801S''' = '''E81CC/6201''' = '''12AT7WA''' (6060) – Separate cathodes dual RF triode, Noval base*'''ECC802S''' = '''E82CC/6189''' = '''12AU7WA''' (6067) – Separate cathodes dual AF triode, Noval base*'''E81CC/6201''' = '''12AT7WA''' (6060) – Separate cathodes dual triode for AF and RF amplifiers, mixers up to 300 MHz, oscillators or impulse circuits, center-tapped 12.6 V/150 mA resp. 6.3 V/300 mA heater, Noval base, no cathode poisoning after prolonged periods in cut-off, shock/vibration resistant; premium version of ECC81/12AT7*'''E82CC/6189''' = '''12AU7WA''' (6067) – Separate cathodes dual triode for use as amplifier or multivibrator, center-tapped 12.6 V/150 mA resp. 6.3 V/300 mA heater, Noval base, no cathode poisoning after prolonged periods in cut-off, shock/vibration resistant; premium version of ECC82/12AU7*'''E83CC/6681''' (ECC803S/6057) – Separate cathodes low-[[microphonics]] dual triode, center-tapped 12.6 V/150 mA resp. 6.3 V/300 mA heater, Noval base, no cathode poisoning after prolonged periods in cut-off, shock/vibration resistant; premium version of ECC83/12AX7*'''DA04/5''' – 400 V, 5 W Half-wave rectifier; triode TA04/5 without grid*'''DA08/10''' – 800 V, 10 W Half-wave rectifier; triode TA08/10 without grid*'''DC1/50''' – 1 kV, 2×37.5 mA Full-wave rectifier; DC1/60 with heater on 3-pin base and dual anode top cap*'''DC1/60''' – DC1/50 with heater and dual anode on 4-pin base*'''DCX4/1000''' = '''3B28''' = STC '''2G/402A''' – 4 kV, 1 kW Half-wave Xenon rectifier with anode top cap*'''QEL1/150''' = '''7034''' = Eimac '''4X150A''' – Forced-air cooled 150 W beam power tetrode*'''TA08/10''' – 800 V, 100 W Radiation-cooled power triode*'''1561''' – 1.4 kV, 2×80 mA Full-wave rectifier; AZ2 with a European 4-pin base*'''6021/ECC70''', '''6112''', '''6690''', '''6832''' – Subminiature, separate cathodes dual triode, all-glass round cross-section envelope, circular 8-pin/wire-ends base*'''6533''' – Subminiature low-microphonics triode, 6.3 V/200 mA heater, 8-pin all-glass wire-endedEdiSwan used the [[#Cossor system|{{color|Green|BVA system}}]] first, then devised the system below but also used the [[#Mullard–Philips system|{{color|Green|Mullard–Philips scheme}}]]*'''D''' – S24, ''Bialkali'' [[potassium]]-antimony-caesium cathode, spectral response from UV to red*'''ЛФ''' ⟼ '''LF''' – Analog [[function generator]],<sup>([[:ru:Функциональная электронно-лучевая трубка|ru]])</sup> an analog [[mask ROM]] + [[Digital-to-analog converter|D/A converter]] combination consisting of an oscilloscope-type CRT with the phosphor screen replaced by an electron collector located behind a target perforated with sub-mm holes patterned such that the hole density {{math|''z''}} at any given {{math|''x'',''y''}} position is {{H:title|The D/A bit resolution is the binary logarithm of the number of holes at maximum hole density, that fit into the electron beam's circular cross section; the larger the cross section, the higher the bit resolution, but at the cost of the function being more smoothed over|proportional to the value}} of the desired [[Function of several real variables|{{Nowrap|{{math|''f'' (''x'',''y'')}}}}]]*'''XC900/2HA5''' – Frame-grid vari-μ VHF triode; EC900/6HA5, LC900/3HA5 or PC900/4HA5 with a different heater*'''YD1000''' = Siemens '''RS2021W''' – 10 MHz, 45 kW, Water jacket-cooled RF power triode*'''YD1001''' = '''RS2021L''' – 10 MHz, 35 kW, Forced-air cooled RF power triode*'''YD1012''' – 10 MHz, 180 kW, Vapor-cooled RF power triode*'''YD1130''' – 30 MHz, 400 W, Forced-air cooled, linear RF/AF power triode*'''YD1150''' = '''8728''' (Forced-air cooled), '''YD1152''' = '''8730''' (Water helix-cooled) – 160 MHz, 2.5 kW VHF power triode*'''YD1160''' = '''8731''' (Forced-air cooled), '''YD1161''' = '''8732''' (Water jacket-cooled), '''YD1162''' = '''8733''' (Water helix-cooled) – 120 MHz, 5 kW VHF power triode*'''YD1170''' = '''8666''' (Forced-air cooled), '''YD1171''' (Water jacket-cooled), '''YD1172''' = '''8668''' (Water helix-cooled) – 120 MHz, 10 kW VHF power triode*'''YD1173''' = '''8734''' – 50 MHz, 10 kW Forced-air cooled RF power triode*'''YD1175''' = '''8952''' – 120 MHz, 10 kW Forced-air cooled VHF power triode*'''YD1177''' = '''8958''' – 120 MHz, 15 kW Water helix-cooled VHF power triode*'''YD1180''' = '''8801''' – 100 MHz, 15 kW Forced-air cooled VHF power triode*'''YD1182''' = '''8735''' – 100 MHz, 20 kW Water jacket-cooled VHF power triode*'''YD1192''' = '''8736''' (Water jacket-cooled), '''YD1193''' (Vapor-cooled) – 30 MHz, 40 kW RF power triode*'''YD1195''' = '''8913''' – 100 MHz, 30 kW Forced-air cooled VHF power triode*'''YD1197''' = '''8937''' – 100 MHz, 40 kW Water jacket-cooled VHF power triode*'''YD1202''' = '''8752''' (Water jacket-cooled), '''YD1203''' (Vapor-cooled) – 30 MHz, 80 kW RF power triode*'''YD1212''' = '''8680''' (Water jacket-cooled), '''YD1213''' (Vapor-cooled) – 30 MHz, 120 kW RF power triode*'''YD1252''' = '''RS2051V''' – 180 kW, Vapor-cooled modulator power triode*'''YD1300''', '''YD1301''', '''YD1302''' – 1 GHz, 300 W, Forced-air cooled UHF power triode*'''YD1332''' – 960 MHz, 1.8 kW, Forced-air cooled UHF power triode*'''YD1333''' – 960 MHz, 900 W, Forced-air cooled UHF power triode*'''YD1334''' – 1 GHz, 1.8 kW, Forced-air cooled UHF power triode*'''YD1335''' – 1 GHz, 1.9 kW, Forced-air cooled UHF power triode*'''YD1336''' – 1 GHz, 1.8 kW, Forced-air cooled UHF power triode*'''YD1352S''' = '''8867''' = Amperex '''DX334''' – 5 MHz, 2 kW, Water-cooled ''Neotron'', a gridless ''field-effect tube'' where a magnetically-focused electron beam is modulated by varying the voltage of a gate electrode surrounding it. Used as RF power amplifier or oscillator*'''YH1100''' – 8.0 to 12.4 GHz ([[X band]]), 25 mW, Contact/conduction-cooled [[backward-wave oscillator]]<ref>{{cite web |url=https://frank.pocnet.net/other/Valvo/Valvo_Sende_1969.pdf |publisher=Valvo |title=Valvo Handbuch Sende- und Mikrowellenröhren, Mikrowellenbauteile (109MB) |year=1969 |pages=857ff. |language=de |access-date=27 June 2022}}</ref>*'''ZP1610''' – Side window, Xenon-filled organically quenched Geiger-Müller tube. 7 × 18 mm mica window, X-rays, 2.5 to 40 keV energy, 30 to 500 pm wavelength range*'''TB2.5/400''' (7986) – 2.5 kV, 300 W Radiation-cooled power triode*'''TB4/1500''' (8078) – Radiation-cooled power triode*'''TBL12/25''' (6618) – Forced-air cooled power triode*'''TBW12/25''' (6617) – Water-cooled power triode*'''6Д24Н''' ⟼ '''6D24N''' – ''[[Nuvistor]]'' UHF diode*'''6Ж54Н''' ⟼ '''6J54N''' – ''Nuvistor'' RF pentode*'''6П37Н''' ⟼ '''6P37N''' – ''Nuvistor'' power tetrode*'''6С51Н''', '''6С52Н''', '''6С53Н''', '''6С62Н''', '''6С63Н''', '''6С65Н''' ⟼ '''6S51N''', '''6S52N''', '''6S53N''', '''6S62N''', '''6S63N''', '''6S65N''' – ''Nuvistor'' triodes*'''6Э12Н''', '''6Э13Н''' = '''Н-59''', '''6Э14Н''' = '''Н-60''' ⟼ '''6E12N''', '''6E13N''' = '''N-59''', '''6E14N''' = '''N-60''' – ''Nuvistor'' tetrodes*'''7586''' – First commercially available ''[[Nuvistor]]'', medium-μ triode, 6.3 V/140 mA heater*'''7587''' – ''Nuvistor'' Sharp-cutoff tetrode, 6.3 V/150 mA heater*'''8056''' – Low (12-50 V) anode voltage ''[[Nuvistor]]'' triode, 6.3 V/135 mA heater*'''8393''' – ''Nuvistor'' medium-μ triode, used in [[Tektronix]] [[oscilloscope]]s; 7586 with a 13.5 V/60 mA heater====Philips systems====Most tubes before 1925 were assigned a letter and an optional [[Roman numerals|Roman numeral]] ([[#O1915|{{color|Green|examples}}]]). Transmitting tubes started with the letter '''Z'''.In 1923, [[Philips]] introduced their ''Miniwatt'' brand to indicate [[Hot cathode|''Dull Emitter'']] tubes.In 1925, the Roman numerals of tubes still in production were replaced by [[Arabic numerals]], and since then, new tubes were assigned as explained below; new transmitting tubes were assigned according to the system [[#Transmitting tubes|{{color|Green|above}}]].<ref name="PhilipsHistoryTo1935">{{cite web |url=https://nvhrbiblio.nl/biblio/boek/Stewart%20-%20Illustrated%20history%20of%20Philips%20radio%20valves%20to%201935.pdf |title=Illustrated history of Philips radio valves to 1935 |author=Stewart, Fin |year=1995 |access-date=15 May 2022}}</ref>=====Standard tubes 1925–34=====[[#Philips systems|{{color|Green|Philips}}]]:<ref name="PhilipsHistoryTo1935" />*'''1DZ''' = '''A''' – Directly heated triode, 4 V/250 mA filament, European candelabra bases on both ends, both Argon-filled and high-vacuum version available at the time, named after [[Hanso Idzerda]]*'''B''' – Directly heated triode, 2 V/500 mA filament, both Argon-filled and high-vacuum version available*'''BⅥ''' = '''B6''' – Directly heated [[Tetrode#Space charge grid tube|space charge grid]] tetrode, 1.7 V/150 mA filament; superseded by A241*'''C''' – Directly heated triode, 4 V/500 mA filament, both Argon-filled ('''CⅠ''') and high-vacuum ('''CⅡ''') version available*'''DⅠ''' = '''D1''' (Gas-filled), '''DⅡ''' = '''D2''' (High-vacuum) – Directly heated triode, 3.5 V/500 mA filament, used in 1920s [[Tuned radio frequency receiver|TRF]] and [[Regenerative circuit|regenerative]] radios*'''DⅢ''' = '''D3''' – '''DⅡ''' with a 3.0 V/500 mA filament, designed as an equivalent to the Telefunken RE11*'''DⅣ''' = '''D4''' (Gas-filled), '''DⅤ''' = '''D5''' (High-vacuum) – Directly heated triode, 3.5 V/500 mA filament, short-pin UV-style base for use in American equipment*'''F''' = '''ZⅠ''' – Directly heated power triode, 3.8 V/1.4 A filament, derived from the '''E''' tube*'''Q''' = '''DⅥ''' = '''D6''' – Directly heated space charge grid tetrode, 3.5 V/500 mA filament*'''ЛФ-4''' ⟼ '''LF-4''' – Beam deflection function generator tube for use in analog computers*'''ЛФ-8''' ⟼ '''LF-8''' – Beam deflection function generator tube for use in analog computers to calculate a [[hypotenuse]] as {{math|''z'' {{=}} {{radic|''x''<sup>2</sup>+''y''<sup>2</sup>}}}};''[[Zayeltsovsky District, Novosibirsk|Novosibirsk]]''<sup>([[:ru:НЭВЗ-Союз|ru]])</sup> tubes:*'''Н-37''' ⟼ '''N-37''' – [[Beam deflection tube]], used as balanced modulator/mixer<ref>{{cite web |url=https://www.lib.tpu.ru/fulltext/v/Bulletin_TPU/1974/v298/05_bw.pdf |author1=ФОМИЧЕВ, Ю. М. |author2=ВАРАКУТА, Ю. Н. |title=РЕГУЛИРЮЩИЕ УСТРОЙСТВА С МАЛЫМИ НЕЛИНЕЙНЫМН ИСКАЖЕНИЯМН "CONTROL DEVICES WITH SMALL NON-LINEAR DISTORTION" |publisher=[[Tomsk Polytechnic University]] |year=1974 |language=ru |access-date=27 May 2022}}</ref>*'''Н-41''' ⟼ '''N-41''' – Beam deflection tube, used as balanced modulator/mixer; similar to the [[#7360|{{color|Green|7360}}]]* [https://www.westernelectric.com/library/ Western Electric library]*'''18503''' = [[#ZP|{{color|Green|ZP1200}}]]*'''18504''' = ZP1400*'''18505''' = ZP1410*'''18506''' = ZP1431*'''18507''' = ZP1600*'''18509''' = ZP1310*'''18511''' = ZP1610*'''18515''' = ZP1441*'''18518''' = ZP1700*'''18520''' = ZP1210*'''18525''' = ZP1520*'''18526''' = ZP1430*'''18529''' = ZP1300*'''18536''' = ZP1451*'''18545''' = ZP1220*'''18546/01''' = ZP1460*'''18550''' = ZP1320*'''18555''' = ZP1330*'''EF59''' – RF pentode, B9G 9-pin Loctal base*'''ZP1200''', '''ZP1210''', '''ZP1220''' – Halogen-quenched Geiger-Müller tube, γ*'''ZP1300''', '''ZP1310''' – Halogen-quenched Geiger-Müller tube, γ and high-energy (>500 [[Electronvolt|keV]]) β*'''ZP1320''' – Halogen-quenched Geiger-Müller tube, γ and high-energy (>250 keV) β*'''ZP1410''' – Halogen-quenched Geiger-Müller tube, 19.8mm diameter mica window, [[Alpha particle|α]], β, γ*'''ZP1431''' – Halogen-quenched Geiger-Müller tube, 27.8mm diameter mica window, β, γ*'''ZP1441''' – Halogen-quenched Geiger-Müller tube, 19.8mm diameter mica window, α, β, γ, for use with ZP1700*'''ZP1451''' – Halogen-quenched Geiger-Müller tube, 27.8mm diameter mica window, α, β, γ, for use with ZP1700:*'''LM''' – ''Octalox'' (=Loctal) base, metal envelope:*'''LT''' – ''Octalox'' base, glass tubular envelope====={{anchor|PhilipsPro}}Professional tubes=====Philips also used a 4/5-digit system for professional/industrial/telecommunications tubes, which they phased out in the 1960s in favor of ''[[#PEPro|{{color|Green|PE Professional tubes}}]]'':*'''1000''' to '''1899''' – Rectifier:*'''1700'''s – [[Rectifier#Plasma type|Gas-discharge]] or [[Mercury-arc valve|Mercury-vapor]] rectifier:*'''1800'''s – High-vacuum rectifier*'''1900'''s – [[Iron–hydrogen resistor|Barretter]]*'''3500'''s – [[Phototube]] or [[Photomultiplier tube|photomultiplier]]*'''4000'''s – Misc.*'''18000''' to '''18099''' – [[Repeater#Telephone repeater|Telephone repeater]] triode or pentode*'''18100'''s – [[Image intensifier]] or [[X-ray image intensifier|image converter]]*'''18500'''s – [[Gaseous ionization detector|Radiation detector tube]] ([[Geiger–Müller tube|Geiger-Müller counter tube]] or [[Proportional counter|proportional counter tube]])*'''20610''' to '''28216''' – [[X-ray tube]]*'''55000''' to '''55399''' – Microwave tube*'''55800'''s – [[Video camera tube]]*'''56000'''s – Misc.{{anchor|PhilipsProEx}}'''Examples:'''*'''1927''' (40 to 120 V filament for 110VDC mains), '''1928''' (80 to 240 V filament for 220VDC mains) – Barretters for use with [[#180mADC|{{color|Green|180mADC}}]] tube sets<ref name="PhilipsFeH" />*'''3520''' – Early photomultiplier, 3-stage, [[Caesium]]-on-[[Silver oxide|oxidated-Silver]] [[photocathode]], spectral S1 response, side-contact 8 base*'''4000'''s – [[#4000Philips|{{color|Green|See below}}]]*'''56001''' – Directly heated, 300 V, 400 µA [[Thermionic emission|thermally-limited (=''saturated'') emission]] diode, 4.6 V/163 mA<sub>max</sub> filament, usable as a heating current-controlled, variable series resistor in voltage/current stabilizer circuits, or as an [[True RMS converter|RMS heating current-to-DC anode current converter]]; cf. 5845, Tesla RA0007, YA1000*'''{{Visible anchor|56006}}''' – ''Omegatron'' [[Mass spectrometry|Mass spectrometer]] tube. An [[electron gun]] sends an electron beam through a cavity to an electron collector anode. The cavity contains the gas to be analyzed. The gas is ionized by the electron beam and a magnetic field parallel to the axis of the beam forces the gas ions into a helical path around the beam, the angular velocity depending on the ion mass. An electrode inside the cavity floods it with RF energy from a [[sweep generator]]. When the frequency matches an ion's angular velocity, that ion will resonate and spiral outward like in a [[cyclotron]], eventually hitting an ion collector electrode and generating a current there, which is amplified and measured<ref>[https://frank.pocnet.net/sheets/009/5/56006.pdf 56006 data sheet] • [https://lampes-et-tubes.info/sp/sp091.php?l=e on Lampes-et-tubes]</ref>*'''2B23''' – Indirectly heated, magnetically controlled diode. An external, variable magnetic field from a [[solenoid]] spirals the electron stream away from the anode like in a [[Cavity magnetron|Magnetron]], driving the tube into cut-off with a sensitivity of -2 mA/[[Gauss (unit)|G]] (-20 mA/[[Tesla (unit)|mT]]), Octal base<ref>[https://lampes-et-tubes.info/sp/2B23.pdf 2B23 data sheet] • [https://lampes-et-tubes.info/sp/sp025.php?l=e on Lampes-et-tubes]</ref>:*'''EBF2G''', '''EBF2G/GT''' – EBF2 with an Octal base, heater between nonstandard pins 1 and 8*'''EBF32''' (6B8) – EBF2G with heater between standard pins 2 and 7*'''EBF35''' – EBF2G with different cathode, suppressor grid and shield connections on pins 2 and 7:*'''ECH3G''' – ECH3 with an Octal base:*'''ECH4G''' – ECH4 with an Octal base*'''ECH33''' = ECH3G*'''ECH34''' = ECH4G:*'''EK2G''' – EK2 with an Octal base*'''EK32''' = EK2G:*'''KF3G''' – KF3 with an Octal base:*'''KK2G''' – KK2 with an Octal base*'''KK32''' = KK2G:*'''KL4G''' – KL4 with an Octal base[[Philips]]:*'''820B''' – Water-cooled RF power triode, 11 V/34 A filament<ref name="SylvaniaTT1934">{{cite web |url=http://n6jv.com/museum/data/archives/sylvania1934.pdf |publisher=[[Sylvania Electric Products|Hygrade Sylvania]] |title=Sylvania Transmitting Tubes |year=1934 |access-date=27 December 2021}}</ref>*'''863''' – Water-cooled RF power triode, 11 V/52 A filament<ref name="SylvaniaTT1934" />*'''867''' – 1 kV, 600 mA Grid-controlled, half-wave Mercury-vapor rectifier<ref name="SylvaniaTT1934" />*'''873''' – 1 kV, 2.5 A Grid-controlled, half-wave Mercury-vapor rectifier<ref name="SylvaniaTT1934" />*'''PL5''' – 1.5 kV, 3.5 A<sub>avg</sub>, 100 A<sub>peak</sub> ''Sendytron'',<sup>([[:de:Senditron|de]])</sup> a Mercury-vapor thyratron with an auxiliary anode and capacitive ignition by an isolated control rod dipping into the cathode pool<ref>{{cite web |url=https://frank.pocnet.net/sheets/030/p/PL5.pdf |title=PL5 data sheet |date=10 October 1954 |publisher=[[Philips]] |access-date=16 December 2021}}</ref><ref>{{cite web |url=http://electron-tubes.info/iz/SENDITRON.pdf |title=The construction of a gas-discharge tube |access-date=16 December 2021}}</ref>*'''PL10''' – 400 V, 100 mA<sub>avg</sub>, 4 A<sub>peak</sub> Mercury-vapor thyratron with external capacitive ignition[[Sylvania Electric Products|Sylvania]]:*'''SY1301(A)''' – ''Omegatron'' [[Mass spectrometry|Mass spectrometer]] tube, [[Pyrex|Nonex glass]] envelope;<ref>[https://frank.pocnet.net/sheets/168/s/SY1301.pdf SY1301 data sheet]</ref> see Philips [[#56006|{{color|Green|56006}}]]*'''РМО-4С''' ⟼ '''RMO-4S''' – ''Omegatron'' [[Mass spectrometry|Mass spectrometer]] tube;<ref>[https://lampes-et-tubes.info/sp/RMO-4S.pdf Омегатронная лампа типа РМО-4С data sheet] • on [https://lampes-et-tubes.info/sp/sp092.php?l=e Lampes-et-tubes]</ref> see Philips [[#56006|{{color|Green|56006}}]]:*'''1–9''' – Sequentially assigned, comprising most base types popular in 1934–37:::*P8A Side-contact 8 (near-exclusive since 1937):*'''10–19''' – Y8A ''Steel tube'' 8-pin (introduced in 1937)::—Before 1942:::*K8A Octal with filament between pins 1 and 8 {{small|(DAC21, DBC21, DCH21, DF21, DF22, DK21, DL21, DLL21, DM21)}}:*'''30–39''' – K8A [[Tube socket#Octal|Octal]] with filament/heater between standard pins 2 and 7::—Before 1947:*'''2C21''' – Separate cathodes dual RF triode, indirectly heated, [[Dielectric loss|low loss]] [[mica]]-filled [[Phenol formaldehyde resin|phenolic resin]] ("Micanol")<ref name="Micanol" /> 7-pin base, one grid on top cap*'''2C50''' – Separate cathodes dual triode, indirectly heated, Octal base, for use in [[Servomechanism|servo amplifiers]]*'''2C51''' – Separate cathodes dual shielded VHF triode, indirectly heated, Noval base*'''2C52''' – Separate cathodes dual triode, indirectly heated, Octal base*'''2C53''' – Indirectly heated, 8 kV triode, Octal base with anode top cap*'''3C33''' – Common cathode dual power triode for use in [[Zero crossing control|burst-]] or [[Phase-fired controller|phase-fired]] controllers, Septar 7-pin base*'''3C45''' = '''6130''' – 45 mA<sub>avg</sub>, 1.5 A<sub>[[Root mean square|RMS]]</sub>, 35 A<sub>peak</sub>, Half-indirectly heated Hydrogen triode thyratron, 4-pin base with anode top cap*'''E91AA/5726/6AL5W''' = '''EAA901S''' – RF Dual diode, Miniature 7-pin base, no [[Hot cathode#Failure modes|cathode interface/poisoning]] after prolonged periods in [[Cut-off (electronics)#Tubes|cut-off]], shock/vibration resistant*'''EC1000/8254''' – Triode for use as amplifier in [[Test probe|probes]], 8-pin all-glass pigtailed with grid on top wire, shock/vibration resistant*'''EC1030''' – Indirectly heated UHF triode, all-glass round cross-section envelope with 8 circular, tinned, 38 mm long wires, [[Hot spare#Hot standby operation of vacuum tubes|''hot-standby'']] resistant (no [[Hot cathode#Failure modes|cathode interface/poisoning]] after prolonged periods in [[Cut-off (electronics)#Tubes|cut-off]])*'''EC1031''' – EC1030 with 5.5 mm long, Gold-plated pins for insertion into a special socket, no cathode poisoning after prolonged periods in cut-off*'''EC8010/8556''' – UHF triode for use as amplifier or oscillator up to 1 GHz, Noval base, shock/vibration resistant*'''EC8020''' – UHF triode, Noval base, no cathode poisoning after prolonged periods in cut-off, shock/vibration resistant*'''E86C''' = '''EC806S''' – UHF triode up to 800 MHz, dual anode and cathode pins and triple grid pins for use as [[Valve RF amplifier#Grounded grid amplifier|grounded-grid amplifier]], Noval base with Gold-plated pins, no cathode poisoning after prolonged periods in cut-off, shock/vibration resistant*'''E88C/8255''' – UHF triode up to 1 GHz, quintuple grid pins for use as grounded-grid amplifier, Noval base, no cathode poisoning after prolonged periods in cut-off, shock/vibration resistant*'''ECC2000''' – VHF separate cathodes, dual triode with neutralization screen, for use as cascode amplifier up to 300 MHz, Decal base with Gold-plated pins, shock/vibration resistant*'''ECC8100''' – VHF separate cathodes, dual triode with neutralization screen ("''Neutrode''") connected to the heater, for use as cascode amplifier, Noval base, no [[Hot cathode#Failure modes|cathode interface/poisoning]] after prolonged periods in [[Cut-off (electronics)#Tubes|cut-off]], shock/vibration resistant*'''E80CC/6085''' – Separate cathodes, dual triode for use as DC or AF amplifier, center-tapped 12.6 V/300 mA resp. 6.3 V/600 mA heater, Noval base, shock/vibration resistant*'''E81CC/6201''' = '''12AT7WA''' – Separate cathodes, dual triode for AF and RF amplifiers, mixers up to 300 MHz, oscillators or impulse circuits, center-tapped 12.6 V/150 mA resp. 6.3 V/300 mA heater, Noval base, no cathode poisoning after prolonged periods in cut-off, shock/vibration resistant*'''E82CC/6189''' = '''12AU7WA''' – Separate cathodes, dual triode for use as amplifier or multivibrator, center-tapped 12.6 V/300 mA resp. 6.3 V/600 mA heater, Noval base, no cathode poisoning after prolonged periods in cut-off, shock/vibration resistant; premium version of ECC82/12AU7*'''E83CC/6681''' – Separate cathodes, low-microphonics dual triode, center-tapped 12.6 V/300 mA resp. 6.3 V/600 mA heater, Noval base, no cathode poisoning after prolonged periods in cut-off, shock/vibration resistant*'''E88CC/6922''' – Separate cathodes, dual triode, Noval base with Gold-plated pins, no cathode poisoning after prolonged periods in cut-off, shock/vibration resistant*'''E92CC''' – Common cathode, dual triode for use as a flip-flop in computers, Miniature 7-pin base, no cathode poisoning after prolonged periods in cut-off, not recommended where low hum or microphony or noise is critical*'''E180CC/7062''' – Separate cathodes, dual triode for use as a flip-flop in computers, center-tapped 12.6 V/200 mA resp. 6.3 V/400 mA heater, Noval base, no cathode poisoning after prolonged periods in cut-off, not recommended where low hum or microphony or noise is critical*'''E181CC/7118''' – Separate cathodes, dual triode for use in digital computers, center-tapped 12.6 V/200 mA resp. 6.3 V/400 mA heater, Noval base, no cathode poisoning after prolonged periods in cut-off, not recommended where low hum or microphony or noise is critical*'''E182CC/7119''' – Separate cathodes, dual triode for use as a flip-flop in computers, center-tapped 12.6 V/320 mA resp. 6.3 V/640 mA heater, Noval base, no cathode poisoning after prolonged periods in cut-off, not recommended where low hum or microphony or noise is critical*'''E188CC/7308''' – Separate cathodes, low-microphonics, dual triode for use as RF/IF/AF amplifier, Noval base, shock/vibration resistant*'''E283CC''' – Separate cathodes, low-hum, low-microphonics, dual triode for use as [[Valve audio amplifier|AF]] or [[instrumentation]] amplifier, Noval base, no cathode poisoning after prolonged periods in cut-off, shock/vibration resistant*'''E288CC/8223''' – Separate cathodes, dual triode for use in wideband, low-noise IF, RF and cascode amplifiers, Noval base, no cathode poisoning after prolonged periods in cut-off, shock/vibration resistant*'''ECF8070''' – Triode + pentode, no [[Hot cathode#Failure modes|cathode interface/poisoning]] after prolonged periods in [[Cut-off (electronics)#Tubes|cut-off]]*'''E80CF/7643''' – Triode + pentode, separate cathodes, no cathode poisoning after prolonged periods in cut-off, shock/vibration resistant*'''ECH8000''' – Triode/remote-cutoff heptode mixer, Noval base, no [[Hot cathode#Failure modes|cathode interface/poisoning]] after prolonged periods in [[Cut-off (electronics)#Tubes|cut-off]], shock/vibration resistant*'''ED8000''' – Power triode for use in series-pass voltage regulators, Noval base, no [[Hot cathode#Failure modes|cathode interface/poisoning]] after prolonged periods in [[Cut-off (electronics)#Tubes|cut-off]], shock/vibration resistant*'''EF8010''' – Remote-cutoff RF/IF pentode, no [[Hot cathode#Failure modes|cathode interface/poisoning]] after prolonged periods in [[Cut-off (electronics)#Tubes|cut-off]], shock/vibration resistant*'''E83F/6689''' – Long-life, wideband pentode for use in telephone equipment, Gold-plated pins, long-life >10000h*'''E88F''', '''E88FN''' – RF/IF Pentode, long-life >10000h*'''E90F/6BH6/7693''' – RF Pentode, Miniature 7-pin base, shock/vibration resistant*'''E95F/6AK5W/5654''' – VHF/RF/IF Sharp-cutoff pentode, Miniature 7-pin base, shock/vibration resistant*'''E99F/6BJ6/7694''' – Remote-cutoff RF pentode, Miniature 7-pin base, shock/vibration resistant*'''E186F/7737''' – Wideband, low-microphonics pentode for use as amplifier, shock/vibration resistant*'''E280F/7722''' – Wideband pentode for use as low-noise amplifier up to 300 MHz, no [[Hot cathode#Failure modes|cathode interface/poisoning]] after prolonged periods in [[Cut-off (electronics)#Tubes|cut-off]], shock/vibration resistant*'''E282F''' – Wideband pentode for use as amplifier up to 250 MHz, no cathode poisoning after prolonged periods in cut-off, shock/vibration resistant*'''E810F/7788''' – Wideband pentode, Gold-plated pins, no cathode poisoning after prolonged periods in cut-off, shock/vibration resistant*'''EH81''' – Heptode for use as FM detector*'''E81H''' – Heptode for use as FM detector*'''EH90/6CS6''' – Dual-control heptode for use as gated amplifier or combined sync sep/clipper in TV receivers*'''EL3010''' – 16.5 W Linear power pentode, center-tapped 12.6 V/1.1 A resp. 6.3 V/2.2 A heater, Octal base, no [[Hot cathode#Failure modes|cathode interface/poisoning]] after prolonged periods in [[Cut-off (electronics)#Tubes|cut-off]], shock/vibration resistant*'''EL5070/8608''' – Frame-grid, wideband video power pentode, Magnoval base*'''E80L/6227'''[[File:E80L pentode.jpg|100 px|thumb|right|E80L]] – 2.8 W AF power pentode, Noval base with Gold-plated pins, shock/vibration resistant, long-life >10000h*'''E81L/6686''' – Long-life 1 W power pentode for use in telephone equipment, Noval base with Gold-plated pins, long-life >10000h (no relationship to EL81)*'''E84L/7320''' – 6 W Power pentode for use in AF amplifiers and stabilized power supplies, Noval base, no [[Hot cathode#Failure modes|cathode interface/poisoning]] after prolonged periods in [[Cut-off (electronics)#Tubes|cut-off]], shock/vibration resistant*'''E235L/7751''' – Wideband power pentode, Octal base, no cathode poisoning after prolonged periods in cut-off, shock/vibration resistant*'''E236L''' – Wideband power pentode, Octal base, no cathode poisoning after prolonged periods in cut-off, shock/vibration resistant*'''E90Z/6063''' – Full-wave rectifier, Miniature 7-pin base, shock/vibration resistant*'''1634''' – Common cathode dual triode; 12SC7 with tightened specs*'''1642''' = '''2C21''' – Separate cathodes dual RF triode, "Micanol" 7-pin base, one grid on top cap===={{anchor|OEMW}}'''MW'''====[[Philips]]:*'''MW6-2''' ([[Black and white|B/W]] TV), '''MG6-2''', '''MU6-2''', '''MY6-2''' (Color TV), '''MV6-5''' (radar) – 55 mm (2") [[Rear-projection television|Rear-projection CRTs]], 25 kV anode voltage, magnetic deflection and focusing, V5A side-contact 5 base* [http://rca.vobj.org/ RCA Engineer archive]The RPY numbers are the equivalent under the later [[Pro Electron#Frequently used first letters in European active devices|''Pro Electron'' semiconductor designation system]]*'''D''' – Vacuum, Mercury-vapor or Xenon [[rectifier]] including grid-controlled types*'''M''' – AF Power triode for use as amplifier or [[Radio transmitter design#Plate AM modulators|modulator]]*'''P''' – Power pentode*'''Q''' – Power tetrode*'''R''' – Vacuum, Mercury-vapor or inert-gas rectifier*'''T''' – RF Power triode for use as amplifier or oscillator*'''X''' – Hydrogen, Mercury-vapor or inert-gas [[thyratron]]:—'''Reflex Klystrons:''' Output power in mW*'''ES''', '''ESA''', '''ESV''', '''ESW''' – Power triode*'''ESG''' – Power tetrode*'''ESU''', '''U''' – Half-wave high-vacuum or gas-filled rectifier*'''ES75''' ([[Gain (electronics)|μ]] = 5), '''ES75H''' (μ = 11) – 1 kV, 75 W AF Power triode*'''ES250M''' – 2 kV, 250 W AF Power triode*'''ES1101''' – 1.25 kV, 40 W AF Power triode*'''ES1102''' – 1.25 kV, 100 W AF Power triode*'''Q''' – Special quality tube*'''12X4''' – Full-wave rectifier, Miniature 7-pin base; 6X4/EZ90 with a different heater*'''PCC806''' – Dual vari-μ frame-grid VHF triode for use as cascode amplifier<ref name="MazdaEdiSwan1970" />*'''PCF808''' – Frame-grid triode + pentode for use as RF amplifier and scanning oscillator in TV receivers, Noval base<ref name="MazdaEdiSwan1970" />*'''MA6/300''' – 6 kV, 300 W Radiation-cooled AF power triode*'''MA10/200''' – 10 kV, 200 W Radiation-cooled AF power triode*'''MA10/1000''' – 10 kV, 1 kW Radiation-cooled AF power triode*'''MA12/15''' = '''MA12/15000''' (Water-cooled), '''MAL12/15''' (Forced-air cooled) – 12 kV, 15 kW AF Power triode*'''MC2,5/75''' – 2.5 kV, 75 W Radiation-cooled AF power triode*'''MZ05/20''' – 500 V, 20 W Radiation-cooled AF power triode*'''MZ05/60''' – 500 V, 60 W Radiation-cooled AF power triode*'''MZ1/75''' – 1 kV, 75 W Radiation-cooled AF power triode*'''MZ1/100''' – 1 kV, 100 W Radiation-cooled AF power triode*'''MZ2/250''' – 2 kV, 250 W Radiation-cooled AF power triode:*[[Second source]]d by STC as [[#4000STC|{{color|Green|4200s}}]][[Second source]]d by STC as [[#4000STC|{{color|Green|4300s}}]]*'''323A/B''' – 1.25 kV, 1.5 A Argon/Mercury-vapor thyratron, 5-pin base;<ref>{{cite web |url=http://www.4tubes.com/1-DATASHEETS/SCANS-Original/!5-Numbers-100--999/323B_WE_Datasheet.pdf |publisher=[[Western Electric]] |title=323B Vacuum Tube |year=1962 |access-date=12 June 2021}}</ref><ref name="WE287A_323A_354A_355A" />*'''355A''' – 4 A Argon/Mercury-vapor thyratron<ref name="WE287A_323A_354A_355A" />*'''378A''' – 30 kV, 200 mA Directly heated half-wave rectifier, center-tapped filament, 4-pin base;<ref name="WE371A_378A" /> see 371A[[Edison and Swan Electric Light Company|Mazda/EdiSwan]] 4-volts AC, indirectly heated ("Mains Operated") receiver tubes with mostly [[#Cossor system|{{color|Green|Cossor}}]] and [[#Mullard designations before 1934|{{color|Green|Mullard}}]] function codes:*Radio Bygones, February/March 1991: Geoff Arnold: Radio Valves and Tubes - 1: [https://nzvrshome.files.wordpress.com/2019/07/valve-numbering-and-equivalents-radio-bygones.pdf Numbering Systems] ([https://rubli.net/valve_data/HTML/VALVENUM.HTM html])Besides their "4000" system with incorporated [[Western Electric]] 3-digit type numbers, [[Standard Telephones and Cables|STC]] used the following system:<ref>{{cite web |url=https://frank.pocnet.net/sheets/144/suppinfo/STC_1947_Standard_Valves.pdf |publisher=[[Standard Telephones and Cables|STC]] |title=STC Standard Valves |date=September 1947 |pages=36ff. |access-date=10 October 2021}}</ref>*A digit: Electrode count:*'''2''' – Diode:*'''3''' – Triode:*'''33''' – Dual triode:*'''4''' – Tetrode:*'''5''' – Pentode*A letter: Type:*'''A''' – Anode dissipation below 10 W:*'''B''' – Anode dissipation 10...100 W:*'''C''' – Anode dissipation 100...1000 W:*'''D''' – Anode dissipation 1 kW or more:*'''J''' – Forced-air cooled:*'''Q''' – Water cooled:*'''S''' – Low voltage rectifier:*'''T''' – High voltage rectifier:*'''V''' – Mercury vapor rectifier*A slash ("/")*Two digits: Power rating*A sequentially assigned digit*A letter: Base:*'''A''' – American base:*'''B''' – British base:*'''C''' – Edison screw base:*'''D''' – Octal base:*'''E''' – Special base:*'''G''' – Flying leads:*'''J''' – Disk-seal tube:*'''K''' – Miniature baseFor '''examples''' [[#4000STC|{{color|Green|see below}}]]Besides [[#RETMA standard tubes system|{{color|Green|RETMA}}]], [[#EIA professional tubes system|{{color|Green|EIA}}]] and [[#Mullard–Philips system|{{color|Green|Mullard–Philips}}]] systems, Brimar ("'''''Bri'''tish '''M'''anufactured '''A'''merican '''R'''adio''" [tubes]) used the following system:<ref name="DecoderLinks" />*'''C4''' – 55 to 105 V filament with an ''Urdox'' power thermistor*'''C6''' – 75 to 150 V filament with an ''Urdox'' power thermistor*'''U30''' – 70 to 122.5 V filament, used to adapt standard 116-volts Rimlock tube sets such as UCH42+UF41+UBC41+UL41+UY41 or UCH42+2×UAF42+UL41+UY41 to 220V mains, Octal base because the power dissipation is too high for Rimlock*'''MA4/500''' – 4 kV, 500 W Radiation-cooled AF power triode*'''4060''' – Directly heated, [[electrometer]] ''Dual Plate'' (filament sandwiched between grid and anode)<ref>[https://www.radiomuseum.org/forum/dual_plate_triodes_a_review.html Dual Plate triodes on radiomuseum.org]</ref> planar triode, grid current ≤10 fA, 3-pin base with grid on top cap*'''4066''' – Directly heated electrometer tetrode, #2 grid current ≤2.5 fA, 5-pin all-glass pigtailed*'''4067''' – Directly heated electrometer pentode, #1 grid current ≤25 pA, inline 5-pin all-glass pigtailed, for use in [[pH meter]] probes*'''4068''' – Directly heated electrometer pentode, #1 grid current ≤3 fA, 5-pin all-glass pigtailed*'''4069''' – Directly heated electrometer triode, controlled logarithmic relationship between 3 pA...3 nA positive grid current and anode current, 5-pin all-glass pigtailed, for probe amplifiers*'''4357''' – 85 to 100 V, 10 to 40 mA Neon-filled voltage-regulator tube, European 4-pin base*'''4687''' – 85 to 100 V, 10 to 40 mA Neon-filled voltage-regulator tube, side-contact 8 base*'''4445''' – ''SpectraPlex'' [[Video camera tube#Vidicon|Vidicon]] for use in single-tube color video cameras, target overlaid with fine vertical yellow (=white - blue), and diagonal cyan (=white - red) [[dichroic filter]] stripes each separated by unfiltered stripes of equal width. The [[NTSC]]-format scanning beam sweeps over the alternately filtered and unfiltered stripes of the target, producing a normal baseband luminance (Y) signal plus a 5 MHz carrier amplitude-modulated with the "luminance - blue" (Y-B) [[YCbCr|component]] plus a 5 MHz × sin 45° = 3.58 MHz "luminance - red" (Y-R) carrier.<ref>[http://www.r-type.org/articles/art-244.htm Single Tube Colour Cameras]. I. R. Sinclair, Television, June 1973</ref><ref>The Saticon Camera Tube. David K. Matthewson, Television, May 1984 - [https://worldradiohistory.com/hd2/IDX-UK/Technology/Technology-All-Eras/Archive-Practical-Television-IDX/80s/Television-Servicing-UK-1984-05-OCR-Page-0027.pdf page 27], [https://worldradiohistory.com/hd2/IDX-UK/Technology/Technology-All-Eras/Archive-Practical-Television-IDX/80s/Television-Servicing-UK-1984-05-OCR-Page-0028.pdf page 28]</ref> The two carriers are demodulated and the [[RGB color model|RGB]] colors then calculated as {{Nowrap|R{{=}}Y-(Y-R)}}, {{Nowrap|G{{=}}Y-R-B}} and {{Nowrap|B{{=}}Y-(Y-B)}}*'''4470''' – [[Image intensifier]] + [[Video camera tube#Image orthicon|Image Orthicon]] combination*'''4471''', '''4472''' – 931 9-stage [[Photomultiplier tube|photomultipliers]] with controlled sensitivity above 580 nm*'''4473''' – 1P21 9-stage photomultiplier with controlled sensitivity above 580 nm*'''150AV''' – Vacuum photometric cell, blue sensitive*'''150CV''' – Vacuum photometric cell, Red/IR sensitive*'''150UV''' – Vacuum photometric cell, Blue/UV sensitive*'''155UG''' – Gas-filled, cold-cathode, UV sensitive [[Flame supervision device|flame detector tube]], direct operation from 220VAC mains, Noval base with only 4 pins<ref>{{cite web |url=https://lampes-et-tubes.info/pc/155UG.pdf |publisher=Valvo |title=155UG data sheet |date=November 1966 |language=de |access-date=23 August 2021}} • [https://lampes-et-tubes.info/pc/pc022.php?l=e on Lampes-et-tubes]</ref>*'''2B6''' – ''[[Triple-twin|Triple-Twin]]'' AF signal + ''zero bias'' power triode, internally connected as a cathode follower like today's [[Darlington transistor]]s; cf. 295, 6B5, 6N6*'''6AC5-G''' – ''Zero bias'' high-μ power triode designed for operation with positive grid bias up to +13 V supplied from a [[Amplifier#Common terminal|cathode follower]] driver triode such as 76, 6J5, 6P5, or half a 6AE7; cf. 295, 2B6, 6B5, 6N6G ''[[Triple-twin|Triple-Twin]]'' [[Darlington transistor|Darlington]] triodes*'''6AE7-GT''' – Dual triode with a common, single anode, for use as a cathode follower driver for two ''zero bias'' power triodes such as 6AC5; cf. 295, 2B6, 6B5, 6N6G ''Triple-Twin'' Darlington triodes*'''6B5''' – ''[[Triple-twin|Triple-Twin]]'' AF signal + ''zero bias'' power triode, internally connected as a cathode follower like today's [[Darlington transistor]]s; cf. 295, 2B6, 6N6*'''6BC5''' – Semiremote-cutoff RF pentode up to 400 MHz*'''6BR7''' – Low-[[microphonics]] AF pentode*'''6CE5''' – Semiremote-cutoff RF pentode*'''6SR7''' – Dual diode + triode*'''12BR7''' – Dual diode + triode with a center-tapped 12.6 V/225 mA resp. 6.3 V/450 mA heater; 9BR7 with a different heater*'''12SF7GT''' – Diode + pentode*'''50X6''' (Loctal base), '''50Y7GT''' (Octal base, heater tap for a pilot lamp) – Dual rectifier with separate cathodes for use as a [[voltage doubler]]*'''1B25''' – 160 V [[Surge protector#Gas discharge tube (GDT)|Cold-cathode surge protector]]*'''1B46''' (79...85 V), '''1B47''' (75...90 V), '''1B64''' (70 V) – 1...2 mA [[Voltage-regulator tube]]s, dual-contact [[Lightbulb socket#Bayonet styles|Bayonet candelabra]] mount*'''1B59''' – Cold-cathode ''Glow modulator tube'', modulation up to 15 kHz, 2-pin Octal base===='''XG'''====*'''XG1/2500''' – 1 kV, 2.5 A Mercury-vapor triode [[thyratron]] with anode top cap*'''XG2/6400''' – 2.5 kV, 6.4 A Mercury-vapor triode thyratron with anode top cap===='''XH'''====*'''XH3/045''' (3C45) – 3 kV, 45 mA Hydrogen triode thyratron with anode top cap*'''XH8/100''' (4C45) – 8 kV, 100 mA Hydrogen triode thyratron with anode top cap*'''293A''' – AF Power pentode, 10 V/320 mA heater, 6-pin base<ref>{{cite web |url=http://westernelectric.sectorlink.org/static/library/specifications/tubes/293A.pdf |title=293A Vacuum tube |publisher=[[Western Electric]] |access-date=11 June 2021}}</ref> (not to be confused with the [[#Directly AC-heated power tubes|{{color|Green|293 ''Triple-Twin''}}]])*'''295A''' – 125 W, Directly heated AF/RF power triode, 4-pin base<ref>{{cite web |url=https://frank.pocnet.net/sheets/136/2/295A.pdf |title=295A Vacuum tube |publisher=[[Western Electric]] |year=1936 |access-date=12 June 2021}}</ref> (not to be confused with the 295 ''Triple-Twin'')[[Philips]], [[Mullard]]:*'''4606''' – Directly heated triode, 4.5 V/1 A filament, 4-pin Bayonet base, for use as preamplifier in telephone equipment*'''4607''' – Directly heated triode, 2.1 V/1 A filament, 4-pin Bayonet base, for use as preamplifier in telephone equipment*'''4609''' – Directly heated triode, 4.2 V/250 mA filament, 4-pin Bayonet base, for use as preamplifier in telephone equipment*'''4613''' – Directly heated power triode, 4 V/1 A filament, 4-pin base*'''4614''' – Indirectly heated power triode, 4 V/1 A heater, 5-pin base*'''4617''' – Directly heated triode, 4 V/250 mA filament, 4-pin Bayonet base, for use as preamplifier in telephone equipment*'''4624''' – Directly heated power triode, 7.2 V/1.1 A filament, 4-pin base*'''4630''' – Directly heated triode, 4.2 V/250 mA filament, 4-pin Bayonet base, for use as preamplifier in telephone equipment*'''4631''' – Directly heated triode, 2 V/250 mA filament, 4-pin Bayonet base, for use as preamplifier in telephone equipment*'''4641''' – Directly heated power triode, 4 V/2.1 A filament, 4-pin base*'''4657''' – Indirectly heated, shielded AF triode, 4 V/1 A heater, 5-pin base*'''4662''' – Neon-filled bar graph indicator, a glass tube with a short anode, a keep-alive anode and a long wire cathode that glows partially, the glow length is proportional to the tube current; similar to [[#OET|{{color|Green|GEC TuneOn}}]], ИН-9*'''4683''' – Directly heated power triode, 4 V/950 mA filament, side-contact 8 base[[RCA]]:*'''4028''' – Ceramic/metal ''pencil''-type disk-[[Cermet#Ceramic-to-metal joints and seals|seal]] UHF power triode for pulsed operation up to 1 kW*'''4037A''' – [[Triode#Lighthouse tubes|''Lighthouse''-type]] disk-seal UHF power triode for continuous operation, P<sub>anode</sub> = 6.25 W up to 2 GHz, replaces 2C40A*'''4055''' – Ceramic/metal ''pencil''-type disk-seal SHF power triode for pulsed operation up to 1.3 kW*'''4058''' – Ceramic/metal ''pencil''-type disk-seal SHF power triode for pulsed operation up to 800 W*'''4060''', '''4061''' – Cased-in ceramic/metal ''pencil''-type disk-seal UHF power triode for pulsed operation up to 500 W*'''4068''' – Cased-in ceramic/metal ''pencil''-type disk-seal UHF power triode for pulsed operation up to 500 W*'''4070''', '''4071''' – Cased-in ceramic/metal ''pencil''-type disk-seal UHF power triode for pulsed operation up to 600 W*'''4072''' – Cased-in ceramic/metal ''pencil''-type disk-seal UHF power triode for pulsed operation up to 500 W*'''4449A''' – Image converter for use as a high-speed [[Shutter (photography)|high-speed shutter]] in photography, S11-type [[photocathode]], P11 blue, short-persistence [[phosphor]]*'''4486''' – 7NP4 [[CRT projector|projection CRT]] with a fitted HV cable*'''4583''' (Sulfide [[phosphor]], blue), '''4584''' (Silicate, green), '''4585''' (Rare earth, red) – 7" Projection CRT set, 80 kV anode voltage, considerable [[X-ray tube#Hazards of X-ray production from vacuum tubes|X-radiation]], magnetic deflection, for use with [[Cassegrain reflector#Schmidt-Cassegrain|Schmidt optics]]*'''4600A''' – 3.5 kV, 1.75 kW Beam power tetrode for voltage regulator applications *'''4604''' – 60 MHz, 90 W RF Beam power tetrode, filament warm-up time less than a second, for use in mobile and emergency transmitters where the [[Push-to-talk|push-to-talk button]] also controls the heater supply*'''4616''' (275kW pulsed 600MHz), '''4618''' (1.35kW CW 600MHz), '''4621''' (17kW pulsed 1.215GHz), '''4622''' ('''7649''', 4.5kW pulsed 1.215GHz), '''4624''' (300W CW 890MHz), '''4626''' (1.5kW), '''4628''' (10kW), '''4630''' (7.5kW), '''4631''' (80W CW 400MHz), '''4632''' (2.3kW CW 890MHz), '''4634''' (600W), '''4635''' (2.5kW CW 400MHz), '''4636''' (300W CW 890MHz), '''4637''' (340W CW 400MHz), '''4638''' (1.5kW), '''4647''' (500W pulsed 1GHz), '''4648''' (1kW pulsed 1GHz), '''4651''' (1kW CW 400MHz), '''4652/8042''' (90W CW 60MHz), '''4661''' (1.5kW CW 400MHz), '''4662''' (300W CW 470MHz) – Beam power tetrodes*'''4617''' – 425 MHz, 8 MW Water cooled, pulsed RF power triode, 1.5 V/1.8 kA filament*'''4620''' – 857B Mercury-vapor rectifier with a shielded filament to protect it against arc-back*'''4654/5762''' – 216 MHz, 6.35 kW VHF power triode*'''4820''' – 5" Projection CRT, 45 kV anode voltage, considerable X-radiation, magnetic deflection, P45 white, medium-persistence [[phosphor]], for use with Schmidt optics[[Standard Telephones and Cables]]:*'''4011B''' – 30 W Directly heated power triode, 8 V/1.6 A filament, 4-pin Bayonet base*'''4015A''' = STC '''3D/150G''' – 1.5 kW Directly heated power triode, 11 V/41 A filament, cable connections*'''4016A''', '''4016B''' (grid on opposite side) – 33 MHz, 400 W Directly heated power triode, 14 V/18 A filament, base and lateral stud connections*'''4019A''' (4-pin Bayonet base), '''4019B''' (European 4-pin base) – 290 mW Directly heated power triode, 4 V/250 mA filament*'''4020A''' (4-pin Bayonet base), '''4020B''' (European 4-pin base), '''4020C''' (European 4-pin base with grid on top cap) – Directly heated triode, 2 V/250 mA filament*'''4021A/B/C''' – 250 mW Directly heated power triode, 4 V/250 mA filament*'''4022A/AR/B''' – 160 mW Directly heated power triode, 4 V/250 mA filament*'''4033A''' (European 5-pin base), '''4033AF''' (qualified for use in [[Aircraft station|standard aircraft radio]]), '''4033B''' (UY5 base), '''4033L''' = STC '''3B/252B''' – 2 MHz, 25 W Indirectly heated power triode, 6 V/1.4 A heater*'''4043A/C''' ('''3B/351A''', UX4 base), '''4043B/D''' ('''3B/351B''', European 4-pin base) – 2 MHz, 35 W Directly heated power triode, 7.5 V/1.2 A filament, versions C and D with reduced grid emission*'''4056A/B''' (STC '''3B/352A''') – 35 W Directly heated power triode, 6 V/1.9 A filament, 4-pin base*'''4060A''' – 10 MHz, 200 W Directly heated power triode, 12.5 V/6 A filament*'''4062A''' – 15 MHz, 75 W Directly heated power triode, 12 V/1.85 A filament, 4-pin base*'''4074A''' = STC '''33A/138A''' – 100 MHz, 5 W each, Indirectly heated dual power triode, 6.3 V/800 mA heater, 7-pin base with anodes on top caps*'''4094A''' = STC '''3B/851A''' – 6 MHz, 85 W Directly heated power triode, 10 V/3.25 A filament, 4-pin base*'''4097A''' – 2 MHz, 35 W Directly heated power triode, 6 V/1.1 A filament, 4-pin base*'''4101D/E/G''' (Western Electric '''101D/F/J/L/M''') – 285 mW Directly heated power triode, 4.5 V/1 A filament, 4-pin Bayonet base*'''4102D/E/G''' (WE '''102D/E/F/G/L''') – Directly heated triode, 2 V/970 mA filament, 4-pin Bayonet base*'''4104D/E/G''' (WE '''104D''') – 300 mW Directly heated power triode, 4.4 V/970 mA filament, 4-pin Bayonet base*'''4205E''' = WE '''205E''', '''M4205E''' (reduced anode and grid secondary emission) – 15 MHz, 15 W Directly heated power triode, 4.5 V/1.6 A filament, 4-pin Bayonet base with offset pin*'''4211D''' = WE '''211D''', '''4211E''' (1 µH [[Choke (electronics)|chokes]] in grid and anode leads to prevent VHF oscillation) – 65 W Directly heated power triode, 10 V/3 A filament, 4-pin Bayonet base; replaced by 4242A*'''4212D''' = WE '''212D''' (200 W Oxidized Nickel anode), '''4212E''' = STC '''3C/270A''' (275 W Molybdenum anode) – 1.5 MHz Directly heated power triode, 14 V/6 A filament, 4-pin base*'''4215A''' = WE '''215A''' – Directly heated miniature AF/IF/detector triode, 1.1 V/250 mA filament, ''Peanut'' 4-stub base*'''4242A''' = WE '''242A''' = STC '''3B/850A''' – 6 MHz, 85 W Directly heated power triode, 10 V/3.25 A filament, 4-pin Bayonet base; 4211D with a Molybdenum anode*'''4251A''' = WE '''251A''', '''4251AX''' – 30 MHz, 1 kW Directly heated power triode, 10 V/16 A filament, stud connections*'''4264A''' = WE '''264A''' = STC '''3A/135A''' – Directly heated triode, 1.5 V/300 mA filament, 4-pin base*'''4270A''' = WE '''270A''' = STC '''3C/350E''' – 7.5 MHz, 350 W Directly heated power triode, 10 V/9.75 A filament, 3-pin base with anode on top stud*'''4275A''' = WE '''275A''' = STC '''3B/170A''' – 17 W Directly heated power triode, 5 V/1.2 A filament, 4-pin base*'''4279A''' = WE '''279A''' – 20 MHz, 1.2 kW Directly heated power triode, 10 V/21 A filament, stud connections*'''4300A''' = WE '''300A''' = STC '''3B/400A''' – 40 W Directly heated power triode, 5 V/1.2 A filament, 4-pin base*'''4304B''' = WE '''304B''' ('''3B/504B''', UX4 base), '''4304BB''' (European 4-pin base) – 100 MHz, 50 W Directly heated power triode, 7.5 V/3.25 A filament, anode and grid on top stud*'''4307A''' = WE '''307A''' – 40 MHz, 15 W Directly heated power pentode, 5.5 V/1 A filament; remotely similar to the indirectly heated [[#807|{{color|Green|807}}]] beam power tetrode. Both types have an ST-16 envelope with an anode top cap and a UY5 base [[File:Commons-logo.svg|16x16px|link=:Commons:Category:SY4307A|class=noviewer|alt=]]*'''4308B''' = WE '''308B''' – 1.5 MHz, 250 W Directly heated power triode, 14 V/6 A filament, 4-pin base*'''4316A''' = WE '''316A''' – 600 MHz, 30 W Directly heated [[Acorn tube|''Doorknob''-type]] UHF power triode, 2 V/3.65 A filament*'''4356A''' = WE '''356A''' = STC '''3B/505E''' – 100 MHz, 50 W Directly heated power triode, center-tapped 5 V/5 A filament, 4-pin base with anode on top stud*'''291''' (12.6 V/300 mA heater/filament), '''293''' (6.3 V/600 mA heater/filament), '''295''' (2.5 V/4 A heater/filament) – ''[[Triple-twin|Triple-Twin]]'' indirectly heated AF signal triode + half-indirectly heated ''zero bias'' power triode, internally connected as a cathode follower like today's [[Darlington transistor]]s; cf. 2B6, 6B5, 6N6G (not to be confused with the 293A resp. 295A):*[[Diode]], vacuum or gas-discharge or Mercury-arc [[rectifier]]:*''Glow modulator tube'', a linear gas-discharge light source for rotating-drum [[FAX]] receivers, [[Optical sound|film soundtrack]] recording, etc.:*[[Voltage-regulator tube]]:*[[Gaseous ionization detector|Radiation counter]] ([[Geiger–Müller tube|Geiger-Müller]]) tube:*[[Spark gap]], [[Electric arc|arc-discharge]] tubeOptional preceding letter(s):<ref name="Stokes70Years" />{{rp|198ff}}*'''M''' –:#A 4-volts AC, indirectly heated ("Mains Operated") tube, and/or:#A [[#MOMP|{{color|Green|Marconi tube with an M-P designation}}]]*'''V''' – Vari-μ = remote-cutoff tube*'''T''' – ([[Thyratron|Gas/vapor-filled]]) triode*'''U''' – Gas/vapor-discharge or vacuum [[rectifier]]—'''Radiation detectors'''::One or more letters::*'''А''' ⟼ '''A''' – [[Alpha particle|α rays]]:*'''Б''' ⟼ '''B''' – [[Beta particle|β rays]]:*'''Г''' ⟼ '''G''' – [[Gamma ray|γ rays]]:*'''Р''' ⟼ '''R''' – [[X-ray]]s*No [[getter]] to minimize internal [[Leakage (electronics)|leakage currents]] via getter material condensed on the inside walls of [[electrometer]] tubes*'''1K125CA''' – 1.25 W, 3.7 to 4.4 GHz, waveguide output Reflex Klystron*Gold-plated grid wires to prevent [[secondary emission]]*'''205D/E/F''' – 14 W, Directly heated AF or modulator power triode, 4.5 V/1.6 A filament, 4-pin base<ref>{{cite web |url=https://frank.pocnet.net/sheets/136/2/205D.pdf |title=205D Vacuum tube |publisher=[[Western Electric]] |year=1936 |access-date=14 June 2021}}<!-- http://www.4tubes.com/1-DATASHEETS/SCANS-Original/!5-Numbers-100--999/205D_WE_Datasheet.pdf --> • {{cite web |url=https://frank.pocnet.net/sheets/136/2/205E.pdf |title=205E Vacuum tube |publisher=[[Western Electric]] |year=1936 |access-date=20 June 2021}} • {{cite web |url=http://westernelectric.sectorlink.org/static/library/specifications/tubes/205E.pdf |title=205E Vacuum tube |publisher=[[Western Electric]] |date=1 February 1933 |access-date=20 June 2021}} • {{cite web |url=http://westernelectric.sectorlink.org/static/library/specifications/tubes/205F.pdf |title=205F Vacuum tube |publisher=[[Western Electric]] |date=January 1950 |access-date=20 June 2021}}</ref>*'''211/B/C/D''' – 260 W, Directly heated AF or modulator power triode now favored by audiophiles, U4J Jumbo base<ref>{{cite web |url=https://frank.pocnet.net/sheets/049/2/211.pdf |title=211 Power triode |publisher=[[RCA]] |date=1 May 1950 |access-date=12 June 2021}} • {{cite web |url=https://frank.pocnet.net/sheets/084/h/HF120.pdf |title=HF120/211B Transmitting Tube |publisher=[[Amperex Electronic|Amperex]] |date=April 1948 |access-date=20 June 2021}} • {{cite web |url=https://frank.pocnet.net/sheets/111/2/211C.pdf |title=HF130/211C Transmitting Tube |publisher=Amperex |access-date=20 June 2021}} •{{cite web |url=http://westernelectric.sectorlink.org/static/library/specifications/tubes/211D.pdf |title=211D Vacuum tube |publisher=[[Western Electric]] |access-date=20 June 2021}}</ref>*'''212D/E''' – 250 W, Directly heated RF transmitter power triode, 4-pin base<ref>{{cite web |url=http://westernelectric.sectorlink.org/static/library/specifications/tubes/212D.pdf |title=212D Vacuum tube |publisher=[[Western Electric]] |date=1 May 1933 |access-date=20 June 2021}} • {{cite web |url=http://www.4tubes.com/1-DATASHEETS/SCANS-Original/!5-Numbers-100--999/212E_WE_Datasheet.pdf |title=212E Vacuum tube |publisher=[[Western Electric]] |access-date=12 June 2021}}</ref>*'''231D''', '''257A''' (control grid on top cap) – Directly heated AF triode, 3.1 V/60 mA filament, 4-pin base<ref>{{cite web |url=https://frank.pocnet.net/sheets/136/2/231D.pdf |title=231D Vacuum tube |publisher=[[Western Electric]] |year=1936 |access-date=20 June 2021}} • {{cite web |url=http://westernelectric.sectorlink.org/static/library/specifications/tubes/257A.pdf |title=257A Vacuum tube |publisher=[[Western Electric]] |access-date=20 June 2021}}</ref>*'''240A/B''' – 10 kW, Water-cooled, directly heated RF transmitter power triode<ref>{{cite web |url=http://n6jv.com/museum/data/WE/archives/240a(34).pdf |title=240A Vacuum tube |publisher=[[Western Electric]] |year=1936 |access-date=21 June 2021}} • {{cite web |url=http://n6jv.com/museum/data/WE/archives/240b(36).pdf |title=240B Vacuum tube |publisher=[[Western Electric]] |year=1936 |access-date=21 June 2021}}</ref>*'''241B''' – 275 W, Directly heated RF/AF/modulator power triode, 3-pin base, anode on top cap<ref>{{cite web |url=http://westernelectric.sectorlink.org/static/library/specifications/tubes/241B.pdf |title=241B Vacuum tube |publisher=[[Western Electric]] |access-date=20 June 2021}} • {{cite web |url=https://frank.pocnet.net/sheets/026/2/241B.pdf |title=ML-241B Description & Ratings |publisher=[[Machlett Laboratories]] |date=August 1950 |access-date=12 June 2021}}</ref>*'''242A/B/C''' – Directly heated AF/modulator power triode, 4-pin base<ref>{{cite web |url=https://frank.pocnet.net/sheets/136/2/242A.pdf |title=242A Vacuum tube |publisher=[[Western Electric]] |year=1936 |access-date=12 June 2021}} • {{cite web |url=https://frank.pocnet.net/sheets/136/2/242B.pdf |title=242B Vacuum tube |publisher=[[Western Electric]] |year=1936 |access-date=20 June 2021}} • {{cite web |url=http://westernelectric.sectorlink.org/static/library/specifications/tubes/242C.pdf |title=242C Vacuum tube |publisher=[[Western Electric]] |access-date=20 June 2021}}</ref>*'''244A''', '''247A''' – Indirectly heated, low-power AF triode, 2 V/1.6 A heater, 5-pin base<ref>{{cite web |url=https://frank.pocnet.net/sheets/136/2/244A.pdf |title=244A Vacuum tube |publisher=[[Western Electric]] |access-date=20 June 2021}} • {{cite web |url=http://n6jv.com/museum/data/WE/archives/247a.pdf |title=247A Vacuum tube |publisher=Western Electric |access-date=20 June 2021}} • {{cite web |url=https://frank.pocnet.net/sheets/136/2/247A.pdf |title=247A Vacuum tube |publisher=[[Western Electric]] |access-date=20 June 2021}}</ref>*'''245A''' – Indirectly heated RF/AF tetrode, 2 V/1.6 A heater, 5-pin base, control grid on top cap<ref>{{cite web |url=http://westernelectric.sectorlink.org/static/library/specifications/tubes/245A.pdf |title=245A Electron Tube |publisher=[[Western Electric]] |access-date=20 June 2021}}</ref>*'''246A''' – Directly heated RF/AF tetrode, 3.3 V/100 mA filament, 4-pin base, control grid on top cap<ref>{{cite web |url=https://frank.pocnet.net/sheets/136/2/246A.pdf |title=246A Electron Tube |publisher=[[Western Electric]] |date=1 May 1933 |access-date=20 June 2021}}</ref>*'''251A''' – 600 W, Directly heated AF/modulator power triode, special wall mount construction<ref>{{cite web |url=https://frank.pocnet.net/sheets/136/2/251A.pdf |title=251A Vacuum tube |publisher=[[Western Electric]] |access-date=20 June 2021}}</ref>*'''252A''' – Directly heated AF power triode, 4-pin base<ref>{{cite web |url=https://frank.pocnet.net/sheets/136/2/252A.pdf |title=252A Vacuum tube |publisher=[[Western Electric]] |access-date=12 June 2021}}</ref>*'''256A''' – 325 V, 75 mA Argon thyratron, 5-pin base;<ref>{{cite web |url=https://frank.pocnet.net/sheets/136/2/256A.pdf |publisher=[[Western Electric]] |title=256A Vacuum Tube |access-date=20 June 2021}}</ref>*'''259A/B''' (Sharp-cutoff), '''283A''' (Remote-cutoff) – Indirectly heated RF/AF tetrode, 2 V/1 A heater, 5-pin base, control grid on top cap<ref>{{cite web |url=https://frank.pocnet.net/sheets/136/2/259A.pdf |title=259A Vacuum Tube |publisher=[[Western Electric]] |access-date=20 June 2021}} • {{cite web |url=https://frank.pocnet.net/sheets/136/2/259B.pdf |title=259B Vacuum Tube |publisher=[[Western Electric]] |access-date=20 June 2021}} • {{cite web |url=https://frank.pocnet.net/sheets/136/2/283A.pdf |title=283A Vacuum Tube |publisher=[[Western Electric]] |access-date=20 June 2021}}</ref>*'''260A''' – 100 W Directly heated RF power tetrode, 4-pin base, control grid and anode on lateral and top wires<ref>{{cite web |url=http://n6jv.com/museum/data/WE/archives/260a(36).pdf |title=260A Vacuum tube |publisher=[[Western Electric]] |access-date=21 June 2021}}</ref>*'''262A/B''' (4-pin base), '''347A/B''' (Octal base) – Low-microphonics, low-noise, low-hum AF power triode, control grid on top cap<ref>{{cite web |url=http://westernelectric.sectorlink.org/static/library/specifications/tubes/262A.pdf |title=262A Vacuum tube |publisher=[[Western Electric]] |access-date=12 June 2021}} • {{cite web |url=http://westernelectric.sectorlink.org/static/library/specifications/tubes/262B.pdf |title=262B and 347B Vacuum tubes |publisher=[[Western Electric]] |access-date=12 June 2021}}</ref><ref>{{cite web |url=http://www.4tubes.com/1-DATASHEETS/SCANS-Original/!5-Numbers-100--999/347A_WE_Datasheet.pdf |title=347A Triode |publisher=[[Western Electric]] |date=November 1947 |access-date=11 June 2021}}</ref>*'''264A/B/C''' – Directly heated low-microphonics AF triode, 1.5 V/300 mA filament, 4-pin base<ref>{{cite web |url=http://westernelectric.sectorlink.org/static/library/specifications/tubes/264B.pdf |title=264B Vacuum tube |publisher=[[Western Electric]] |access-date=20 June 2021}} • {{cite web |url=https://frank.pocnet.net/sheets/136/2/264B.pdf |title=264B Vacuum tube |publisher=[[Western Electric]] |access-date=20 June 2021}} • {{cite web |url=http://westernelectric.sectorlink.org/static/library/specifications/tubes/264C.pdf |title=264C Vacuum tube |publisher=[[Western Electric]] |access-date=20 June 2021}}</ref>*'''267B''' (2-pin base), '''319A''' (4-pin base) – Directly heated half-wave vacuum rectifiers, anode on top cap<ref>{{cite web |url=http://westernelectric.sectorlink.org/static/library/specifications/tubes/267B.pdf |title=267B and 319A Vacuum tubes |publisher=[[Western Electric]] |access-date=20 June 2021}}</ref>*'''269A''' – 275 V, 20 mA Argon thyratron, 4-pin base;<ref>{{cite web |url=https://frank.pocnet.net/sheets/136/2/269A.pdf |publisher=[[Western Electric]] |title=269A Vacuum Tube |access-date=20 June 2021}}</ref>*'''271A''' – Directly heated AF power triode, 5-pin base<ref>{{cite web |url=https://frank.pocnet.net/sheets/136/2/271A.pdf |title=271A Vacuum tube |publisher=[[Western Electric]] |access-date=12 June 2021}}</ref>*'''272A''' – Indirectly heated, low-power AF triode, 10 V/430 mA heater, 5-pin base<ref>{{cite web |url=https://frank.pocnet.net/sheets/136/2/272A.pdf |title=272A Vacuum tube |publisher=Western Electric |access-date=20 June 2021}}</ref>*'''277A''' – 350 V, 500 mA Argon thyratron, 5-pin base;<ref>{{cite web |url=http://westernelectric.sectorlink.org/static/library/specifications/tubes/277A.pdf |publisher=[[Western Electric]] |title=277A Vacuum Tube |access-date=20 June 2021}}</ref>*'''278A''' – 800 W Directly heated RF power tetrode, special wall mount construction<ref>{{cite web |url=http://n6jv.com/museum/data/WE/archives/278a(37).pdf |title=278A Vacuum tube |publisher=[[Western Electric]] |access-date=21 June 2021}}</ref>*'''281A''' – Directly heated moderate-power AF tetrode with a [[Tetrode#Space charge grid tube|space charge grid]], 5 V/1.6 A filament, 5-pin base<ref>{{cite web |url=http://westernelectric.sectorlink.org/static/library/specifications/tubes/281A.pdf |publisher=[[Western Electric]] |title=281A Vacuum Tube |access-date=20 June 2021}}</ref>*'''282A''' – 70 W Directly heated RF power tetrode, 4-pin base, anode on top cap<ref>{{cite web |url=https://frank.pocnet.net/sheets/136/2/282A.pdf |title=282A Vacuum tube |publisher=[[Western Electric]] |access-date=20 June 2021}}</ref>*'''284A''' – 85 W, Directly heated RF/AF/modulator power triode, 4-pin base<ref>{{cite web |url=http://westernelectric.sectorlink.org/static/library/specifications/tubes/284A.pdf |title=284A Vacuum tube |publisher=[[Western Electric]] |access-date=20 June 2021}} • {{cite web |url=http://westernelectric.sectorlink.org/static/library/specifications/tubes/284D.pdf |title=284D Vacuum tube |publisher=[[Western Electric]] |access-date=20 June 2021}}</ref>*'''285A''' – Low-power AF pentode, 2 V/1 A heater, 5-pin base<ref>{{cite web |url=https://frank.pocnet.net/sheets/136/2/285A.pdf |title=285A Vacuum tube |publisher=[[Western Electric]] |access-date=11 June 2021}}</ref>*'''286A''' – Remote-cutoff IF/AF pentode, 6-pin base, #1 grid on top cap<ref>{{cite web |url=https://frank.pocnet.net/sheets/136/2/286A.pdf |title=286A Vacuum tube |publisher=[[Western Electric]] |access-date=12 June 2021}}</ref>*'''287A''' – 1.5 A, Mercury-vapor [[Thyratron]]<ref name="WE287A_323A_354A_355A">{{cite web |url=https://frank.pocnet.net/sheets/080/2/287A.pdf |title=287A, 323A, 354A, 355A Vacuum tubes |publisher=[[Western Electric]] |year=1941 |access-date=12 June 2021}}</ref>*'''297A''' – 250 V, 10 mA Argon thyratron, 4-pin base<ref>{{cite web |url=http://westernelectric.sectorlink.org/static/library/specifications/tubes/297A.pdf |publisher=[[Western Electric]] |title=297A Vacuum Tube |access-date=20 June 2021}}</ref>*'''301A''' – 1.8 kV, 1 A Full-wave [[Mercury-arc valve|Mercury-vapor rectifier]], 4-pin base<ref>{{cite web |url=http://westernelectric.sectorlink.org/static/library/specifications/tubes/301A.pdf |title=301A Vacuum tube |publisher=[[Western Electric]] |access-date=19 June 2021}}</ref>*'''308B''' – 250 W Directly heated AF power triode, 14 V/6 A filament, 4-pin base<ref>{{cite web |url=http://n6jv.com/museum/data/WE/archives/308b(36).pdf |publisher=[[Western Electric]] |title=308B Vacuum Tube |year=1936 |access-date=5 June 2021}}</ref>*'''310B''' – Sharp-cutoff RF/AF pentode, 10 V/320 mA heater<ref>{{cite web |url=http://www.4tubes.com/1-DATASHEETS/SCANS-Original/!5-Numbers-100--999/310B_WE_Datasheet.pdf |title=310B Electron tube |publisher=[[Western Electric]] |date=February 1956 |access-date=11 June 2021}}</ref>*'''311A/B''' – Sharp-cutoff RF/AF pentode<ref>{{cite web |url=http://www.4tubes.com/1-DATASHEETS/SCANS-Original/!5-Numbers-100--999/311A_WE_Datasheet.pdf |title=311A Electron tube |publisher=[[Western Electric]] |date=May 1948 |access-date=11 June 2021}} • {{cite web |url=http://www.4tubes.com/1-DATASHEETS/SCANS-Original/!5-Numbers-100--999/311B_WE_Datasheet.pdf |title=311B Electron tube |publisher=[[Western Electric]] |date=October 1960 |access-date=11 June 2021}}</ref>*'''312A''' – 50 W Directly heated RF/AF power pentode, center-tapped 10 V/3.8 A filament, 6-pin base, anode on top cap<ref>{{cite web |url=http://n6jv.com/museum/data/WE/archives/312a(37).pdf |publisher=[[Western Electric]] |title=312A Vacuum Tube |year=1937 |access-date=5 June 2021}}</ref>*'''313A''' – Gas-filled, cold-dual-cathode trigger tube, 4-pin base, usable as thyratron, as voltage regulator or as rectifier<ref>{{cite web |url=http://www.4tubes.com/1-DATASHEETS/SCANS-Original/!5-Numbers-100--999/313A_WE_Datasheet.pdf |title=313A Vacuum tube |publisher=[[Western Electric]] |year=1936 |access-date=11 June 2021}}</ref>*'''314A''' – 300 V, 2.5 A Full-wave Mercury-vapor rectifier, 4-pin base<ref>{{cite web |url=http://westernelectric.sectorlink.org/static/library/specifications/tubes/314A.pdf |title=314A Vacuum tube |publisher=[[Western Electric]] |access-date=19 June 2021}}</ref>*'''315A''' – 12.5 kV, 2 A Half-wave Mercury-vapor rectifier<ref>{{cite web |url=http://westernelectric.sectorlink.org/static/library/specifications/tubes/315A.pdf |title=315A Vacuum tube |publisher=[[Western Electric]] |access-date=19 June 2021}}</ref>*'''322A''' (Western Electric), '''332A''' (WE, suppressor grid internally tied to filament center tap) – 125 W Directly heated RF/AF power pentode, 5-pin base, anode on top cap<ref>{{cite web |url=http://n6jv.com/museum/data/WE/archives/322a(39).pdf |publisher=[[Western Electric]] |title=322A Vacuum Tube |year=1939 |access-date=5 June 2021}}</ref>*'''328A''' – 310A with a 7.5 V/425 mA heater<ref>{{cite web |url=http://www.4tubes.com/1-DATASHEETS/SCANS-Original/!5-Numbers-100--999/328A_1937_WE_Datasheet.pdf |title=328A Electron tube |publisher=[[Western Electric]] |year=1937 |access-date=11 June 2021}}</ref>*'''329A''' (Western Electric) – Sharp-cutoff RF/AF pentode<ref name="WE311A_329A" />*'''331A''' – 125 W, 30 MHz Directly heated RF/AF power triode, 10 V/3.25 A filament, 4-pin base, anode on top cap<ref>{{cite web |url=http://n6jv.com/museum/data/WE/archives/331a(39).pdf |publisher=[[Western Electric]] |title=331A Vacuum Tube |year=1939 |access-date=5 June 2021}}</ref>*'''333A''' – Gas-filled cold-cathode trigger triode, one starter electrode, flying leads with lugs<ref>{{cite web |url=http://www.4tubes.com/1-DATASHEETS/SCANS-Original/!5-Numbers-100--999/333A_WE_Datasheet.pdf |title=333A Electron tube |publisher=[[Western Electric]] |date=December 1947 |access-date=11 June 2021}}</ref>*'''336A''' – 12 W Indirectly heated AF power pentode, 6-pin base<ref>{{cite web |url=http://www.4tubes.com/1-DATASHEETS/SCANS-Original/!5-Numbers-100--999/336A_WE_Datasheet.pdf |title=336A Pentode |publisher=[[Western Electric]] |date=January 1948 |access-date=11 June 2021}}</ref>*'''337A''' – Remote-cutoff RF/AF pentode<ref>{{cite web |url=http://www.4tubes.com/1-DATASHEETS/SCANS-Original/!5-Numbers-100--999/337A_WE_Datasheet.pdf |title=337A Electron tube |publisher=[[Western Electric]] |date=March 1951 |access-date=11 June 2021}}</ref>*'''338A''' – 325 V, 100 mA Argon/Mercury-vapor thyratron, 5-pin base;<ref>{{cite web |url=http://westernelectric.sectorlink.org/static/library/specifications/tubes/338A.pdf |publisher=[[Western Electric]] |title=338A Vacuum Tube |year=1962 |access-date=19 June 2021}}</ref>*'''340A''' – 25 kW, 4 MHz Water-cooled, directly heated power triode<ref>{{cite web |url=http://n6jv.com/museum/data/WE/archives/340a(39).pdf |publisher=[[Western Electric]] |title=340A Vacuum Tube |year=1939 |access-date=5 June 2021}}</ref>*'''345A''' (5-pin base), '''351A''' (6-pin base) – Directly heated full-wave vacuum rectifiers<ref>{{cite web |url=http://westernelectric.sectorlink.org/static/library/specifications/tubes/345A.pdf |title=345A/351A Vacuum tubes |publisher=[[Western Electric]] |access-date=19 June 2021}}</ref>*'''346B/C''' – Gas-filled cold-cathode trigger triode, one starter electrode, below {{cvt|5|uCi|kBq|lk=on}} of [[Krypton-85|<sup>85</sup>Kr]] keep-alive ([[half-life]]: 10.756 years), 4-pin base<ref>{{cite web |url=https://frank.pocnet.net/sheets/084/3/346B.pdf |publisher=[[Western Electric]] |title=346B Electron tube |date=April 1956 |access-date=12 June 2021}}<!-- http://www.4tubes.com/1-DATASHEETS/SCANS-Original/!5-Numbers-100--999/346B_WE_Datasheet.pdf --> • {{cite web |url=https://frank.pocnet.net/sheets/084/3/346C.pdf |publisher=Western Electric |title=346C Electron tube |year=1962 |access-date=12 June 2021}}<!-- http://www.4tubes.com/1-DATASHEETS/SCANS-Original/!5-Numbers-100--999/346C_WE_Datasheet.pdf --></ref>*'''349A''' – 12 W Indirectly heated AF power pentode, Octal base<ref>{{cite web |url=http://www.4tubes.com/1-DATASHEETS/SCANS-Original/!5-Numbers-100--999/349A_WE_Datasheet.pdf |title=349A Pentode |publisher=[[Western Electric]] |date=January 1948 |access-date=11 June 2021}}</ref>*'''350B''' – 27 W Indirectly heated AF beam power tetrode, 6.3 V/1.6 A heater<ref>{{cite web |url=http://www.4tubes.com/1-DATASHEETS/SCANS-Original/!5-Numbers-100--999/350B_WE_Datasheet.pdf |title=350B Tetrode |publisher=[[Western Electric]] |date=March 1949 |access-date=11 June 2021}}</ref>*'''352A''' – Indirectly heated dual diode + triode, 6-pin base with triode grid on top cap<ref>{{cite web |url=http://www.4tubes.com/1-DATASHEETS/SCANS-Original/!5-Numbers-100--999/352A_WE_Datasheet.pdf |title=352A Vacuum Tube |publisher=[[Western Electric]] |year=1939 |access-date=11 June 2021}}</ref>*'''353A''' – Gas-filled cold-cathode trigger triode, split starter electrode, <5 µCi of <sup>85</sup>Kr keep-alive, 4-pin base<ref>{{cite web |url=http://www.4tubes.com/1-DATASHEETS/SCANS-Original/!5-Numbers-100--999/353A_WE_Datasheet.pdf |title=353A Electron Tube |publisher=[[Western Electric]] |year=1962 |access-date=11 June 2021}}</ref>*'''356A''' (Western Electric) – 50 W, 100 MHz Directly heated RF/AF power triode, 5 V/5 A filament, 4-pin base, anode on top cap<ref>{{cite web |url=http://n6jv.com/museum/data/WE/archives/356a.pdf |publisher=[[Western Electric]] |title=356A Vacuum Tube |year=1939 |access-date=14 June 2021}}</ref>*'''358A''' – Gas-filled cold-cathode visual indicator, <5 µCi of <sup>85</sup>Kr keep-alive, 2 flying leads, for use in telephone circuits<ref>{{cite web |url=http://www.4tubes.com/1-DATASHEETS/SCANS-Original/!5-Numbers-100--999/358A_WE_Datasheet.pdf |title=358A Electron Tube |publisher=[[Western Electric]] |year=1962 |access-date=11 June 2021}}</ref>*'''359A''' – Gas-filled cold-cathode trigger triode, one starter electrode, <5 µCi of <sup>85</sup>Kr keep-alive, 3 flying leads<ref>{{cite web |url=http://www.4tubes.com/1-DATASHEETS/SCANS-Original/!5-Numbers-100--999/359A_WE_Datasheet.pdf |title=359A Electron tube data sheet |publisher=[[Western Electric]] |year=1962 |access-date=11 June 2021}}</ref>*'''363A''' – 350 W, 85 MHz Directly heated VHF power pentode, center-tapped 10 V/10 A filament, 6-pin base, anode on top cap<ref>{{cite web |url=http://n6jv.com/museum/data/WE/archives/363a(41).pdf |publisher=[[Western Electric]] |title=363A Vacuum Tube |year=1941 |access-date=5 June 2021}}</ref>*'''364A''' – 50 W, 150 MHz Directly heated VHF power triode, center-tapped 5 V/5 A filament, 5-pin base, anode on two top caps<ref>{{cite web |url=http://n6jv.com/museum/data/WE/archives/364a(41).pdf |publisher=[[Western Electric]] |title=364A Vacuum Tube |year=1941 |access-date=5 June 2021}}</ref>*'''372A''' – Gas-filled cold-cathode trigger triode, one starter electrode, flying leads with lugs<ref>{{cite web |url=http://www.4tubes.com/1-DATASHEETS/SCANS-Original/!5-Numbers-100--999/372A_WE_Datasheet.pdf |title=372A Electron tube data sheet |publisher=[[Western Electric]] |date=December 1947 |access-date=11 June 2021}}</ref>*'''373A''' – Directly heated sharp-cutoff RF/AF pentode, 2 V/250 mA filament, Octal base<ref>{{cite web |url=http://www.4tubes.com/1-DATASHEETS/SCANS-Original/!5-Numbers-100--999/373A_WE_Datasheet.pdf |title=373A Pentode |publisher=[[Western Electric]] |date=November 1949 |access-date=11 June 2021}}</ref>*'''374A''' – 4.8 W Directly heated power pentode, 3 V/530 mA filament, Octal base<ref>{{cite web |url=http://www.4tubes.com/1-DATASHEETS/SCANS-Original/!5-Numbers-100--999/374A_WE_Datasheet.pdf |title=374A Pentode |publisher=[[Western Electric]] |date=November 1949 |access-date=11 June 2021}}</ref>*'''375A''' – 6 W Indirectly heated low (48-130 V) anode voltage AF beam power tetrode, 20 V/320 mA heater<ref>{{cite web |url=http://westernelectric.sectorlink.org/static/library/specifications/tubes/375A.pdf |title=375A Vacuum Tube |publisher=[[Western Electric]] |date=May 1950 |access-date=19 June 2021}}</ref>*'''384A''' (Flying leads), '''385A''' (Octal base) – Indirectly heated ''Mushroom'' or ''Little Doorknob'' UHF pentode<ref>{{cite web |url=http://www.4tubes.com/1-DATASHEETS/SCANS-Original/!5-Numbers-100--999/384A_385A_WE_Datasheet.pdf |title=384A Electron Tube |publisher=[[Western Electric]] |year=1941 |access-date=11 June 2021}}</ref>*'''394A''' – 1.25 kV, 640 mA Argon/Mercury-vapor thyratron, Octal base;<ref>{{cite web |url=http://westernelectric.sectorlink.org/static/library/specifications/tubes/394A.pdf |title=394A Electron Tube |publisher=[[Western Electric]] |date=October 1962 |access-date=19 June 2021}}</ref>*'''405A''' – Gas-filled cold-cathode trigger triode, one starter anode, flying leads with lugs<ref>{{cite web |url=http://www.4tubes.com/1-DATASHEETS/SCANS-Original/!5-Numbers-100--999/405A_WE_Datasheet.pdf |title=405A Cold cathode |publisher=[[Western Electric]] |date=January 1950 |access-date=12 June 2021}}</ref>*'''409A''' = '''6AS6''' – Pentode with a fine-pitched suppressor grid which could serve as a second control grid. Used in radar ''[[phantastron]]'' circuits<ref>{{cite web |url=http://www.4tubes.com/1-DATASHEETS/SCANS-Original/!5-Numbers-100--999/409A_WE_Datasheet.pdf |title=6AS6/409A Electron Tube |publisher=[[Western Electric]] |date=May 1948 |access-date=12 June 2021}}</ref>*'''410A''' – 1.5 kV, 8 A Mercury-vapor thyratron<ref>{{cite web |url=http://www.4tubes.com/1-DATASHEETS/SCANS-Original/!5-Numbers-100--999/410A_WE_Datasheet.pdf |title=410A Electron Tube |publisher=[[Western Electric]] |date=October 1962 |access-date=12 June 2021}}</ref>*'''411A''' (Western Electric) – Gas-filled cold-cathode trigger triode, one starter anode + one starter cathode, flying leads with lugs<ref>{{cite web |url=http://www.4tubes.com/1-DATASHEETS/SCANS-Original/!5-Numbers-100--999/411A_WE_Datasheet.pdf |title=405A Cold cathode |publisher=[[Western Electric]] |date=January 1950 |access-date=12 June 2021}}</ref>*'''412A''' – Full-wave rectifier, Noval base<ref>{{cite web |url=http://www.4tubes.com/1-DATASHEETS/SCANS-Original/!5-Numbers-100--999/412A_WE_Datasheet.pdf |title=412A Electron Tube |publisher=[[Western Electric]] |date=January 1949 |access-date=12 June 2021}}</ref>*'''413A''' – Gas-filled cold-cathode trigger triode, no starter electrode, [[Radium bromide|RaBr<sub>2</sub>]] keep-alive, 2-pin base<ref>{{cite web |url=http://www.4tubes.com/1-DATASHEETS/SCANS-Original/!5-Numbers-100--999/413A_WE_Datasheet.pdf |title=413A Electron Tube |publisher=[[Western Electric]] |date=April 1956 |access-date=12 June 2021}}</ref>*'''414A''' – Pentode, Miniature 7-pin base<ref>{{cite web |url=http://www.4tubes.com/1-DATASHEETS/SCANS-Original/!5-Numbers-100--999/414A_WE_Datasheet.pdf |title=414A Electron Tube |publisher=[[Western Electric]] |date=May 1949 |access-date=12 June 2021}}</ref>*'''415A''' – UHF Pentode, Miniature 7-pin base<ref>{{cite web |url=http://westernelectric.sectorlink.org/static/library/specifications/tubes/415A.pdf |title=415A Miniature UHF Pentode |publisher=[[Western Electric]] |date=April 1949 |access-date=19 June 2021}}</ref>*'''420A''' – High-mu dual triode with a center-tapped 12.6 resp. 6.3 V heater, Noval base, for use as DC amplifier<ref>{{cite web |url=http://www.4tubes.com/1-DATASHEETS/SCANS-Original/!5-Numbers-100--999/420A_WE_Datasheet.pdf |title=420A Electron Tube |publisher=[[Western Electric]] |date=June 1962 |access-date=12 June 2021}}</ref>*'''421A''' = '''5998''' – Dual power triodes for use as series regulator in DC power supplies<ref>{{cite web |url=http://www.4tubes.com/1-DATASHEETS/SCANS-Original/!5-Numbers-100--999/421A_WE_Datasheet.pdf |title=421A Electron Tube |publisher=[[Western Electric]] |date=October 1953 |access-date=12 June 2021}}</ref>*'''422A''' – Full-wave rectifier, Octal base<ref>{{cite web |url=http://www.4tubes.com/1-DATASHEETS/SCANS-Original/!5-Numbers-100--999/422A_WE_Datasheet.pdf |title=412A Electron Tube |publisher=[[Western Electric]] |date=October 1952 |access-date=12 June 2021}}</ref>*'''425A''' – Gas-filled cold-cathode trigger triode, one starter anode + one starter cathode, flying leads with lugs<ref>{{cite web |url=http://www.4tubes.com/1-DATASHEETS/SCANS-Original/!5-Numbers-100--999/425A_WE_Datasheet.pdf |title=425A Cold cathode |publisher=[[Western Electric]] |date=June 1962 |access-date=12 June 2021}}</ref>*'''426A''' – Gas-filled cold-cathode trigger triode, one starter electrode, <5 µCi of <sup>85</sup>Kr keep-alive, flying leads with lugs<ref>{{cite web |url=http://www.4tubes.com/1-DATASHEETS/SCANS-Original/!5-Numbers-100--999/426A_WE_Datasheet.pdf |title=426A Cold cathode |publisher=[[Western Electric]] |date=January 1962 |access-date=12 June 2021}}</ref>*'''429A''' – 12 W Indirectly heated AF beam power tetrode, 20 V/140 mA heater<ref>{{cite web |url=http://www.4tubes.com/1-DATASHEETS/SCANS-Original/!5-Numbers-100--999/429A_WE_Datasheet.pdf |title=429A Electron Tube |publisher=[[Western Electric]] |date=February 1961 |access-date=11 June 2021}}</ref>*'''432A''' – 100 V, 4 to 8 mA Voltage-regulator tube with a keep-alive (primer) electrode, Noval base<ref>{{cite web |url=http://www.4tubes.com/1-DATASHEETS/SCANS-Original/!5-Numbers-100--999/432A_WE_Datasheet.pdf |title=432A Electron Tube |publisher=[[Western Electric]] |date=October 1950 |access-date=12 June 2021}}</ref>*'''435A''' (Input), '''436A''' (Intermediate), '''437A''' (Output) – Tetrodes<ref>{{cite web |url=http://www.4tubes.com/1-DATASHEETS/SCANS-Original/!5-Numbers-100--999/435A_WE_Datasheet.pdf |title=435A Electron Tube |publisher=[[Western Electric]] |date=June 1954 |access-date=12 June 2021}} • {{cite web |url=http://www.4tubes.com/1-DATASHEETS/SCANS-Original/!5-Numbers-100--999/436A_WE_Datasheet.pdf |title=436A Electron Tube |publisher=[[Western Electric]] |date=May 1963 |access-date=12 June 2021}} • {{cite web |url=http://www.4tubes.com/1-DATASHEETS/SCANS-Original/!5-Numbers-100--999/437A_WE_Datasheet.pdf |title=437A Electron Tube |publisher=[[Western Electric]] |date=October 1955 |access-date=12 June 2021}}</ref>*'''436A''' – RF tetrode<ref>{{cite web |url=http://westernelectric.sectorlink.org/static/library/specifications/tubes/436A.pdf |title=436A Electron Tube |publisher=[[Western Electric]] |date=May 1963 |access-date=19 June 2021}}</ref>*'''439A''' – 1 kHz max., gas-filled, cold-cathode, 10-stage ''[[Dekatron|stepping tube]]''<ref>{{cite web |url=http://westernelectric.sectorlink.org/static/library/specifications/tubes/439A.pdf |title=439A Electron Tube |publisher=[[Western Electric]] |date=June 1957 |access-date=19 June 2021}}</ref>*'''440A''' – Directly heated triode<ref>{{cite web |url=http://www.4tubes.com/1-DATASHEETS/SCANS-Original/!5-Numbers-100--999/440A_WE_Datasheet.pdf |title=440A Electron Tube |publisher=[[Western Electric]] |date=January 1962 |access-date=12 June 2021}}</ref>*'''441''' (General Electric) – Vacuum phototube, S4 spectral response, 4-pin base<ref>{{cite web |url=https://frank.pocnet.net/sheets/141/g/GL441.pdf |title=GL-441 Phototube |publisher=[[General Electric]] |date=April 1945 |access-date=12 June 2021}}</ref>*'''442A''' – Directly heated power triode<ref>{{cite web |url=http://www.4tubes.com/1-DATASHEETS/SCANS-Original/!5-Numbers-100--999/442A_WE_Datasheet.pdf |title=442A Electron Tube |publisher=[[Western Electric]] |date=March 1962 |access-date=19 January 2016}}</ref>*'''443A''' – Gas-filled cold-cathode trigger triode, one starter electrode, <5 µCi of <sup>85</sup>Kr keep-alive, Noval base<ref>{{cite web |url=http://www.4tubes.com/1-DATASHEETS/SCANS-Original/!5-Numbers-100--999/443A_WE_Datasheet.pdf |title=443A Cold cathode |publisher=[[Western Electric]] |date=January 1962 |access-date=12 June 2021}}</ref>*'''444A''' – 6 GHz, 5 kW [[Traveling-wave tube]]<ref>{{cite web |url=http://www.4tubes.com/1-DATASHEETS/SCANS-Original/!5-Numbers-100--999/444A_WE_Datasheet.pdf |publisher=[[Western Electric]] |title=444A Electron tube |date=August 1960 |access-date=12 June 2021}}</ref>*'''446A''' (Western Electric) – 81 V, 5 to 40 mA Voltage regulator tube with a keep-alive (primer) electrode, Noval base<ref>{{cite web |url=http://www.4tubes.com/1-DATASHEETS/SCANS-Original/!5-Numbers-100--999/446A_WE_Datasheet.pdf |title=446A Electron Tube |publisher=[[Western Electric]] |date=June 1963 |access-date=12 June 2021}}</ref>*'''447A''' – Gas-filled cold-cathode voltage regulator or visual trouble indicator tube, <5 µCi of <sup>85</sup>Kr keep-alive, Noval base<ref>{{cite web |url=http://www.4tubes.com/1-DATASHEETS/SCANS-Original/!5-Numbers-100--999/447A_WE_Datasheet.pdf |title=447A Electron Tube |publisher=[[Western Electric]] |year=1962 |access-date=11 June 2021}}</ref>*'''448A''', '''448B''' ([[Aquadag]] coated), '''454A''' (shortened anode pin) – Tetrodes<ref>{{cite web |url=http://www.4tubes.com/1-DATASHEETS/SCANS-Original/!5-Numbers-100--999/448B_WE_Datasheet.pdf |title=448A, 448B, 454A Electron Tube |publisher=[[Western Electric]] |date=Sptember 1961 |access-date=12 June 2021}}</ref>*'''451A''' (Western Electric) – Gas-filled cold-cathode trigger triode, one starter anode + one starter cathode, <5 µCi of <sup>85</sup>Kr keep-alive, flying leads with lugs<ref>{{cite web |url=http://www.4tubes.com/1-DATASHEETS/SCANS-Original/!5-Numbers-100--999/451A_WE_Datasheet.pdf |title=425A Cold cathode |publisher=[[Western Electric]] |date=June 1962 |access-date=12 June 2021}}</ref>*'''453A''' – 83 V, 4 to 6 mA Voltage regulator tube, Noval base<ref>{{cite web |url=http://www.4tubes.com/1-DATASHEETS/SCANS-Original/!5-Numbers-100--999/453A_WE_Datasheet.pdf |title=446A Electron Tube |publisher=[[Western Electric]] |date=June 1963 |access-date=12 June 2021}}</ref>*'''782''' – ''Sterilamp'', an early inert-gas/Mercury-vapor [[germicidal lamp]]<ref>{{cite web |url=http://n6jv.com/museum/data/WESTINGHOUSE/archives/sterilamp.pdf |publisher=[[Westinghouse Electric (1886)|Westinghouse Electric]], Bloomfield, New Jersey, USA |title=WL-782 Sterilamp |date=August 1936 |access-date=5 June 2021}}</ref> for use e.g. inside hospital air ducts*'''785''' – Germicidal [[X-ray|''Lenard ray tube'']]<ref name="Lenardray785" />:*'''849H''' – 849 with the grid on the top cap of a lateral glass arm, extending the maximum frequency (without derating) to 30 MHz<ref>{{cite web |url=http://n6jv.com/museum/data/AMPEREX/archives/849ah.pdf |title=849A-H transmitting tube |publisher=[[Amperex Electronic|Amperex Electronic Corporation]], Brooklyn, New York, NY, USA |access-date=5 June 2021}}</ref>*'''216A''' – Directly heated amplifier/oscillator triode, 5 to 6 V/1 A filament, 4-pin base<ref>{{cite web |url=http://westernelectric.sectorlink.org/static/library/specifications/tubes/216A.pdf |title=216A Vacuum tube |publisher=[[Western Electric]] |access-date=20 June 2021}}</ref>:*'''2KD''' – [[Inductive output tube|''Klystrode'']]*'''2KDX15LA''' (15 kW, 470 to 600 MHz), '''2KDX15LF''' (15 kW, 600 to 860 MHz), '''2KDX40LA''', '''2KDX40LF''' (40 kW) – Forced-air cooled, electromagnet-focused Klystrodes<ref>{{cite web |url=http://n6jv.com/museum/data/EIMAC/archives/2kdx15la(89).pdf |title=Eimac 2KDX15LA, 2KDX15LF technical data |publisher=[[Varian Associates|Varian]]/[[Eimac]] |date=March 1989 |access-date=28 May 2021}}</ref><ref>{{cite web |url=http://n6jv.com/museum/data/EIMAC/archives/2kdx40la(90).pdf |title=Eimac 2KDX40LA, 2KDX40LF technical data |publisher=[[Varian Associates|Varian]]/[[Eimac]] |date=September 1990 |access-date=28 May 2021}}</ref>*'''2KDW60LA''', '''2KDW60LF''' – Water cooled, 60 kW, electromagnet-focused Klystrode<ref>{{cite web |url=http://n6jv.com/museum/data/EIMAC/archives/2kdw60la(89).pdf |title=Eimac 2KDW60LA, 2KDW60LF technical data |publisher=[[Varian Associates|Varian]]/[[Eimac]] |date=March 1989 |access-date=28 May 2021}}</ref>:::'''Note:''' [[Gain (electronics)|Gain (amplification factor) '''μ''']] = [[Transconductance|Mutual conductance '''g<sub>m</sub>''']] × Anode resistance '''R<sub>a</sub>'''{{anchor|PhilipsBases}}From 1924 to 1939, Philips printed a basing code on [[commons:Category:Vacuum tube boxes|tube cartons]] and price lists, but not on the tubes themselves.<ref name="Stokes70Years" />{{rp|228}} Socket designations such as {{Nowrap|"A-type"}} or {{Nowrap|"P-base"}} refer to this code, which was later (1950s) expanded to a [[#Bases|{{color|Green|<BasingCode><PinCount><Variant> format}}]]:*'''A''' – 4-pin Continental European base, originally Franco-British*'''B''' – 4-pin [[Telefunken]] base (1920s);<ref name="PhilipsBuizen1927" />{{rp|16f}} later 6-pin Continental European base (1930s)<ref name="PhilipsMiniwatt1938" />{{rp|15}}*'''C''' – American UV base (1920s); later 7-pin Continental European base (1930s)*'''D''' – 5-pin French base, used on ''bi-grille'' tetrodes*'''E''' – 4-pin French [[Radiotechnique|''Radiola'']] base (1920s); later 7-pin Medium American base (1930s)*'''F''' – 4-stub American [[#With a 3.3 Volts DC filament|{{color|Green|UV-199}}]]-type base*'''G''' – 4-pin American base (UX)*'''H''' – 3-pin European base*'''J''' – 6-pin American base*'''K''' – Octal base*'''L''' – 5-pin Special base<ref name="PhilipsMiniwattComparisonList1939">{{cite web |url=https://frank.pocnet.net/other/Philips/PMCPBFV1939.pdf |title=Philips Miniwatt Comparative Pocketbook For Valves 1939 |edition=6 |date=January 1939 |access-date=7 April 2021}}</ref>{{rp|91}}*'''M''' – 4-pin American [[WD-11]]-type base (1920s); later 7-pin British base (1930s)*'''N''' – American UY base (1920s); later 5-pin American base (1930s)*'''O''' – 5-pin Continental European base*'''P''' – Side-contact 8 base*'''Q''' – 7-pin Special base<ref name="PhilipsMiniwattComparisonList1939" />{{rp|91}}*'''R''' – 9-pin British base<ref name="PhilipsMiniwattComparisonList1939" />{{rp|91}}*'''S''' – ''Midget 4-pin {{Abbr|Hivac|The High Vacuum Valve company of London, UK}}'' subminiature [[hearing aid]] base<ref name="PhilipsMiniwattComparisonList1939" />{{rp|91}}*'''T''' – 9-pin all-glass Continental European base*'''U''' – 6-pin Special base<ref name="PhilipsMiniwattComparisonList1939" />{{rp|90}}*'''V''' – Side-contact 5 base*'''W''' – 4-pin Special base<ref name="PhilipsMiniwattComparisonList1939" />{{rp|91}}*'''X''' – ''[[Acorn tube]]''*'''Y''' – 8-pin Continental European base, originally German ''steel tubes'' {{aka}} "German Metal Octal"On cartons and tube lists, this basing code was followed by a number giving the maximum envelope diameter in mm:*'''AD1N''' – AD1 with a half-indirect 4 V/2 A heater*'''215A''' (Western Electric) = '''4215A''' (STC/Brimar) – Directly heated miniature AF/IF/detector triode, 1 V/250 mA filament, ''Peanut'' 4-stub Bayonet base*'''703A''' (WE, Tung-Sol) – 20 W Directly heated ''Doorknob'' UHF power triode up to 1.5 GHz, 1.15 V/4.5 A filament;<ref>{{cite web |url=http://n6jv.com/museum/data/WE/archives/703a.pdf |publisher=[[Western Electric]] |title=703A Technical information |access-date=28 May 2021}} • {{cite web |url=https://frank.pocnet.net/sheets/127/7/703A.pdf |publisher=[[Tung-Sol]] |title=703A data sheet |date=15 December 1943 |access-date=3 March 2021}}<!-- http://www.4tubes.com/1-DATASHEETS/SCANS-Original/!5-Numbers-100--999/703A-TS_Datasheet.pdf --></ref> 368AS with tightened [[Cut-off (electronics)#Tubes|cut-off]] specs*'''705A''' (WE, GE, Raytheon, Tung-Sol) = '''8021''' (378A) – 30 kV, 100 mA Half-wave [[High voltage|EHT]] rectifier with electrodes supported directly from the hard glass envelope, no internal insulators, 5 V/5 A filament, B4A 4-pin base with anode top cap<ref>{{cite web |url=http://n6jv.com/museum/data/WE/archives/705a(44).pdf |publisher=[[Western Electric]] |title=705A Technical information |date=27 January 1944 |access-date=27 May 2021}} • {{cite web |url=https://frank.pocnet.net/sheets/127/7/705A.pdf |publisher=[[Tung-Sol]] |title=705A data sheet |date=15 December 1943 |access-date=3 March 2021}} • on [https://lampes-et-tubes.info/re/re085.php?l=e Lampes-et-tubes]</ref>*'''708A''' (WE, Tung-Sol) – ''Flying saucer tube'', a directly heated SHF power triode, [[Gain (electronics)|μ]] = 10, grid connected to the flanged steel envelope, 1.7 V/1.85 A filament, used as [[Valve RF amplifier#Grounded grid amplifier|grounded-grid]] RF amplifier or mixer in 1...3 GHz radar receivers<ref>{{cite web |url=http://n6jv.com/museum/data/WE/archives/708a.pdf |publisher=[[Western Electric]] |title=708A Technical information |access-date=28 May 2021}} • on [http://www.r-type.org/exhib/acl0048.htm r-type.org] • on [https://www.radiomuseum.org/tubes/tube_708a.html radiomuseum.org] • on [http://www.ase-museoedelpro.org/Museo_Edelpro/Catalogo/tubes/records_nw/708A/708A.pdf edelpro]</ref>*'''710A''' (WE) = '''8011''' – ''[[Micropup]]'' UHF power triode<ref>{{cite web |url=http://n6jv.com/museum/data/WE/archives/710a.pdf |publisher=[[Western Electric]] |title=710A Technical information |access-date=28 May 2021}}</ref>*'''715B/C''' (WE, Raytheon) (5D21) – 60 W Hard pulse modulator tetrode, U<sub>Amax</sub> = 15 kV, half-indirect 26 V/2.1 A heater, B4A 4-pin base with anode top cap<ref name="bstj26-4-818" /><ref>{{cite web |url=http://n6jv.com/museum/data/WE/archives/715b.pdf |publisher=[[Western Electric]] |title=715B Technical information |date=13 November 1943 |access-date=28 May 2021}} • {{cite web |url=https://frank.pocnet.net/sheets/049/7/715C.pdf |publisher=[[RCA]] |title=715C data sheet |access-date=3 March 2021}}</ref>*'''716A''' (WE) – Thyratron; superseded by 722A*'''[[WD-11]]''', '''WD-12''' (UV4 base), '''WX-12''' (UX4 base) – Directly heated amplifier/detector triodes, 1.1 V/250 mA filament*'''V99''' = '''UV-199''' – Directly heated low-mu amplifier/detector triode, 3.3 V/60 mA filament; '''X99''' with a 4-stub Bayonet base and a different pinout*'''4J42''' – 40 kW Magnetron, 660 to 730 MHz<ref name="bstj25-2-167">{{cite web |url=https://archive.org/details/bstj25-2-167 |title=The Magnetron as a Generator of Centimeter Waves |series=The [[Bell System]] technical journal |date=April 1946 |author1=Fisk, J.B. |author2=Hagstrum, H.D. |author3=Hartman, P.L. |access-date=18 April 2021}}</ref>{{rp|287ff}}*'''7NP4''' ({{cvt|60|ft|m|0}} projection distance), '''7WP4''' ({{cvt|80|ft|m|0}} projection distance) – 7" Theatric [[CRT projector|projection CRTs]], 75 kV anode voltage, considerable [[X-ray tube#Hazards of X-ray production from vacuum tubes|X-radiation]], magnetic deflection, P4 white, medium-persistence, cast a {{cvt|20|×|15|ft|m|1}} image*'''12L8GT''' – Common cathode dual power pentode, Octal base, for use as a parallel-connected or push-pull output stage*'''12SC7''' – High-mu dual triode, 12.6 V/150 mA heater, for use as AF amplifier or phase inverter*'''EL862''' – Power pentode*'''EL863''' – Power pentode*'''XQ1010''' – 1" ''[[Video camera tube#Vidicon|Vidicon]]'', resolution ≥600 TV lines*'''XQ1020''' ([[Black and white|B/W]]), '''XQ1020L''' (luminance channel), '''XQ1020B''' (blue channel), '''XQ1020G''' (green channel), '''XQ1020R''' (red channel) – {{cvt|6⁄5|in|mm|0|order=flip}} Color TV broadcast-grade ''[[Video camera tube#Plumbicon (1963)|Plumbicon]]'', resolution ≥600 TV lines*'''XQ1021/B/G/R''' – Industrial-grade XQ1020*'''XQ1022''' (30mm), '''XQ1072''' (1") – ''Plumbicon'' for use with an [[X-ray image intensifier]] in medical equipment*'''XQ1023/L/R''' – 30mm ''Plumbicon'', resolution ≥700 TV lines*'''XQ1024/R''' – Industrial-grade XQ1023*'''XQ1025/L/R''' – XQ1023 with an IR reflection filter*'''XQ1029R''' – Camera tube , red channel*'''XQ1031''' (industrial-grade), '''XQ1032''' (commercial-grade) – 1" ''Vidicon'', magnetic focusing and deflection, [[Antimony trisulfide|Sb<sub>2</sub>S<sub>3</sub>]] target*'''XQ1040''', '''XQ1050''' (for [[telecine|film scanning]]), '''XQ1042''', '''XQ1052''' (broadcast-grade), '''XQ1043''', '''XQ1053''' (industrial-grade), '''XQ1044''', '''XQ1054''' (commercial-grade) – 1" ''Vidicon''*'''XQ1070/L/B/G/R''' – 1" Color TV broadcast-grade ''Plumbicon'', resolution ≥600 TV lines*'''XQ1071/B/G/R''' – Industrial-grade XQ1070*'''XQ1073R''' – 1" ''Plumbicon'', extended red response, resolution ≥750 TV lines*'''XQ1073X''' – 1" ''Plumbicon'', matched to X-ray image intensifiers with P20 [[phosphor]]*'''XQ1074''' – Industrial-grade XQ1073*'''XQ1075/R''' – XQ1073 with extended red response and an IR reflection filter*'''XQ1076/R''' – Industrial-grade XQ1075*'''XQ1083''', '''XQ1084''' – XQ1080 with extended red response*'''XQ1085''', '''XQ1086''' – XQ1083, XQ1084 with IR reflection filter*'''XQ1200''' – ''Electron Bombarded Silicon Tube'', a ''Vidicon'' with a silicon target*'''XQ1270''' (≥400 TV lines), '''XQ1271''' (≥550 TV lines), '''XQ1272''' (≥500 TV lines) – ⅔" Commercial-grade ''Vidicon'', Sb<sub>2</sub>S<sub>3</sub> target, overall length {{cvt|4+1⁄4|in|cm|1|order=flip}}*'''XQ1274''' – ⅔" ''[[Video camera tube#Newvicon (1973)|Newvicon]]'', magnetic focussing and deflection, [[Zinc selenide|ZnSe]] + [[Cadmium zinc telluride|CdZnTe]] target, for use in low-light security cameras, resolution ≥650 TV lines*'''XQ1275''' – ⅔" ''Newvicon'' camera tube*'''XQ1285''' – 1" ''Vidicon'', magnetic focusing and deflection, precision electron gun, Sb<sub>2</sub>S<sub>3</sub> target, fiber optic interface to X-ray image intensifiers with P11 or P20 phosphors and fiber optic output, for use in medical equipment*'''XQ1290''' – 1" ''Resistron'' camera tube, Sb<sub>2</sub>S<sub>3</sub> target, for use with X-ray image intensifiers in medical equipment*'''XQ1340''' – ''Electron Bombarded Silicon Tube'', a low-light ''Vidicon'' with a silicon target<ref name="AEG_EBSi">{{cite web |url=https://frank.pocnet.net/other/AEG-Telefunken/AEG-Telefunken_ImageIntensifierTubes_more.pdf |title=Image Intensifier Tubes, Infrared Image Converter, EBSi-Camera Tube |publisher=[[AEG (German company)]]-[[Telefunken]] |access-date=2 April 2021}}</ref>*'''XQ1400''' (A-grade), '''XQ1401''' (B-grade), '''XQ1402''' (C-grade) – 1" Binned Si-Vidicons*'''XQ1410/L/B/G/R''', '''XQ1413R''' (extended red response), '''XQ1415L/R''' (extended red response and IR filter) – XQ1020 with fiber optics and ≥650 TV lines resolution*'''XQ1412''' – 30mm ''Plumbicon'', low lag, [[Gamma correction|unity gamma]] matched to X-ray image intensifiers with P20 phosphor*'''XQ1427/B/G/R''' (color TV broadcast-grade), '''XQ1428''' (industrial-grade) – ⅔" ''Plumbicon'', low lag*'''XQ1430B/G/R''' – Color TV broadcast-grade ''Plumbicon''*'''XQ1435B/G/R''' – Color TV broadcast-grade ''Plumbicon''*'''XQ1440''', '''XQ1442''', '''XQ1443''', '''XQ1445''' – 1" ''Newvicon'', separate mesh, ZnSe + CdZnTe target*'''XQ1500/L/B/G/R''', '''XQ1503R''' (extended red response), '''XQ1505R''' (extended red response and IR filter) – 1" Color TV broadcast-grade ''Plumbicon'', anti-comet tail electron gun, internal light bias by a light pipe*'''XQ1560''' – 1" ''Saticon'' camera tube*'''XQ1565''' – 1" ''Saticon'' camera tube*'''XQ1570/L/B/G/R''' (color TV broadcast-grade), '''XQ1571''' (industrial-grade), '''XQ1573R''' (extended red response), '''XQ1574''' (industrial-grade), '''XQ1575R''' (extended red response and IR filter), '''XQ1576''' (industrial-grade) – 1" ''Plumbicon''*'''XQ1585''' – 1" ''Saticon'' camera tube*'''XQ1600''' – ½" Commercial-grade ''Vidicon'', separate mesh, electrostatic focusing and magnetic deflection*'''XQ1601''', '''XQ1602''' (radiation resistant) – ½" ''Newvicon'', separate mesh, electrostatic focusing and magnetic deflection*'''XQ2070/L/B/G/R''' (color TV broadcast-grade), '''XQ2071''' (industrial-grade), '''XQ2073R''' (extended red response), '''XQ2074''' (industrial-grade), '''XQ2075R''' (extended red response and IR filter), '''XQ2076''' (industrial-grade) – 1" ''Plumbicon''*'''XQ2172/X''' – 1" ''Plumbicon'', wide dynamic range matched to X-ray image intensifiers with P20 phosphor, for use in digital radiography applications*'''XQ2182''' – 1" ''Plumbicon'', wide dynamic range matched to digital radiography applications*'''XQ2427/B/G/R''' (color TV broadcast-grade), '''XQ2428''' (industrial-grade) – ⅔" ''Plumbicon''*'''XQ3070/L/B/G/R''' (color TV broadcast-grade), '''XQ3071''' (industrial-grade), '''XQ3073R''' (extended red response), '''XQ3074''' (industrial-grade), '''XQ3075R''' (extended red response and IR filter), '''XQ3076''' (industrial-grade) – 1" ''Plumbicon''*'''XQ3427/B/G/R''' – ⅔" Color TV broadcast-grade ''Plumbicon''*'''XQ3430B/G/R''' – Color TV broadcast-grade ''Plumbicon''*'''XQ3435B/G/R''' – Color TV broadcast-grade ''Plumbicon''*'''XQ3440/L/B/G/R''', '''XQ3443R''' (extended red response), '''XQ3445R''' (extended red response and IR filter) – 30mm Color TV broadcast-grade ''Plumbicon''*'''XQ3457/B/G/R''' – ⅔" Color TV broadcast-grade ''Plumbicon''*'''XQ3467/B/G/R''' – ⅔" Color TV broadcast-grade ''Plumbicon''*'''XQ4187/B/G/R''' – ⅔" Color TV broadcast-grade ''Plumbicon''*'''XQ4502/A''' – 30mm/45mm ''Plumbicon'', highest resolution, low lag, for use with X-ray image intensifiers in medical equipment*'''XX1050''' – 1-stage image intensifier with fiber optics, S25 [[photocathode]], P20 [[phosphor]]*'''XX1060''' – 3-stage image intensifier with fiber optics, S25, P20, for use in [[night vision]] equipment<ref name="Mullard_NightVision">{{cite web |url=https://frank.pocnet.net/other/Mullard/Mullard_NightVision_XX1500_1980.pdf |title=Mullard Night Vision |publisher=[[Mullard]] |access-date=2 April 2021}}</ref>*'''XX1066''' – 1. Gen. 3-stage image intensifier, S25, P20<ref name="AEG_EBSi" />*'''XX1100''' – S20→P11 Gated image intensifier used as a high-speed (1 ns) [[Shutter (photography)|shutter]] in photography*'''XX1190''' – 1. Gen. inverter, 1-stage image intensifier, S25, P20<ref name="AEG_EBSi" />*'''XX1200''' – 1. Gen. inverter, 1-stage image intensifier, S25, P20<ref name="AEG_EBSi" />*'''XX1210''', '''XX1211''' – 1. Gen. 3-stage image intensifier, S25, P20<ref name="AEG_EBSi" />*'''XX1230''' – S20→P11 Gated image intensifier used as a high-speed (1 ns) shutter in photography*'''XX1400''' – 2. Gen. inverter, 1-stage image intensifier, S25, P20<ref name="AEG_EBSi" />*'''XX1430''' – 1. Gen. inverter, 1-stage image intensifier, S25, P20<ref name="AEG_EBSi" />*'''1603''' – Indirectly heated low-microphonics, noise, and hum, AF pentode, 6.3 V/300 mA heater, U6A base; similar to types 57, 6C6, 6D6 and 6U7*'''1608''' – Directly heated power triode giving 20 watts at up to 45 MHz, 2.5 V/2.5 A filament, UX4 base; similar to type 801*'''1609''' – Directly heated low-microphonics AF pentode, 1.1 V/250 mA filament, UY5 base*'''1611''' – Power pentode for use in maritime, automatic {{Overline|[[SOS]]}} [[Ship's emergency transmitter|transmitters]]; 6F6 with tightened specs*'''1613''' – 17.6 W Indirectly heated RF power pentode, 6.3 V/700 mA heater, Octal base*'''1614''' – 21 W Indirectly heated RF beam power tetrode, 6.3 V/900 mA heater, Octal base*'''1616''' – 6.5 kV, 130 mA Half-wave rectifier, UX4 base with anode on top cap*'''1619''' – RF Beam power tetrode, 2.5 V/2 A filament, Octal base, common in World War II battle tank transmitters; similar to type 6L6 but directly heated*'''1620''' – Indirectly heated low-microphonics AF pentode, 6.3 V/300 mA heater, Octal base; very similar to type 6J7*'''1621''' – 8.3 W Indirectly heated AF power pentode, 6.3 V/700 mA heater, Octal base; long-life version of the 6F6*'''1622''' – 13.8 W Indirectly heated AF beam power tetrode, 6.3 V/900 mA heater, Octal base; long-life version of the 6L6*'''1623''' – 25 W Directly heated power triode, 6.3 V/2.5 A filament, UX4 base; similar to type 809*'''1624''' (2.5 V/2 A heater), '''1625''' (12.6 V/450 mA heater) – Indirectly heated RF beam power tetrode, g<sub>m</sub> = 4 m℧, [[Dielectric loss|low loss]] [[mica]]-filled [[Phenol formaldehyde resin|phenolic resin]] (''Micanol'')<ref name="Micanol" /> Octal base with anode on top cap; very similar to type [[#807|{{color|Green|807}}]], but with different heaters*'''1629''' – [[Magic eye tube|Tuning indicator]] tube with DC amplifier triode unit; 6E5 with an Octal base and a 12.6 V/150 mA heater*'''1631''' – 16 W Indirectly heated AF beam power tetrode, 6.3 V/450 mA heater; 6L6 with tightened specs*'''1632''' – 5.5 W Indirectly heated AF beam power tetrode, 12.6 V/600 mA heater; 25L6 with tightened specs*'''1633''' – Separate cathode dual triode, Octal base, used aboard World War II aircraft; 6SN7/ECC32 with a 25 V/150 mA heater*'''1634''' – Dual triode; 12SC7 with tightened specs*'''1635''' – Indirectly heated, 10.4 W common cathode dual AF power triode, 6.3 V/600 mA heater, Octal base*'''1640''' = '''6405''' – Gas-filled, low-microphonics [[phototube]], [[Photocathode|caesium-coated cathode]] with spectral S1 response (red/infrared, maximum sensitivity at 800 nm), 4-pin base, for industrial applications such as [[Bottling line|electronic bottle/ampoule inspection equipment]]*'''1644''' – Dual power pentode; 12L8-GT with tightened specs*'''1654''' – 7 kV, 1 mA Half-wave rectifier, Miniature 7-pin base with anode on top cap*'''1699''' – Indirectly heated hexode [[monoscope]], 6-pin base with dual top caps for #4 grid and anode; 2F21 with a customer-supplied [[Test card|test pattern]]*'''711A''' (WE) – "Oscillator (British)" <ref name="MIL-HDBK-213A" />{{rp|179}}*'''712A''' (WE) – Reflex Klystron, superseded by 707A<ref name="MIL-HDBK-213A" />{{rp|179}}*'''812A''' – Directly heated RF power triode, 6.3 V/4 A filament, giving 100 W up to 30 MHz and 55 W at 100 MHz*'''816''' – [[Mercury-arc valve|Mercury-vapor rectifier]], 7.5 kV anode voltage, 125 mA anode current, 2.5 V/2 A filament*'''826''' – Directly heated RF power triode, center-tapped 7.5 V/4 A filament, giving 22 W at 250 MHz*'''827R''' – Forced-air cooled, directly heated beam power tetrode giving 400 W up to 110 MHz, 7.5 V/25 A filament*'''828''' – 70 W Directly heated VHF beam power tetrode, 10 V/3.25 A filament, low loss mica-filled phenolic resin ("Micanol") 5-pin base, anode on top cap*'''832''' – Indirectly heated dual VHF beam power tetrode, center-tapped 12.6 V/800 mA heater*'''835''' – Directly heated power triode; 211 with a reduced grid-to-anode capacitance*'''846''' – 2.5 kW Water-cooled RF power triode, 11 V/51 A filament*'''858''' – 15 kW Water-cooled RF power triode, 22 V/52 A filament*'''859''' – 20 kW Water-cooled RF power triode, 22 V/71 A filament*'''868''' – Gas-filled [[phototube]], [[Photocathode|caesium-coated cathode]] with spectral S1 response (red/infrared, maximum sensitivity at 800 nm), 4-pin base*'''869''' – Mercury-vapor rectifier with a peak inverse voltage of 20 kV and peak anode current of 10 A, average anode current 2.5 A, forward drop 17 V, 5 V/19 A heater*'''870B''' – Forced-air cooled Mercury-vapor rectifier with a peak inverse voltage of 16 kV and peak anode current of 450 A, average anode current 75 A, 5 V/65 A heater<ref name="RCAtx1942" />{{rp|43}}*'''878''' – [[Cathode-ray tube|CRT]] [[High voltage|EHT]] rectifier with a peak inverse voltage of 20 kV and average anode current of 5 mA, 2.5 V/5 A heater, 4-pin base with anode top cap*'''880''' – 20 kW Water+forced-air cooled RF power triode, 12.6 V/320 A filament*'''881''' – Mercury-vapor rectifier with a peak inverse voltage of 15 kV and peak anode current of 15 A, average anode current 5 A, forward drop 20 V, 5 V/9.5 A heater*'''887''' ([[Gain (electronics)|μ]] = 10), '''888''' (μ = 30) – 800 W, 225 MHz Water-cooled RF power triode, 11 V/24 A filament<ref name="RCAtx1942" />{{rp|42}}*'''889''' (Water-cooled), '''889R''' (Air radiator) – 5 kW RF Power triode, 11 V/125 A filament*'''891''' (5 kW, Water-cooled), '''891R''' (Air radiator), '''892''' (7.5 kW, Water-cooled), '''892R''' (Air radiator) – RF Power triode, center-tapped 22 V/60 A filament for e.g. two-phase operation*'''899A''' – 20 kW Water-cooled RF power triode, 14.5 V/180 A filament*'''D''' – ''Bialkali'' [[potassium]]-antimony-caesium cathode, spectral response from UV to red:'''DU''' – "D" with a [[Fused quartz|Silica]] window for UV detection*'''SBU''' – [[Solar-blind technology|''Solar-blind'']] caesium-[[telluride (chemistry)|telluride]] cathode, spectral response from [[Ultraviolet#Subtypes|UV-B to Vacuum UV]], peak sensitivity 235 nm (UV-C), Silica window:'''TU''' – "T" with a Silica window for UV detection*'''56DVP''', '''56DUVP''' – 12-stage photomultiplier, Bidecal 20-pin base*'''56SBUVP''' – 14-stage photomultiplier, Bidecal 20-pin base*'''56TVP''', '''56TUVP''' – 12-stage photomultiplier, Bidecal 20-pin base*'''14BCP22''' – 14" (36 cm) Color CRT, 50° × 70° magnetic deflection, P22 [[RGB color model|RGB]], medium-persistence*'''6J10/6Z10''' – Compactron [[Detector (radio)#Quadrature detector|Quadrature demodulator]] pentode + power pentode, used as FM audio demodulator and power stage; cf. 6BN6, Nonode*'''4BN6''' – ''Gated-beam discriminator'' pentode, used in [[Detector (radio)#Quadrature detector|FM quadrature demodulator]]s; 3BN6, 6BN6, 12BN6 with a different heater*'''4DT6''' – Pentode used in FM audio quadrature demodulators; 3DT6, 6DT6 with a different heater*'''13J10/13Z10''' – ''Compactron'' Pentode + power pentode, used as FM audio [[Detector (radio)#Quadrature detector|Quadrature demodulator]] and power stage; 6J10/6Z10, 10Z10 with a different heater*'''EA41''' – 150 V, 9 mA Diode, 4-pin Rimlock base*'''EA71''' – Diode, all-glass elliptical cross-section envelope with 5 inline wire-ends*'''ECC813''' (6463) – Separate cathodes, dual triode for computer circuits, heaters internally series-connected, with the midpoint on a separate pin, Noval base*'''ECC863''' – Separate cathodes, dual triode with an internal screen between the sections*'''ECF803''' – ECF801/6GJ7 with separate cathodes*'''EL61''' – Power pentode, B9G 9-pin Loctal base*'''ORP23''' – CdS photoresistor, top window, 2-pin base, max. sensitivity at λ = 675 nm*'''ORP80/RPY13''' – [[Resistive opto-isolator|''Vactrol''-type opto-isolator]], a small 24 V/60 mA incandescent lamp surrounded by four 200 V<sub>max</sub> CdS photoresistors in a black-tinted glass envelope, Noval base<ref>RPY13 etc. [https://nfor.nl/images/uploaded/201801201838195a638c9bc0c9a.jpg short form data]</ref>*'''300A''' – 40 W Directly heated AF power triode, 5 V/1.2 A filament, 4-pin base*'''[[300B]]''' – 36 W version of the 300A, 4-pin base with the lateral Bayonet pin rotated by 45° <ref>{{cite web |url=http://n6jv.com/museum/data/WE/archives/300a(39).pdf |publisher=[[Western Electric]] |title=300A and 300B Vacuum Tubes |year=1939 |access-date=5 June 2021}}</ref> so it could replace the 205A [[File:Commons-logo.svg|16x16px|link=:Commons:Category:300B|class=noviewer|alt=]]*'''CK1362''' – Controlled-persistence 10" [[Cathode-ray tube|CRT]] with a blue-fluorescence, infrared-stimulable [[phosphor]] capable of storing electron beam energy and later release it in the form of yellow-green phosphorescence when irradiated with IR in the 1 µm range*'''OME1199E2''' (27cm, 10"),<ref name=T_CSF_Image>{{cite web |url=https://frank.pocnet.net/other/ThomsonCSF/ThomsonCSF_TubesEtDispositifsAImage_2_1977.pdf |title=''Image and Display Tubes 1977'' part 2 (193MB) |publisher=[[Thomson-CSF]] |access-date=12 March 2021}}</ref>{{rp|216ff}} '''OME1269E21''' (40cm, 16")<ref name=T_CSF_Image />{{rp|220ff}} – ''[[Penetron]]''-type red-to-green limited-[[gamut]] CRT*'''SC2795''', '''SC3863''' (3", 7.6cm), '''SC3144''', '''SC3154''' (9", 23cm) – [[Cathode-ray tube|CRT]]s with an unphosphored front glass but with fine wires embedded in it for use as [[Printer (computing)#Liquid ink electrostatic printers|electrostatic print head]]s; the wires would pass the electron beam current through the glass onto a sheet of paper where the desired content was therefore deposited as an electrical charge pattern. The paper was then passed near a pool of liquid ink with the opposite charge. The charged areas of the paper attract the ink and thus form the image; cf. CK1366, CK1367, CK1368, CK1369*'''SC3304''' (3"), '''SC3507''', '''SC3800''', '''SC3876''' (10", 25cm), '''SC3850''' (5", 13cm) – CRTs with a fiberoptic faceplate for use as [[Black and white|B/W]] photoprinter heads, P11 blue, short-persistence [[phosphor]]*'''SC3093''' – 3" [[Character generator]] [[monoscope]] for [[text mode]] video rendering in [[Video display terminal#Early VDUs|early computer monitors]] and electrostatic printers, with a 2×2" (5×5cm) square target having letters, digits and symbols patterned on it in a customer-supplied 8×8 array. An electron beam selects and scans a character, both by appropriate electrostatic deflection, and generates an [[Luma (video)|analog video signal]]; cf. 4560, CK1414, TH9503*'''SC3185''' (21", 53cm, P4 white), '''SC3369''' (16", 41cm, P7 blue/yellow, short/long-persistence), '''SC3821''' (7", 18cm, P14 purple/orange, medium/long), '''SC3875''' (19", 48cm, P14) – ''Character Writing Tube'', CRTs with both magnetic deflection for character positioning, and electrostatic deflection for character writing from SC3093 output*'''SC4876''' (21"), '''SC4899''' (8", 20cm) – ''[[Penetron]]''-type red-to-white limited-[[gamut]] CRTs*'''TH8102E20''' (24cm, 9"),<ref name=T_CSF_Image /> '''TH8104E21''' (54cm, 21")<ref name=T_CSF_Image />{{rp|165ff}} – ''[[Penetron]]''-type red-to-green limited-[[gamut]] CRT*'''MT7A''', '''MT7B''' – 12 kV, 600 W Radiation-cooled power triodes with a [[Molybdenum]] anode, 15 V/10 A filament,<ref name="MarconiSaga">{{cite book |last1=Jessop |first1=George R. |last2=Vyse |first2=Barry |year=2000 |title=The Saga of Marconi Osram Valve |publisher=Vyse Books Ltd., Pinner, Middlesex, UK |isbn=0-9539127-0-1}} In: {{cite magazine |url=https://www.bvws.org.uk/publications/bulletins/pdf/BVWS_Bulletin_24_4.pdf |title=Extracts, part 1 |publisher=The British Vintage Wireless Society |magazine=BVWS Bulletin |volume=24 |issue=4 |pages=12ff |access-date=1 May 2017}} • {{cite magazine |url=https://www.bvws.org.uk/publications/bulletins/pdf/BVWS_Bulletin_25_1.pdf |title=Extracts, part 2 |magazine=BVWS Bulletin |volume=25 |issue=1 |pages=9ff |access-date=6 February 2021}} • {{cite magazine |url=https://www.bvws.org.uk/publications/bulletins/pdf/BVWS_Bulletin_25_3.pdf |title=Extracts, part 3 |magazine=BVWS Bulletin |volume=25 |issue=3 |pages=18ff |access-date=6 February 2021}}</ref>*'''ИН-9''' ⟼ '''IN-9''' – Neon-filled bar graph indicator, a glass tube with a short anode and a long wire cathode that glows partially; the glow length is proportional to the tube current; similar to [[#OET|{{color|Green|GEC TuneOn}}]]*'''ИН-13''' ⟼ '''IN-13''' – ИН-9 with a starter cathode and a segmented indicating cathode<ref>{{cite web |url=https://lampes-et-tubes.info/cd/IN-13a.pdf |title=ИН-13 data sheet |language=ru |access-date=14 February 2021}} on [https://lampes-et-tubes.info/cd/cd003.php?l=e lampes-et-tubes.info]</ref>Ballast tubes/resistors and barretters were designated the following subset:*<Voltage>'''A1''' to <Voltage>'''Z1''' – No filament tap, no jumper*<Voltage>'''A2''' – Filament tap for two pilot lamps*<Voltage>'''B2''' – Filament tap for one pilot lamp*'''1D2''', '''1E2''' – With a jumper to unpower the device when the ballast is pulled from its socket;[[Cathode-ray tube|Monochrome CRTs:]]*The first number gives the screen diagonal or diameter in inches (instead of the heater voltage)*One or two sequentially assigned letters *The last number is preceded by a '''P''' and specifies the [[phosphor]] used'''Examples:'''*'''1EP1''' (P1 green, medium-persistence), '''1EP2''' (P2 yellow-green, long-persistence), '''1EP11''' (P11 blue, short-persistence) – 1" (2.5 cm) CRT for use in [[oscilloscope]]s, [[electrostatic deflection]]*'''2AP1''', '''2BP1''' – 2" (5.1 cm) CRT for use in oscilloscopes, electrostatic deflection*'''3ABP1''', '''3ABP2''', '''3ABP7''' (blue/yellow, short/long), '''3ABP11''' – Dual-beam 3" (7.6 cm) CRT for use in oscilloscopes, electrostatic deflections*'''4DP1''', '''4DP2''', '''4DP7''', '''4DP11''' – Dual-beam 4" CRT for use in oscilloscopes, electrostatic deflections*'''6DP1''', '''6DP2''', '''6DP7''', '''6DP11''', '''6DP14''' (purple/orange, medium/long), '''6DP19''' (orange, long), '''6DP25''' (orange, very long) – Triple-beam 6" (15 cm) CRT for use in oscilloscopes, electrostatic deflections*'''8CP1''', '''8CP2''', '''8CP4''', '''8CP5''' (blue, very short), '''8CP7''', '''8CP11''' – 8" (20 cm) CRT for use in oscilloscopes, electrostatic deflection*'''30BP4''' – 30" (76 cm) CRT used in 1950s premium television receivers, 90° magnetic deflection, P4 white, medium-persistence*'''12AD6''' – Low (10.0-15.9 V) anode voltage sharp-cutoff heptode [[pentagrid converter]]*'''KTW21''' – Remote-cutoff RF/IF beam tetrode, 4-pin base with control grid on top cap, 2 V/100 mA filament; upgrade to the older W21*'''KTW61''', '''KTW62''' – Remote-cutoff RF/IF beam tetrode, Octal base with control grid on top cap, 6.3 V/300 mA heater; upgrade to the older W61:*'''KTW61M''' – KTW61 with a metal particles spray-shielded envelope*'''KTW63''' – Remote-cutoff RF/IF beam tetrode, Octal base with control grid on top cap, 6.3 V/300 mA heater; upgrade to the older W63*'''KTW73''', '''KTW73M''' (Spray-shielded) – Remote-cutoff RF/IF beam tetrode, Octal base with control grid on top cap, 6.3 V/160 mA heater*'''KTZ61''' – Sharp-cutoff RF/IF beam tetrode, Octal base with control grid on top cap, 6.3 V/300 mA heater*'''KTZ63''' – Sharp-cutoff RF/IF beam tetrode, Octal base with control grid on top cap, 6.3 V/300 mA heater; upgrade to the older Z63, beam version of 6J7/EF37 with suppressor plates connected to cathode, not to a separate pin*'''KTZ73''', '''KTZ73M''' (Spray-shielded) – Sharp-cutoff RF/IF beam tetrode, Octal base with control grid on top cap, 6.3 V/160 mA heater*'''42A1''' (141 Ω), '''49A1''' (162 Ω), '''55A1''' (183 Ω), '''80A1''' (266 Ω), '''86A1''' (287 Ω), '''92A1''' (308 Ω) – Straight ballast resistors, Octal base, for use in areas with a [[Electrical grid#Voltage|stable power grid]]*'''42A2''', '''49A2''', '''55A2''', '''80A2''', '''86A2''', '''92A2''' – Straight ballast resistors with tap for 2 pilot lamps*'''42B2''', '''49B2''', '''55B2''', '''80B2''', '''86B2''', '''92B2''' – Straight ballast resistors with tap for 1 pilot lamp*'''59''' – 3 W Power pentode, 2.5 V/2 A heater, U7A based. Three modes of operation available::#Standard pentode circuit for use as single-tube [[Power amplifier classes#Class A|Class-A]] audio driver:#Grids 2 and 3 tied to anode (triode strap) for use as single-tube Class-A audio driver:#Grids 1 and 2 connected together, #3 grid tied to anode for use as push-pull Class-B output*'''89''' – 3.4 W Power pentode, 6.3 V/400 mA heater, U6A based. Three modes of operation available::#Standard pentode circuit for use as single-tube [[Power amplifier classes#Class A|Class-A]] audio driver:#Grids 2 and 3 tied to anode (triode strap) for use as single-tube Class-A audio driver:#Grids 1 and 2 connected together, #3 grid tied to anode for use as push-pull Class-B output[[Burroughs Corporation|Burroughs]] Neon-filled planar [[Dekatron|glow-transfer]] [[Plasma display#History|plasma bar graph displays]]:*'''BG08220-K''' – 120-Segment circular with five cathode strings plus a Reset cathode, 1-in-5 major/minor [[Graduation (instrument)|graduation]], for use e.g. in [[Direction finding|direction-finding]] equipment*'''10ЛО105А''' ⟼ '''10LO105A''' – [[Traveling-wave tube|TWT]]/[[Cathode-ray tube|CRT]] combination;<ref>{{cite web |url=https://lampes-et-tubes.info/cr/10LO105A.pdf |title=10ЛО105А data sheet |language=ru |access-date=14 February 2021}} on [https://lampes-et-tubes.info/cr/cr168.php?l=e lampes-et-tubes.info]</ref> similar to 6762 ''Wamoscope''*'''22ЛО1А''' ⟼ '''22LO1A''' – 5-Beam CRT<ref>{{cite web |url=https://lampes-et-tubes.info/cr/cr062f.jpg |title=22ЛО1А data sheet |language=ru |access-date=14 February 2021}} on [https://lampes-et-tubes.info/cr/cr062.php?l=e lampes-et-tubes.info]</ref>*'''ИГТ1-203Р''', '''ИГТ2-203Р''', '''ИГТ3-203Р''' ⟼ '''IGT1-203R''' (1-in-5 Major/minor [[Graduation (instrument)|graduation]]), '''IGT2-203R''' (flat graduation), '''IGT3-203R''' (1-in-10 arced graduation) – Neon-filled, planar, 203-segment linear [[Dekatron|glow-transfer]] [[Plasma display#History|plasma bar graph displays]] with five cathode strings<ref>{{cite web |url=https://lampes-et-tubes.info/cd/IGT1-203R_b.pdf |title=ИГТ1-203Р data sheet |language=ru |access-date=14 February 2021}} on [https://lampes-et-tubes.info/cd/cd155.php?l=e lampes-et-tubes.info]</ref>*'''<none>''' or '''R''' – Resistive element ([[Electrical ballast#Self-variable resistors|ballast tube]]/[[Iron-hydrogen resistor|barretter]])::*B9D Magnoval {{small|(E55L)}}::—Before the 1950s:::*'''162''' – Y8A ''Steel tube'' 8-pin {{small|(EC162)}}:*'''Microwave tubes:''' Output power <1W; signal device for use as intermediate amplifier or [[RF front end|low-noise receiver front end]]:*'''Microwave tubes:''' Output power ≥1W; power device for use in transmitters:—'''Klystrons:''' Output power in W*'''20AV''' – Vacuum phototube, blue sensitive, B8G Loctal base*'''20CG''' – Gas-filled phototube, Red/IR sensitive, B8G Loctal base*'''20CV''' – Vacuum phototube, Red/IR sensitive, B8G Loctal base—Microwave tubes:*'''HKR''' – [[Sutton tube|Reflex Klystron]]*'''HMD''' – [[Continuous wave|CW]] [[Cavity magnetron|Magnetron]]*'''HMI''' – Pulse Magnetron*'''HRO''' – [[Backward-wave oscillator]]*'''HSE''' – [[Duplexer|TR cell]]*'''HSS''' – ATR cell*'''HT''' – Triode*'''HTG''' – Triode oscillator*'''HWE''' – Signal [[traveling-wave tube]]*'''HWL''' – Power traveling-wave tubeThen a sequentially assigned number, the first one or two digits of which give the frequency in GHz.*'''RA0007A''' (Octal base), '''RA0007B''' (Noval base) – 600 V, 700 µA Directly heated, [[Thermionic emission|thermally-limited (=''saturated'') emission]] diode, 1.4 V/3.5 A<sub>max</sub> uncoated Tungsten filament, usable as a heating current-controlled, variable series resistor in voltage/current stabilizer circuits, or as an [[True RMS converter|RMS heating current-to-DC anode current converter]], or as a [[Noise generator|noise diode]]; cf. 5845, YA1000 [[File:Commons-logo.svg|16x16px|link=:Commons:Category:RA0007A|class=noviewer|alt=]]===Other systems===Since the 1930s, several proprietary systems exist. These tend to be used for devices for professional equipment.Some systems were used by only one manufacturer ([[#List of other letter tubes|{{color|Green|examples}}]]), who sometimes derived a letter prefix from the behavior of devices considered to be exceptional:Other systems grew into informal standards adopted by many manufacturers for their special-purpose/special-quality tubes:*'''[[#700s|{{color|Green|700s}}]]''' – Mainly [[Western Electric]]*'''[[#800s|{{color|Green|800s}}]]''' – Mainly [[RCA]]:*Low 800s – Mainly transmitter output types:*High 800s – Mainly (gas-filled) rectifiers and [[thyratron]]s*'''[[#900s|{{color|Green|900s}}]]''' – Mainly RCA:*Low 900s – Mainly phototubes and photomultipliers:*High 900s – Mainly [[Acorn tube]]s*'''[[#1600s|{{color|Green|1600s}}]]''' – Mainly RCA*'''[[#9000s|{{color|Green|9000s}}]]''' – Mainly RCA VHF/UHF tubes*'''HY''' – [[CBS#Conglomerate|CBS]]/Hytron (Salem, Massachusetts, USA)*'''KU''' – ITT/Kuthe Laboratories (Newark, New Jersey, USA)*'''NL''' – Eimac/National Electronics, Inc. (Geneva, Illinois, USA)*'''1D3''' – [[Control grid#Effects of grid position|Low-mu]] UHF triode, all-glass round cross-section envelope, circular 8-pin/pigtails base;[[Electrical ballast#Self-variable resistors|Ballast tubes]]*'''4A1''' – 300 mA filament*'''7E5''' – Medium-mu RF triode*'''7F8''' – Medium-mu VHF triode, used as FM RF amplifier and converter*'''5845''' – Directly heated, dual 300 V, 1 mA [[Thermionic emission|thermally-limited (=''saturated'') emission]] diode, center-tapped 5 V/435 mA<sub>max</sub> uncoated Tungsten filament, usable as a heating current-controlled, variable series resistor in voltage/current stabilizer circuits, or as an [[True RMS converter|RMS heating current-to-DC anode current converter]], or as a [[Noise generator|noise diode]]; cf. Tesla RA0007, YA1000*'''7296''' – Miniature ceramic/metal disk-seal planar UHF triode for use on [[Printed circuit board|PCB]]s*'''7486''' – Miniature ceramic/metal disk-seal planar UHF triode*'''7588''' – Miniature ceramic/metal disk-seal planar UHF triode for use on PCBs*'''7625''' – Miniature ceramic/metal disk-seal planar AF triode for use on PCBs*'''7720''' – Miniature ceramic/metal disk-seal planar UHF triode for use on PCBs*'''8081''' – Miniature ceramic/metal disk-[[Cermet#Ceramic-to-metal joints and seals|seal]] planar AF triode for use on PCBs*'''8082''' – Miniature ceramic/metal disk-seal planar UHF triode for use on PCBs*'''8083''' – Miniature ceramic/metal disk-seal planar UHF triode for use on PCBs'''[[Iron–hydrogen resistor|Barretters]]''' with a side-contact 8 baseThe six free pins were used as [[Jumper (computing)|jumpers]] to switch the anode supply circuit between 110V and 220V mains*'''C1''' – 80 to 200 V filament for 220V mains*'''C2''' – 35 to 100 V filament for 110V mains*'''C3''' – 100 to 200 V filament with a [[Inrush current limiter|surge-limiting]] [[Uranium dioxide|''Urdox'' (UO<sub>2</sub>)]] power [[thermistor]]*'''C8''' – 80 to 200 V filament*'''C9''' – 35 to 100 V filament*'''C10''' – 35 to 100 V filament*'''C12''' – 80 to 200 V filament*'''DC703''' – Subminiature UHF triode, all-glass round cross-section envelope, circular 5-pin/pigtails base*'''DL650''' = Raytheon '''CK532DX''' – 45 mW Subminiature power pentode, all-glass elliptical cross-section envelope with 5 inline wire-ends, long pigtails, U<sub>Amax</sub> = 30 V, 1.25 V/15 mA filament*'''DL651''' = Raytheon '''CK546DX''' – DL650 with a 1.25 V/10 mA filament*'''DL761''' (6397) – Subminiature RF power pentode, all-glass pigtailed*'''DLL21''' (Octal base), '''DLL25''' (B8G Loctal base) – 1.5 W Dual AF power pentode, center-tapped, 2.8 V/100 mA resp. 1.4 V/200 mA filament*'''DLL31''' – DLL21 with a different pinout*'''EC162''' – RF power triode, Y8A ''steel tube'' base*'''EC866''' – Low-noise UHF triode, Noval base*'''EF861''' – Wideband pentode*'''EF866''' – AF pentode*'''EF905''' = E95F/6AK5W/5654*'''E91H/6687''' – Dual-control heptode with a [[Passivation (chemistry)|passivated]] third grid to reduce [[Secondary emission#Undesirable effects - the tetrode|secondary emission]], for use as a [[NAND gate]] in a [[coincidence circuit]]*'''GA560''' – Directly heated, [[Thermionic emission|thermally-limited (=''saturated'') emission]], vacuum [[Noise generator|noise diode]], 2.5 to 3,5 V/1.9 to 2.2 A uncoated, Thorium-free Tungsten filament, all-glass, 3-pin base*'''K81A''' – Directly heated, [[Thermionic emission|thermally-limited (=''saturated'') emission]], vacuum VHF noise diode, 2.5 A<sub>max</sub> uncoated Tungsten filament, Noval base;[[Iron–hydrogen resistor|Barretters]]*'''YA1000''' – 5 kV, 5 mA Directly heated, [[Thermionic emission|thermally-limited (=''saturated'') emission]] diode, 4.3 V/325 mA<sub>max</sub> uncoated Tungsten filament, Noval base, for use as an [[True RMS converter|RMS heating current-to-DC anode current converter]] in AC voltage/current stabilizer circuits;<ref>{{cite book |author=<!--Staff writer(s); no by-line.--> |title=Wechselspannungs- und Wechselstrom-Stabilisierungsschaltungen mit der Diode YA1000 |pages=189–195 |series=Telefunken Laborbuch |volume=IV |language=de |publisher=AEG-Telefunken |location=Ulm |year=1967}} ([https://www.radiomuseum.org/images/tubeenvdiag_klein/ya_1000_sch.png principal circuit])</ref> cf. 5845, Tesla RA0007*'''29C1''' – 100 V, 3 mA Directly heated, [[Thermionic emission|thermally-limited (=''saturated'') emission]] diode, 4 V/800 mA<sub>max</sub> uncoated Tungsten filament, for use as a heating current-controlled, variable series resistor in voltage/current stabilizer circuits; cf. 5845, YA1000*'''217C''' – Directly heated half-wave vacuum rectifier*'''279A''', '''379A''' – 1.75 kW, Directly heated AF/RF power triode*'''303A''' – Indirectly heated dual diode + triode, 6-pin base*'''304B''' – 50 W, 300 MHz Directly heated VHF power triode, 4-pin base, anode and grid on top wires*'''305A''' – 60 W, 50 MHz Directly heated VHF power tetrode, 4-pin base, anode and both grids on top wires*'''306A''' – 15 W Directly heated RF/AF power pentode, 4-pin base, suppressor grid internally tied to filament center-tap, #1 grid on top cap*'''307A''' – 15 W Directly heated RF/AF power pentode, 5-pin base, anode on top cap*'''309A''' – Remote-cutoff IF/AF pentode, 5-pin base, #1 grid on top cap*'''319A''' – See 267B*'''327A''' (2 A Half-wave), '''328''' (1.3 A Full-wave), '''367''' (6 A Full-wave) – Argon-filled ''[[Rectifier#Tungar|Tungar bulb]]'', a low-voltage rectifier for charging 12V lead-acid batteries*'''342A''' – 25 kW, 4 MHz Water-cooled, directly heated power triode*'''343A''' – 10 kW, 4 MHz Water-cooled, directly heated power triode*'''344H''' = '''8111''' – 3.35 to 3.65 GHz, 1.5 kW [[Traveling-wave tube]]*'''348A''' (#1 grid on top cap), '''349A''' – Pentode, 7-pin base*'''354''' (Philips) – 2 A Half-wave Argon-filled ''Tungar bulb'' for charging 8V lead-acid batteries*'''354A''' (Western Electric) – 1.5 kV, 4 A Argon/Mercury-vapor thyratron, 5-pin base;<ref name="WE287A_323A_354A_355A" /><ref>{{cite web |url=http://www.4tubes.com/1-DATASHEETS/SCANS-Original/!5-Numbers-100--999/354A_WE_Datasheet.pdf |title=354A Electron Tube |publisher=[[Western Electric]] |date=October 1962 |access-date=11 June 2021}}</ref>*'''356A''' (880, 5771, 7085) – 22.5 kW, 25 MHz Water-cooled, directly heated power triode*'''357B''' – 400 W, 100 MHz Forced-air cooled, directly heated power triode*'''371B''' – 25 kV, 300 mA Directly heated half-wave rectifier, U4J Jumbo base*'''376B''' = '''5589''' – Gas-filled cold-cathode trigger triode, one starter electrode, 6-pin base*'''393A''' – 1.25 kV, 1.5 A Argon/Mercury-vapor thyratron*'''396A''' = '''2C51''' – Dual shielded triode, indirectly heated, Noval base*'''398A''' = '''5603''' – 8 W Directly heated power pentode, Octal base*'''400''' – 100 V, 25 mA Half-wave rectifier, 4-pin base, designed for studies of emission and the influence of magnetic fields*'''401A''' = '''5590''' – Pentode, Miniature 7-pin base*'''403B''' = '''5591''' – UHF pentode, Miniature 7-pin base*'''404A''' = '''5847''' – 120 MHz Wide band frame-grid pentode, Noval base*'''407A''' (2C51, 5670) – Dual medium-mu VHF triode, center-tapped 40 V/50 mA resp. 20 V/100 mA heater, Noval base; similar to 20EZ7*'''408A''' – Sharp-cutoff pentode, Miniature 7-pin base*'''411''' – 150 kV ([[Transformer oil|in oil]]) resp. 100 kV (in air), 300 mA<sub>peak</sub> Half-wave rectifier, 4-pin base*'''417A''' – Medium-mu triode, Noval base*'''418A''' – IF/Video tetrode*'''423A''' – 100 V, 4 to 8 mA [[Voltage-regulator tube]], Noval base*'''427A''' = '''6141''' – 100 V, 5 to 40 mA Voltage-regulator tube with a keep-alive (primer) electrode, Noval base*'''430A''' – Gas-filled cold-cathode trigger triode, one starter electrode, [[Radium bromide|RaBr<sub>2</sub>]] keep-alive, 4-pin base*'''502A''' – 600 V, 100 mA Thyratron*'''530''' – 75 kW Water-cooled, directly heated pulsed power triode*'''531''' – 50 kV, 390 mA Forced-air cooled, directly heated, half-wave vacuum rectifier*'''543''', '''558''', '''576A''', '''577''', '''578''', '''582''', '''583''', '''593''' – Directly heated half-wave vacuum rectifiers*'''546''' – 500 V, 20 mA Thyratron, Miniature 7-pin base*'''561''' – 33 kV, 1.25 A Directly heated vacuum rectifier, B4D Superjumbo base with anode top cap*'''572B''' (811A) – 225 W Directly heated RF power triode, 6.3 V/4 A filament*'''575A''' (U4J Jumbo base), '''673''' (B4D Superjumbo base) – 15 kV, 1.5 A [[Mercury-arc valve|Mercury-vapor rectifier]]s*'''596''' – Directly heated full-wave vacuum rectifier===='''600'''s====*'''604''' = '''7014''' (B4D Superjumbo base), '''604L''' = '''7015''' ([[Lug (electrical connector)|Lug/spade connectors]]) – 900 V, 2.5 A Full-wave Argon/Mercury-vapor rectifier*'''606''' = '''7016''' (B4D Superjumbo base), '''606L''' = '''7017''' (Lugs) – 900 V, 6.4 A Full-wave Argon/Mercury-vapor rectifier*'''615''' = '''7018''' – 2 kV, 2.5 A Half-wave Argon/Mercury-vapor rectifier*'''627''' – 1.25 kV, 640 mA Argon/Mercury-vapor thyratron, B4D Superjumbo base with anode top cap*'''629''' – 350 V, 40 mA Argon/Mercury-vapor thyratron, 5-pin base*'''632B''' – 1.5 kV, 2.5 A Mercury-vapor thyratron, 4-pin base with anode top cap and control grid side cap*'''635''' = '''7019''' (B4D Superjumbo base), '''635L''' = '''7020''' (Lugs) – 1 kV, 6.4 A Half-wave Argon/Mercury-vapor rectifier with anode top cap*'''672''' – 2.5 kV, 2.5 A Argon/Mercury-vapor thyratron, B4D Superjumbo base with anode top cap*'''673''' – 10 kV, 1.75 A Half-wave Mercury-vapor rectifier, B4D Superjumbo base with anode top cap*'''676''' – 2.5 kV, 6.4 A Mercury-vapor thyratron, B4D Superjumbo base with anode top cap*'''677''' – 10 kV, 4 A Mercury-vapor thyratron, B4D Superjumbo base with anode top cap*'''678''' – 10 kV, 1.6 A Mercury-vapor thyratron, 4-pin base with anode top cap[[Western Electric]] types 700 to 732 were among 1940's most advanced technologies, and highly classified at the time<ref>{{cite web |url=http://www.hts-homepage.de/WesternElectric/WEsternElectric700.html |title=Western Electric 700er-Serie |language=de |access-date=7 January 2021}}</ref><ref name="MIL-HDBK-213A">{{IA|MIL-HDBK-213A|MIL-HDBK-213A}}</ref>{{rp|178-181}}<ref name="WesternElectricGeneral">[https://static1.squarespace.com/static/5f0983034219c6086e8100ac/t/5f456b4a7d659c36684d762e/1598384980530/Tubes+General.pdf Western Electric General September 10, 1946]</ref>{{rp|1038-1040}}*'''700A/B/C/D''' (WE) – Pulsed [[L band|L-band]] [[Cavity magnetron|Magnetron]], superseded by 4J42<ref name="bstj25-2-167" />{{rp|271ff}}<ref>[https://www.radiomuseum.org/tubes/tube_700a.html 700A on radiomuseum.org]</ref>*'''701A''' (WE) – 100 W Indirectly heated, hard pulse modulator tetrode<ref name="bstj26-4-818">{{cite web |url=http://www.ase-museoedelpro.org/Museo_Edelpro/Catalogo/tubes/docs_pdf/bstj26-4-818.pdf |series=The [[Bell System]] technical journal |title=High-Vacuum Oxide-Cathode Pulse Modulator Tubes |author=C. E. Fay |access-date=11 April 2021 |url-status=live |archive-url=https://archive.org/details/bstj26-4-818 |archive-date=2013-01-19}}</ref>*'''702A''' (WE, Sylvania) – Three-element [[Duplexer|TR/ATR cell]]<ref>{{cite web |url=https://lampes-et-tubes.info/mwtr/702A.pdf |publisher=[[Western Electric]] |title=702A Technical information |access-date=3 March 2012}} • on [https://lampes-et-tubes.info/mwtr/mw015.php?l=e Lampes-et-tubes]</ref><ref name="bstj25-1-48">{{cite web |url=http://www.ase-museoedelpro.org/Museo_Edelpro/Catalogo/Overview/docs/bstj25-1-48.pdf |series=The [[Bell System]] technical journal |title=The Gas-Discharge Transmit-Receive switch |author1=A. L. Samuel |author2=J. W. Clark |author3=W. W. Mumford |access-date=11 April 2021 |url-status=live |archive-url=https://archive.org/details/bstj25-1-48 |archive-date=2013-01-19}}</ref>*'''704A''' (WE) – 1.5 kV, 10 mA UHF diode, half-indirect 4.5 V/500 mA heater, ''Peanut'' 3-wire all-glass pigtailed, anode on top wire<ref>[http://www.ase-museoedelpro.org/Museo_Edelpro/Catalogo/tubes/records_nw/704A/704A.pdf 704A on edelpro]</ref>*'''706AY/GY''' (WE, Westinghouse) – 25 kW, 2.914-3.1 GHz Pulsed [[S band|S-band]] Magnetron;<ref>[http://www.ase-museoedelpro.org/Museo_Edelpro/Catalogo/tubes/records_nw/706A/706A.pdf 706 on edelpro]</ref> modernized 700*'''707A''' (WE) = '''QK26''' (Raytheon) – 2.5 to 3.75 GHz, 75 mW External cavity tuned S-band [[Sutton tube|Reflex Klystron]]<ref>{{cite web |url=https://lampes-et-tubes.info/mwkl/707A.pdf |publisher=[[Western Electric]] |title=707A Technical information |access-date=3 March 2021}} • on [https://lampes-et-tubes.info/mwkl/mw007.php?l=e Lampes-et-tubes]</ref>*'''709A''' (WE) – TR/ATR cell<ref name="bstj25-1-48" />*'''710''' (RCA) = '''6011''' – 1.5 kV, 2.5 A Gas/Mercury-vapor [[thyratron]]<ref>{{cite web |url=https://frank.pocnet.net/sheets/049/7/710.pdf |publisher=[[RCA]] |title=710 data sheet |access-date=3 March 2021}}</ref>*'''713A''' (WE) – Indirectly heated ''Mushroom'' or ''Little Doorknob'' UHF pentode, [[Bakelite]] Octal base, 6.3 V/175 mA heater<ref name="713_717">{{cite web |url=https://frank.pocnet.net/sheets/127/7/713A.pdf |publisher=[[Tung-Sol]] |title=713A, 717A data sheet |access-date=3 March 2021}}</ref>, for use as a [[RF front end|low-noise front end]] in radar receivers; replaced by 6AK5/EF95*'''714''' (National Electronics, RCA) = '''7021''' – 1.25 kV, 1 A Argon/Mercury-vapor thyratron, 4-pin base with anode top cap<ref>{{cite web |url=https://frank.pocnet.net/sheets/201/7/7021.pdf |publisher=Eimac/National Electronics |title=714/7021 data sheet |access-date=3 March 2021}}</ref><ref>{{cite web |url=https://frank.pocnet.net/sheets/049/7/714.pdf |publisher=[[RCA]] |title=714/7021 data sheet |access-date=3 March 2021}}</ref>*'''714AY''' (WE) – S-band Magnetron;<ref>[http://www.ase-museoedelpro.org/Museo_Edelpro/Catalogo/tubes/records_nw/714A/714AY.pdf 714A on edelpro]</ref> further modernized 700*'''716''' (RCA) = '''6855''' – 1.25 kV, 1 A Gas/Mercury-vapor thyratron<ref>{{cite web |url=https://frank.pocnet.net/sheets/049/7/716.pdf |publisher=[[RCA]] |title=716/6855 data sheet |access-date=3 March 2021}}</ref>*'''717A''' (WE, Raytheon) (CV3594, VT269) – 713A with metal shield and a a [[Dielectric loss|low loss]] [[mica]]-filled [[Phenol formaldehyde resin|phenolic resin]] ("Micanol") Octal base;<ref>{{cite web |url=https://lampes-et-tubes.info/tt/717A(WE).pdf |publisher=[[Western Electric]] |title=717A Technical information |access-date=3 March 2021}} • on [https://lampes-et-tubes.info/tt/tt318.php?l=e Lampes-et-tubes]</ref><ref name="713_717" /> replaced by 6AK5/EF95*'''718AY/EY''' (WE, Westinghouse) – S-band Magnetron; further modernization of the 700-type Magnetrons*'''719A''' (WE) – 25 kV, 500 mA Half-wave EHT 10A-pulse rectifier, half-indirect 7 V/7 A heater, B4A 4-pin base with anode top cap,<ref>[https://lampes-et-tubes.info/re/re278.php?l=e 719A on Lampes-et-tubes]</ref> used as a [[Clipper (electronics)|clipper]] in radar applications , not recommended as rectifier*'''720AY-EY''' (WE) – S-band Magnetron;<ref>[https://www.radiomuseum.org/tubes/tube_720.html 720AY on radiomuseum.org]</ref> AY variant replaced by 4J45; BY replaced by 4J46; CY replaced by 4J47*'''721A/B''' (WE, Raytheon, Sylvania) – TR/ATR cell<ref name="bstj25-1-48" /><ref>{{cite web |url=https://lampes-et-tubes.info/mwtr/721A.pdf |publisher=[[Western Electric]] |title=721A Technical information |access-date=3 March 2021}} • on [https://lampes-et-tubes.info/mwtr/mw008.php?l=e Lampes-et-tubes]</ref>*'''722A''' (WE, [[Continental Electronics|Continental]]) – 2.5 kV, 640 mA Directly heated Mercury-vapor thyratron, oxide-coated 3.6 V/8 A filament;<ref>[https://www.radiomuseum.org/tubes/tube_722a.html 722A on radiomuseum.org]</ref> similar to 287A*'''723A/B''' (WE, [[Kentucky Electrical Lamp Company|Ken-Rad]]) = '''2K25''' = '''KS9/20''' – 8.5 to 9.66 GHz, 20 mW [[X band|X-band]] Reflex Klystron<ref>{{cite web |url=https://lampes-et-tubes.info/mwkl/723A_B.pdf |publisher=[[Western Electric]] |title=723A/B Technical information |access-date=3 March 2021}} • on [https://lampes-et-tubes.info/mwkl/mw002.php?l=e Lampes-et-tubes]</ref> used as [[local oscillator]]*'''724A/B''' (WE, Sylvania) – TR/ATR cell<ref name="bstj25-1-48" /><ref>{{cite web |url=https://lampes-et-tubes.info/mwtr/724B.pdf |publisher=[[Western Electric]] |title=724B Technical information |access-date=3 March 2021}} • on [https://lampes-et-tubes.info/mwtr/mw010.php?l=e Lampes-et-tubes]</ref>*'''725A''' (WE, Raytheon) = '''2J21''' (Westinghouse) – 50 kW/180 W Pulsed X-band Magnetron<ref>{{cite web |url=https://lampes-et-tubes.info/mwma/725-A.pdf |publisher=[[Raytheon Technologies|Raytheon]] |title=725-A data sheet |access-date=3 March 2021}} • on [https://lampes-et-tubes.info/mwma/mw118.php?l=e Lampes-et-tubes] • on [http://www.ase-museoedelpro.org/Museo_Edelpro/Catalogo/tubes/records_nw/725A/725A.pdf edelpro]</ref><ref name="2J48-51_2J55-56_4J50_4J52_4J78_725A_730A" />*'''726A/B/C''' (WE) – 2.883 to 3.173 GHz, 100 mW S-band Reflex Klystron,<ref>{{cite web |url=https://lampes-et-tubes.info/mwkl/726B.pdf |title=726B data sheet |access-date=3 March 2021}} • on [https://lampes-et-tubes.info/mwkl/mw005.php?l=e Lampes-et-tubes]</ref> variants differ in frequency only*'''727A''' (WE) – 140 V, 13 mA [[Cold cathode|Cold-cathode]] triode thyratron, all-glass pigtailed, used for relay service;<ref>[https://www.radiomuseum.org/tubes/tube_727a.html 727A on radiomuseum.org]</ref> replaced by 395A*'''728AY/GY''' (WE) – L-band Magnetron;<ref>[http://www.ase-museoedelpro.org/Museo_Edelpro/Catalogo/tubes/records_nw/728DY/728AY%20to%20JY.pdf 728 on edelpro]</ref> replaced by 4J51*'''729A''' (WE) = '''1B23''' – TR/ATR cell<ref>[https://www.radiomuseum.org/tubes/tube_729a.html 729A on radiomuseum.org]</ref>*'''730A''' (WE) – X-band Magnetron<ref name="2J48-51_2J55-56_4J50_4J52_4J78_725A_730A" /><ref>730A on [https://lampes-et-tubes.info/mwma/mw106.php?l=e Lampes-et-tubes] • on [http://www.ase-museoedelpro.org/Museo_Edelpro/Catalogo/tubes/records_nw/730A/730A.pdf edelpro]</ref>*'''731A''' (WE) = 6AK5/EF95 – IF pentode<ref>[https://www.radiomuseum.org/tubes/tube_731a.html 731A on radiomuseum.org]</ref>*'''732A''' (WE) = '''3B24''' – Half-wave EHT rectifier<ref>[https://www.radiomuseum.org/tubes/tube_732a.html 732A on radiomuseum.org]</ref>*'''740L''' = '''7022''' – 1.5 kV, 4 A Argon/Mercury-vapor thyratron, Lug connectors and anode top cap*'''760''' = '''6858''' (B4D Superjumbo base), '''760L''' = '''7023''' (Lugs) – 1.5 kV, 6.4 A Gas/Mercury-vapor thyratron with anode top cap*'''787''' – ''Pliotron Demonstrator'', an educational, directly heated planar triode with a [[phosphor]]ized anode<ref>{{cite web |url=http://n6jv.com/museum/data/WESTINGHOUSE/archives/wl787.pdf |publisher=[[Westinghouse Electric (1886)|Westinghouse Electric]], Bloomfield, New Jersey, USA |title=Westinghouse demonstration tube type WL-787 |date=June 1936 |access-date=1 January 2021}}</ref>*'''879''' = '''2X2''' – [[Cathode-ray tube|CRT]] [[High voltage|EHT]] rectifier with a peak inverse voltage of 12.5 kV and peak anode current of 100 mA, 2.5 V/1.75 A heater, UX4 base==={{anchor|OEF}}'''F'''======={{anchor|OEFP}}'''FP'''====[[General Electric]]:*'''FP400''' – Educational, directly heated, [[Thermionic emission|thermally-limited (=''saturated'') emission]] diode, uncoated Tungsten filament up to 2600 K (bright emitter); similar to the Ferranti GRD7*'''GE10''' – 500 V, 650 µA Directly heated, [[Thermionic emission|thermally-limited (=''saturated'') emission]] diode, 1.8 V/330 mA<sub>max</sub> uncoated Tungsten filament, for use as a heating current-controlled, variable series resistor in voltage/current stabilizer circuits. It has two shorted pins that can be used to disable the circuit if the tube is removed from its socket; cf. 5845, YA1000*'''GRD7''' – Educational, directly heated, [[Thermionic emission|thermally-limited (=''saturated'') emission]] diode, uncoated Tungsten filament, guard rings to ensure a homogeneous anode/cathode field; similar to the General Electric FP400#* 5 V originally for a three-cell lead-acid battery with a variable filament resistor ([[#With a 5 Volts DC filament|{{color|Green|examples}}]]); later became a standard for indirectly AC-heated full-wave rectifiers ([[#5 volt heater/filament tubes|{{color|Green|examples}}]])*'''70B1''' – Voltage reference tube, all-glass pigtailed*'''N77''' = '''6AM5/EL91''', '''N78''' = '''6BJ5''' – Power pentodes, Miniature 7-pin base*'''6702''' (200 to 400 MHz), '''6713''' (0.15 to 30 MHz) – [[Trochotron|''Beam-X Switch'']] modified for use as a [[Noise generator|noise source]] by removing all but the last two spade and grid pairs, thus introducing asymmetries of the already undulated electric field inside, using the principle of random noise generation in a Magnetron-like device operated near cut-off, 6.3 V heater*'''7323''', '''7400''' (top-viewing), '''7401''', '''7979''' – Small Neon-filled cold-cathode thyratrons for use as a latching indicator, all-glass pigtaled; similar to 395A, МТХ-90*'''8414''' – Low (26.5 V) anode voltage, sharp-cutoff, VHF/RF/IF, frame-grid pentode designed for both heater and anode to run directly off the standard [[avionics]] 28-volts DC bus, all-glas pigtails, up to {{cvt|80000|ft|km|lk=on}} altitude; cf. 28D7-W*'''8461''' – 80 kV, 200 kW Water-cooled power triode with three 15 V/200 A (each) filaments for [[Three-phase electric power|3-phase]] operation in series regulator, or hard-tube modulator applications, considerable [[X-ray tube#Hazards of X-ray production from vacuum tubes|X-radiation]]*'''8549''' – 70 kV, 500 kW Water-cooled power triode with a 7.6 V/1.9 kA filament, considerable X-radiation, can deliver 10-ms pulses of 60 MW at 6% duty factor*'''8569''' (ИВ-29↦IV-29) – [[Vacuum fluorescent display]], single pixel, top-view, for use as [[Flip-flop (electronics)|flip-flop]] status indicator in transistorized computers. All-glass pigtailed, 700 mV/35 mA filament; cf. 6977/DM160*'''YD1352S''' = '''8867''' = Amperex '''DX334''' – 5 MHz, 3 kW, Water-cooled ''Neotron'', a gridless ''field-effect tube'' where a magnetically-focused electron beam is modulated by varying the voltage of a gate electrode surrounding it. Used as RF power amplifier or oscillator*'''YH1200''' – 5.8 to 7.5 GHz, 12 W C-band Traveling-wave tube*'''YH1210''' – 220 W Traveling-wave tube for use in UHF TV [[Broadcast relay station|transposers]] between 470 and 860 MHz*'''YL1000''' = '''8463''' – 50 MHz, 12 W RF power pentode, B9A Noval base, 1.1 V/880 mA quickstart heater*'''YL1050''' – 1215 MHz, 1.6 kW Forced-air cooled, coaxial, ceramic/metal UHF power tetrode, 3.8 V/20.5 A heater*'''YL1080''' = '''8348''' – 200 MHz, 5 W Dual VHF power tetrode, Noval base, internally neutralized, 1.6 V/2.5 A quickstart heater*'''YL1070''' = '''8117''' (Center-tapped 12.6/6.3 V heater), '''YL1071''' = '''8116''' (center-tapped 26.5/13.25 V heater) – 60 MHz, 100 W Dual linear RF power tetrode, B7A Septar base*'''YL1120''' = '''8429''' – 60 MHz, 4 kW Forced-air cooled, ceramic/metal, coaxial, linear RF power tetrode, 16 V/16.5 A heater*'''YL1130''' = '''8408''' – 200 MHz, 4 W Dual VHF power pentode, Noval base, internally neutralized, 1.1 V/2.9 A quickstart heater*'''YL1150''' = '''8579''' – 60 MHz, 75 W Linear RF beam power tetrode, Septar base, center-tapped 12.6/6.3 V heater*'''YL1190''' = '''8580''' – 500 MHz, 8 W Dual UHF power tetrode, B9D Magnoval base, internally neutralized, 1.1 V/4.2 A quickstart heater*'''YL1210''' = '''8457''' – [[#QQE03/12|{{color|Green|QQE03/12}}]] with a center-tapped 12.6/6.3 V heater*'''YL1220''' = '''8577''' – [[#QQE02/5|{{color|Green|QQE02/5}}]] with a center-tapped 13.5/6.75 V heater*'''YL1240''' = '''8458''' – 200 MHz, 10 W Dual VHF power tetrode, B9E Novar base, internally neutralized, center-tapped 13.5/6.75 V heater*'''YL1250''' = '''8505''' – 250 MHz, 30 W VHF beam power tetrode, Magnoval base, center-tapped 13.5/6.75 V heater*'''YL1270''' = '''8581''' – 500 MHz, 18 W Dual UHF power tetrode, B8G Loctal base, internally neutralized, 1.1 V/4 A quickstart heater*'''YL1290''' – [[#QE08/200|{{color|Green|QE08/200}}]] with a 19 V/1.4 A heater*'''YL1310''' = '''8603''' – 75 MHz, 30 W RF beam power tetrode, Magnoval base, 1.2 V/4.2 A quickstart heater*'''YL1360''' – [[#QQE04/5|{{color|Green|QQE04/5}}]] with a 13.5 V/280 mA heater*'''YL1370''' = '''6146B''' (6.3 V/1.125 A heater), '''YL1371''' (12.6 V/562 mA heater), '''YL1372''' (26.5 V/300 mA heater) – 60 MHz, 35 W RF beam power tetrode, K8A Octal base*'''YL1570''' (RS1084CJ) – 250 MHz, 60 kW Water-cooled, ceramic/metal, coaxial, linear VHF power tetrode, 12.5 V/200 A heater*'''ZT1011''' = '''XR1/1600A''' = '''8063''' – 1 kV, 1.6 kW Inert gas-filled triode thyratron with anode top cap===='''JNT'''====*'''JNT1/500''' – 1.22 to 1.35 GHz, 600 kW Forced-air cooled, external-magnet, mechanically tunable, pulsed L-band [[Cavity magnetron|Magnetron]]*'''JP8/02B''' – 8.8 GHz, 25 W Forced-air cooled, pulsed Magnetron used in airborne X-band [[Pulse-Doppler radar|Doppler radar systems]]*'''JP9/15''' – 9.345 to 9.405 GHz, 15 kW Forced-air cooled Magnetron for pulsed service===='''JPG'''====*'''JPG9/01''' – 9.15 to 9.60 GHz, 5 W Forced-air cooled, mechanically tunable Magnetron*'''JPT9/01''' – JPG9/01 with a different mechanical tuning arrangement:*'''XR1/1600A''' = '''ZT1011''' = '''8063''' – Improved XR1/1600*'''20TC4''', '''30TC1''' – ''Tacitron''; cf. 6441, EC860*'''395A''' – Small Neon-filled cold-cathode thyratron for use as a latching single-dot indicator, top-viewing, radioactive keep-alive, all-glass pigtaled; similar to 7323, 7400, 7401, 7979, МТХ-90*'''874''' – 90 V, 10 to 50 mA [[Voltage-regulator tube]], UX4 base*'''876''' (1.7 A), '''886''' (2.05 A) – 40 to 60 V [[Iron-hydrogen resistor|Barretter]]s, E39 ''Mogul'' [[Edison screw]] lamp basePowered by a [[Vacuum tube battery|storage battery]] ("B+" anode), and one 1.5 volt [[dry cell]] with a [[rheostat]] ("A" filament)Powered by a storage battery (anode), and one 2 volt [[Lead-acid battery|lead-acid cell]] (filament)Powered by a storage battery (anode), and two lead-acid cells (filament)Powered by a storage battery (anode), and three lead-acid cells (cheap 6 volt vehicle crank battery) with a rheostat (filament)*'''15''' – Sharp-cutoff pentode, 2 V/220 mA heater, designed for [[Autodyne|Autodyne circuits]] requiring a separate (=indirectly heated) cathode, used in [[Antique radio#Farm radios|farm radios]]*'''48''' – Power tetrode, 30 V/400 mA heater, designed for use on 115-volt DC mains systems, popular in 32-volt farm radios where two parallel or push-pull-connected 48s can deliver a modest audio power with anode and screen voltages as low as 28 volt; cf. 28D7-WUsed with a small, wirewound potentiometer across the floating heater supply with its slider tied to signal ground, to cancel out [[mains hum]]*'''10''' – 12 W Power triode, 7.5 V/1.25 A filament; early versions numbered '''UX-210''' or '''CX-310'''*'''26''' – Medium-mu triode, 1.5 V/1.05 A filament, used in early AC radio receivers manufactured in the late 1920s as an RF or AF amplifier, but not as a detector or power output tube; early versions numbered '''UX-226''' or '''CX-326'''*'''45''' – 2 W Power triode, 2.5 V/1.5 A filament; early versions numbered '''UX-245''' or '''CX-345'''*'''46''' – 1.25 W Dual-grid power triode, 2.5 V/1.75 A filament - Grids 1 and 2 connected together for use as push-pull [[Power amplifier classes#Class B|Class-B]] outputs, or #2 grid tied to anode for use as single-tube Class-A audio driver (technically a tetrode)*'''47''' – 2.7 W Power pentode, 2.5 V/1.75 A filament; early versions numbered '''RCA-247''' or '''C-347'''*'''50''' – 4.6 W Power triode, 7.5 V/1.25 A filament, V/ mA filament; early versions numbered '''UX-250''' or '''CX-350'''*'''71-A''' – 790 mW Power triode, 5 V/250 mA filament – this number listed in tube manuals after 1930 for replacements purposes; also referred to as '''171-A'''. Many early versions numbered as '''UX-171-A''' or '''CX-371-A''':*'''6K''' – 6-cavity Klystron:*'''7K''' – 7-cavity Klystron:*'''P''' – [[Airband#Other bands|225 to 390 MHz]]:*'''L''' – 390 to 1550 MHz:*'''S''' – 1.55 to 3.9 GHz:*'''C''' – 3.9 to 6.2 GHz:*'''X''' – 6.2 to 10.9 GHz:*'''K''' – [[K band (IEEE)|10.9 to 36 GHz]]:*'''Q''' – [[Q band|36 to 46 GHz]]:*'''V''' – [[V band|46 to 56 GHz]]*'''3-200A3 = 592''' – 150 MHz, 200 W Glass power triode with anode top cap*'''3-400Z/8163''' – 110 MHz, 400 W Glass power triode with anode top cap*'''3-1000Z/8164''' – 110 MHz, 1 kW Glass power triode with anode top cap*'''3CPN10A5/7815''' (contact/conduction-cooled), '''3CPX100A5/7815R''' (forced-air-cooled) – 3 GHz, 10 W<sub>avg</sub>, 2 kW<sub>peak</sub> Ceramic UHF pulse power triode*'''3CW5000A1/8240''', '''3CW5000F1/8241''' (with flexible leads for grid and filament) – 5 kW Ceramic/metal power triode, water-cooled*'''3CX1000A7/8283''' – 220 MHz, 1 kW Ceramic/metal power triode*'''3CX3000A1/8238''', '''3CX3000F1/8239''' (with flexible leads for grid and filament) – 3 kW Ceramic/metal AF power triode*'''3CX10000A1/8158''' – 10 kW Ceramic/metal AF power triode*'''3CX10000A3/8159''' – 140 MHz, 10 kW Ceramic/metal power triode for use as self-excited high-power oscillator in [[induction heating]] equipment*'''3CX10000A7/8160''' = Siemens '''RS2015CL''' – 110 MHz, 10 kW Ceramic/metal power triode*'''4-400C/6775''' – 110 MHz, 400 W Glass radial-beam power tetrode*'''4CPX250K/8590''' – 500 MHz, 250 W<sub>avg</sub>, 17.5 kW<sub>peak</sub> Ceramic/metal radial-beam grid-pulsed power tetrode*'''4CW2000A/8244''' – 110 MHz, 2 kW Ceramic/metal radial-beam power tetrode; water-cooled variant of 4CX1000A/8168*'''4CX250K/8245''' (6.0 V heater), '''4CX250M/8246''' (26.5 V heater) – 500 MHz, 250 W Ceramic/metal radial-beam power tetrode*'''4CX300A/8167''' – 500 MHz, 300 W Ceramic/metal power tetrode*'''4CX300Y/8561''' – 110 MHz, 300 W Ceramic/metal power tetrode*'''4CX350A/8321''' (6.0 V heater), '''4CX350F/8322''' (26.5 V heater) – 350 W Ceramic/metal radial-beam AF power tetrode*'''4CX350FJ/8904''' – Improved 4CX350F/8322*'''4CX600J/8809''', '''4CX600JA/8921''' (larger anode cooler) – 600 W Ceramic/metal radial-beam AF power tetrode*'''4CX1000A/8168''' (110 MHz), '''4CX1000K/8352''' (with a solid screen ring for UHF use) – 1 kW Ceramic/metal radial-beam power tetrode; forced-air cooled variant of 4CW2000A/8244*'''4CX3000A/8169''' – 150 MHz, 3 kW Ceramic/metal radial-beam power tetrode*'''4CX5000A/8170''' = Siemens '''RS2014CL''', '''4CX5000R/8170W''' (shock/vibration resistant) – 110 MHz, 5 kW Ceramic/metal radial-beam power tetrode*'''4CX5000J/8909''' – 100 MHz, 5 kW Ceramic/metal radial-beam power tetrode*'''4CX10000D/8171''' – 110 MHz, 10 kW Ceramic/metal radial-beam power tetrode; 4CX5000A/8170 with a larger cooler*'''4CX12000A/8989''' – 220 MHz, 12 kW Ceramic/metal radial-beam power tetrode*'''4CX15000A/8281''' – 110 MHz, 15 kW Ceramic/metal radial-beam power tetrode*'''4CX15000J/8910''' – 100 MHz, 15 kW Ceramic/metal radial-beam power tetrode*'''4CX20000A/8990''' – 110 MHz, 20 kW Ceramic/metal radial-beam power tetrode*'''4CM300000G''' – 50 MHz, 300 kW Ceramic tetrode, water/vapor cooled, for use in broadcast transmitters*'''5K50CB''' – [[Ethylene glycol#Coolant and heat-transfer agent|Ethylene glycol]]-cooled, 4.4 to 5.0 GHz, 10 kW electromagnet-focused, 5-cavity Klystron for use in C-band [[Tropospheric scatter|troposcatter systems]]*'''5K70SH''' – Forced-air and water-cooled, [[ISM radio band|2450 MHz]], 30 kW, electromagnet-focused, 5-cavity Klystron for use in [[Dielectric heating|industrial heating applications]]*'''6K50000LQ''' – Forced-air and water-cooled, 720 to 980 MHz, 10 kW, permanent magnet-focused, 6-cavity Klystron*'''7KP50SV''' – 3.43 to 3.57 GHz, 11 kW<sub>avg</sub>, 3 MW<sub>peak</sub>, 7-cavity pulsed Klystron<ref>{{cite web |url=https://frank.pocnet.net/other/Eimac/Eimac_ShortformCatalogue_1964.pdf |title=Eimac Shortform Catalogue |publisher=[[Eimac|Eitel McCullough]] |year=1964 |access-date=7 December 2020}}</ref>{{rp|9}}Eimac also maintained an internal prototype numbering system consisting of the letter X followed by 3 or 4 digits, such as "X-2159".Then a delimiter:* '''/''' (slash) – Philips device (used throughout this list)* '''-''' (dash) – Mullard device{{anchor|MOMP}}Marconi also traded some Mullard-Philips tubes, with a preceding letter '''M''': MAZ1, MAZ41, MCL4, MCY1, MCY2, MDAC21, MDAF40, MDAF41, MDF21, MDK21, MDK40, MDL21, MDL41, MDM21, MEB4, MEBC3, MECH3, MECH21, MECH42, MEF5, MEF6, MEF9, MEK2, MEL3, MEL41, MEM1, MEM34, MKBC1, MUBC41, MUCH42, MUF9, MUF41, MUL41, MUM4, MUY41====One-volt [[Electrical ballast#Self-variable resistors|ballast tubes]]====Used to adapt the above 2 volt DC filament tubes to 2-cell dry batteries*'''1A1''' – 490 mA filament*'''1C1''' – 745 mA filament*'''1D1''' – 240 mA filament*'''1F1''' – 720 mA filament*'''1D2''', '''1G1''' – 420 mA filament*'''1E2''', '''1S1''', '''1W1''' – 660 mA filament*'''1J1''' – 620 mA filament*'''1K1''' – 550 mA filament*'''1R1''', '''1Y1''' – 540 mA filament*'''1T1''', '''1V1''' – 560 mA filament*'''1U1''' – 740 mA filament*'''1Z1''' – 900 mA filament*'''40B2''' – 20 to 60 V [[Iron-hydrogen resistor|Barretter]], Octal base, to stabilize against mains voltage fluctuations*'''50A2''' (with tap for 2 pilot lamps), '''50B2''' (with tap for 1 pilot lamp) – 50 V Barretter, 4-pin base, to stabilize against mains voltage fluctuations*'''40A1''', '''50A1''' – [[Iron-hydrogen resistor|Barretters]] for use as [[Cathode bias|cathode resistors]] of horizontal-deflection output tubes in early TV receivers to stabilize the picture width against mains voltage fluctuations*'''[[8974]]''' (Eimac ''X-2159'') – 30 MHz, 1.5 MW Water-cooled tetrode used for very high-power broadcast and industrial service, two-section 18.5 V/650 A (each) filament*'''EC560''' (2C40) – ''Lighthouse''-type ''disk-seal'' microwave triode*'''EC562''' (2C39B) – ''Lighthouse''-type ''disk-seal'' microwave triode'''Note:''' [[#MOMP|{{color|Green|Marconi}}]] preceded the M-P designation with the letter '''M''', as in MEBC3 for EBC3*'''PL841''' – AF or CRT vertical deflection output power pentode*'''YH1000''' – 1.7 to 2.3 GHz, 16 W [[Traveling-wave tube]] for use in L-band [[Microwave transmission#Microwave radio relay|point-to-point radio links]]*'''YH1050''' – 4.4 to 5.0 GHz, 2 W Traveling-wave tube for use in C-band point-to-point radio links*'''YH1110''' – 5.8 to 8.5 GHz, 15 W Traveling-wave tube for use in C-band point-to-point radio links*'''YH1120''' – 5.8 to 8.5 GHz, 10 W Traveling-wave tube for use in C-band point-to-point radio links*'''YH1131''' – 11.7 to 12.7 GHz, 10 W K<sub>u</sub>-band Traveling-wave tube*'''YH1150''' – 1.7 to 2.3 GHz, 1 kW Traveling-wave tube for use in L-band satellite ground stations/radar/[[Tropospheric scatter|troposcatter]]*'''YH1160''' – 3.6 to 4.2 GHz, 14 W C-band Traveling-wave tube*'''YH1181''' – 4.4 to 5.0 GHz, 1 kW Traveling-wave tube for use in C-band satellite ground stations/radar/troposcatter*'''YH1190''' – 11.7 to 12.7 GHz, 70 W Traveling-wave tube for use in K<sub>u</sub>-band satellite ground stations/radar/troposcatter*'''YK1010''' – 67 to 74 GHz, 130 mW V-band [[Sutton tube|Reflex Klystron]]*'''YK107x''' – 5.9 to 8.1 GHz, 1.2 W C-band Reflex Klystrons, contact/conduction-cooled variants of the YK114x*'''YK1090''' (flying leads), '''YK1091''' (B3A 3-pin base) – 10.5 to 12.2 GHz, 400 mW X-band Reflex Klystrons*'''YK1110''' – Water-cooled 6 MW<sub>peak</sub>, 2998±5 MHz, electromagnet-focused, 3-cavity pulsed Klystron for use in [[linear particle accelerator]]s*'''YK114x''' (KS6/1000x, KS7/1000x) – 5.9 to 8.1 GHz, 1.2 W C-band Reflex Klystrons, forced-air cooled variants of the YK107x*'''YK1200''' – Water-cooled 25 MW<sub>peak</sub>, 2998±5 MHz, electromagnet-focused, 5-cavity pulsed Klystron for use in linear particle accelerators*'''YK1223''' – YK1220 with a modulating anode*'''YK1233''' – YK1230 with a modulating anode*'''KS6/1000x''', '''KS7/1000x''' (YK114x) – 5.9 to 8.1 GHz, 1.2 W Reflex Klystrons*'''KS9/20''' = '''723A/B''' (2K25) – 8.7 to 9.5 GHz, 20 mW Reflex Klystron*'''KS9/30''' (6975) – 8.5 to 9.6 GHz, 30 mW Reflex Klystron*'''KS9/40''' – 9.3 to 9.5 GHz, 40 mW Reflex Klystron*'''LA4/250''' = '''7637''' – 3.6 to 4.2 GHz, 200 mW ''[[Traveling-wave tube|Forward-wave amplifier]]''*'''LA9/3''' = '''7638''' – 7 to 11.5 GHz, 6 mW ''Forward-wave amplifier''*'''LA16/2''' = '''7639''' – 11.5 to 18 GHz, 3 mW ''Forward-wave amplifier''===='''LB'''====*'''LB4/8''' – 3.8 to 4.2 GHz, 8 W ''Forward-wave amplifier''*'''LB6/12''' – 6 GHz, 12 W ''Forward-wave amplifier''*'''LB6/25''' – 5.9 to 6.5 GHz, 25 W ''Forward-wave amplifier''*'''RG4/1250''' = EnglishElectricValve '''AH221''' = M-O '''GU21''' – Half-wave Mercury-vapor rectifier, E40 ''Goliath'' [[Edison screw]] lamp base===='''RR'''====*'''RR3/1250''' – 3.1 kV, 1.25 A Half-wave inert-gas filled rectifier with anode top cap===='''RY'''====*'''RY12/100''' – 12.5 kV, 100 mA Half-wave vacuum rectifier with anode top cap*'''TAW12/35G''' – 12 kV, 35 kW Water-cooled power triode, 3-phase filaments*'''TBL15/125''' – 15 kV, 125 kW Forced-air cooled power triode; TBL12/100 with 3-phase filaments*'''TBW15/125''' – 15 kV, 125 kW Water-cooled power triode; TBW12/100 with 3-phase filaments*'''893''' – 20 kW Water-cooled power triode with 3 independent 10 V/61 A (each) filaments for [[Three-phase electric power|3-phase]] operation in broadcast/industrial applications*'''898''' – 50 kW Water-cooled power triode used in broadcast/industrial applications; improved variant of 862 with 3 independent 33 V/70 A (each) filaments for 3-phase operation*'''3E29''' – Dual beam power tetrode used in radar equipment, Septar 7-pin base with dual anode top cap; a pulse rated variant of the earlier 829B*An initial digit denoting the number of electrodes, or [[Microwave cavity|cavity resonators]] when followed by the letter K::*'''1K''' – [[Sutton tube|Reflex Klystron]]:*'''2K''' – 2-cavity [[Klystron]]:*'''3K''' – 3-cavity Klystron:*'''4K''' – 4-cavity Klystron:*'''5K''' – 5-cavity Klystron*A number to indicate the maximum anode dissipation in watts. This can be exceeded for a short time, as long as the average is not exceeded over the anode's thermal time constant (typically 0.1 sec). In [[Power amplifier classes#Class C|Class-C applications]], the amplifier output power delivered to the load may be higher than the device dissipation. As of 1 May 1961, Klystron maximum collector dissipation is given in kilowatts for brevity:*'''M''' – ''Multiphase''-cooled (water/vapor), or has a modulating anode (Klystrons only):—Klystrons/Klystrodes only::*'''CA''', '''CH''' – [[C band (IEEE)|C band]], coaxial output:*'''CB''', '''CG''', '''CK''', '''CL''', '''CS''' – C band, [[waveguide]] output:*'''LA''' – [[Band IV|UHF low]] (analog TV broadcast <600 MHz):*'''LF''', '''LK''', '''LQ''', '''LR''' – [[Band V|UHF high]] (analog TV broadcast >600 MHz):*'''LT''', '''LX''' – [[L band]]:*'''SH''', '''SI''', '''SJ''' – [[S band]]:*'''XA''' – [[X band]], coaxial output:*'''XD''', '''XF''', '''XG''', '''XK''', '''XN''', '''XS''' – X band, waveguide output*'''5KM300SI''' – Forced-air and water-cooled, 2.1 to 2.4 GHz, 100 kW, electromagnet 5-cavity Klystron for use in ''[[Unified S-band]]'' ground transmitters of [[History of the Deep Space Network|spacecraft communications systems]]*'''GT1''' – Mercury vapor-filled, 1 kV, 300 mA<sub>avg</sub>, 500 mA<sub>RMS</sub>, 1 A<sub>peak</sub> thyratron, 4 V/1.3 A heater, O5A European 5-pin base:*'''GT1A''' – Argon-filled, 300 V, 200 mA<sub>avg</sub>, 300 mA<sub>RMS</sub>, 600 mA<sub>peak</sub> version of GT1:*'''GT1C''' = '''AN1''' – Argon-filled, 500 V, 300 mA<sub>avg</sub>, 500 mA<sub>RMS</sub>, 1 A<sub>peak</sub> version extensively used in the [[Colossus computer]]*'''MKT4''' – 3.2 W Beam power tetrode, 4 V/1 A heater, European 5-pin or British 7-pin base*'''MU12''' = EdiSwan '''UU4''' (350 V), '''MU14''' = '''UU5''' = Mullard '''IW4-500''' (500 V) – Indirectly heated full-wave rectifier, 4 V/2.5 A heater, European 4-pin base*'''6L31''' = 6AQ5/EL90 – Power pentode, 6.3 V/450 mA heater, Miniature 7-pin base*'''7462''' – Miniature all-ceramic disk-seal UHF triode; PCB variant of 7077*'''AN1''' = M-OV/GEC '''GT1C''' – -1300 to +650 V<sub>a</sub>, 300 mA<sub>avg</sub>, 2 A<sub>peak</sub>, 15 A<sub>surge</sub>, Gas-filled triode thyratron with negative control characteristic, 4 V/1.45 A heater, O5A European 5-pin base, for industrial control applicationsThe Chinese 广州曙光无线电厂 ([[Guangzhou]] {{Visible anchor|Shuguang}} Radio Factory) did the reverse, adapting the GOST system (below) to Latin letters for some of their tubes.;<ref>[https://frank.pocnet.net/sheets/095/suppinfo/095.pdf Shuguang 1973 Tube Manual] (in Chinese);</ref>*'''5T8''' – [[Control grid#Effects of grid position|High-mu]] triode + triple diode (two on common cathode with triode, one with independent cathode), Noval base, used as an AF amplifier, AM detector and FM ratio detector in series-heated post-war AM/FM radios; [[#6T8|{{color|Green|6T8}}]], [[#6AK8|{{color|Green|6AK8}}]]/[[#EABC80|{{color|Green|EABC80}}]], 9AK8/PABC80, 19T8/HABC80 or 27AK8/UABC80 with a different heater===='''AAB'''====*'''AAB1''' – Triple diode with common cathode, side-contact 8 base; EAB1 or PAB1 with a different heater===='''ABF'''====*'''ABF1''' – Common cathode dual diode + remote-cutoff RF/IF/AF pentode, side-contact 8 base with control grid on top cap*'''AC102''' – Triode, P7A German PTT 7-pin base with 2 unused pins*[[Philips]] sold a family of 150mA series heater tubes under this letter in South America: OBC1, OBC3/12SQ7GT, OBF2, OCH4, OH4/12A8GT, OF1/6S7G, OF5/12K7GT, OF9 and OM5, used in combination with RETMA types 35Z5 and 50L6'''Note:''' [[Philips]] sold a family of 300mA series heater tubes under this letter in South America: PAB1, PBC3/6SQ7GT, PBF2/6B8G, PF9/6K7G, PH4/6A8G and PM5, used in combination with RETMA types 25L6 and 25Z6===='''PAB'''====*'''PAB1''' – Triple diode with common cathode, side-contact 8 base; AAB1 or EAB1 with a different heater*'''PCE800''' = EdiSwan '''30FL1''' – Triode + low-power semiremote-cutoff beam tetrode, Noval base*[[Philips]] sold a family of 100mA series heater tubes under this letter in South America: UBC1, UBF2, UBL1, UCH4, UF8, UF9, UL1, UM4 and UY1*'''6А2П''' ⟼ '''6A2P''' = '''6BE6/EK90''' = Shuguang '''6A2''' – Heptode [[pentagrid converter]]*'''6А7''' ⟼ '''6A7''' = '''6SA7''' = Shuguang '''6A7P''' – Heptode pentagrid converter*'''6Б8С''' ⟼ '''6B8S''' = (6B8, EBF32, Shuguang 6B8P) – Dual diode + remote-cutoff pentode*'''6Ж1П''' ⟼ '''6J1P''' = '''[[6AK5]]/EF95''' = Shuguang '''6J1''' – Sharp-cutoff pentode*'''6Ж4П''' ⟼ '''6J4P''' = '''6AU6/EF94''' = Shuguang '''6J4''' – Sharp-cutoff pentode*'''6Ж23П''' ⟼ '''6J23P''' (6BK8/6CF8/EF86) – Sharp-cutoff pentode*'''6П27C''' ⟼ '''6P27S''' ([[6CA7]]/EL34) – AF power pentode;{{Visible anchor|Designation systems}}:;{{Visible anchor|Drawings}}:*RCA: [http://www.tubebooks.org/tubedata/hb-3/General/Outlines-Glass_Tubes.pdf Glass] • [http://www.tubebooks.org/tubedata/hb-3/General/Outlines-Metal_Tubes.pdf Metal] • [http://www.tubebooks.org/tubedata/hb-3/General/Bases_Top_Caps-7_Pins.pdf Top caps, 3~7-Pin] • [http://www.tubebooks.org/tubedata/hb-3/General/Bases_8-9%20Pins.pdf 8/9-Pin] • [http://www.tubebooks.org/tubedata/HB-3/General/Bases_10_Pins.pdf 10+ Pin]*KyteLabs: [https://www.qsl.net/dl7avf/roehren/sockel1.html list] • [https://www.qsl.net/dl7avf/roehren/bilder.html drawings]<!-- Also https://www.dl7avf.info/charts/roehren/sockel1.html and https://www.dl7avf.info/charts/roehren/bilder.html -->*[http://tubedata.philipse.info/bases.html Frank Philipse's]*[https://www.qsl.net/dl7avf/roehren/ KyteLabs InfoBase]:*'''PE''' – Trigger pentode, two starter electrodes and a keep-alive (primer) electrode for ion availability:*'''A''' to '''F''' – European 4-pin, K8A Octal, B12A Duodecal [[Phenol formaldehyde resin|phenolic]] bases:*'''G''' to '''T''' – All-glass tubes with B7G Miniature 7-pin, B9A Noval, B13B, B17A, B26A, B27A bases:*'''W''' to '''Z''' – All-glass tubes with wire ends*An optional suffix::*'''/M''' – Trochotron with magnetic shielding:*'''R''' – Shock/vibration-resistant:*'''/S''' – Tested to military specs*'''FC13''' – FC4 with a '''13''' V/200 mA heater and a side-contact 8 base:*'''FC13C''' – FC13 with a British 7-pin base*'''6AN7/ECH80''' – Remote-cutoff [[Pentagrid converter#Hexode|triode/hexode mixer]]; 6CU7/ECH42 with a Noval base*'''6386''' – Dual variable-mu triode for use as VHF cascode amplifiers or in [[Dynamic range compression|audio compressors]]*'''8428''' (2.4 kilowatts), '''8455''' (4 kilowatts) – High pulse power, grid-controlled [[Secondary emission#Special amplifying tubes|electron multiplier]] tubes with a flanged metal envelope and an SO-239 [[UHF connector|UHF output connector]]*'''ECH42/6CU7''' – Remote-cutoff triode/hexode mixer; ECH80/6AN7 with a Rimlock base; UCH42 with a different heater*'''ECH80/6AN7''' – Remote-cutoff triode/hexode mixer;;<ref name="RöTaTa1974" /> ECH42/6CU7 with a Noval base*'''EL21''' – Power pentode, B8G Loctal base;<ref>[https://www.radiomuseum.org/tubes/tube_el21.html EL21 on radiomuseum.org]</ref> related to UL21/UL71; not related to EL71/5902*'''PL302''' – CRT horizontal deflection beam power pentode, Octal base*'''H11''', '''H12''' – Directly heated miniature AF triodes, 2 V/60 mA filament, for use in [[hearing aid]]s; similar to KC50, KC51, Mullard DA1*'''L11''', '''L12''' – Directly heated, miniature AF power triodes, 2 V/60 mA filament, for use in hearing aids; similar to KD50, Mullard DA2, DA3*'''S12''' – Directly heated miniature AF tetrode, 2 V/60 mA filament, for use in hearing aids; similar to KE50, Mullard DAS1*'''DA1''' (2 V/50 mA filament), '''DB1''' (1.5 V/70 mA filament) – Directly heated miniature AF triodes for use in [[hearing aid|'''D'''eaf '''A'''ids]]; similar to DC51, KC50, KC51, Marconi-Osram H11, H12*'''DA2''' (2 V/50 mA filament), '''DA3''' (2 V/55 mA filament), '''DB3''' (1.5 V/70 mA filament) – Directly heated, miniature AF power triodes for use in hearing aids; similar to DD51, KD50, Marconi-Osram L11, L12*'''DAS1''' (2 V/60 mA filament), '''DBS1''' (1.5 V/70 mA filament) – Directly heated miniature AF tetrode for use in hearing aids; similar to DF51, KE50, Marconi-Osram S12*'''GRS251''' – Radiation-cooled 25 kV/300 mA rectifier*'''DC51''' – Directly heated miniature AF triode, 1.5 V/70 mA filament, for use in [[hearing aid]]s;<ref>[https://www.radiomuseum.org/tubes/tube_dc51.html DC51 on radiomuseum.org]</ref> similar to KC50, KC51, Mullard DB1*'''DD51''' – Directly heated miniature AF power triode, 1.5 V/70 mA filament, for use in hearing aids; similar to KD50, Mullard DB3*'''DF51''' – Miniature, 1.5 V/70 mA half-indirectly heated, sharp-cutoff RF/IF pentode;<ref>[https://frank.pocnet.net/short/054/1/145.pdf DF51 vademecum data]</ref> similar to KE50*'''DL51''' – Miniature, 1.5 V/130 mA half-indirectly heated power pentode*'''EC360''' (Center-tapped heater), '''EC362''' (anode on top cap) – Triodes, Octal base, for use in power supplies:*'''EF12K''' – Low-microphonics version of the EF12*'''KC50''' – Triode for use in [[hearing aid]]s, 4-pin base;<ref>[https://www.radiomuseum.org/tubes/tube_kc50.html KC50 on radiomuseum.org]</ref> similar to Marconi-Osram H11, H12, Mullard DA1*'''KC51''' – Triode, 4-pin base;<ref>[https://www.radiomuseum.org/tubes/tube_kc51.html KC51 on radiomuseum.org]</ref> similar to DC51===='''KD'''====*'''KD50''' – Power triode for use in hearing aids, 4-pin base;<ref>[https://www.radiomuseum.org/tubes/tube_kd50.html KD50 on radiomuseum.org]</ref> similar to DD51, Marconi-Osram L11, L12, Mullard DA2, DA3===='''KE'''====*'''KE50''' – Tetrode for use in hearing aids, 4-pin base with anode on top cap;<ref>[https://www.radiomuseum.org/tubes/tube_ke50.html KE50 on radiomuseum.org]</ref> similar to DF51, Marconi-Osram S12, Mullard DAS1==='''Q''' - 2.4 V heater======='''QC'''====*'''QC100''' – Low-microphonics triode<ref>[https://www.radiomuseum.org/tubes/tube_qc100.html QC100 on radiomuseum.org]</ref>===='''QZ'''====*'''QZ100''' – Full-wave rectifier<ref>[https://www.radiomuseum.org/tubes/tube_qz100.html QZ100 on radiomuseum.org]</ref>Further types such as the QD100, QF100,<ref>[https://www.radiomuseum.org/tubes/tube_qf100.html QF100 on radiomuseum.org]</ref> QH100, QLL100, QY100 were under development, but didn't get past the prototyping phase<ref>{{cite web |url=http://www.hts-homepage.de/Wehrmacht/Gemeinschaft/WMGemein.html |title=Behördenröhren (Government tubes) |language=de |access-date=19 July 2020}}</ref>*'''Z71U''' = '''7711''' – Subminiature, 7 mA<sub>avg</sub>, 12 mA<sub>peak</sub>, Gas-filled, cold-cathode DC trigger tetrode, two starters, positive starter voltage, 4-pin all-glass pigtailed, low impedance at audio frequencies for use in a [[Crossbar switch|telephone exchange]]This part dates back to the common valve code key ({{lang-de|[[Wiktionary:Röhre|Röhren]]-[[Wiktionary:Gemeinschaft|Gemeinschaft]]s[[Wiktionary:Schlüssel|schlüssel]]}}) negotiated between Philips and Telefunken in 1933–34. Like the North American system the first symbol describes the heater voltage, in this case a Roman letter rather than a number. Further Roman letters, up to three, describe the device followed by one to four numerals assigned in a semi-chronological order of type development within number ranges assigned to different base types.<ref name="PhilipsMiniwatt1962">{{cite web |url=http://www.radiomanual.info/schemi/Surplus_Handbooks/Miniwatt_technical_data_7th_Philips_1962.pdf |title=Miniwatt Technical Data |edition=7 |publisher="Miniwatt" Electronics Division of Philips Electrical Industries Pty. Limited, 20 Herbert Street, Artarmon, N.S.W., Australia |year=1962 |access-date=27 June 2020}}</ref>The first (1888) incarnation of ''[[La Compagnie des Lampes]]'' produced the [[#O1915|{{color|Green|'''TM''' tube}}]] since 1915 and devised one of the first French systems;<ref name="DecoderLinks" /><ref>{{cite web |url=http://paillard.claude.free.fr/lampes1.pdf |title=Les lampes |language=fr |access-date=1 May 2017}}</ref> not to be confused with Compagnie des Lampes (1921, "French Mazda", see [[#FrenchMazda|{{color|Green|below}}]]). This system was also used by the British {{H:title|The Electrical Trading Assoc., Ltd, Aldwych House, Aldwych, London|ETA}}<ref>[http://www.r-type.org/ephemera/ephe008.htm ''Electrical Trading Association''] on r-type.org</ref>— [[Thyratron]]s:*'''2A4''' – Directly heated triode thyratron, 2.5 V/2.5 A heater, 7-pin base*'''2B4''' = '''885''' – Indirectly heated triode thyratron used in [[DuMont Laboratories|DuMont]] oscilloscopes as a sweep generator; 6Q5-G = 884 with a 2.5 V/2.5 A heater and a 5-pin base*'''2C4''' – Indirectly heated triode thyratron for use in portable equipment, 2.5 V/650 mA heater, Miniature 7-pin baseThese tubes are directly heated with a center-tapped filament, so they can be switched to 1.4 V for use in ''Three-way portable'' (AC or DC mains, or batteries) radio receivers*'''3B5GT''' – AF beam power pentode, Octal base*'''3B7''' – 1.4 W Dual VHF power triode up to 125 MHz, Loctal base*'''3E5''' – 200 mW AF beam power pentode, Miniature 7-pin base*'''3LF4''' – 330 mW AF beam power pentode, Loctal base;5 volt DC filament tubes*'''5A6 ''' – RF beam power pentode up to 100 MHz, Noval base, directly heated with a center-tapped 5.0 V filament, so it can also be wired for 2.5 V'''Note:''' 6-prefix tubes with center-tapped heaters are listed under ''[[#300 mA series heater tubes|{{color|Green|300 mA series heater tubes}}]]''*'''6AU7''' – AF, Medium-[[Control grid#Grid variations|mu]] dual triode; 12AU7/ECC82 with a different, but also center-tapped heater that can be wired for 300 mA/6.3 V or 600 mA/3.15 V*'''6AX7''' – AF, High-mu dual triode; 12AX7/ECC83 with a different, but also center-tapped heater that can be wired for 300 mA/6.3 V or 600 mA/3.15 V*'''6CN7''' – Dual common cathode diode + triode for use az horizontal phase detector and reactance tube in TV receivers; 8CN7 with a different, but also center-tapped heater that can be wired for 300 mA/6.3 V or 600 mA/3.15 V*'''6FA7''' – Diode + sharp-cutoff split-anode tetrode for use as frequency divider or complex-wave generator, 6.3 V/300 mA heater, Noval base*'''6FS5''', '''6GU5''' – Sharp-cutoff, ''Shadow-Grid'' beam pentode with a beam-forming extra grid between control and screen grids, intended to reduce screen current and hence anode/screen grid distribution [[Noise (electronics)|noise]] (technically a hexode), Miniature 7-pin base; cf. DAH50, EF8, EF38*'''7AU7/XCC82''' – 6AU7 Dual triode iwith a 300 mA/7.0 V resp. 600 mA/3.5 V heater*'''8CN7''' – Dual common cathode diode + triode for use as horizontal phase detector and reactance tube in TV receivers; 6CN7 with a different, but also center-tapped heater that can be wired for 225 mA/8.4 V or 450 mA/4.2 V====For fixed/mobile equipment====Many of these tubes have a 150 mA heater and so were popular in [[All American Five|AA5 radio receivers]]; some have 300, 450 or 600 mA heaters for use in TV receivers— '''with a center-tapped heater''', used in:{{ordered list|type=lower-roman|Dual-system (6V and 12V) [[Vehicle audio|car radios]],|Parallel heater circuits - the same tube may be wired for 6.3 or 12.6V,|Series heater strings - the same tube may be wired for e.g. 150 or 300mA}}*'''12A4''' – High-perveance triode for use as vertical deflection amplifier, center-tapped 12.6 V/300 mA resp. 6.3 V/600 mA heater, Noval base*'''12A5''' – Power pentode, U7A base, center-tapped 12.6 V/300 mA resp. 6.3 V/600 mA heater. Mostly used in pre-war car radios*'''12AD7''' – Dual high-mu triode, center-tapped 12.6 V/225 mA resp. 6.3 V/450 mA heater, Noval base*'''[[12AT7]]/ECC81''', 6060, B309, M8162 – High-[[Control grid#Grid variations|mu]] dual triode with a center-tapped 12.6 V/150 mA resp. 6.3 V/300 mA heater. Commonly used as RF amplifier/mixer in VHF circuits<ref name="RCA_12AB5_12AE10_12AT7/ECC81_12AU7A/ECC82_12AX7A/ECC83_12AY7_12AZ7A_12B4A_12BH7A" /> [[File:Commons-logo.svg|16x16px|link=:Commons:Category:12AT7/ECC81|class=noviewer|alt=]]*'''[[12AU7]]/ECC82''', 6067, B329, M8136 – Medium-mu dual triode with a center-tapped 12.6 V/150 mA resp. 6.3 V/300 mA heater.<ref name="RCA_12AB5_12AE10_12AT7/ECC81_12AU7A/ECC82_12AX7A/ECC83_12AY7_12AZ7A_12B4A_12BH7A" /> Two 6C4/EC90s in one envelope;<ref name="Brimar12AU7">{{cite web |url=https://frank.pocnet.net/sheets/184/1/12AU7.pdf |publisher=[[Standard Telephones and Cables|STC]] |title= 12AU7 data sheet |date=August 1950 |access-date=1 May 2017}}</ref> however, it is only specified as an audio frequency device. Commonly used in audio applications and TV receivers [[File:Commons-logo.svg|16x16px|link=:Commons:Category:12AU7/ECC82|class=noviewer|alt=]]*'''12AV7''', 5965 – Medium-mu dual triode with a center-tapped 12.6 V/225 mA resp. 6.3 V/450 mA heater. Principally designed for VHF amplifier/mixer operation.<ref>https://frank.pocnet.net/sheets/127/1/12AV7.pdf</ref>*'''[[12AX7]]/ECC83''', 6057, B327, M8137 – High-mu dual triode with a center-tapped 12.6 V/150 mA resp. 6.3 V/300 mA heater. Very similar to triode section of 6AV6/EBC91. Commonly used in high-gain audio stages<ref name="RCA_12AB5_12AE10_12AT7/ECC81_12AU7A/ECC82_12AX7A/ECC83_12AY7_12AZ7A_12B4A_12BH7A" /> [[File:Commons-logo.svg|16x16px|link=:Commons:Category:12AX7/ECC83|class=noviewer|alt=]]*'''12AY7''' – Dual triode with a center-tapped 12.6 V/150 mA resp. 6.3 V/300 mA heater. Medium gain but low noise, intended for low-level/preamplifier use<ref name="RCA_12AB5_12AE10_12AT7/ECC81_12AU7A/ECC82_12AX7A/ECC83_12AY7_12AZ7A_12B4A_12BH7A" />*'''12AZ7''' – Medium-mu dual triode with a center-tapped 12.6 V/225 mA resp. 6.3 V/450 mA heater, Noval base, for use as AF Amplifier, or combined oscillator and mixer<ref>https://frank.pocnet.net/sheets/127/1/12AZ7.pdf</ref><ref name="RCA_12AB5_12AE10_12AT7/ECC81_12AU7A/ECC82_12AX7A/ECC83_12AY7_12AZ7A_12B4A_12BH7A" />*'''12B4A''' – Low-mu triode with a center-tapped 12.6 V/300 mA resp. 6.3 V/600 mA heater, Noval base<ref name="RCA_12AB5_12AE10_12AT7/ECC81_12AU7A/ECC82_12AX7A/ECC83_12AY7_12AZ7A_12B4A_12BH7A" />*'''12BH7''' – Medium-mu dual triode with a center-tapped heater 12.6 V/300 mA resp. 6.3 V/600 mA heater<ref>https://frank.pocnet.net/sheets/049/1/12BH7A.pdf</ref><ref name="RCA_12AB5_12AE10_12AT7/ECC81_12AU7A/ECC82_12AX7A/ECC83_12AY7_12AZ7A_12B4A_12BH7A" />*[[12BV7|'''12BV7''', '''12BY7/EL180''', '''12DQ7''']] – [[Cathode-ray tube|CRT]] cathode drive power pentodes with a center-tapped 12.6 V/300 mA resp. 6.3 V/600 mA heater<ref>[https://frank.pocnet.net/sheets/191/1/12BY7A.pdf 12BV7, 12BY7/EL180, 12DQ7 data sheet]</ref>*'''12BZ7''' – Dual high-mu triode for use as sync separator and amplifier, center-tapped 12.6 V/300 mA resp. 6.3 V/600 mA heater, Noval base*'''12DF5''' – Dual rectifier with separate cathodes, center-tapped 12.6 V/450 mA resp. 6.3 V/900 mA heater, Noval base*'''12DF7''' – Dual triode, low-microphonics version of 12AX7, center-tapped 12.6 V/150 mA resp. 6.3 V/300 mA heater, Noval base*'''12DM7''' – Dual high-mu triode, low hum, center-tapped 12.6 V/130 mA resp. 6.3 V/260 mA heater, Noval base*'''12DQ7''' – CRT cathode drive beam power pentode, center-tapped 12.6 V/300 mA resp. 6.3 V/600 mA heater, Noval base*'''12DT7''' – Dual high-mu AF triode, center-tapped 12.6 V/150 mA resp. 6.3 V/300 mA heater, Noval base*'''12DW7/ECC832''', '''7247''' – Dual dissimilar audio triode with a center-tapped 12.6 V/150 mA resp. 6.3 V/300 mA heater; one half 12AX7-type triode, other half 12AU7-type triode*'''12GN7/12HG7''' – Sharp-cutoff pentode for use as video amplifier, center-tapped 12.6 V/300 mA resp. 6.3 V/600 mA heater, Noval base*'''12H4''' – Triode, center-tapped 12.6 V/150 mA resp. 6.3 V/300 mA heater, Miniature 7-pin base*'''12HL7''' – Sharp-cutoff pentode for use as video amplifier, center-tapped 12.6 V/300 mA resp. 6.3 V/600 mA heater, Noval base*'''12U7''' – Dual medium-mu triode, center-tapped 12.6 V/150 mA resp. 6.3 V/300 mA heater, Noval base====For mobile equipment====*'''12J8''' – Dual diode + low (12.6-30 V) anode voltage power tetrode, 12.6 V/325 mA heater, Noval base*'''12K5''' – Low (12.6-30 V) anode voltage power tetrode with a [[Tetrode#Space charge grid tube|space charge grid]], 12.6 V/400 mA heater, Miniature 7-pin base; cf. 13П1П, 13П1С*'''12AC6''' – Low (12.6-30 V) anode voltage remote-cutoff pentode, 12.6 V/150 mA heater, Miniature 7-pin base*'''12AE7''' – Low (12.6-16 V) anode voltage dissimilar (medium-mu and low-mu) triodes, 12.6 V/450 mA heater, Noval base*'''12AG6''' – Low (12.6-16 V) anode voltage heptode pentagrid converter, 12.6 V/150 mA heater, Miniature 7-pin base*'''12AL8''' – Low (12.6-30 V) anode voltage medium-mu triode + power tetrode with a space charge grid, 12.6 V/550 mA heater, Noval base*'''12CX6''' – Low (12.6-33 V) anode voltage sharp-cutoff pentode, 12.6 V/150 mA heater, Miniature 7-pin base*'''12DE8''' – Diode + low (12.6-30 V) anode voltage, remote-cutoff pentode, 12.6 V/200 mA heater, Noval base*'''12DK7''' – Dual diode + low (12.6-30 V) anode voltage power tetrode, 12.6 V/500 mA heater, Noval base*'''12DL8''' – Dual diode + low (12.6-30 V) anode voltage power tetrode with a space charge grid, 12.6 V/550 mA heater, Noval base*'''12DS7''' – Dual diode + low (12.6-16 V) anode voltage power tetrode, 12.6 V/400 mA heater, Noval base*'''12DU7''' – Dual diode + low (12.6-16 V) anode voltage power tetrode, 12.6 V/250 mA heater, Noval base*'''12DV7''' – Dual diode + low (12.6-16 V) anode voltage triode, 12.6 V/150 mA heater, Noval base*'''12DV8''' – Dual diode + low (12.6-16 V) anode voltage power tetrode with a space charge grid, 12.6 V/375 mA heater, Noval base*'''12DW8''' – Diode + low (12.6-16 V) anode voltage, dissimilar dual triode, 12.6 V/450 mA heater, Noval base*'''12DY8''' – Low (12.6-16 V) anode voltage medium-mu triode + remote-cutoff pentode, 12.6 V/350 mA heater, Noval base*'''12DZ6''' – Low (12.6-16 V) anode voltage RF pentode, 12.6 V/190 mA heater, Miniature 7-pin base*'''12EA6''' – Low (12.6-16 V) anode voltage IF pentode, 12.6 V/175 mA heater, Miniature 7-pin base*'''12EC8''' – Low (12.6-16 V) anode voltage medium-mu triode + semiremote-cutoff pentode, 12.6 V/225 mA heater, Noval base*'''12EG6''' – Low (12.6-30 V) anode voltage heptode pentagrid converter, both grids 1 and 3 are sharp-cutoff, 12.6 V/150 mA heater, Miniature 7-pin base*'''12EL6''' – Dual diode + low (12.6-30 V) anode voltage, high-mu triode, 12.6 V/150 mA heater, Miniature 7-pin base*'''12EM6''' – Diode + low (12.6-30 V) anode voltage power tetrode, 12.6 V/500 mA heater, Noval base*'''12FA6''' – Low (12.6-30 V) anode voltage heptode pentagrid converter, 12.6 V/150 mA heater, Miniature 7-pin base; car radio version of '''12BE6/HK90'''*'''12FM6''' – Dual diode + low (12.6-30 V) anode voltage, medium-mu triode, 12.6 V/150 mA heater, Miniature 7-pin base*'''12FR8''' – Diode + low (12.6-16 V) anode voltage triode + pentode for use as IF/AF amplifier and detector, 12.6 V/320 mA heater, Noval base*'''12FT6''' – Dual diode + low (12.6-30 V) anode voltage triode for use as detector and AF Amplifier, 12.6 V/150 mA heater, Miniature 7-pin base*'''12FX8''' – Low (12.6-16 V) anode voltage triode/heptode mixer, 12.6 V/270mA heater, Noval base*'''12GA6''' – Low (12.6-16 V) anode voltage heptode pentagrid converter, 12.6 V/150 mA heater, Miniature 7-pin base; similar to type 12FA6, but with lower conversion [[transconductance]]*'''12SW7''' – Dual diode + low (26.5-250 V) anode voltage triode, 12.6 V/150 mA heater, Octal base*'''12SX7GT''' – Low (26.5-300 V) anode voltage dual triode, 12.6 V/300 mA heater, Octal base*'''12SY7''' – Low (26.5-300 V) anode voltage pentagrid converter, 12.6 V/150 mA heater, Octal baseThese tubes operate with their heaters connected directly to the 117 volt (now 120 volt) electrical mains of North America. They are indirectly heated and were used in one-tube [[Phonograph#Piezoelectric (crystal/ceramic) cartridges|phonographs]] and ''Three-way portable'' (AC or DC mains, or batteries) radio receivers*'''20EZ7''' – Dual high-mu AF triode, center-tapped 20 V/100 mA resp. 10 V/200 mA heater, Noval base*'''KY50/2L2''' = '''U25''' (EdiSwan) – [[Cathode-ray tube|CRT]] [[High voltage|EHT]] rectifier, all-glass pigtailed*'''KT2''' – 1 W Beam tetrode, European 5-pin base, 2 V/200 mA filament*'''KT21''' – 1.25 W Beam tetrode, European 5-pin base, 2 V/300 mA filament*'''KT32''' (25L6, 25L6G, 25L6GT, 25W6GT) – 7.5 W Beam tetrode, Octal base, 26 V/300 mA heater for use in AC/DC radio receivers with series heater strings*'''KT33''' (25A6GT) – 5 W Beam tetrode, Octal base, 26 V/300 mA heater for use in AC/DC radio receivers with series heater strings:*'''KT33C''' – KT33 with a center-tapped heater, so it can also be wired for 13 V/600 mA*'''KT36''' – 10 W Beam tetrode, Octal base, 26 V/300 mA heater for use in AC/DC radio receivers with series heater strings*'''KT41''' – 8.6 W Beam tetrode, British 7-pin base, 4 V/2 A heater*'''KT55''' – 25 W Beam tetrode, Octal base, 52 V/300 mA heater for use in AC/DC radio receivers with series heater strings*'''KT61''' (6M6G/EL33) – 4.3 W Beam tetrode, Octal base, 6.3 V/950 mA heater*'''KT63''' (6F6, 6F6G, 6F6GT) – 6 W Beam tetrode, Octal base, 6.3 V/700 mA heater*'''[[KT66]]''' ([[6L6|6L6GC]]) – 7.25 W Beam tetrode, Octal base, 6.3 V/1.27 A heater [[File:Commons-logo.svg|16x16px|link=:Commons:Category:KT66|class=noviewer|alt=]]*'''KT67''' – 25 W RF beam tetrode, B9G 9-pin Loctal base, 6.3 V/1.5 A heater*'''KT71''' (50L6GT)– 5 W Beam tetrode, Octal base, 48 V/160 mA heater for use in AC/DC radio receivers with series heater strings*'''KT77''' ([[EL34|6CA7/EL34]]) – 30 W Beam tetrode, Octal base, 6.3 V/1.4 A heater*'''KT81''' – KT61 with a Loctal base*'''[[KT88]]''' = '''6550A''' = '''CV5220''' (12E13, 7D11) – AF beam power tube, two tubes are capable of providing 100 W output, [[Amplifier#Class AB|Class-AB<sub>1</sub>]], Octal base, 6.3 V/1.6 A heater [[File:Commons-logo.svg|16x16px|link=:Commons:Category:KT88|class=noviewer|alt=]]*'''KTZ41''' – Sharp-cutoff RF/IF beam tetrode, British 7-pin base with control grid on top cap, 4 V/1.5 A heater*'''EBC80/6BD7''' – Shielded dual diode + triode, Noval base*'''EBF81/6AD8''' – Common cathode dual diode + remote-cutoff pentode, Noval base*'''EF81/6BH5''' – Remote-cutoff RF/IF/Video pentode, Noval base*'''EF190/6CB6''' – Remote-cutoff RF pentode for use in video IF circuits*'''EY189/6AL3''' – Half-wave rectifier, Noval basepl:Cokół (lampy) tube base gallery, added a tube envelope gallery, specified bases*'''4-65A''' (''8165'') – 65 W Glass [[beam tetrode]], 5-pin Septar base with anode top cap:*'''10–19''' – Y8A ''steel tube''::*'''60–64''' – B9G 9-pin Loctal:*'''500–529''' – B9D Magnoval or B9E Novar; Pro Electron-issued:*'''ГД''' ⟼ '''GD''' – [[Longwave]] tube ({{lang-ru|[[Wiktionary:длинный|'''Д'''линный]] |links=no}}) "Long"):*'''ГК''' ⟼ '''GK''' – [[Shortwave radio|Shortwave]] tube (≤30 MHz; {{lang-ru|[[Wiktionary:короткий|'''К'''ороткий]] |links=no}}) "Short"):*'''ГУ''' ⟼ '''GU''' – VHF tube (≤300 MHz; {{lang-ru|[[Wiktionary:ультра-|'''У'''льтра]]коро́ткий |links=no}}) "Ultra-short" [wave tube]):*'''ГС''' ⟼ '''GS''' – [[Microwave]] tube (>300 MHz; {{lang-ru|[[Wiktionary:сверх-|'''С'''верх]][[Wiktionary:высоко|высоко]][[Wiktionary:частотный|частотный]] |links=no}}):*'''ГП''' ⟼ '''GP''' – Power tube for use in shunt or series-pass voltage regulators:*'''ГР''' ⟼ '''GR''' – [[Mercury-arc valve|Mercury-vapor rectifier]] ({{lang-ru|[[Wiktionary:ртуть|'''Р'''туть]] |links=no}}) "Mercury"):*'''ГШ''', '''ГШП''' ⟼ '''GSha''', '''GShaP''' – [[Noise generator|Noise diode]] ({{lang-ru|[[Wiktionary:шум|'''Ш'''ум]] |links=no}}) "Noise"):*'''ЛИ''' ⟼ '''LI''' – [[Video camera tube]] or [[monoscope]] ({{lang-ru|[[Wiktionary:изобразить|'''И'''зобразить]] |links=no}}) "to picture"):*'''ЛК''' ⟼ '''LK''' – CRT for TV with magnetic deflection ({{lang-ru|'''К'''инеско́п |links=no}}), meaning "[[:ru:Кинескоп|picture tube]]", not "[[Kinescope]]"):*'''ЛН''' ⟼ '''LN''' – [[Storage tube]] ({{lang-ru|[[Wiktionary:накопить|'''Н'''акопить]] |links=no}}) "to stockpile"):*'''ЛНС''' ⟼ '''LNS''' – [[Charactron|Typotron]] ({{lang-ru|[[Wiktionary:символ|'''С'''имвол]]; Знакопечатающая запоминающая трубка |links=no}}) "Symbol/Character/Glyph"; "Typographic memory tube"):*'''ЛП''' ⟼ '''LP''' – [[Trochotron]] ({{lang-ru|электронно-лучевой [[Wiktionary:переключатель|'''п'''ереключатель]] |links=no}}) "Electron beam switch"):*'''ТХ''', '''ТХИ''', '''МТХ''' ⟼ '''TH''', '''THI''', '''MTH''' – Gas-filled, cold-cathode thyratron ({{lang-ru|[[Wiktionary:холодный|'''Х'''олодный]]|links=no}} "Cold")*'''1U6''' – 1L6 with a 1.4 V/25 mA filament*'''2E5''' – Top-view, "Magic Eye"-type [[Magic eye tube|tuning indicator]]; '''2G5''' with a sharp-cutoff driver triode; '''6E5''' with a different heater*'''2G5''' – Top-view, "Magic Eye"-type tuning indicator; '''2E5''' with a remote-cutoff driver triode; '''6G5/6U5''' with a different heater*'''6A6''' – Dual Power Triode, used as a [[Amplifier#Class A|Class-A]] audio driver or a [[Amplifier#Class B|Class-B]] audio output. Septar base. 6.3 volt heater version of type '''53''' which had a 2.5 volt heater. Octal version – '''6N7'''*'''6AB5/6N5''' – Top-view, "Magic Eye"-type [[Magic eye tube|tuning indicator]] with a sharp-cutoff driver triode*'''6AD6-G''' and '''6AF6-G''' – Top-view, driverless "Magic Eye"-type tuning indicators...*'''6AL7-GT''' – Top-view, driverless, triple (independently controllable) bar graph-type tuning/level indicator used in many early AM/FM [[High fidelity|Hi-Fi]] radios*'''6E5''' – Top-view, "Magic Eye"-type tuning indicator, U6A base; '''6G5/6U5''' with a sharp-cutoff driver triode; '''2E5''' with a different heater*'''6G5/6U5''' – Top-view, "Magic Eye"-type tuning indicator, U6A base; '''6E5''' with a remote-cutoff driver triode; '''2G5''' with a different heater:*'''6G5G/6U5G''' – 6G5/6U5 with an Octal base*'''6GM5''' – 19 W Beam power pentode; 7591 or 7868 with a noval base*'''6H5''' – Top-view, "Magic Eye"-type tuning indicator, U6A base; '''6G5/6U5''' with an extra grid tied to the cathode and a fixed 90° shadow oppopsite the controllable one*'''6ME5''' – Top-view, "Magic Eye"-type tuning indicator, Miniature 7-pin base B7G*'''6N5''' – See '''6AB5/6N5'''*'''6Q5-G''' = '''884''' – Triode gas [[thyratron]] used in [[DuMont Laboratories|DuMont]] oscilloscopes as a sweep generator; 2B4 = 885 with a 6.3 V/600 mA heater and an Octal base*'''6T5''' – Top-view, "Magic Eye"-type tuning indicator with a remote-cutoff driver triode, U6A base; '''6G5/6U5''' with a ring-shaped indicating area that varies its inner diameter with the signal strength*'''6U5''' – See '''6G5/6U5'''*'''7591''' – 19 W Beam power pentode; 6GM5 or 7868 with a 7-pin Octal base. Found in many guitar amps made by [[Gibson Guitar Corporation|Gibson]] and [[Ampeg]] [[File:Commons-logo.svg|16x16px|link=:Commons:Category:7591A (vacuum tube)|class=noviewer|alt=]]*'''7868''' – 19 W Beam power pentode; 6GM5 or 7591 with a Novar (Magnoval) base. Found in many of the once popular ''Challenger'' series ''PA'' amps made by Bogen Communications, also found in some guitar amplifiers made by Ampeg*'''ACH1''' – Remote-cutoff [[Pentagrid converter#Hexode|triode/hexode mixer]], European ''Hexode'' 7-pin base with hexode control grid1 on top cap; BCH1 with a 4 V/1 A heater*'''AZ11''' – Full-wave rectifier, AZ1 with Y8A ''steel tube'' base*'''AZ12''' – Full-wave rectifier, AZ4 with Y8A ''steel tube'' base*'''DCH22''' – Remote-cutoff triode/hexode mixer, B8G Loctal base*'''DF23''' – Remote-cutoff RF/IF pentode, B8G Loctal base*'''DL26''' – Power pentode, B8G Loctal base*'''EB1''' – Dual diode, side-contact 5 base*'''EB2''' – Dual diode, side-contact 5 base<ref name="TFKtubes" />*'''EB11''' – Dual diode with separate cathodes; EB4 or EB34 with a Y8A ''steel tube'' base*'''EB34''' – Dual diode with separate cathodes; EB4 or EB11 with an Octal base*'''EC53''' – VHF triode for use as an oscillator up to 600 MHz, 3-pin base with grid and anode on top caps*'''EK2''' – Remote-cutoff octode pentagrid converter with #4 grid on top cap; similar to AK2; EK32 with a side-contact 8 base*'''EK3''' – Remote-cutoff beam octode pentagrid converter, side-contact 8 base with #4 grid on top cap; similar to AK2; CK3 with a different heater*'''EM800''' – Side-view, bar graph-type tuning/level indicator, noval B9A base===='''FDD'''====*'''FDD20''' – Common cathode dual power triode, 12.6 V/350 mA heater, side-contact 8 base - available with two different pinouts;<ref>[https://frank.pocnet.net/short/052/3/372.pdf FDD20 vademecum data], [https://www.jogis-roehrenbude.de/Roehren-Geschichtliches/Trioden/FDD20/FDD20_Sockel_Codex_1.gif pinouts]</ref> similar to 53, 6A6, 6N7G===='''PCE'''====*'''PCE82''' – Triode - CRT drive beam tetrode*'''VY2''' – 250 V, 20 mA Half-wave rectifier, 30 V heater, side-contact 5 base*'''QB3/200''' (4-65A, 8165) – Beam tetrode, 5-pin Septar base with anode top cap*'''829''' – An indirectly heated dual VHF beam power tetrode. Two 6.3 volt heaters sharing a common tap, Septar base with dual anode top cap*'''884''' = '''6Q5-G''' ([[DuMont Laboratories|DuMont]]) – An indirectly heated triode [[thyratron]]; 885 with a 6.3 V/600 mA heater and an Octal base. Once commonly used as a horizontal sweep sawtooth generator in oscilloscopes*'''885''' = '''2B4''' (DuMont) – 884 with a 2.5 V/1.4 A heater and an UY5 (UY) base*'''6С33С''' ⟼ '''6S33S''' – Power triode for use in series-pass voltage regulators, Septar base [[File:Commons-logo.svg|16x16px|link=:Commons:Category:6S33S|class=noviewer|alt=]]*'''ГИ-7Б''' ⟼ '''GI-7B''' – Forced-air cooled, half-indirectly heated impulse triode up to 3.3 GHz*'''ГИ-70Б''' ⟼ '''GI-70B''' – ГИ-7Б without heat sink, for use with other cooling methods*'''ГМ-70''' ⟼ '''GM-70''' – 125 W Modulator triode*'''ГС-31Б''' ⟼ '''GS-31B''' – Half-indirectly heated UHF transmitter triode, 360 mW@500 MHz, 180 mW@1 GHz*'''ГС-37''' ⟼ '''GS-37''' – Half-indirectly heated ceramic/metal SHF [[frequency multiplier]] triode up to 8 GHz*'''ГУ-29''' ⟼ '''GU-29''' – Indirectly heated, dual VHF beam power tetrode*'''ГУ-78Б''' ⟼ '''GU-78B''' – Linear VHF transmitter tetrode up to 250 MHz*'''3S4/DL92''' – 270 mW AF power pentode, Miniature 7-pin base, 2.8 V/50 mA resp. 1.4 V/100 mA filament:*'''3S4-SF''' = '''3S4T''' = '''3W4''' – 3S4/DL92 with a 2.8 V/25 mA resp. 1.4 V/50 mA filament [[File:Commons-logo.svg|16x16px|link=:Commons:Category:3S4T|class=noviewer|alt=]]*'''AB1''' – Dual common cathode signal diode, 650 mA heater, 5-pin base*'''AB2''' – AB1 with a side-contact 5 base; CB2 with a different heater*'''ABC1''' – Dual diode + triode, side-contact 8 base, CBC1 with a 4 V/650 mA heater*'''ABL1''' – Dual diode + 9-watts power pentode, EBL1 with a 4 V/2.4 A heater*'''AC2''' – Triode for use as AF amplifier or as oscillator together with an AH1 mixer; side-contact 8 base, EC2 with a 4 V/650 mA heater*'''AC50/4686''' – 3 mA<sub>avg</sub>, 300 mA<sub>peak</sub>, Argon-filled triode [[thyratron]], side-contact 8 base with grid on top cap, for [[relaxation oscillator]]s up to 50 kHz; 4 V/600 mA heater*'''AD1''' – ''Directly'' heated, 4.2 W power triode, side-contact 8 base, 4 V/950 mA filament*'''AF2''' – Remote-cutoff pentode, 4 V/1.1 A heater*'''{{Visible anchor|AF3}}''' – Remote-cutoff pentode, side-contact 8 base, CF3 with a 4 V/650 mA heater*'''{{Visible anchor|AF7}}''' – Sharp-cutoff pentode, side-contact 8 base, 4 V/650 mA heater*'''AH1''' – Remote-cutoff hexode for use as mixer or RF gain control, side-contact 8 base, CH1 with a 4 V/650 mA heater*'''AH100''' – Remote-cutoff hexode for use as mixer or RF gain control*'''AK1''' – Octode [[pentagrid converter]], U7A base, 4 V/650 mA heater*'''AK2''' – Octode pentagrid converter, side-contact 8 base, CK1 with a 4 V/650 mA heater; similar to EK2*'''AL1''' – 3.1 W AF power pentode, side-contact 8 base, 4 V/1.1 A heater*'''AL2''' – 3.8 W AF power pentode, side-contact 8 base, 4 V/1 A heater*'''AL4''' – AF power pentode, EL3N with a 4 V/1.75 A heater*'''AL5''' – AF power pentode, [[#EL5|{{color|Green|EL5}}]] with a 4 V/2 A heater*'''AL860''' – ''Directly'' heated, 3 W RF/AF power pentode, noval base; center-tapped, 4.8 V/280 mA resp. 2.4 V/560 mA filament*'''AM1''' – Top-view, "Magic Cross"-type [[Magic eye tube|tuning indicator]], side-contact 8 base, EM1 with a 4 V/300 mA heater*'''AZ1''' – 100 mA Full-wave rectifier, side-contact 8 base [[File:Commons-logo.svg|16x16px|link=:Commons:Category:AZ1 (vacuum tube)|class=noviewer|alt=]]*'''AZ2''' – 160 mA Full-wave rectifier, side-contact 8 base*'''AZ3''' – 120 mA Full-wave rectifier, side-contact 8 base*'''AZ4''' – 200 mA Full-wave rectifier, side-contact 8 base [[File:Commons-logo.svg|16x16px|link=:Commons:Category:AZ4 (vacuum tube)|class=noviewer|alt=]]*'''CB1''' – Common cathode dual diode, side-contact 5 base, 13 V heater*'''CB2''' – Common cathode dual diode, side-contact 5 base; AB2 with a 13 V heater*'''CBC1''' – Common cathode dual diode + triode, side-contact 8 base, ABC1 with a 13 V heater*'''CBL1''' – Common cathode dual diode + power pentode, side-contact 8 base, 44 V heater*'''CBL6''' – Common cathode dual diode + power pentode, side-contact 8 base, 44 V heater*'''CBL31''' – Common cathode dual diode + power pentode, CBL1 with an Octal base*'''CC2''' – Triode for use as AF amplifier or as oscillator together with an CH1 mixer; side-contact 8 base, AC2 with a 13 V heater*'''CCH1''' – [[Pentagrid converter#Hexode|Triode/hexode mixer]], side-contact 8 base, 20 V heater*'''CCH35''' – Triode/hexode mixer, ECH3 with an Octal base and a 7 V heater*'''CF3''' – Remote-cutoff pentode, side-contact 8 base, [[#AF3|{{color|Green|AF3}}]] with a 13 V heater*'''CF7''' – Sharp-cutoff pentode, side-contact 8 base, [[#AF7|{{color|Green|AF7}}]] with a 13 V heater*'''CF50''' – [[Microphone preamplifier]] sharp-cutoff pentode, side-contact 8 base with control grid on top cap, 30 V heater*'''CH1''' – Remote-cutoff hexode mixer, side-contact 8 base, AH1 with a 13 V heater*'''CK1''' – Octode [[pentagrid converter]], side-contact 8 base, AK2 with a 13 V heater*'''CK3''' – Beam octode pentagrid converter, side-contact 8 base, EK3 with a 19 V heater*'''CL1''' – 5 Watts power pentode for anode voltages above 200 V, side-contact 8 base, 13 V heater*'''CL2''' – 8 Watts power pentode for anode voltages below 200 V, side-contact 8 base, BL2 with a 24 V heater*'''CL4''' – 9 Watts power pentode, side-contact 8 base, 33 V heater*'''CL6''' – 5 Watts power pentode, side-contact 8 base, 35 V heater*'''CY1''' – 250 V, 80 mA Half-wave rectifier, side-contact 8 base, 20 V heater*'''CY2''' – Separate cathodes dual<ref name="DesigConflict">This tube's designation is inconsistent with the scheme</ref> 250 V, 60 mA rectifier, side-contact 8 base, 30 V heater, for use as half-wave rectifier or as [[voltage doubler]]*'''DA90''' – Indirectly heated FM detector diode, Miniature 7-pin base, 1.4 V/150 mA heater*'''DAC21''' – AM detector diode + AF triode, Octal base, 1.4 V/25 mA filament*'''DAC32''' – AM detector diode + AF triode, Octal base, 1.4 V/50 mA filament*'''DAF11''' – AM detector diode + AF pentode, wide-range 0.9-1.5 V/50 mA filament, German 5+3-pin ''steel tube'' base with 1 unused pin*'''DAF40''' – AM detector diode + RF/IF pentode, Rimlock base, 1.4 V/25 mA filament*'''DAF41''' – AM detector diode + AF pentode, Rimlock base, 1.4 V/25 mA filament*'''DAF70''' – Subminiature AM detector diode + AF pentode, all-glass round cross-section envelope, circular 8-pin/pigtails base, 1.25 V/25 mA filament*'''DAF91/1S5''' – AM detector diode + AF pentode, Miniature 7-pin base, 1.4 V/50 mA filament [[File:Commons-logo.svg|16x16px|link=:Commons:Category:1S5T|class=noviewer|alt=]]*'''DAF96/1AH5''' – AM detector diode + AF pentode, Miniature 7-pin base, 1.4 V/25 mA filament*'''DAF191''' – AM detector diode + AF pentode, Miniature 7-pin base, 1.4 V/50 mA filament*'''DAF961''' – AM detector diode + AF pentode, Miniature 7-pin base, 1.2 V/60 mA filament*'''DAH50''' – Diode + low (15-25 V) anode voltage pentode with extra beam-forming rods and a [[Tetrode#Space charge grid tube|space charge grid]] between cathode and control grid (technically a heptode); center-tapped, 2.8 V/25 mA resp. 1.4 V/50 mA filament; cf. 6FS5, 6GU5, EF8, EF38*'''DBC21''' – Dual diode + triode, 1.4 V/50 mA filament*'''{{Visible anchor|DC11}}''' – AF driver triode for [[#DDD11|{{color|Green|DDD11}}]], wide-range 0.9-1.5 V/25 mA filament, German 5+3-pin ''steel tube'' base with 3 unused pins*'''DC70/6375''' – Subminiature UHF triode for [[walkie-talkie]]s, all-glass round cross-section envelope, circular 8-pin/pigtails base, 1.25 V/200 mA filament*'''DC90''' – Triode, FM receiver oscillator/mixer/amplifier, Miniature 7-pin base, 1.4 V/50 mA filament*'''DC96''' – Triode, FM receiver oscillator/mixer/amplifier, Miniature 7-pin base, 1.4 V/25 mA filament<ref name="RöTaTa1974" />*'''DCC90''' – Dual triode, RF amplifier or oscillator, Miniature 7-pin base; center-tapped, 2.8 V/110 mA resp. 1.4 V/220 mA filament*'''DCF60/1V6''' – Triode + pentode, oscillator/mixer, all-glass flat 7-pin pigtailed, 1.25 V/40 mA filament*'''DD960''' – VHF power triode, Miniature 7-pin base; center-tapped, 2.4 V/100 mA resp. 1.2 V/200 mA filament*'''{{Visible anchor|DDD11}}''' – Dual AF power triode, wide-range 0.9-1.5 V/100 mA filament, German 5+3-pin ''steel tube'' base with 1 unused pin – preferred driver is [[#DC11|{{color|Green|DC11}}]]*'''DF11''' – Remote-cutoff RF/IF pentode, wide-range 0.9-1.5 V/100 mA filament, German 5+3-pin ''steel tube'' base with 2 unused pins*'''DF21''' – Sharp-cutoff RF/IF/AF pentode, Octal base, 1.4 V/25 mA filament*'''DF22''' – Remote-cutoff RF/IF pentode, Octal base, 1.4 V/50 mA filament*'''DF33''' – Remote-cutoff RF/IF pentode, Octal base, 1.4 V/50 mA filament<ref name="Vade176" />*'''DF60/5678''' – Subminiature sharp-cutoff RF/IF/AF pentode, all-glass elliptical cross-section envelope with 5 inline wire-ends, long pigtails, 1.25 V/50 mA filament*'''DF61''' – Subminiature sharp-cutoff RF or mixer pentode, all-glass elliptical cross-section envelope with 5 inline wire-ends, long pigtails, 1.25 V/25 mA filament*'''DF62/1AD4''' – Subminiature sharp-cutoff RF pentode, all-glass elliptical cross-section envelope with 5 inline wire-ends, long pigtails, 1.25 V/100 mA filament, for use as RF/IF stage*'''DF63''' – Subminiature remote-cutoff RF pentode, all-glass elliptical cross-section envelope with 5 inline wire-ends, long pigtails, 1.25 V/25 mA filament, for use as RF/IF stage*'''DF64''' – Subminiature AF pentode, all-glass elliptical cross-section envelope with 5 inline wire-ends, long pigtails, 0.625 V/10 mA filament, for use in [[hearing aid]]s*'''DF65''' – Subminiature AF pentode, all-glass round cross-section envelope, circular 5-pin/pigtails base, 0.625 V/13.3 mA filament, for use in hearing aids*'''DF66''' – Subminiature AF pentode, all-glass elliptical cross-section envelope with 5 inline wire-ends, long pigtails, 0.625 V/15 mA filament, for use in hearing aids*'''DF67/6008''' – DF65 with round cross-section envelope, but 5 inline wire-ends*'''DF70''' – Subminiature AF pentode, all-glass round cross-section envelope, circular 8-pin/pigtails base, 0.625 V/25 mA filament, for use in hearing aids*'''DF91/1T4''' – Remote-cutoff RF/IF pentode, Miniature 7-pin base, 1.4 V/50 mA filament*'''DF92/1L4''' – Sharp-cutoff RF/IF pentode, Miniature 7-pin base, 1.4 V/50 mA filament*'''DF96/1AJ4''' – Remote-cutoff RF/mixer pentode, Miniature 7-pin base, 1.4 V/25 mA filament*'''DF97/1AN5''' – Remote-cutoff RF/IF pentode, Miniature 7-pin base, 1.4 V/25 mA filament*'''DF167''' – Subminiature AF pentode, all-glass elliptical cross-section envelope with 5 inline wire-ends, long pigtails, 0.625 V/13.3 mA filament, for use in hearing aids*'''DF191''' – RF pentode, Miniature 7-pin base, 1.4 V/50 mA filament*'''DF668''' – Subminiature RF pentode, all-glass elliptical cross-section envelope with 5 inline wire-ends, 1.25 V/100 mA filament, similar to 1AD4*'''DF669''' – Subminiature RF/IF pentode, all-glass elliptical cross-section envelope with 5 inline wire-ends, 1.25 V/50 mA filament, similar to 5678*'''DF703''' (CK5886) – Subminiature [[electrometer]] pentode, envelope has a moisture-repellent coating, all-glass elliptical cross-section envelope with 5 inline wire-ends, long pigtails, 1.25 V/10 mA filament, for probe amplifiers*'''DF961''' – Sharp-cutoff SW/VHF pentode, Miniature 7-pin base, 1.2 V/60 mA filament*'''D11F''' – ''Acorn'' remote-cutoff RF/IF/AF pentode for portable transceivers, 1.4 V/100 mA filament*'''D12F''' – ''Acorn'' RF/IF/AF pentode for portable transceivers, 1.4 V/240 mA filament*'''DK21''' – Octode beam pentagrid converter, 1.4 V/50 mA filament*'''DK32/1A7''' – Heptode pentagrid converter, 1.4 V/50 mA filament*'''DK40''' – Octode pentagrid converter, 1.4 V/50 mA filament*'''DK91/1R5''' – Heptode pentagrid converter, Miniature 7-pin base, 1.4 V/50 mA filament*'''DK92/1AC6''' – Heptode pentagrid converter, Miniature 7-pin base, 1.4 V/50 mA filament*'''DK96/1AB6''' – Heptode pentagrid converter, Miniature 7-pin base, 1.4 V/25 mA filament*'''DK192''' – Heptode pentagrid converter, Miniature 7-pin base, 1.4 V/50 mA filament*'''DK962''' – Heptode pentagrid converter, Miniature 7-pin base, 1.2 V/60 mA filament*'''DL11''' – 350 mW AF power pentode, wide-range 0.9-1.5 V/50 mA filament, German 5+3-pin ''steel tube'' base with 2 unused pins*'''DL21''' – 700 mW AF power pentode, Octal base, 1.4 V/50 mA filament*'''DL33/3Q5GT''' – 330 mW AF power pentode with a center-tapped, 2.8 V/50 mA resp. 1.4 V/100 mA filament*'''DL41''' – 600 mW Power pentode; center-tapped, 2.8 V/50 mA resp. 1.4 V/100 mA filament*'''DL64''' – Subminiature AF power pentode, all-glass elliptical cross-section envelope with 5 inline wire-ends, long pigtails, for use in [[hearing aid]]s, U<sub>A</sub> = 15 V, U<sub>Amax</sub> = 45 V, 1.25 V/10 mA filament*'''DL65''' – Subminiature AF power pentode, all-glass round cross-section envelope, circular 5-pin/long pigtails base, for use in hearing aids, DL67/6007 with a different pinout, U<sub>A</sub> = 22.5 V, U<sub>Amax</sub> = 45 V, 1.25 V/13 mA filament*'''DL66''' – Subminiature AF power pentode, all-glass elliptical cross-section envelope with 5 inline wire-ends, long pigtails, for use in hearing aids, U<sub>A</sub> = 22.5 V, U<sub>Amax</sub> = 45 V, 1.25 V/15 mA filament*'''DL67/6007''' – DL65 with round cross-section envelope, but 5 inline wire-ends*'''DL68''' – Subminiature AF power pentode, all-glass elliptical cross-section envelope with 5 inline wire-ends, long pigtails, for use in hearing aids, U<sub>A</sub> = 22.5 V, U<sub>Amax</sub> = 45 V, 1.25 V/25 mA filament*'''DL69''' – Subminiature power pentode, all-glass elliptical cross-section envelope with 5 inline wire-ends, long pigtails, U<sub>A</sub> = 90 V, 1.25 V/25 mA filament*'''DL70''' – Subminiature VHF power pentode up to 200 MHz, all-glass round cross-section envelope, circular 8-pin/pigtails base, for use in [[walkie-talkie]]s, U<sub>A</sub> = 150 V, 1.25 V/110 mA filament*'''DL71''' – Subminiature AF power pentode, all-glass round cross-section envelope, circular 8-pin/pigtails base, for use in hearing aids, U<sub>A</sub> = 22.5 V, U<sub>Amax</sub> = 45 V, 1.25 V/25 mA filament*'''DL72''' – Subminiature AF power pentode, all-glass round cross-section envelope, circular 8-pin/pigtails base, for use in hearing aids, U<sub>Amax</sub> = 45 V, 1.25 V/25 mA filament*'''DL73''' (CV2299) – Subminiature VHF power pentode up to 200 MHz, all-glass round cross-section envelope, circular 8-pin/pigtails base, for use in walkie-talkies, U<sub>A</sub> = 150 V, 1.25 V/200 mA filament*'''DL92/3S4''' – 270 mW AF power pentode with a center-tapped, 2.8 V/50 mA resp. 1.4 V/100 mA filament, Miniature 7-pin base [[File:Commons-logo.svg|16x16px|link=:Commons:Category:3S4T|class=noviewer|alt=]]*'''DL93/3A4''' – 1.2 W RF/AF power pentode with a center-tapped, 2.8 V/100 mA resp. 1.4 V/200 mA filament, Miniature 7-pin base*'''DL94/3V4''' – 1.3 W AF power pentode with a center-tapped, 2.8 V/50 mA resp. 1.4 V/100 mA filament, Miniature 7-pin base*'''DL95/3Q4''' – 270 mW AF power pentode with a center-tapped, 2.8 V/50 mA resp. 1.4 V/100 mA filament, Miniature 7-pin base*'''DL96/3C4''' – 440 mW AF power pentode with a center-tapped, 2.8 V/25 mA resp. 1.4 V/50 mA filament, Miniature 7-pin base*'''DL97/3Y4''' – Power pentode with a center-tapped filament, Miniature 7-pin base<ref>[https://www.radiomuseum.org/tubes/tube_dl97.html DL97/3Y4 on radiomuseum.org]</ref>*'''DL98/3B4''' – 1.25 W RF power pentode with a center-tapped, 2.5 V/165 mA resp. 1.25 V/330 mA filament, up to 100 MHz, Miniature 7-pin base*'''DL167''' – 1.8 mW Subminiature AF power pentode, all-glass elliptical cross-section envelope with 5 inline wire-ends, long pigtails, 1.25 V/13.3 mA filament, for use in hearing aids*'''DL192''' – 150 mW AF power pentode with a center-tapped, 2.8 V/50 mA resp. 1.4 V/100 mA filament, Miniature 7-pin base*'''DL193''' – 650 mW AF power pentode with a center-tapped, 1.4 V/200 mA filament, Miniature 7-pin base*'''DL620''' – 110 mW Subminiature power pentode, all-glass elliptical cross-section envelope with 5 inline wire-ends, long pigtails, U<sub>Amax</sub> = 90 V, 1.25 V/50 mA filament*'''DL962''' – 150 mW AF power pentode with a center-tapped, 2.4 V/60 mA resp. 1.2 V/120 mA filament, Miniature 7-pin base*'''DL963''' – RF/AF power pentode with a center-tapped, 2.4 V/100 mA resp. 1.2 V/200 mA filament, Miniature 7-pin base*'''DM21''' – Top-view, "Magic Eye"-type [[Magic eye tube|tuning indicator]], 1.4 V/25 mA filament*'''DM160/6977''' (ИВ-15↦IV-15) – First commercially available [[vacuum fluorescent display]], single segment, side-view, for use as [[Flip-flop (electronics)|flip-flop]] status indicator in [[Wiktionary:transistorized|transistorized]] computers. All-glass pigtailed, 1 V/30 mA filament*'''EBL1''' – Dual diode + 9-watts power pentode, EBL21 or EBL31 with a side-contact 8 base, ABL1 with a different heater*'''ECH2''' – Triode/heptode mixer, side-contact 8 base<ref>[https://frank.pocnet.net/short/054/3/328.pdf ECH2 vademecum data]</ref>*'''ECH3''' – [[Pentagrid converter#Hexode|Triode/hexode mixer]], ECH33 with a side-contact 8 base*'''ECH4''', '''ECH4K''', '''ECH4N''' – Triode/heptode mixer, ECH21 with a side-contact 8 base*'''EF8''' – ''Selektode'', a remote-cutoff pentode with a beam-forming extra grid between control and screen grids, intended to reduce screen current and hence anode/screen grid distribution [[Noise (electronics)|noise]] (technically a hexode), EF38 with a side-contact 8 base*'''EL2''' – Power pentode, EL32 with a side-contact 8 base, control grid on top cap*'''EL3''', '''EL3N''' – Power pentode, EL11 or EL33 with a side-contact 8 base*'''EM1''' (''4678'') – Top-view, "Magic Eye"-type [[Magic eye tube|tuning indicator]], side-contact 8 base*'''EM4''', '''EM4N''' – Dual-sensitivity, top-view, "Magic Eye"-type tuning indicator, EM34 with a side-contact 8 base [[File:Commons-logo.svg|16x16px|link=:Commons:Category:EM4 (vacuum tube)|class=noviewer|alt=]]*'''EM5''' – Dual-sensitivity, top-view, "Magic Eye"-type tuning indicator, EM11 or EM35 with a side-contact 8 base*'''[[25L6]]''' – Beam power pentode, 12L6 or 50L6 with a different heater; besides AA5, also popular for high-speed [[Logic gate|gating]], or as a relay or a [[keypunch]] [[solenoid]] driver, in early computers such as the [[UNIVAC I]], where the heater ran off the equipment's 24-volts supply bus. As the 25L6GT developed [[Hot cathode#Failure modes|cathode poisoning]] after prolonged periods in [[Cut-off (electronics)|cut-off]], the [[#EIA professional tubes system|{{color|Green|EIA}}]]-type 6046 was derived from it, which didn't suffer from this problem [[File:Commons-logo.svg|16x16px|link=:Commons:Category:25L6|class=noviewer|alt=]]::For '''examples''' [[#O - No heater|{{color|Green|see below under '''O'''}}]]. This part lived on in the later [[Pro Electron#Semiconductor diodes and transistors|''Pro Electron'' semiconductor designation system]]*'''6FL2''' = '''ECF812''' – Triode + low-power beam tetrode, noval base, 30FL2 (=PCF812) with a different heater*'''10M2''' = '''UM35''' (UM4) – Dual-sensitivity, top-view, "Magic Eye"-type tuning indicator*'''30C17''' = '''PCF87''' – Triode + remote-cutoff pentode for use as VHF mixer in TV receivers*'''30FL2''' = '''PCF812''' – Triode + low-power beam tetrode, noval base, 6FL2 (=ECF812) with a different heater*'''30PL13''' = '''PCL800''' – Triode - power pentode*'''30PL14''' = '''PCL88''' – Triode - power pentode*'''U26''' = '''2J2/KY80''' – [[Cathode-ray tube|CRT]] [[High voltage|EHT]] rectifier, noval base*'''GT1C''' – Argon-filled, 500 V/300 mA thyratron extensively used in the [[Colossus computer]], 4 V/1.3 A heater, 5-pin base*'''N309''' = '''15A6/PL83''' – CRT cathode drive power pentode*'''1S5/DAF91''' – Diode + sharp-[[Cut-off (electronics)|cutoff]] pentode Class-A amplifier, used as detector and first AF stage in battery radio receivers. Anode voltage in the 67...90 volt range, 50 mA filament:*'''1S5-SF''' = '''1S5T''' = '''1AR5''' – 1S5/DAF91 with a 25 mA filament [[File:Commons-logo.svg|16x16px|link=:Commons:Category:1S5T|class=noviewer|alt=]]*'''6441''' – ... cf. EC860*'''EC860''' – ... cf. 6441*'''ELL80/6HU8''' – Dual AF power pentode, Noval base, PLL80/12HU8 with a different heater*'''KY80/2J2''' = '''U26''' (EdiSwan) – [[Cathode-ray tube|CRT]] [[High voltage|EHT]] rectifier, noval base*'''PLL80/12HU8''' – Dual AF power pentode, ELL80/6HU8 with a different heater*'''ULL80''' – Dual AF power pentode; ELL80, PLL80 with a different heater===='''MC'''====*'''MC1/50''' – 1 kV, 50 W Radiation-cooled triode*'''MC1/60''' – 1 kV, 60 W Radiation-cooled triode*'''MC2/200''' – 2 kV, 200 W Radiation-cooled triode===='''TAL'''====*'''TAL12/10''' – 12 kV, 10 kW Forced-air cooled power triode*'''TAL12/20''' – 12 kV, 20 kW Forced-air cooled power triode*'''TAL12/35''' – 12 kV, 35 kW Forced-air cooled power triode===='''TAW'''====*'''TAW12/10''' – 12 kV, 10 kW Water-cooled power triode*'''TAW12/20''' – 12 kV, 20 kW Water-cooled power triode===='''TBH'''====*'''TBH6/14''' – 6 kV, 14 kW Water/helix-cooled power triode*'''TBH6/6000''' – 6 kV, 6 kW Water/helix-cooled power triode*'''TBH7/8000''' – 7 kV, 8 kW Water/helix-cooled power triode*'''TBH7/9000''' – 7 kV, 9 kW Water/helix-cooled power triode*'''TBH12/25''' – 12 kV, 25 kW Water/helix-cooled power triode*'''TBH12/38''' – 12 kV, 38 kW Water/helix-cooled power triode*'''ACT9''' – 800 W (convection) or 1100 W (forced) '''A'''ir '''c'''ooled '''t'''ransmitting triode up to 15 MHz, with derating up to 80 MHz; 16 V/22 A heater*'''TT21''' = '''7623''' (6.3 V/1.6 A heater), '''TT22''' = '''7624''' (12.6 V/800 mA heater) – 37.5 W AF/RF beam power tetrode up to 30 MHz, derived from [[KT88]]http://www.frank.mif.pg.gda.pl/ got wiped. Trying https://frank.pocnet.net/=={{anchor|NT1910}}List of tubes used in 1910s radio receivers== to =={{anchor|O1915}}List of other tubes before c. 1925====List of other tubes before c. 1925===={{anchor|NT1920}}List of tubes used in 1920s and 1930s radio receivers== to =={{anchor|O1925}}List of other tubes c.1925–35{{anchor|List of tubes used in 1920s and 1930s radio receivers}}====List of other letter tubes== and ==List of other number tubes== into ==List of other tubes since c.1935=====Lettered Loctal tubes used in [[Philco]] radios=== into ==List of other tubes since c.1935==*'''1C8''' – Heptode [[pentagrid converter]], all-glass round cross-section envelope and circular 8-pin/pigtails base*'''1E8''' – Heptode pentagrid converter, all-glass round cross-section envelope, circular 8-pin/pigtails base*'''1A7GT/DK32''' – Heptode [[pentagrid converter]], re-engineered version of types '''1A6''' and '''1D7-G''', designed for use in portable AC/DC/Dry-cell battery radios introduced in 1938. Has 1.4 V/50 mA filament*'''1B7-GT''' – Heptode pentagrid converter, re-engineered version of types '''1C6''' and '''1C7-G''', designed for use in dry-cell battery radios with shortwave bands. Has 1.4 V/100 mA filament*'''[[1L6]]''' – Heptode pentagrid converter for battery radios with 50 mA filament*'''1LA6''' (Loctal) and later '''1L6''' (Miniature 7-pin) – Battery heptode pentagrid converter for [[Zenith Electronics|Zenith]] [[Trans-Oceanic]] [[shortwave radio]], 50 mA filament*'''1LB6''' – Heptode pentagrid converter for battery-operated radios*'''1R5/DK91''' – Heptode pentagrid converter, anode voltage in the 45...90 volt range*'''1A6''' – Heptode [[pentagrid converter]] up to only 10 MHz due to low heater power (2 V/60 mA) and consequent low emission in the oscillator section, also occasionally used as a grid-leak detector*'''1C6''' – Heptode pentagrid converter; '''1A6''', with double the heater power and double the frequency range*'''2A7''' – Heptode [[pentagrid converter]] (Except for heater, electronically identical to types '''6A7''', '''6A8''' and '''12A8''')*'''6A7''' and '''6A8''' (''PH4'', ''X63'') – Heptode [[pentagrid converter]], based on type '''2A7''', which had a 2.5 volt heater. 6A7 has a U7A base with top cap connection for control grid (#4 grid). 6A8 is octal version with top cap connection for control grid. Loctal version: type '''7B8'''*'''6BE6/EK90''', 5750, X727 – Heptode [[pentagrid converter]] (Often encountered in car radios)*'''6D8-G''' – Heptode [[pentagrid converter]]; similar to type '''6A8'''. Octal base with top cap. Has 150 mA heater. Used in pre-war 6-volt [[Antique radio#Farm radios|farm radios]]*'''6L7''' – Heptode [[pentagrid converter]] often used in console radios of the late 1930s. Because of low conversion [[transconductance]], radios using type 6L7 typically have either a tuned RF pre-amplifier stage, or at least two stages of IF amplification (a few models have both); similar in structure to heptodes 6SA7 and 6BE6, except that a separate oscillator – usually type 6C5 – is required, as #1 grid is the RF input, remote-cutoff control grid and #3 grid is the oscillator input grid (in types 6SA7 and 6BE6, #1 grid is the internal oscillator grid, #3 grid is the control grid)*'''6SA7''' – First heptode [[pentagrid converter]]. Octal type. Miniature version: '''6BE6'''*'''6SB7Y''' (Octal base), '''6BA7''' and '''12BA7''' (Noval base) – VHF heptode pentagrids, 1946*'''7B8''' – Heptode [[pentagrid converter]], Loctal version of types '''6A7''' and '''6A8'''*'''7Q7''' – Heptode pentagrid converter; similar to type '''6SA7'''*'''12SA7''' – Heptode pentagrid converter (Octal version of '''12BE6/HK90''')*'''14B8''' – Heptode [[pentagrid converter]], Loctal version of type '''12A8'''*'''14Q7''' – Heptode pentagrid converter; similar to type '''12SA7'''*'''1612''' – Heptode [[pentagrid converter]]; low-microphonics version of type '''6L7'''. Both control grids (1 and 3) are sharp-cutoff===={{anchor|OEESR}}'''ESR'''===={{H:title|Elektronische Steuerapparate AG, Bad Ragaz, Canton of St. Gallen, Switzerland; now a GmbH and a member of the PILZ GmbH & Co. KG group|Elesta}}:<sup>([[:de:Ionisationsrauchmelder#Geschichte|de]])</sup>*'''ESR2''' – Gas-filled, [[cold cathode]] ''Trigger pentode'' (two starter electrodes and a primer electrode) + two [[Voltage-regulator tube|voltage references]], for use in precision timers<ref name="ESR2">{{cite web |url=https://lampes-et-tubes.info/rs/ESR2.pdf |title=Tube relais, avec stabilisateurs incorporés |language=fr |publisher=Elesta |access-date=21 January 2020}}</ref>*'''PBG12205''' = '''BG12205''' ([[Burroughs Corporation|Burroughs]])<ref>[https://lampes-et-tubes.info/cd/BG12205-2.pdf 201-element dual linear bar graph display]</ref> – Neon-filled, planar, dual 201-segment linear glow-transfer bar graph display tube with five cathode strings, for use in VU meters etc.[[Philips]] (Typecode explained [[#Philips system before 1934|{{color|Green|above}}]]):*'''B2''' – Directly heated triode, 1.7 V/150 mA filament*'''B6''' – Directly heated tetrode, 1.7 V/150 mA filament*'''D1''' – Directly heated, gas-filled triode, 3.5 V/500 mA filament, used in 1920s [[Tuned radio frequency receiver|TRF]] and [[Regenerative circuit|regenerative]] radios*'''D2''' – Directly heated triode, 3.5 V/500 mA filament*'''D3''' – Directly heated triode, 3.0 V/500 mA filament*'''D4''' – Directly heated, gas-filled tetrode, 3.5 V/500 mA filament*'''D5''' – Directly heated triode, 3.5 V/500 mA filament*'''D6''' – Directly heated triode, 3.5 V/500 mA filament*'''E''' – Directly heated triode, 4 V/700 mA filament, derived from the French '''TM''' tubehttp://www.mif.pg.gda.pl/homepages/frank/ reflinks to http://www.frank.mif.pg.gda.pl/*'''6F22''' (6267, EF86/6BK8/6CF8) – Low-noise AF pentode, 9-pin noval base*'''[[6BK8]]/6CF8/EF86''', Z729 – Audio Pentode used in [[microphone preamplifier]]s and audiophile equipment [[File:Commons-logo.svg|16x16px|link=:Commons:Category:EF86|class=noviewer|alt=]]*'''EC8010/8556''' – UHF triode for use as amplifier or oscillator up to 1 GHz*'''ECC82/[[12AU7]]''' (''6067, M8136, B329'') – Medium-mu dual triode with a center-tapped heater for use as AF amplifier, noval base, identical to XCC82/7AU7 except for heater ratings. Two EC90/6C4s in one envelope;<ref name="Brimar12AU7" /> however, it is only specified as an audio frequency device [[File:Commons-logo.svg|16x16px|link=:Commons:Category:12AU7/ECC82|class=noviewer|alt=]]*'''ECF801/6GJ7''' – Triode + remote-cutoff pentode for use as VHF mixer in TV receivers, noval base, identical to LCF801/5GJ7, PCF801/8GJ7 and XCF801/4GJ7 except for heater ratings*'''ECF805/6GV7''' – Triode + remote-cutoff pentode for use as VHF mixer in TV receivers, noval base, PCF805/7GV7 with a different heater*'''ECF812''' = '''6FL2''' (EdiSwan) – Triode + low-power beam tetrode, noval base,<ref name="xCF812">[http://www.mif.pg.gda.pl/homepages/frank/sheets/084/e/ECF812.pdf E/PCF812 data sheet]</ref> PCF812 with a different heater*'''EF80/6BX6''' (''Z152'') – Sharp-cutoff RF/IF/Video pentode, noval base, identical to XF80/3BX6, 12BX6 and UF80/19BX6 except for heater ratings [[File:Commons-logo.svg|16x16px|link=:Commons:Category:EF80|class=noviewer|alt=]]*'''[[EF86]]/6BK8/6CF8''' (''6267, Z729'') – AF Pentode, also for use in ''[[Dynatron oscillator|Transitron]]'' circuits in TV receivers. Identical to PF86 and UF86 except for heater ratings, noval base [[File:Commons-logo.svg|16x16px|link=:Commons:Category:EF86|class=noviewer|alt=]]*'''EF806S/6267''' – Ruggedized, long-life AF pentode*'''PCF87''' = '''30C17''' (EdiSwan) – Triode + remote-cutoff pentode for use as VHF mixer in TV receivers<ref>PCF87 on [https://www.radiomuseum.org/tubes/tube_pcf87.html radiomuseum.org], [http://www.r-type.org/exhib/aai0119.htm r-type.org]</ref>*'''PCF800''' (30C15) – Triode + pentode for use as VHF mixer in TV receivers*'''PCF801/8GJ7''' – Triode + remote-cutoff pentode for use as VHF mixer in TV receivers, noval base, identical to ECF801/6GJ7, LCF801/5GJ7 and XCF801/4GJ7 except for heater ratings*'''PCF803''' – PCF801/8GJ7 with separate cathodes*'''PCF805/7GV7''' – Triode + remote-cutoff pentode for use as VHF mixer in TV receivers, noval base, ECF805/6GV7 with a different heater*'''PCF806''' – Triode + sharp-cutoff, frame-grid pentode for use as VHF mixer in TV receivers*'''PCF812''' = '''30FL2''' (EdiSwan) – Triode + low-power beam tetrode, noval base,<ref name="xCF812" /> ECF812 with a different heater*'''UF80/19BX6''' – Sharp-cutoff RF/IF/Video pentode, noval base, identical to XF80/3BX6, EF80/6BX6 and 12BX6 except for heater ratings*'''XCC82/7AU7''' – Dual triode, identical to ECC82/[[12AU7]] except for heater ratings*'''XCF82/5U8''' – Triode + pentode, identical to [[#ECF82|{{color|Green|ECF82/6U8}}]] and PCF82/9U8A except for heater ratings*'''XCH81/3AJ8''' – Triode/heptode oscillator/mixer, ECH81/6AJ8 with a different heater*'''XCL82/8B8''' – AF triode - AF power pentode, identical to [[#ECL82|{{color|Green|ECL82/6BM8}}]], PCL82/16A8 and UCL82/50BM8 except for heater ratings*'''XF80/3BX6''' – Sharp-cutoff RF/IF/Video pentode, noval base, identical to EF80/6BX6, 12BX6 and UF80/19BX6 except for heater ratingswww.geocities.jp/radiomann/ reflinks to radiomann.sakura.ne.jp:*'''A''' – [[Electric arc|Arc discharge]] tube*'''14GT8/7724''', '''14JG8''' – Dual diode + high-mu triode, 14 V heater, Noval base, for use as FM detector and AF amplifier*'''50JY6''' – Horizontal deflection beam power pentode, 50 V heater, Octal base*'''4HK5''' – VHF frame-grid, [[Control grid#Grid variations|variable-mu]] triode, identical to 2HK5, 3HK5 and 6HK5 except for heater ratings*'''58HE7''' – ''[[Compactron]]'' High-perveance damper diode + horizontal deflection beam power pentode, identical to 6HE7, 12HE7 and 38HE7 except for heater ratings*'''42KN6''' – ''Compactron'' Horizontal deflection beam power pentode, 6KN6 with a different heater*'''10DE7''' – Dual triode dissimilar triode for use as vertical deflection oscillator and amplifier, 6DE7 or 13DE7 with a different heater*'''30KD6''' – ''[[Compactron]]'' horizontal deflection beam power pentode, identical to 6KD6 and 36KD6/40KD6 except for heater ratings*'''26A6''' – Remote-cutoff pentode with a 12-cell lead-acid battery heater*'''26A7GT''' – Low (26.5-50 V) anode voltage dual AF beam power pentode designed for both heater and anode to run directly off the standard [[avionics]] 28-volts DC bus, for use as a push–pull audio amplifier; cf. 13П1П, 13П1С*'''26BK6''', '''26C6''' – Dual diode + triode with a 12-cell lead-acid battery heater*'''26D6''' – Heptode pentagrid with a 12-cell lead-acid battery heater*'''26E6WG''' – Avionics AF beam power pentode*'''26Z5W''' – Avionics dual rectifier with separate cathodes*'''Z860A''' – 250 V [[Electric arc|Arc discharge]] tube for use as switching element in a high voltage pulse generator such as an electric fence energizer, noval base*'''Z861A''' – 450 V Arc discharge tube, noval base*'''Z862A''' – 650 V Arc discharge tube, noval base*'''Z960A''' – 75 V [[Surge protector#Gas discharge tube (GDT) Spark Gap|Cold-cathode surge protector]] for receiver front ends, Miniature 7-pin base*'''Z0.7/10U''' – 700 V, 500 mA<sub>avg</sub>, 10 A<sub>peak</sub>, Gas-filled, cold-cathode DC arc trigger tetrode, one starter and a primer electrode, positive starter voltage<ref name="DesigConflict" />*'''Z0.7/100U''' – 700 V, 2 A<sub>avg</sub>, 100 A<sub>peak</sub>, Gas-filled, cold-cathode DC arc trigger tetrode, one starter and a primer electrode, positive starter voltage, for triggering Ignitrons<ref name="DesigConflict" />*'''Z1/100U''' – 1 kV, 2 A<sub>avg</sub>, 100 A<sub>peak</sub>, Gas-filled, cold-cathode DC arc trigger tetrode, one starter and a primer electrode, positive starter voltage, for use in welding machines<ref name="DesigConflict" />==={{anchor|RuP}}Professional tubes===*'''СО-242''' ⟼ '''SO-242''' – Heptode with an oxide-coated cathode*'''БХ''', '''БХВ''', '''БСМ''', '''БСВ''' ⟼ '''BH''', '''BHV''', '''BSM''', '''BSV''' – [[X-ray tube]]:*'''ВГ''' ⟼ '''VG''' – Gas-discharge or Mercury-vapor rectifier:*'''ЛС''' ⟼ '''LS''' – [[Charactron]] ({{lang-ru|Знакопечатающая трубка}} "Typographic tube")*'''М''' ⟼ '''M''' – [[Cavity magnetron|Magnetron]]:*'''МИ''' ⟼ '''MI''' – Pulse Magnetron*'''СБМ''', '''СБС''', '''СБТ''', '''СИ''', '''СГМ''', '''СТС''' ⟼ '''SBM''', '''SBS''', '''SBT''', '''SI''', '''SGM''', '''STS''' – [[Geiger–Müller tube]]:*'''ФЭК''' ⟼ '''FEK''' – High-speed pulse phototube with a coaxial output connector*'''28D7-W''' – Low (28-100 V) anode voltage dual AF beam power pentode designed for both heater and anode to run directly off the standard avionics 28-volts DC bus, shock resistant up to 350 [[g-force|g]], for use as a push–pull audio amplifier, or as switching element of a self-excited [[Push–pull converter|push–pull DC/DC converter]] to provide up to 725 mW of anode high voltage supply for conventional tubes; cf. 13П1П, 13П1С*'''6498''' – ''Memotron'', a [[storage tube]]<ref>{{cite web |url=http://www.mif.pg.gda.pl/homepages/frank/sheets/201/6/6498.pdf |publisher=[[Hughes Aircraft Company]] |title=''6498 Memotron 5-inch Bright Display Cathode-Ray-Type Storage Tube'' data sheet |date=4 February 1955 |access-date=30 September 2017}}</ref>*'''6499''' – [[Selectron tube|Radechon]], an early form of digital [[computer memory]]<ref>{{cite web |url=http://www.mif.pg.gda.pl/homepages/frank/sheets/049/6/6499.pdf |publisher=[[RCA]] Electron Tube Division |title=''6499 Charge Storage Tube, single beam, barrier-grid type, non-equilibrium write, capacitance-discharge reading'' data sheet |date=August 1956 |access-date=30 September 2017}}</ref>*'''ОГ-3''' ⟼ '''OG-3''' – Bidirectional decade ''Counter [[Dekatron]]'' up to 20 kHz, filled with a Helium/Hydrogen mixture, violet glow*'''ОГ-4''' ⟼ '''OG-4''' – Bidirectional decade ''Counter Dekatron'' up to 2 kHz, Neon-filled, orange-red glow*'''ОГ-5''' ⟼ '''OG-5''' – Improved ОГ-4, up to 10 kHz*'''ОГ-7''' ⟼ '''OG-7''' – Decade ''Counter Dekatron'' up to 50 kHz, Argon-filled, blue glow*'''ОГ-8''' ⟼ '''OG-8''' – Unidirectional decade ''Counter Dekatron'' up to 100 kHz, Argon-filled, Argon-filled, blue glow*'''ОГ-9''' ⟼ '''OG-9''' – Unidirectional decade ''Counter Dekatron'' up to 2 kHz, Neon-filled, orange-red glow====Marconi-Osram system==== examples*'''D''' – Dual diode*'''DA''' – More than 25 W power triode:*'''PT''' – Power pentode:*'''PX''' – 3...25 W Power triode:*'''LP''' – Power triode*'''VP''', '''VMP''' – Remote-[[Cut-off (electronics)|cutoff]] pentode*'''VS''', '''VMS''' – Remote-cutoff tetrodeIn most cases, the first digit of the following number is the heater voltage:*'''2''' – 2 V*'''3''' – 13 V or 300 mA*'''4''' – 4 V*'''5''' – 5 V (Rectifiers)*'''6''' – 6 V*'''B30''' – Dual [[Amplifier#Class B|Class-B]] power triode*'''DA30''' – AF power triode, P<sub>a</sub>=40 W*'''DA41''' – AF power triode, P<sub>a</sub>=50 W*'''DA42''' – AF power triode, P<sub>a</sub>=30 W*'''DA60''' – AF power triode, P<sub>a</sub>=60 W*'''DA100''' – AF power triode, P<sub>a</sub>=100 W*'''DA250''' – AF power triode, P<sub>a</sub>=250 W:*'''МН''' ⟼ '''MN''' – ''Mechanotron''-type<sup>([[:ru:Механотрон|ru]])</sup> mechano-electronic displacement [[sensor]]<ref name="Mechanotron">{{cite web |url=https://doi.org/10.1007/BF00981999 |author=Berlin, G.S. |publisher=Kluwer Academic Publishers - Plenum Publishers |pages=24–28 |volume=9 |date=September 1970 |title=''Mechanotron transducers and their use in measurement techniques'' |doi=10.1007/BF00981999 |access-date=1 May 2018}}</ref>:*'''МХ''' ⟼ '''MH''' – ''Mechanotron''-type mechano-electronic displacement sensor:*'''МДХ''' ⟼ '''MDH''' – ''Mechanotron''-type mechano-electronic pressure sensor:*'''МУХ''' ⟼ '''MUH''' – ''Mechanotron''-type mechano-electronic rotation sensor*'''Л''' ⟼ '''L''' – [[Beam deflection tube]] incl. [[Cathode-ray tube|CRTs]] ({{lang-ru|Электронно-'''л'''учевые приборы}} "Electron beam device", "CRT"):Most CRT designations are preceded by a number giving the screen diagonal or diameter in cm (rounded-off to the nearest whole number):*'''ЛМ''' ⟼ '''LM''' – [[Radar display|Radar CRT]], [[flying-spot scanner]], ''[[Skiatron]]'', etc. with magnetic deflection:*'''ЛО''' ⟼ '''LO''' – CRT for oscilloscopes with [[electrostatic deflection]]*'''Т''' ⟼ '''T''' – [[Thyratron]]:*'''ТГ''', '''ТГИ''' ⟼ '''TG''', '''TGI''' – Gas-filled thyratron:*'''ТР''' ⟼ '''TR''' – Mercury-vapor thyratron*'''6218/E80T''' (CV5724) – Modulated, single-anode [[beam deflection tube]] for pulse generation up to 375 MHz, shock resistant up to 500 [[g-force|g]]<ref name="EIA6218">{{cite web |url=http://www.mif.pg.gda.pl/homepages/frank/sheets/201/6/6218.pdf |publisher=[[Rogers Vacuum Tube Company|Rogers Majestic Corp.]] |title=6218 data sheet, RTMA Engineering Dept. Release #1115 |date=25 August 1952 |access-date=1 May 2017}}</ref><ref name="E80T">{{cite web |url=http://www.mif.pg.gda.pl/homepages/frank/sheets/030/e/E80T.pdf |publisher=[[Philips]] |title=E80T data sheet |date=4 April 1956 |access-date=1 May 2017}}</ref><refname="Bruijsten_Groendijk_Mantz"> {{cite web |url=https://lampes-et-tubes.info/sp/Bruijsten_Groendijk_Mantz.pdf |last1=Bruijsten |first1=J. |last2=Groendijk |first2=H. |last3=Mantz |first3=M. R. |publisher=[[Philips]] |date=Nov-Dec 1952 |title=Philips Electronic Application Bulletin: ''Synchronization of a Variable Frequency Oscillator at Discrete, Stabilized Frequencies with the E80T'' |volume=13 |pages=58-64 |access-date=31 August 2019}}</ref><ref name="Kretzmann">{{cite web |url=https://lampes-et-tubes.info/sp/Kretzmann.pdf |last=Kretzmann |first=R. |publisher=[[Philips]] |title=Philips Technical Library: ''Pulse Delay Circuit using Deflection Tube E80T'' |pages=64-66 |access-date=31 August 2019}}</ref>*'''416B/6280''' – Planar SHF power triode, 500 mW output at 4 GHz*'''6МХ1Б''' ⟼ '''6MH1B''' – ''Mechanotron''-type<sup>([[:ru:Механотрон|ru]])</sup> mechano-electronic displacement [[sensor]]; a vacuum dual diode with one anode mounted on a shaft that extends through a thin, flexible metal diaphragm; shaft movement is reflected in the anode currents difference<ref>{{cite web |url=http://www.155la3.ru/datafiles/6mh1b.pdf |publisher=[[Moscow Electric Lamp Plant|МЭЛЗ/MELZ]] |title=''Механотрон Типа 6МХ1Б'' data sheet |language=ru |access-date=7 August 2019}} • [http://www.155la3.ru/datafiles/6mh1b_tu.pdf other]</ref>*'''6МХ1С''' ⟼ '''6MH1S''' – ''Mechanotron''-type displacement sensor; a vacuum dual diode with both anodes mounted on a shaft that extends through a diaphragm<ref>{{cite web |url=https://lampes-et-tubes.info/sp/6MH1S.pdf |publisher=[[Moscow Electric Lamp Plant|МЭЛЗ/MELZ]] |title=''Механотрон Типа 6МХ1С'' data sheet |language=ru |access-date=7 August 2019}} • [https://lampes-et-tubes.info/sp/sp149.php?l=e on lampes-et-tubes]</ref>*'''6МДХ4С''' ⟼ '''6MDH4S''' – ''Mechanotron''-type pressure sensor; a vacuum dual diode with one anode mounted on a [[Pressure measurement#Bellows|bellows chamber]] that expands or contracts depending on external pressure<ref>{{cite web |url=https://lampes-et-tubes.info/sp/6MDH4S.pdf |publisher=[[Moscow Electric Lamp Plant|МЭЛЗ/MELZ]] |title=''Механотрон Типа 6МДХ4С'' data sheet |language=ru |access-date=7 August 2019}} • [https://lampes-et-tubes.info/sp/sp175.php?l=e on lampes-et-tubes]</ref>*'''16ЛМ4Г''' ⟼ '''16LM4G''' – ''[[Skiatron]]'';<ref>{{cite web |url=https://lampes-et-tubes.info/cr/16LM4G.pdf |title=''16ЛМ4Г'' data sheet |language=ru |access-date=31 August 2019}} on [https://lampes-et-tubes.info/cr/cr148.php?l=e lampes-et-tubes.info]</ref> cf. 4AP10*'''ЛН22''' ⟼ '''LN22''' – [[Storage tube]];<ref>{{cite web |url=https://lampes-et-tubes.info/sc/LN22.pdf |title=''ЛН22'' data sheet |language=ru |access-date=31 August 2019}} on [https://lampes-et-tubes.info/sc/sc049.php?l=e lampes-et-tubes.info]</ref> cf. 6835, 7570, 7571The currents drawn by parallel-connected types, and the voltages across series-connected types, vary widely according to the tube's heating power requirements. Otherwise identical tubes were manufactured in several variants with different heater characteristics,<ref>{{cite web |url=http://www.mif.pg.gda.pl/homepages/frank/other/docs/Tomer_1960_Getting_the_Most_Out_of_Vacuum_Tubes.pdf |last=Tomer |first=Robert B. |publisher=Howard W. Sams Co., Indianapolis |year=1960 |title=Getting the Most out of Vacuum Tubes |lccn=60-13843 |access-date=10 Oct 2013}} - Chapter 6 discusses heater voltages as one of the many factors leading to proliferation of tube types.</ref> but usually the same heater power, e.g. 6.3 V/300 mA and 12.6 V/150 mA; some tubes feature a center-tapped filament/heater, allowing for two voltage/current options by series or parallel wiring of their two heater sections. See, for example, the [[#RCARC|{{color|Green|RCA Receiving Tube Manuals}}]].* The first character group is always a number, consisting of one to three numerals, and represents the heater voltage rounded to the nearest whole number; '''0''' indicates a [[Cold cathode#Cold-cathode devices|cold-cathode tube]]. Tubes with a center-tapped filament/heater are designated the higher voltage option. Exceptions include 2.0 Volt filament tubes (such as 1C7-G and 1F4) and series heater tubes where the rounding was less exact (such as the 5.9-Volt LCF200/5X9 and the 46-Volt 50Y7GT).<ref name="DecoderLinks" />:Heater ratings for series-string, AC/DC tubes are given in milliamperes; heater ratings for parallel-string tubes are given in volts. Tubes with a center-tapped filament/heater are designated the lower voltage option:*'''G''' – Various heaters between 2.5 and 5.0 V AC (except 4 V) from a separate heater winding on a mains or horizontal-output transformer for the anode voltage rectifier*'''MX40''' – Heptode [[pentagrid converter]] with a 4 V/1 A heater and a British 7-pin base with #4 grid on top cap; similar to the FC4 octode*'''X41''' – Triode/hexode mixer up to 60 MHz, designed as a [[drop-in replacement]] for the MX40 [[pentagrid converter]]:*'''X41c''' – X41 with a ceramic base for better frequency stability in [[Band I|VHF Band I]] TV tuners*'''FC4''' – [[Pentagrid converter|Octode '''F'''requency '''C'''onverter]] with a '''4''' V/650 mA heater and a British 7-pin base with #4 grid on top cap; similar to the MX40 heptode<ref>FC4 on [http://www.r-type.org/exhib/aad0212.htm r-type.org]</ref>*'''ЕГ''', '''ОГ''' ⟼ '''YeG''', '''OG''' – [[Dekatron]]:*'''ЛФ''' ⟼ '''LF''' – Analog [[function generator]]*'''Н''' ⟼ '''N''' – ''[[Nuvistor]]''*'''ЭПЛ''' ⟼ '''EPL''' – Semiconductor/tube hybrid ({{lang-ru|'''Э'''лектронно-'''п'''олупроводниковая '''л'''ампа}})*'''6ES6/EF97''' (remote-cutoff), '''6ET6/EF98''' (sharp-cutoff) – Low (6.3-50 V) anode voltage RF pentodes, used in car radios*'''7610''' – ''Electron bombarded semiconductor tube'' for high-speed, 8-bit [[Analog-to-digital converter|A/D conversion]]; a [[beam deflection tube]] where the analog signal to be digitized deflects a sheet beam across an array of 8 long [[p–n diode|semiconductor diodes]] that is covered by a metal layer with windows patterned to encode the [[Gray code]]. The 8 diodes are reverse-biased and when hit through a window by the electron beam, generate currents that digitally represent the analog signal;<ref>{{cite web |url=https://lampes-et-tubes.info/sc/7612D-ADC.pdf |title= ''7612D – Electron bombarded semiconductor tube for high-speed analog-digital conversion'' |publisher=[[Tektronix]] |access-date=10 July 2019}} on [https://lampes-et-tubes.info/sc/sc023.php?l=e lampes-et-tubes.info]</ref> cf. ЭПЛ-1*'''8203''' – ''Nuvistor'' power triode up to 250 MHz*'''8380''' – ''Nuvistor'' power tetrode for use in [[sonobuoy]]s, up to 80 MHz*'''8382''' – ''Nuvistor'' power triode for use in sonobuoys, up to 175 MHz*'''8441''' – ''Nuvistor'' high-mu triode for use in sonobuoys*'''8456''' – ''Nuvistor'' medium-mu triode for use in sonobuoys*'''8525''', '''8526''', '''8527''' – ''Nuvistor'' medium-mu dual triode*'''8627''' – ''Nuvistor'' power triode up to 1.2 GHz*'''8628''' – ''Nuvistor'' high-mu AF triode for use in [[valve microphone]]s and piezoelectric pickup preamplifiers up to 200 kHz*'''8808''' – ''Nuvistor'' high-mu triode up to 1.2 GHz*'''AC104''' – Triode<ref>[https://www.radiomuseum.org/tubes/tube_ac104.html AC104 on radiomuseum.org]</ref>*'''AL60''' – Power pentode<ref>AL60 on [https://www.radiomuseum.org/tubes/tube_al60.html radiomuseum.org], [http://www.r-type.org/exhib/aaq0073.htm r-type.org]</ref>*'''DAC1''' – AM detector diode + AF triode<ref>DAC1 on [https://www.radiomuseum.org/tubes/tube_dac1.html radiomuseum.org], [http://www.r-type.org/exhib/aaa1615.htm r-type.org]</ref>*'''DAF1''' – AM detector diode + AF pentode<ref>[https://www.radiomuseum.org/tubes/tube_daf1.html DAF1 on radiomuseum.org]</ref>*'''DBC31''' – Dual diode + triode<ref>[https://www.radiomuseum.org/tubes/tube_dbc31.html DBC31 on radiomuseum.org]</ref>*'''DC51''' – Triode<ref>[https://www.radiomuseum.org/tubes/tube_dc51.html DC51 on radiomuseum.org]</ref>*'''DCH1''' – Triode/hexode mixer<ref>[https://www.radiomuseum.org/tubes/tube_dch1.html DCH1 on radiomuseum.org]</ref>*'''DCH31''' – Triode/hexode mixer<ref>[https://www.radiomuseum.org/tubes/tube_dch31.html DCH31 on radiomuseum.org]</ref>*'''DF1''' – RF/IF pentode<ref>DF1 on [https://www.radiomuseum.org/tubes/tube_df1.html radiomuseum.org], [http://www.r-type.org/exhib/aag0087.htm r-type.org]</ref>*'''DF31''' – Sharp-cutoff RF/IF/AF pentode<ref>[https://www.radiomuseum.org/tubes/tube_df31.html DF31 on radiomuseum.org]</ref>*'''DF32''' – Sharp-cutoff RF/IF/AF pentode<ref>[https://www.radiomuseum.org/tubes/tube_df32.html DF32 on radiomuseum.org]</ref>*'''DF650''' – Subminiature AF pentode, all-glass elliptical cross-section envelope with 5 inline wire-ends, long pigtails, for use in hearing aids<ref>[https://www.radiomuseum.org/tubes/tube_df650.html DF650 on radiomuseum.org]</ref>===='''DFF'''====*'''DFF50''' – Dual pentode<ref>[https://www.radiomuseum.org/tubes/tube_dff50.html DFF50 on radiomuseum.org]</ref>*'''DFF51''' – Dual pentode<ref>[https://www.radiomuseum.org/tubes/tube_dff51.html DFF51 on radiomuseum.org]</ref>*'''DFF101''' – Dual pentode<ref>[https://www.radiomuseum.org/tubes/tube_dff101.html DFF101 on radiomuseum.org]</ref>*'''DK1''' – Octode pentagrid converter<ref>[https://www.radiomuseum.org/tubes/tube_dk1.html DK1 on radiomuseum.org]</ref>*'''DK22''' – Octode pentagrid converter<ref>[https://www.radiomuseum.org/tubes/tube_dk22.html DK22 on radiomuseum.org]</ref>*'''DK31''' – Octode pentagrid converter<ref>[https://www.radiomuseum.org/tubes/tube_dk31.html DK31 on radiomuseum.org]</ref>*'''DL2''' – Power pentode<ref>DL2 on [https://www.radiomuseum.org/tubes/tube_dl2.html radiomuseum.org], [http://www.r-type.org/exhib/aaj0207.htm r-type.org]</ref>*'''DL22''' – Power pentode<ref>[https://www.radiomuseum.org/tubes/tube_dl22.html DL22 on radiomuseum.org]</ref>*'''DL29/3D6''' – Power pentode with a center-tapped, 2.8/1.4 V filament*'''DL31''' – Power pentode<ref>[https://www.radiomuseum.org/tubes/tube_dl31.html DL31 on radiomuseum.org]</ref>*'''DL35''' – 400 mW Power pentode with a center-tapped, 2.8/1.4 V filament*'''DL36''' – Power pentode<ref>[https://www.radiomuseum.org/tubes/tube_dl36.html DL36 on radiomuseum.org]</ref>*'''DL75''' – Subminiature AF power pentode, all-glass round cross-section envelope, circular 8-pin/pigtails base<ref>DL75 on [https://www.radiomuseum.org/tubes/tube_dl75.html radiomuseum.org], [http://www.r-type.org/exhib/zaa0120.htm r-type.org]</ref>*'''EBF1''' (6B7) – Common cathode dual diode + remote-cutoff RF/IF/AF pentode<ref>[https://www.radiomuseum.org/tubes/tube_ebf1.html EBF1 on radiomuseum.org]</ref>*'''EBF21''' – Common cathode dual diode + remote-cutoff RF/IF/AF pentode<ref>[https://www.radiomuseum.org/tubes/tube_ebf21.html EBF21 on radiomuseum.org]</ref>*'''EBF175''' – Common cathode dual diode + remote-cutoff RF/IF/AF pentode<ref>[https://www.radiomuseum.org/tubes/tube_ebf175.html EBF175 on radiomuseum.org]</ref>*'''EC21''' – Triode<ref>[https://www.radiomuseum.org/tubes/tube_ec21.html EC21 on radiomuseum.org]</ref>*'''EC31''' – Triode<ref>EC31 on [https://www.radiomuseum.org/tubes/tube_ec31.html radiomuseum.org], [http://www.r-type.org/exhib/aaa0776.htm r-type.org]</ref>*'''EC54''' – Triode<ref>[https://www.radiomuseum.org/tubes/tube_ec54.html EC54 on radiomuseum.org]</ref>*'''EC93''' – UHF Medium-mu oscillator triode<ref>[https://www.radiomuseum.org/tubes/tube_ec93.html EC93 on radiomuseum.org]</ref>*'''EC903''' – RF/IF Triode<ref>EC903 on [https://www.radiomuseum.org/tubes/tube_ec903.html radiomuseum.org], [http://www.r-type.org/exhib/aaa0972.htm r.org]</ref>*'''ECC31''' – Common cathode dual AF power triode, octal base<ref>ECC31 on [https://www.radiomuseum.org/tubes/tube_ecc31.html radiomuseum.org], [http://www.r-type.org/exhib/aaa1556.htm r.org]</ref>*'''ECC804/6GA8''' – Separate cathodes, dual triode<ref>[https://www.radiomuseum.org/tubes/tube_ecc804.html ECC804 on radiomuseum.org]</ref>*'''EF21''' – Pentode<ref>[https://www.radiomuseum.org/tubes/tube_ef21.html EF21 on radiomuseum.org]</ref>*'''EF812''' – RF/IF Pentode<ref>[https://www.radiomuseum.org/tubes/tube_ef812.html EF812 on radiomuseum.org]</ref>*'''EF814''' – RF/IF Pentode<ref>[https://www.radiomuseum.org/tubes/tube_ef814.html EF814 on radiomuseum.org]</ref>*'''EFF50''' – Dual VHF pentode<ref>[https://www.radiomuseum.org/tubes/tube_eff50.html EFF50 on radiomuseum.org]</ref>*'''EL20''' – Power pentode<ref>[https://www.radiomuseum.org/tubes/tube_el20.html EL20 on radiomuseum.org]</ref>*'''EL22''' – Power pentode<ref>EL22 on [https://www.radiomuseum.org/tubes/tube_el22.html radiomuseum.org], [http://www.r-type.org/exhib/zaa0133.htm r-type.org]</ref>*'''EL30''' – Power pentode<ref>[https://www.radiomuseum.org/tubes/tube_el30.html EL30 on radiomuseum.org]</ref>*'''EL39''' – Power pentode<ref>[https://www.radiomuseum.org/tubes/tube_el39.html EL39 on radiomuseum.org]</ref>*'''EL43''' – Power pentode<ref>[https://www.radiomuseum.org/tubes/tube_el43.html EL43 on radiomuseum.org]</ref>*'''EL53''' – Power pentode<ref>[https://www.radiomuseum.org/tubes/tube_el53.html EL53 on radiomuseum.org]</ref>*'''EL54''' – Power pentode<ref>[https://www.radiomuseum.org/tubes/tube_el54.html EL54 on radiomuseum.org]</ref>*'''EL70''' – Subminiature power pentode, round cross-section envelope, circular 8-pin/pigtails base*'''EL820''' – Power pentode<ref>[https://www.radiomuseum.org/tubes/tube_el820.html EL820 on radiomuseum.org]</ref>*'''EM3''' – Top-view, "Magic Eye"-type tuning indicator<ref>[https://www.radiomuseum.org/tubes/tube_em3.html EM3 on radiomuseum.org]</ref>*'''EM31''' – Top-view, "Magic Eye"-type tuning indicator<ref>[https://www.radiomuseum.org/tubes/tube_em31.html EM31 on radiomuseum.org]</ref>{{anchor|EY_SQ}}—''[[#MP_SQ|{{color|Green|Special quality}}]]'':*'''EZ900/6063''' – Full-wave rectifier<ref>[https://www.radiomuseum.org/tubes/tube_ez900.html EZ900 on radiomuseum.org]</ref>*'''GY11''' – Half-wave rectifier, 2.5 V/5 A heater, anode on top cap*'''GY86''' – Half-indirectly heated Half-wave, [[Cathode ray tube|CRT]] [[High voltage|EHT]] rectifier, 2.6 V/300 mA heater, anode on top cap, identical to [[#DY86|{{color|Green|DY86}}]] and EY86 except for heater ratings*'''GY501/3BH2''' – Half-indirectly heated CRT EHT rectifier for color TV, 3.15 V/400 mA heater, anode on top cap*'''GY802''' – Half-indirectly heated CRT EHT rectifier, 2.6 V/310 mA heater, anode on top cap, identical to [[#DY802|{{color|Green|DY802/1BQ2}}]] and EY802 except for heater ratingsThese tubes all have a 5.0 V heater*'''KK1''' – Octode pentagrid converter<ref>[https://www.radiomuseum.org/tubes/tube_kk1.html KK1 on radiomuseum.org]</ref>*'''KLL3''' – Dual power pentode<ref>[https://www.radiomuseum.org/tubes/tube_kll3.html KLL3 on radiomuseum.org]</ref>*'''PCL88''' = '''30PL14''' (EdiSwan) – Triode - power pentode<ref>[https://www.radiomuseum.org/tubes/tube_pcl88.html PCL88 on radiomuseum.org]</ref>*'''PCL800''' = '''30PL13''' (EdiSwan) – Triode - power pentode<ref>PCL800 on [https://www.radiomuseum.org/tubes/tube_pcl800.html radiomuseum.org], [http://www.r-type.org/exhib/aad0301.htm r-type.org]</ref>*'''PY801''' – TV horizontal output booster diode<ref>[https://www.radiomuseum.org/tubes/tube_py801.html PY801 on radiomuseum.org]</ref>*'''UL46''' – Power pentode<ref>UL46 on [https://www.radiomuseum.org/tubes/tube_ul46.html radiomuseum.org], [http://www.r-type.org/exhib/aaa0376.htm r-type.org]</ref>*'''6С51Н''', '''6С52Н''' ⟼ '''6S51N''', '''6S52N''' – ''[[Nuvistor]]'' triodes*'''Н-53''', '''Н-58''' ⟼ '''N-53''', '''N-58''' – ''[[Nuvistor]]'' triodes*'''Н-55''' ⟼ '''N-55''' – ''Nuvistor'' pentode*'''Н-59''' = '''6Э13Н''', '''Н-60''' = '''6Э14Н''' ⟼ '''N-59''' = '''6E13N''', '''N-60''' = '''6E14N''' – ''Nuvistor'' tetrodes*'''ЛП-5''' ⟼ '''LP-5''' – Binary trochotron, 26-pin ''Acorn''-type all-glass pigtaled<ref>{{cite web |url=https://lampes-et-tubes.info/sp/LP-5.pdf |publisher=[[Moscow Electric Lamp Plant|МЭЛЗ/MELZ]] |title=''Бинарный Трохотрон Типа ЛП-5'' data sheet |language=ru |access-date=10 July 2019}} on [https://lampes-et-tubes.info/sp/cd156.php?l=e lampes-et-tubes.info]</ref>*'''ЛП-6''' ⟼ '''LP-6''' – Circular trochotron, 26-pin ''Acorn''-type all-glass pigtaled<ref>{{cite web |url=http://www.155la3.ru/datafiles/lp6_pasp.pdf |publisher=[[Moscow Electric Lamp Plant|МЭЛЗ/MELZ]] |title=''Кольцевой Трохотрон Типа ЛП-4'' data sheet |language=ru |access-date=10 July 2019}}</ref>*'''ЛФ-2''' ⟼ '''LF-2''' – [[Beam deflection tube|Beam deflection]] [[Function generator#Circuit elements|function generator]] tube for use in [[analog computer]]s to calculate {{math|''z'' {{=}} {{sfrac|''x''/''y''|''x''+''y''}}}};<ref>{{cite web |url=https://lampes-et-tubes.info/sc/LF2.pdf |title=ЛФ-2 data sheet |language=ru |access-date=10 July 2019}} on [https://lampes-et-tubes.info/sc/sc021.php?l=e lampes-et-tubes.info]</ref> cf. QK329*'''ЛФ-7''' ⟼ '''LF-7''' – Beam deflection function generator tube for use in analog computers<ref>{{cite web |url=https://lampes-et-tubes.info/sc/LF-7.pdf |title=ЛФ-7 data sheet |language=ru |access-date=10 July 2019}} on [https://lampes-et-tubes.info/sc/sc045.php?l=e lampes-et-tubes.info]</ref>*'''ЛФ-9П''' ⟼ '''LF-9P''' – ''Polytron'', a beam deflection function generator tube for use in analog computers<ref>{{cite web |url=https://lampes-et-tubes.info/sc/LF-9P.pdf |title=ЭЛЕКТРОННОЛУЧЕВОЙ ПРИБОВ ЛФ-9П data sheet |language=ru |access-date=10 July 2019}} on [https://lampes-et-tubes.info/sc/sc046.php?l=e lampes-et-tubes.info]</ref> to integrate up to 10<sup>th</sup> order [[differential equation]]s*'''ЭПЛ-1''' ⟼ '''EPL-1''' – ''Electron bombarded semiconductor tube'', a tube where the anode is replaced by a [[p–n diode|semiconductor diode]] that is reverse-biased and when hit by the electron beam, generates a current;<ref>{{cite web |url=http://www.155la3.ru/datafiles/epl1_tu_1978.pdf |title=''Электронно-полупроводниковая лампа ЭПЛ-1'' data sheet |language=ru |access-date=10 July 2019}}</ref> cf. 7610These tubes were made for [[Vacuum tube battery|home storage battery]] receivers manufactured during the early to mid-1930s; all have 2.0 volt DC filaments despite the 1-prefix, intended to distinguish them from the 2.5 volt AC heated tubes listed belowSome 6-prefix tubes were also available as 2-prefix, for television receivers with series heater strings [[#450mA series heater tubes|{{color|Green|(see below)}}]]Many 6-prefix tubes were also available as 3-prefix with a 3.15 V heater with twice the heater current, for television receivers with series heater strings [[#450mA series heater tubes|{{color|Green|(see below)}}]]==='''4''' volt heater/filament tubes===Some 6-prefix tubes were also available as 4-prefix with a 4.2 V heater with 1.5 times the heater current, for television receivers with series heater strings [[#450mA series heater tubes|{{color|Green|(see below)}}]];4 volt DC filament tubes*'''4A6G ''' – Dual power triode, octal base, directly heated with a center-tapped 4.0 V filament, so it can also be wired for 2 VSome 6-prefix tubes were also available as 5-prefix, for television receivers with series heater strings [[#450mA series heater tubes|{{color|Green|(see below)}}]];Rectifiers===Other tubes with nonstandard filament voltages===, split this section into heater current sections, added some heater currents*'''6BK4''' – High voltage beam triode, U<sub>a</sub>=27 kV, I<sub>a</sub>=1.5 mA, P<sub>a</sub>=25 W, U<sub>h-c</sub>=-200 V, used as shunt regulator in color TV receivers and in measurement equipment such as high voltage meters:*'''6BK4A''' – 6BK4 with P<sub>a</sub>=30 W:*'''6BK4B''' – 6BK4A with P<sub>a</sub>=40 W, U<sub>h-c</sub>=-450 V:*'''6BK4C/6EL4A''' – 6BK4B retrofitted with an internal X-radiation shielding, introduced after the [[X-ray tube#Hazards of X-ray production from vacuum tubes|1967 General Electric X-radiation scandal]]<ref name="GEXray" />These tubes all have 12.6 V heaters despite the 14-prefix, intended to indicate a Loctal base. Most draw 150 mA for use in [[All American Five|AA5 radio receivers]];For [[All American Five|AA5 radio receivers]] with 150 mA series heater strings*'''25F5''' – Beam power pentode; 50C5 with half the heater power, allowing for push-pull output stages with the heater spec of a single 50C5;For AA5 radio receivers with 300 mA series heater stringsUsed in ''Three-way portable'' (AC or DC mains, or batteries) radio receivers===100 mA series heater tubes===*'''18FX6''', '''18FX6A''' – [[Pentagrid converter]], 6BE6/EK90 and 12BE6 with a 18 V heater*'''18FY6''', '''18FY6A''' – Dual diode + triode; 6AV6/EBC91 and 12AV6 with a 18 V heater*'''34GD5''', '''34GD5A''' – Beam power tube; 35C5 and 50C5 with a 34 V heater*'''36AM3''' – Half-wave rectifier; 35W4 with a 36 V heater*'''60FX5''' – AF power pentode; 12FX5 and 19FX5 with a 60 V heater===150 mA series heater tubes===Used in [[All American Five|AA5 radios]], and semi-[[Wiktionary:transistorized|transistorized]] TV receivers with [[#Heater or filament ratings|{{color|Green|series heater strings}}]]*'''56R9''' – ''[[Compactron]]'' AF triode + beam power pentode, separate heaters for triode (14 V) and pentode (42 V) for flexibility with the series string order*'''70A7-GT''' (With heater tap for a pilot lamp), '''70L7-GT''' – Half-wave rectifier + beam power pentode, 70 V heater, Octal base===300 mA series heater tubes======450 mA series heater tubes======600 mA series heater tubes===Most are series heater versions of respective 6-prefix tubes; used in TV receivers with [[#Heater or filament ratings|{{color|Green|series heater strings}}]]===Other tubes===*'''13CW4''' – ''[[Nuvistor]]'' High-mu VHF triode (13.5 V/60 mA heater version of the '''6CW4''') for use as a low-noise front end in standalone, semi-[[Wiktionary:transistorized|transistorized]] [[Antenna amplifier|antenna boosters]]; later also used as a [[microphone preamplifier|preamplifier]] in [[Georg Neumann|Neumann]] [[Valve microphone|condenser microphones]] [[U 47|''U-47'' and ''U-48'']] after the production of the [[#VF|{{color|Green|VF14M}}]] ceased*'''{{Visible anchor|DY86}}/1S2''' – Half-indirectly heated 18 kV CRT EHT rectifier, noval base, filament internally connected to cathode. Identical to EY86 and GY86 except for heater ratings*'''{{Visible anchor|DY802}}/1BQ2''' – Half-indirectly heated 23 kV CRT EHT rectifier, noval base, filament internally connected to cathode, identical to EY802 and GY802 except for heater ratings*'''ECF12''' – Triode - Pentode, UCF12 with a different heater*'''GZ40''' – Full-wave rectifier, EZ40 with a different heater*'''UCF12''' – Triode - pentode, ECF12 with a different heater*'''XC95/2ER5''' – [[Control grid#Grid variations|Variable-mu]] VHF triode, identical to EC95/6ER5, PC95/4ER5 except for heater ratings*'''4AP10 ''' – 4" (10 cm) ''[[Direct-view bistable storage tube|Skiatron]]'', a CRT where the conventional light-emitting [[phosphor]] layer is replaced with a ''[[scotophor]]'' such as [[potassium chloride]], which has the property that when a crystal is struck by an electron beam, it would change from translucent white to a dark magenta, and when flooded with high-intensity [[infrared]], or by electro-thermal heating, would change back to translucent white. It therefore needs [[backlight]]ing or external illumination like today's [[electronic paper]]<ref>{{cite web |url=http://www.mif.pg.gda.pl/homepages/frank/sheets/201/4/4AP10.pdf |publisher=[[RCA]] |title=''4AP10 Skiatron'' data sheet |date=3 November 1944 |access-date=6 June 2019}}</ref>*'''ZA1''' (4 V heater), '''ZA2''' (6.3 V heater) – ''Acorn'' sharp-cutoff pentodess"'''''Bri'''tish '''M'''anufactured '''A'''merican '''R'''adio''" (tubes) used all American designations; [[Standard Telephones and Cables|STC]] used the following system:===Other tubes with nonstandard filament voltages======'''0''' prefix - gas-filled [[cold cathode]] tubes=======[[Voltage-regulator tube|Voltage stabilisers and references]]====:*'''Miniature 7-pin-based regulators:''' Letter order (A-B-C) indicates decreasing voltage; cathode on pins 2, 4, 7; anode on pins 1, 5:*'''Octal-based regulators:''' Letter order (A-B-C) indicates increasing voltage; cathode on pin 2; anode on pin 5; jumper between pins 3 and 7 to unpower the device when the regulator is pulled from its socket*'''0A2/150C2''' – 150 volt regulator, Miniature 7-pin base*'''0B2/108C1''' (6627) – 105 volt regulator, Miniature 7-pin base*'''0E3/85A1''' – 85 volt regulator, 3-pin base*'''0G3/85A2''' – 85 volt regulator, Miniature 7-pin base====Trigger tubes====*'''0A5''' – 1 kV, 10 A<sub>peak</sub> Gas triode designed for relay drive and general switching====Rectifiers====*'''0Z3''' – 30 ≤ I ≤ 75 mA Full-wave gas rectifier, 5-pin base. Used in [[vibrator (electronic)|vibrator]] power supplies in early car radios==='''1''' prefix - 1 volt filament/heater tubes=======1.25 volt DC filament subminiature tubes====More of these tubes are listed as equivalents under M-P ''[[#D - 1.4 V filament/heater|{{color|Green|'''D''' - 1.4 V filament/heater}}]]''====1.4 volt DC filament/heater tubes====More of these tubes are listed as equivalents under M-P ''[[#D - 1.4 V filament/heater|{{color|Green|'''D''' - 1.4 V filament/heater}}]]''====2 volt DC filament tubes======='''2''' volt heater/filament tubes=======CRT anode rectifiers====:*'''2X2''' (879) – [[Cathode ray tube|CRT]] [[High voltage|EHT]] rectifier; similar to 1B3 and 1S2 except for heater ratings
::*'''2X2A''' – 2X2, shock resistant up to 250 [[g-force|g]]
===3 volt heater/filament tubes=======2.8 volt DC filament tubes====*'''3A5''' – Dual RF power triode, Miniature 7-pin base*'''3A8GT''' – Diode, triode + pentode with internal shield connected to filament center-tap, octal base*'''3E6''' – Sharp-cutoff pentode with internal shield connected to filament center-tap, Loctal base====CRT anode rectifiers====*'''6GS8''' – See [[#6BU8|{{color|Green|6BU8}}]]
*'''7X6''' – Dual rectifier with separate cathodes for use as a [[voltage doubler]]*'''7Y4''' – Full-wave rectifier*'''7Z4''' – Full-wave rectifier*'''14Y4''' – Full-wave rectifier*'''25Z5''' – Dual rectifier with separate cathodes for use as a [[voltage doubler]]*'''35W4''' – Half-wave rectifier*'''35Y4''' – Half-wave rectifier with a heater tap for a pilot lamp, Loctal base; similar to 35Z5*'''35Z3''' – Half-wave rectifier, Loctal base; similar to 35Z4*'''35Z4-GT''' – Half-wave rectifier*'''50DC4''' – Half-wave rectifier, 35W4 with a 50 volt heater*'''50X6''' – Dual rectifier with separate cathodes for use as a [[voltage doubler]] (Loctal)*'''117L7GT''' – Half-wave rectifier + beam power pentode*'''117M7GT''' – Half-wave rectifier + beam power pentode*'''117N7GT''' – Half-wave rectifier + beam power pentode*'''117P7GT''' – Half-wave rectifier + beam power pentode*'''117Z3''' – Half-wave rectifier, Miniature 7-pin version of 117Z4GT*'''117Z4GT''' – Half-wave rectifier*'''117Z6GT''' – Dual rectifier with separate cathodes for use as a [[voltage doubler]]; some versions have a center-tapped heater that can also be wired for 150 mA/58.5 V*'''38HE7''', '''38HK7''' – ''Compactron'' High-perveance damper diode + horizontal deflection beam power pentode*'''2EG4''' – ''Nuvistor'' high-mu VHF triode, 1.7 volt/600 mA heater*Ultron (MBLE)<sup>([[:fr:MBLE|fr]], [[:nl:Manufacture Belge de Lampes Electriques|nl]])</sup> preceded the M-P designation with the letter '''U''', as in UAD1 for AD1*Gas-filled [[cold cathode]] tubes were shifted to Z before their mass production in Europe started, but before that, most producers published [[#0 prefix - gas-filled cold cathode tubes|{{color|Green|RETMA '''0'''-prefix tube}}]] data appearantly under this letter: OA2, OA3, OB2, OB3, OC2, OC3, OD3, etc.*'''YJ1420''' – 900 W Magnetron for use in domestic [[microwave oven]]s between [[ISM radio band|2.43 and 2.47 GHz]]
*'''YK1220''' – Water-cooled 15 kW UHF Klystron for use in TV transmitters between 470 and 860 MHz
*'''YK1230''' – Water-cooled 25 kW UHF Klystron for use in TV transmitters between 470 and 860 MHz
# Battery types, ubiquitous before the 1930s but since then only for mobile/portable equipment with a low-power filament operated usually from 1 to 2 V; all filaments in a design are rated at the same voltage and are connected in parallel. They are usually directly heated to save heating power (therefore requiring a [[Direct current|DC]] current), except if the (due to the voltage [[gradient]] along the filament) poorly defined cathode potential impedes the function of the device, as is the case e.g. with AM [[Detector (radio)|detector]] diodes with filament voltages of 1.9 V or more; in such cases, indirect heaters were employed and marketed as ''[[equipotential]]'' or ''unipotential cathode'' at the time.*'''EAM86/6GX8''' – Diode + side-view, horizontal band-type [[Magic eye tube|tuning/level indicator]] - the diode is to rectify the audio signal when indicating a recording level or a [[Modulation index|modulation depth]]*'''EFM1''' – [[Control grid#Grid variations|Variable-mu]] AF pentode + top-view, "Magic Eye"-type [[Magic eye tube|tuning indicator]], beam control rods internally tied to the floating screen grid on a weak pullup resistor so its voltage mirrors the [[Automatic gain control#AM radio receivers|gain-control voltage]] fed to the control grid together with the audio signal to be amplified*'''EFM11''' – Variable-mu AF pentode + top-view, "Magic Eye"-type tuning indicator, beam control rods internally tied to the floating screen grid:*'''EM84a''' – Improved EM84 with twice the sensitivity<ref>{{cite web |url=https://www.jogis-roehrenbude.de/Roehren-Geschichtliches/Mag_Augen/Baender/EM84a.pdf |title= EM84a Data sheet |publisher=[[C. Lorenz AG|Lorenz]] |language=de |access-date=9 April 2019}}</ref>:*'''EM85E''' – Band-type [[drop-in replacement]] for EM85<ref>{{cite web |url=https://www.jogis-roehrenbude.de/Roehren-Geschichtliches/Mag_Augen/Baender/EM85E.htm |title= EM85E on Jogis-Roehrenbude.de |language=de |access-date=9 April 2019}}</ref>*'''ZT1000/8270''' – 21 kV, 10 A [[Thyratron|Mercury-vapor triode thyratron]]*'''EBC81/6BD7A''' – Shielded low-power dual diode + triode, UBC81 with a different heater, EBC41 with a different basing*'''EL511''' – CRT horizontal deflection output power pentode*'''EL519''' – CRT horizontal deflection output power pentode, PL519 with a different heater*'''UBC81''' – Shielded dual diode - AF triode, EBC81/6BD7A with a different heater, UBC41 with a different basing*'''ZM1250''' – Planar, Neon-filled, one-character alphanumeric 5×7 dot-matrix display with a left decimal point, 9.8mmCH, all 36 cathodes directly accessibleUsed in 1920s home radios powered by 3.3 Volts DC filament for 3 dry cells with a [[rheostat]] (filaments) and storage batteries (B-plus voltage).*'''PX25''' – Directly heated AF power triode designed in the 1930s. Capable of providing about 25 W of audio.*'''6N6''' – ''[[Triple-twin|Triple-Twin]]'' 4-Watts AF signal + power triode, internally connected as a cathode follower like today's [[Darlington transistor]]s*'''EL505/6KG6''' – CRT horizontal deflection output power pentode for color TV, PL505/40KG6 with a different heater*'''LC900/3HA5''' – VHF triode, identical to EC900/6HA5 and PC900/4HA5 except for heater ratings====With a 4 Volts DC filament====*'''[[Loewe 3NF|3NF]]''' – Tube-based "integrated circuit" with 3 triodes and passive components (audion, AF preamp and power amp) in the same envelope, 4 V/350 mA heater<ref name="LoeweShortForm">[[Loewe (electronics)|Loewe]] [https://lampes-et-tubes.info/rt/LOEWE.pdf short form data listing]</ref> [[File:Commons-logo.svg|16x16px|link=:Commons:Category:3NF|class=noviewer|alt=]]====With a 4V heater====Powered by an AC transformer or a 2-cell [[lead-acid battery]]*'''2HF''' – Tube-based "integrated circuit" with 2 tetrodes and passive components (2-stage RF preamp) in the same envelope<ref name="LoeweShortForm" />*'''2HMD''' – Same with 2 pentodes and passive components (mixer and oscillator), 4 V/1.5 A heater*'''2NF''' – Same with 2 triodes and passive components (AF preamp and power amp), 4 V/600 mA heater*'''3NFW''', '''3NFK''', '''3NFL''' – Same with 4 V/1 A indirect heater (audion, AF preamp and power amp)*'''3NFBat''', '''3NFNet''' – Same with 4 V/125 mA indirect heater (audion, AF preamp and power amp)*'''EN92''' (5696) – 25 mA<sub>avg</sub>, 100 mA<sub>peak</sub>, 2 A<sub>surge</sub>, Gas-filled, indirectly heated tetrode thyratron, negative starter voltage, Miniature 7-pin base, for industrial control*'''HA1''' (4 V heater), '''HA2''' (6.3 V heater) – ''[[Acorn tube|Acorn]]'' UHF triodes up to 600 MHz*'''H12''' – Miniature AF triode for use in hearing aids*'''L12''' – Miniature AF power triode for use in hearing aids=={{anchor|O1915}}List of tubes used in 1910s radio receivers==*'''13П1С, 13П1П''' ⟼ '''13P1S, 13P1P''' – Low (26-110 V) anode voltage audio beam-power tetrode, for use in vehicle equipment#* A notable precursor was 1920's European {{Visible anchor|180mADC}} standard used in municipalities with a then-still commonplace DC mains system, which ruled out not only mains transformers, but also polarized [[Electrolytic capacitor|(electrolytic) capacitors]], as the sets had to tolerate accidental reverse-polarity feeding, making it notoriously difficult to filter out [[dynamo]] or [[Rectifier#Rectifier output smoothing|rectifier]] howl.<ref>{{cite web |url=http://www.radiomuseum.org/forumdata/users/133/ETZ_12_1938_NF_RF_Stoerungen_Gleichrichterspeisung.pdf |title=Zur Frage niederfrequenter Rundfunkstörungen bei Gleichrichterspeisung (On the question of audio frequency interference from a rectifier-based DC mains) |first=Rudolf |last=Moebes |language=de |date=24 March 1938 |publisher=[[:de:Elektrotechnischer Verein|Elektrotechnische Zeitschrift]] |access-date=1 May 2017}}</ref> Compatible product lines include the [[#Mullard designations before 1934|{{color|Green|Mullard x20 series}}]],<ref name="Mullard_MVG_1935" />{{rp|19}} the [[#Mullard–Philips system|{{color|Green|Mullard–Philips}}]] [[#B - 180 mA heater|{{color|Green|B-series}}]], the [[#Philips system before 1934|{{color|Green|Philips B20xx series}}]],<ref name="PhilipsMiniwatt1938" />{{rp|7}} the Telefunken REN(S)18xx series,<ref>Data sheets of [http://www.4tubes.com/1-DATASHEETS/SCANS-Original/R/REN1814_TFK-Nr1_Datasheet.pdf REN1814], [http://www.4tubes.com/1-DATASHEETS/SCANS-Original/R/RENS1820_TFK-Nr1_Datasheet.pdf RENS1820], [http://www.4tubes.com/1-DATASHEETS/SCANS-Original/R/REN1822_TFK_Datasheet.pdf REN1822], [http://www.4tubes.com/1-DATASHEETS/SCANS-Original/R/RENS1884_TFK-Nr1_Datasheet.pdf RENS1884] • Rectifierless [[Tuned radio frequency receiver|TRF]] receiver circuit examples: [http://www.radiomuseum.org/forumdata/users/3741/Seibt_331gi_schema_4_600.png ''331gi''], [http://85.144.192.2/nvhr/Lorenz_K33G.pdf ''K33G''] = [https://www.radiomuseum.org/forumdata/upload/tefag_k133g_schaltplan.png K133G], [http://85.144.192.2/nvhr/Volksontvanger_VE301G.pdf VE301G]</ref> some [[#With an AC/DC series heater|{{color|Green|Loewe WG3x "integrated circuit" tubes}}]], the [[#Tungsram system before 1934|{{color|Green|Tungsram x18 series}}]],<ref name="Tungsram_Lampes" />{{rp|10}} and the [[#Valvo system before 1934|{{color|Green|Valvo x18 series}}]]. Most of these tubes had 20- or 21-volts heaters; suitable barretters were available.<ref>[https://lampes-et-tubes.info/rl/rl031.php OSRAM 80-240V 0,18A vst dUZ] on lampes-et-tubes</ref>====With a 2.5V heater========With a 6.3V heater========With an AC/DC series heater====*'''MO44''' – Tube-based "integrated circuit" with 2 tetrodes and a capacitor (mixer and oscillator), 35 V/[[#180mADC|{{color|Green|180 mA series heater}}]]<ref name="LoeweShortForm" />*'''WG33''' – Same with 2 triodes, 1 power tetrode and passive components (audion, AF preamp and power amp) in the same envelope, 50 V/180 mA series heater, 9+3-pin base with three top caps*'''WG34''' – Same with 1 pentode, 1 power tetrode and passive components (audion, AF preamp and power amp), 50 V/180 mA series heater, 12-pin base*'''WG35''' – Same with 1 pentode, 1 diode, 1 power tetrode and passive components (detector, AF [[Variable-gain amplifier|variable-gain preamp]] and power amp), 63 V/180 mA series heater, 12-pin base with a tetrode grid top cap*'''WG36''' – Same with 1 triode and 2 pentodes (mixer, oscillator and IF amp), 65 V/180 mA series heater, 12-pin base*'''WG37''' – Same with 1 tetrode, 2 pentodes and passive components (RF preamp, audion and AF power amp), 75 V/180 mA series heater, 12-pin base*'''WG38''' – Same with 2 pentodes and a triode*'''SY''' – [[Standard Telephones and Cables]] Australia branch, Sydney plant (''not'' Sylvania Inc.)*'''2-50A''' – 30 kV, 75 mA Half-wave rectifier*'''2-2000A''' – 75 kV, 750 mA Half-wave rectifier*'''2X3000F''' – 25 kV, 3 A Forced-air cooled, half-wave rectifier::*0.625 V DC directly heated for [[Nickel–cadmium battery|NiCd battery]], series-heated two-tube designs such as [[hearing aid]]s. If either filament breaks, further draining of all batteries stops<ref>[https://www.radiomuseum.org/images/tubeenvdiag_klein/d_telefunken_df64.png "Akumed Berlin" hearing-aid eyeglasses schematic] • [https://webspace.science.uu.nl/~tel00101/FotoAlbum/RadioCorner/Sets/BlaOmni.htm "Ideal-Werke Omniton" hearing aid schematic]</ref>:— Heated tubes (all heater/filament letters except '''O''' and '''Z''')::{{anchor|Osemi}}— Heater/filament letter '''O''':<ref name="KriTraTaTa1973">{{cite book |author=<!--Staff writer(s); no by-line.--> |title=Kristalldioden- und Transistoren-Taschen-Tabelle |language=de |publisher=[[Franzis Verlag]] |location=Munich |year=1973 |isbn=978-3-7723-5440-3}}</ref>:*'''A''' – Diode::*'''AP''' – [[Photodiode]]::*'''AZ''' – [[Zener diode]]:*'''C''' – Transistor::*'''CP''' – [[Phototransistor]]:*'''D''' – Power transistor:*'''RP''' – [[Photoresistor]]:*'''Y''' – Power diode:— Heater/filament letters '''M''', '''N''', '''O''', '''Q''', and '''S''': Sequentially assigned number:— All other heater/filament letters: Base type*'''A''' – [[Caesium]]-activated [[antimony]] cathode. Used for reflective-mode photocathodes. Response range from [[Ultraviolet|UV]] to visible, peak sensitivity 420 nm. Widely used.*'''C''' – Caesium-on-oxidated-Silver cathode, also called '''S1'''. Transmission-mode, sensitive from 300...1200 nm, peak at 800 nm. High dark current; used mainly in near-[[Infrared|IR]], with the photocathode cooled.*'''U''' – Caesium-antimony cathode with a quartz window for UV detection, peak sensitivity 400 nm*'''83A1/7980''' – Voltage reference tube, Miniature 7-pin base*'''150B2/6354''' – Voltage reference tube, Miniature 7-pin base* Mazda-[[:File:Pub Mazda.jpg|CIPEL]], batteries (C<suli><u>ie</u></suli> Industrielle des Piles Électriques)* Mazda-[[Westinghouse Electric (1886)|Westinghouse]], light bulbs* Mazda-[[Toshiba]], light bulbs, coexisted with the [[Mazda|Japanese automaker]] in its early years*'''SRL/W314''' – Forced air/water-cooled triode up to 30 MHz, 12 kW*'''SRL364''' – Forced-air cooled triode up to 175 MHz, 14 kW*'''SRL458''' – Forced-air cooled tetrode up to 790 MHz, 10 kW*'''SRL462''' – Forced-air cooled tetrode up to 30 MHz, 25 kW*'''SRS301''' – Radiation-cooled triode up to 40 MHz, 900 W*'''SRS362''' – Radiation-cooled triode up to 100 MHz, 1.25 kW*'''SRS401''' – Radiation-cooled tetrode up to 120 MHz, 1 kW*'''SRS4453''' – Pulse version of the SRS4451*'''SRV355''' – Vapor-cooled triode up to 30 MHz, 50 kW*'''SRW353''' – Water-cooled tetrode up to 220 MHz, 15 kW*'''RA025B''' – 20 kV, 250 mA Half-wave rectifier with an E40 Goliath Edison lamp screw base and an anode screw top cap*'''RA05A''' – 25 kV, 700 mA Half-wave rectifier with an E40 Goliath Edison lamp screw base and an anode screw top cap*'''RA7YB''' – 25 kV, 7 A Half-wave rectifier*'''RD1XB''' – Water-cooled power triode up to 30 MHz, 1 kW*'''RD1.5XA''' – Forced-air cooled power triode up to 30 MHz, 1.5 kW*'''RD2XF''' – Forced-air cooled power triode up to 150 MHz, 2 kW*'''RD3XL''' – Forced-air cooled power triode up to 30 MHz, 2 kW*'''RD5XF''' – Forced-air cooled power triode up to 100 MHz, 5 kW*'''RD5YA''' – Water-cooled power triode up to 20 MHz, 5 kW*'''RD8XA''' – Forced-air cooled power triode up to 3 MHz, 8 kW*'''RD12XB''' – Forced-air cooled power triode up to 30 MHz, 12 kW*'''RD12YB''' – Water-cooled power triode up to 30 MHz, 12 kW*'''RD18YA''' – Water-cooled power triode up to 30 MHz, 18 kW*'''RD20VL''' – Vapor-cooled power triode up to 100 MHz, 20 kW*'''RD20XF''' – Forced-air cooled power triode up to 30 MHz, 20 kW*'''RD50VL''' – Vapor-cooled power triode up to 100 MHz, 50 kW*'''RD50XA''' – Forced-air cooled power triode up to 3 MHz, 50 kW*'''RD50YA''' – Water-cooled power triode up to 10 MHz, 50 kW*'''RD75YB''' – Water-cooled power triode up to 3 MHz, 75 kW*'''RE1000F''' – Radiation-cooled beam tetrode up to 150 MHz, 1 kW*'''RE041XL''' – Forced-air cooled beam tetrode up to 250 MHz, 500 W*'''RE0125XL''' – Forced-air cooled beam tetrode up to 500 MHz, 150 W*'''RE025XA''' – Forced-air cooled beam tetrode up to 500 MHz, 250 W*'''RE1.5XL''' – Forced-air cooled beam tetrode up to 250 MHz, 2 kW*'''RE5XL''' – Forced-air cooled beam tetrode up to 250 MHz, 5 kW*'''UA1A''' – 8 kV, 1 A Half-wave Mercury-vapor rectifier with an E40 Goliath Edison lamp screw base and an anode screw top cap*'''UA3A''' – 11 kV, 3 A Half-wave Mercury-vapor rectifier with an E40 Goliath Edison lamp screw base and an anode screw top cap*'''6АЖ5 = 6AJ5''' – Low (6.3-80 V) anode voltage, sharp-cutoff pentode*'''ЛП''' ⟼ '''LP''' – [[Trochotron]]*'''6M-DE1''' – Diode + "Magic Eye"-type tuning indicator, Miniature 7-pin base B7G*'''6AJ5''' – Low (6.3-80 V) anode voltage, sharp-cutoff pentode*'''6AQ8/ECC85''' – Dual RF/VHF triode with separate cathodes and an internal shield between the two sections, designed for use as oscillator and mixer in FM receivers. The heater to cathode insulation is inadequate for use in [[cascode]] operation; similar to '''6BK7''', '''6BQ7''', '''6BZ7'''*'''6BK7''' – Dual RF/VHF triode with separate cathodes and an internal shield between the two sections; similar to '''6BQ7''', '''6BZ7''', '''6AQ8/ECC85'''*'''6BQ7''' – Dual RF/VHF triode with separate cathodes and an internal shield between the two sections, which can be used independently or in a [[cascode]] stage; similar to '''6BK7''', '''6BZ7''', '''6AQ8/ECC85'''*'''6BZ7''' – Dual RF/VHF triode with separate cathodes and an internal shield between the two sections; similar to '''6BK7''', '''6BQ7''', '''6AQ8/ECC85'''*'''6ES8''', ''ECC189'' – Dual triode used as [[cascode]] RF amplifier in TV tuners and VHF receiver front ends, also used as general-purpose dual triode in test gear; similar to 6DJ8*'''5734''' – ''Mechanotron''-type mechano-electronic displacement [[sensor]] - a vacuum triode with its anode mounted on a shaft that extends through a thin, flexible metal diaphragm, shaft movement is reflected in anode current, Fres = 12 kHz*'''6694''', '''6957''', '''7412''', '''7536''', '''7633/ORP11''', '''8217''', '''8474''', '''8475''', '''8476''', '''8477''', '''8478''', '''8582''' – [[Cadmium sulfide|CdS]] [[photoresistor]]s (LDR)*'''6762''' – ''Wamoscope'' ("'''Wa'''ve '''mo'''dulated oscillo'''scope'''"), a [[Traveling-wave tube|TWT]]/[[Cathode ray tube|CRT]] combination used to directly visualize an incoming microwave signal by electron velocity-sorting<ref>{{cite web |url=http://www.mif.pg.gda.pl/homepages/frank/sheets/201/6/6762.pdf |publisher=[[Sylvania Electric Products]] |title=''6762 Wamoscope'' data sheet |date=17 January 1957 |access-date=1 May 2017}}</ref>*'''6922''' (''E88CC'') – Dual triode used as cascode RF amplifier, industrial version of ''6DJ8/ECC88''*'''6973''' (6CZ5) – Beam power pentode popular in some makes of 1960s era guitar amplifiers, though rarely implemented in modern times.*'''7416''' – Constant firing diode, a gas-filled cold-cathode switching diode with a very stable breakdown voltage over age and temperature, for use as a trigger in RC timing crcuits, Miniature 7-pin base*'''7551''' (12-15V heater for mobile equipment), '''7558''' (6.3V heater for fixed equipment) – 175 MHz, 10 W Noval-base beam power pentode used for telephony, RF amplification, and more rarely AF amplification*'''7846''' – [[Cadmium selenide|CdSe]] [[infrared]] (500...900 nm) [[photoresistor]], 2-pin all-glass pigtailed*'''8032A''' ('''6883B''', '''8552''' – 13.5V heater), '''8298A''' ('''6146B''' – 60 MHz, 120 W Power AF/RF/VHF beam pentode*'''EA76''' (6489) – Diode, all-glass round cross-section envelope, circular 5-pin/pigtails base*'''EA766''' (5704)(5704) – Diode, 5-pin all-glass pigtailed*'''EB41''' – Low-power dual diode, UB41 with a different heater*'''EBC41''' – Shielded low-power dual diode + triode, UBC41 with a different heater, EBC81/6BD7A with a different basing*'''EBF83/6DR8''' – Common cathode dual diode + low (6.3-50 V) anode voltage pentode for use as IF amplifier, detector and AGC diode in vehicle equipment, noval base*'''ECC89/6FC7''' – Dual triode used as cascode RF amplifier in TV tuners and VHF receiver front ends, or as general-purpose [[instrumentation]] dual triode, noval base*'''ECC832/12DW7/7247''' – Dual dissimilar AF triode, a combination of one ECC83/[[12AX7]] system for use as a high-gain amplifier and one ECC82/[[12AU7]] system for use as a phase inverter or cathode follower*'''ECH43''' – Remote-cutoff triode/hexode oscillator/mixer, low-microphonics version of ECH42; UCH43 with a different heater*'''ECLL800''' – Triode + dual screened power pentode, for 9.2 W (Class-B) or 8.5 W (Class-AB) AF push-pull power amplifiers. The triode shares its control grid with the 1st pentode and acts as a phase inverter for the 2nd pentode, both pentodes share screen and suppressor grids, Noval base<ref>ECLL800 [http://www.mif.pg.gda.pl/homepages/frank/sheets/062/e/ECLL800.pdf data sheet] • [http://www.4tubes.com/2-SCHEMATICS/BY-TUBES/ECLL800/ECLL800-Schaltung.jpg circuit]</ref>*'''E80F/6084''' – AF or [[electrometer]] pentode, Gold-plated pins*'''EFP60''' – Secondary emission wide band pentode for TV amplifiers*'''EL31''' – Power pentode very similar to EL38/6CN6*'''EL300/6FN5''' – CRT horizontal deflection power pentode, octal base, identical to PL300/35FN5 except for heater ratings*'''EL844''' – RF power pentode*'''{{Visible anchor|EY80}}''' – TV horizontal output booster diode, identical to PY80 except for heater ratings*'''MC1''' = '''RL2T15''' – AF triode for use in audions<ref name="MC1">{{cite web |url=http://www.mif.pg.gda.pl/homepages/frank/sheets/043/m/MC1.pdf |title=''MC1 Triode für Niederfrequenz und Audion'' data sheet |language=de |publisher=[[Telefunken]] |access-date=4 January 2014}}</ref><ref name="TFK-Catalog_Datasheet">{{cite web |url=http://www.4tubes.com/1-DATASHEETS/SCANS-Original/S-T-U/TFK-Catalog_Datasheet.pdf |title=''Telefunken catalogue'' |language=de |publisher=[[Telefunken]] |access-date=1 May 2017}}</ref><ref name="Bogner2002">{{cite web |url=https://www.radiomuseum.org/forumdata/users/5100/Entwicklung_des_UKW_Teil6_Folge6_v11.pdf |author=Gerhard Bogner |title=Funkgeschichte 144: Entwicklung des UKW-Rundfunks, Teil 6: Zeitraum 1934 -1940, Folge 6: Spezial- und Wehrmachts-Röhren, UKW-Röhren (RadioHistory 144: Developing VHF radio, part 6: Period 1934-1940, subpart 6: Special and Wehrmacht tubes, FM tubes) |language=de |location=Neu-Ulm, Germany |year=2002}}</ref>*'''MF2''' = '''RV2P800''' – RF pentode<ref name="MF2">{{cite web |url=http://www.mif.pg.gda.pl/homepages/frank/sheets/043/m/MF2.pdf |title=''MF2 HF-Pentode'' data sheet |language=de |publisher=[[Telefunken]] |access-date=4 January 2014}}</ref><ref name="TFK-Catalog_Datasheet" /><ref name="Bogner2002" />*'''NF2''' – Sharp-cutoff RF pentode;<ref name="NF2">{{cite web |url=http://www.mif.pg.gda.pl/homepages/frank/sheets/043/n/NF2.pdf |title=''NF2 HF-Pentode'' data sheet |language=de |publisher=[[Telefunken]] |access-date=4 January 2014}}</ref><ref name="TFK-Catalog_Datasheet" /> identical to AF7 and CF7 except for heater ratings, and also produced by [[Japan Radio Company|JRC]] in the then-[[Axis powers|axis power of Japan]]<ref name="戦前の日本独自の特殊管 - 日本無線が作った特殊受信管">{{cite web |url=https://radiomann.sakura.ne.jp/HomePageVT/Radio_tube_22.html#Tab2 |title=戦前の日本独自の特殊管 - 日本無線が作った特殊受信管 (Japan Oriented Special Tubes before WWII - Special Receiving Tubes manifactured by Japan Radio Corp.) |first1=Koji |last1=HAYASHI |first2=Ibaraki |last2=JAPAN |language=ja}}</ref>*'''NF6''' = '''RV12P2000''' – RF pentode<ref>[https://www.radiomuseum.org/tubes/tube_nf6.html NF6 on radiomuseum.org]</ref><ref name="Bogner2002" />; also produced by JRC in Japan<ref name="戦前の日本独自の特殊管 - 日本無線が作った特殊受信管" />*'''PF83''' – AF remote-cutoff pentode for use as a [[Variable-gain amplifier|VCA]] in remotely controllable TV receivers*'''PF86''' – AF Pentode, also for use in ''[[Dynatron oscillator|Transitron]]'' circuits in TV receivers. Identical to EF86/6BK8 and UF86 except for heater ratings*'''PL81/21A6''' – AF, or CRT horizontal deflection output power pentode*'''PL82/16A5''' – AF, or CRT vertical deflection output power pentode*'''PL300/35FN5''' – CRT horizontal deflection power pentode, octal base, identical to EL300/6FN5 except for heater ratings*'''PL505/40KG6''' – CRT horizontal deflection output power pentode for color TV, EL505/6KG6 with a different heater*'''PL509/40KG6A''' – PL505/40KG6 with an increased max. anode dissipation, EL509/6KG6A with a different heater*'''PM84''' – Side-view, band-type [[Magic eye tube|tuning/level indicator]] for use in TV receivers, UM84/12FG6 with a different heater*'''SD1A''' – Shortwave power triode<ref name="SD1A">{{cite web |url=http://www.mif.pg.gda.pl/homepages/frank/sheets/043/s/SD1A.pdf |title=''SD1A Kurzwellen-Triode'' data sheet |language=de |publisher=[[Telefunken]] |access-date=4 January 2014}}</ref><ref name="TFK-Catalog_Datasheet" /><ref name="Bogner2002" />*'''UBC41''' – Shielded dual diode - AF triode, EBC41 with a different heater, UBC81 with a different basing*'''UCH42/14K7''' – Remote-cutoff triode/hexode oscillator/mixer, Rimlock base, ECH42 with a different heater*'''UCH43''' – Remote-cutoff triode/hexode oscillator/mixer, low-microphonics version of UCH42; ECH43 with a different heater*'''ZZ1030''' (STV500-0,1) – Quad 125 V Voltage references, noval base, used all series-connected to stabilize the [[dynode]] voltages of [[Photomultiplier tube|photomultipliers]]*'''BA9/20 = 7635''' – X-band, 20 mW, Forced-air cooled backward-wave oscillator*'''BA16/10''' = 7636 – Ku band, 10 mW, Backward-wave oscillator*'''DCG4/1000G''' (866A) – Mercury-vapor rectifier*'''DCG5/5000GB''' (872A) – Mercury-vapor rectifier*'''DCG5/5000GS''' (8008A, ZY1001) – Mercury-vapor rectifier*'''DCG6/18''' (6693) – Mercury-vapor rectifier*'''DCG9/20''' (6508) – Mercury-vapor rectifier*'''DCG12/30''' (5870) – 12 kV, 30 A Grid-controlled, half-wave Mercury-vapor rectifier with anode top cap*'''DCX4/1000''' (3B28) – 4 kV, 1 kW Half-wave Xenon rectifier with anode top cap*'''DCX4/5000''' (4B32) – 4 kV, 5 kW Half-wave Xenon rectifier with anode top cap*'''PE1/100''' (6083, YL1200) – 100 W Shortwave pentode*'''QB2/250''' (813) – Beam tetrode*'''QB3/300''' (6155, 4D21, 4-125A) – Beam tetrode*'''QB3.5/750''' (6156, 5D22, 4-250A) – Beam tetrode*'''QB4/1100''' (7527) – Beam tetrode*'''QB5/1750''' (6179) – Beam tetrode*'''QBL4/800''' (4X500A) – Forced-air cooled 800 W beam-tetrode*'''QBL5/3500''' (6076) – Forced-air cooled 3500 W beam-tetrode*'''QBW5/3500''' (6075) – Water-cooled 3500 W beam-tetrode*'''QC05/35''' (8042) – 35 kW Beam-tetrode*'''QE06/50''' (807) – 50 W Radiation-cooled output beam-tetrode*'''QE08/200''' (7378) – 200 W Beam-tetrode*'''QEL1/150''' (4X150A, 7034) – Forced-air cooled 150 W beam-tetrode*'''QQC03/14''' (7983) – 14 W Dual beam-tetrode*'''QQC04/15''' (5895) – Dual beam-tetrode*'''QQE04/20''' (832A) – Dual beam-tetrode*'''TB3/750''' (5867) – Radiation-cooled power triode*'''TB4/1250''' (5868) – Radiation-cooled power triode*'''TB5/2500''' (7092) – 5 kV, 2.5 kW Radiation-cooled power triode*'''TBL2/300''' (7004) – 2 kV, 300 W Forced-air cooled power triode*'''TBL6/14''' (7804) – Forced-air cooled power triode*'''TBL6/4000''' (7753) – Forced-air cooled power triode*'''TBL6/6000''' (5924) – Forced-air cooled power triode*'''TBL7/8000''' (6961) – Forced-air cooled power triode*'''TBL12/38''' (7806) – Forced-air cooled power triode*'''TBL12/100''' (6078) – Forced-air cooled power triode*'''TBW6/14''' (7805) – 6 kV, 14 kW Water-cooled power triode*'''TBW6/6000''' (5923) – Water-cooled power triode*'''TBW7/8000''' (6960) – Water-cooled power triode*'''TBW12/38''' (7807) – Water-cooled power triode*'''TBW12/100''' (6077) – Water-cooled power triode*'''XR1/1600A''' (8063) – Improved XR1/1600*'''XR1/3200A''' (7981) – 1.5 kV, 40 A Inert gas-filled triode thyratron with anode top cap*'''DDR100 – 100 g max., 250 Hz max., Mechanotron-type 1-axis accelerometer[[Siemens Building Technologies#History|Cerberus]]:*'''E''' – Early directly heated triode derived from the French TM tube*'''ECT100''' – 1 MHz, top-viewing, bidirectional, decade Dekatron<ref name="ECT100">{{cite web |url=http://www.tube-tester.com/sites/nixie/dat_arch/EZ10B_ECT100.pdf |title=Elesta application manual |language=de |publisher=Elesta |access-date=1 May 2018}}</ref>*'''EZ10B''' – 1 MHz max. Decade Counter/Selector Dekatron<ref name="EZ10">{{cite web |url=http://www.tube-tester.com/sites/nixie/dat_arch/EZ10.pdf |title=''Technische Mitteilungen - Neuentwicklungen im Röhrenbau'' application note |language=de |publisher=Elesta |date=March 1958 |access-date=1 May 2018}}</ref><ref name="EZ10B">{{cite web |url=http://www.tube-tester.com/sites/nixie/dat_arch/EZ10A_EZ10B.pdf |title=''Technische Mitteilungen - Die Dekadenzählröhre EZ10B'' application note |language=de |publisher=Elesta |date=February 1961 |access-date=1 May 2018}}</ref>[[Electro-Harmonix]]:*'''1063A''' – Three-phase, half-wave, Argon/Mercury-vapor Tungar bulb, a low-voltage rectifier for charging 90-cell lead-acid batteries at 6 A per phase; 1.9 V, 11 A heater*'''1069K''' – Full-wave Tungar bulb for DC welding service at 60 A; 3.25 V, 70 A heater, forced-air cooling*'''1533A''' – Three-phase, half-wave, Argon/Mercury-vapor Tungar bulb, a low-voltage rectifier for charging 110-cell lead-acid batteries at 15 A per phase; 1.9 V, 23 A heater*'''1543A''' – Three-phase, half-wave, Argon/Mercury-vapor Tungar bulb, a low-voltage rectifier for charging 110-cell lead-acid batteries at 25 A per phase; 1.9 V, 36 A heater*'''1553A''' – Three-phase, half-wave, Argon/Mercury-vapor Tungar bulb, a low-voltage rectifier for charging 110-cell lead-acid batteries at 40 A per phase; 1.9 V, 70 A heater*'''329''' – 1.15 A, Dual (5...15 and 10...30 V) ballast tube for use with the 328 Tungar bulb*'''451''' – Full-wave, Argon-filled Tungar bulb, a low-voltage rectifier for charging 6V lead-acid batteries at 1.3 A*'''452''' – 1.15 A, Dual (3.5...10 and 7...20 V) ballast tube for use with the 451 Tungar bulb<ref>Valvo Taschenbuch 1962</ref>*'''5BP1''' (1802-P1) – 5" CRT for use in pre-World War II oscilloscopes. Electrostatic deflection, P1 green, short-persistence phosphor<ref name="5BP">http://www.mif.pg.gda.pl/homepages/frank/sheets/121/5/5BP1.pdf</ref>*'''5BP3''' (1802-P3) – Pre-World War II, 5" CRT, electrostatic deflection, P3 yellow, medium-persistence phosphor<ref name="5BP" />*'''5BP4''' (1802-P4) – 5" CRT used in pre-World War II television receivers, such as the RCA TRK-5 and in early radars such as the SCR-268 and SCR-270.<ref>https://www.crtsite.com/tv-crt.html</ref> Electrostatic deflection, P4 white, medium-persistence phosphor.<ref name="5BP" />*'''5BP11A''' – 5" CRT, electrostatic deflection, P11 blue, short-persistence phosphor<ref>http://www.mif.pg.gda.pl/homepages/frank/sheets/041/5/5BP1A.pdf</ref>*'''920''' – Dual gas-filled phototube, caesium-coated cathode with spectral S1 response (red/infrared, maximum sensitivity at 750 nm), 4-pin base, for use in a differential circuit to read variable-area film soundtracks*'''931''' – First commercially available [[Photomultiplier tube|photomultiplier]], 9-stage, spectral S4 response, 11-pin base, still in production today*'''5Ц3С''' ⟼ '''5C3S''' – Full-wave rectifier [[File:Commons-logo.svg|16x16px|link=:Commons:Category:5Ts3S|class=noviewer|alt=]]*'''6Н8С''' ⟼ '''6N8S''' (6SN7/ECC33) – Separate cathodes, high-mu dual triode for use as a flip-flop in early Soviet computers such as Урал-1 and Урал-2, octal base<ref>[http://www.mif.pg.gda.pl/homepages/frank/sheets/113/6/6N8S.pdf 6N8S/6Н8С data sheet] • [https://www.computer-museum.ru/english/ural_1.php Урал-1] • [https://www.computer-museum.ru/english/ural_2.php Урал-2]</ref>*'''6П45С''' ⟼ '''6P45S''' – Beam-power tetrode [[File:Commons-logo.svg|16x16px|link=:Commons:Category:6P45S|class=noviewer|alt=]]*'''6С33С''' ⟼ '''6S33S''' – Power triode [[File:Commons-logo.svg|16x16px|link=:Commons:Category:6S33S|class=noviewer|alt=]]*'''6МУХ6П''' ⟼ '''6MUH1P''' – Mechanotron-type rotation sensor; a vacuum dual diode with one anode mounted on a shaft that extends through a vacuum-tight bearing*'''6МН1Б''' ⟼ '''6MN1B''' – Mechanotron-type displacement sensor; a vacuum dual triode with one anode mounted on a shaft that extends through a diaphragm*'''2XM400''' – Directly-heated, 4 kV/400 mA half-wave rectifier, 4 V/2.35 A heater—Rejected for various reasons:
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