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List of Vacuum Tubes (part2)

Page 2   (page 1)

YL
[edit]

  • YL1000/8463 - RF power pentode
  • YL1020/8118 - See QQZ03/20
  • YL1030 - See QQZ06/40
  • YL1050 - RF power tetrode
  • YL1060/7854 - See QQE06/40
  • YL1070/8117 - RF power pentode
  • YL1071 - YL1070 with a different heater
  • YL1080/8348 - RF power pentode
  • YL1120 - RF power tetrode
  • YL1130/8408 - RF power pentode
  • YL1150/8579 - RF power pentode
  • YL1190/8580 - RF power pentode
  • YL1200 - See PE1/100
  • YL1210 - QQE03/12 with a different heater
  • YL1220 - QQE02/5 with a different heater
  • YL1240/8458 - RF power pentode
  • YL1250/8505 - RF power pentode
  • YL1270/8581 - RF power pentode
  • YL1290 - QE08/200 with a different heater
  • YL1310/8603 - RF power pentode
  • YL1360 - QQE04/5 with a different heater
  • YL1570 (RS 1084 CJ) - RF power tetrode

Z - Gas-filled tubes[edit]

Note: See also standard M-P tubes under Z

ZA[edit]

  • ZA1000 Neon-filled, coaxial, tritium-primed (half-life: 12.32 years), sputtered-molybdenum cold-cathode switching diode, meshed cylinder anode, all-glass pigtailed[58]
  • ZA1001 Neon-filled, coaxial, tritium-primed, sputtered-molybdenum cold-cathode switching diode with traces of heavy gas (krypton/xenon) for slow de-ionization, e.g. for low-frequency relaxation oscillators; meshed cylinder anode, all-glass pigtailed
  • ZA1002 Neon-filled, coaxial, tritium-primed, sputtered-molybdenum cold-cathode switching diode, large difference between burning and ignition voltage, meshed cylinder anode, 3-pin all-glass pigtailed
  • ZA1003 Neon-filled, coaxial, tritium-primed, sputtered-molybdenum cold-cathode switching diode for use as indicator tube in transistorizedcircuits, meshed cylinder anode, 3-pin all-glass pigtailed
  • ZA1004 Neon-filled, coaxial, tritium-primed, sputtered-molybdenum cold-cathode switching diode, small difference between burning and ignition voltage, for use as indicator tube in transistorized circuits, meshed cylinder anode, 3-pin all-glass pigtailed
  • ZA1005 Neon-filled, coaxial, tritium-primed, sputtered-molybdenum cold-cathode switching diode for use like a DIAC in thyristor circuits, meshed cylinder anode, 2-pin all-glass pigtailed

ZC[edit]

  • ZC1010 (Z661W) 8 mAavg, 50 mApeak, Gas-filled, cold-cathode AC trigger pentode, two starters and a primer electrode, positive starter voltage, 5-pin all-glass pigtailed, envelope inside radioactively coated for a constant ignition voltage, for use in bidirectional counters
  • ZC1040 25 mA, Gas-filled, cold-cathode AC trigger tetrode, one starter and a primer electrode, positive starter voltage, noval base
  • ZC1050 2 mA, Gas-filled, cold-cathode, luminiscent trigger tetrode, one starter and a primer, 300 mlm light output[59] for use as self-displaying shift register cells in large-format, crawling-text dot-matrix displays;[60] all-glass pigtailed
  • ZC1060 20 mAavg, 5 kApeak, Gas-filled, cold-cathode, high-current trigger triode for e.g. capacitor discharge circuits. One external (capacitive) starter electrode

ZM[edit]

  • ZM1000  0 1 2 3 4 5 6 7 8 9  Neon-filled digital indicator tube, 14 mm character height side-viewing, left decimal point
  • ZM1000R ZM1000 with a red contrast filter coating
  • ZM1001  + - ~ X Y Z  Neon-filled digital indicator tube, 14mmCH side-viewing, for use with ZM1000
  • ZM1001R ZM1001 with a red contrast filter coating, for use with ZM1000R
  • ZM1002  ns μs ms s Hz kHz MHz  Neon-filled digital indicator tube, 13mmCH side viewing, for use with ZM1000 in digital frequency counters
  • ZM1003  1 - +  Neon-filled digital indicator tube, 14mmCH side-viewing, for use with ZM1000
  • ZM1005  0 1 2 3 4 5 6 7 8 9  Long-life neon-filled digital indicator tube, 14mmCH side-viewing, left decimal point, multiplex-capable
  • ZM1005R ZM1005 with a red contrast filter coating
  • ZM1006  1 2 3 4 5 6  Neon-filled digital indicator tube, side-viewing, left and right decimal point, for use in TV receivers
  • ZM1008  0 1 2 3 4 5 6 7 8 9  Neon-filled digital indicator tube, 14mmCH side-viewing
  • ZM1010  0 1 2 3 4 5 6 7 8 9  Neon-filled digital indicator tube, 14mmCH side-viewing, left decimal point
  • ZM1012  0 1 2 3 4 5 6 7 8  Neon-filled digital indicator tube, 14mmCH side-viewing
  • ZM1015  0 1 2 3 4 5 6 7 8  Neon-filled digital indicator tube, 14mmCH side-viewing



  • ZM1020 (Z520M) ZM1022 with a red contrast filter coating



  • ZM1021 (Z521M) ZM1023 with a red contrast filter coating, for use with ZM1020



  • ZM1022  0 1 2 3 4 5 6 7 8 9  Neon-filled digital indicator tube, 15.5mmCH top-viewing, no decimal point
  • ZM1023  A V Ω % + - ~  Neon-filled digital indicator tube, 15.5mmCH top-viewing, for use with ZM1022 in digital multimeters
  • ZM1024 ZM1025 with a red contrast filter coating, for use with ZM1020
  • ZM1025  c/s Kc/s Mc/s μs ms ns s  Neon-filled digital indicator tube, 15.5mmCH top-viewing, for use with ZM1022 in digital frequency counters
  • ZM1030 ZM1032 with a red contrast filter coating
  • ZM1031 ZM1031/01 without the  ~ 
  • ZM1031/01 ZM1033/01 with a red contrast filter coating, for use with ZM1030
  • ZM1032  0 1 2 3 4 5 6 7 8 9  Neon-filled digital indicator tube, 15.5mmCH side-viewing, no decimal point, 5 dual cathodes and separate odd/even anode compartments for biquinary multiplexing
  • ZM1033/01  + - ~  Neon-filled digital indicator tube, 15.5mmCH side-viewing, separate anode compartment for  + , for use with ZM1032



  • ZM1040 (Z522M) ZM1042 with a red contrast filter coating
  • ZM1041 ZM1043 with a red contrast filter coating, for use with ZM1040
  • ZM1041S ZM1043S with a red contrast filter coating, for use with ZM1040



  • ZM1042 (Z5220M)  0 1 2 3 4 5 6 7 8 9  Neon-filled digital indicator tube, 30mmCH side-viewing, no decimal point
  • ZM1043  + -  Neon-filled digital indicator tube, 30mmCH side-viewing, for use with ZM1042
  • ZM1043S  Y X + W U Z -  Neon-filled digital indicator tube, 30mmCH side-viewing, for use with ZM1042
  • ZM1047 ZM1049 with a red contrast filter coating, for use with ZM1040
  • ZM1049  T F S N Z Y G H M X  Neon-filled digital indicator tube, side-viewing, for use with ZM1042 in numerical control systems
ZM1070
 
ZM1070



  • ZM1050 (Z550M, 8453) Neon-filled digital indicator tube, top-viewing, dekatron-type readout with common anode and common cathodes, pulsating anode voltage, controlled by 5-volts sensitive starter electrodes, fortransistorized circuits
  • ZM1060 (Z505S) Argon-filled, 50 kHz decade Counter/Selector Dekatron
  • ZM1070 (Z504S, 8433) Neon-filled, 5 kHz decade Counter/Selector Dekatron
  • ZM1080 ZM1082 with a red contrast filter coating
  • ZM1081 ZM1083 with a red contrast filter coating, for use with ZM1080
  • ZM1082  0 1 2 3 4 5 6 7 8 9  Neon-filled digital indicator tube, 14mmCH side-viewing, no decimal point, probe electrode
  • ZM1083  + - ~  Neon-filled digital indicator tube, 14mmCH side-viewing, for use with ZM1082
  • ZM1100  0 1 2 3 4 5 6 7 8 9  Neon-filled digital indicator tube, 15.5mmCH top-viewing
  • ZM1120 ZM1122 with a red contrast filter coating
  • ZM1122  0 1 2 3 4 5 6 7 8 9  Miniature neon-filled digital indicator tube, 7.8mmCH top-viewing
  • ZM1130 ZM1132 with a red contrast filter coating
  • ZM1131 ZM1133 with a red contrast filter coating, for use with ZM1080
  • ZM1132  0 1 2 3 4 5 6 7 8 9  Neon-filled digital indicator tube, side-viewing, left and right decimal point
  • ZM1133  + - ~  Neon-filled digital indicator tube, side-viewing, for use with ZM1132
  • ZM1136L/R ZM1138L/R with a red contrast filter coating
  • ZM1137 ZM1139 with a red contrast filter coating, for use with ZM1136L/R
  • ZM1138L/R  0 1 2 3 4 5 6 7 8 9  Neon-filled digital indicator tube, 13mmCH side-viewing, left or right decimal points (specify)
  • ZM1139  + - ~ Ω  Neon-filled digital indicator tube, 13mmCH side-viewing, for use with ZM1138 in digital multimeters
  • ZM1162  0 1 2 3 4 5 6 7 8 9  Long-life neon-filled digital indicator tube, 15.5mmCH top-viewing, no decimal point, rectangular envelope for close stacking in both axes
  • ZM1170 ZM1172 with a red contrast filter coating
  • ZM1172  0 1 2 3 4 5 6 7 8 9  Neon-filled digital indicator tube, 15.5mmCH side-viewing, no decimal point
  • ZM1174 ZM1175 with a red contrast filter coating
  • ZM1175  0 1 2 3 4 5 6 7 8 9  Neon-filled digital indicator tube, 15.5mmCH side-viewing, left decimal point
  • ZM1176 ZM1177 with a red contrast filter coating
  • ZM1177 ZM1175, but right decimal point
  • ZM1180 ZM1182 with a red contrast filter coating
  • ZM1181 ZM1183 with a red contrast filter coating, for use with ZM1180
  • ZM1182  0 1 2 3 4 5 6 7 8 9  Neon-filled digital indicator tube, 16mmCH top-viewing, no decimal point, semi-rectangular envelope for close horizontal stacking
  • ZM1183  + - ~ Ω  Neon-filled digital indicator tube, top-viewing, 13mmCH for use with ZM1182 in digital multimeters
  • ZM1184D ZM1185D with a red contrast filter coating
  • ZM1185A (GR1420)  1 2 3 4 5 6 U K E R  Neon-filled digital indicator tube, 16mmCH top-viewing
  • ZM1185D (GR1430)  ∇ Δ  Neon-filled digital indicator tube, 16mmCH top-viewing, for use in elevators
  • ZM1185E (GR1472)  0 1 2 3 4 5 - t kg +  Neon-filled digital indicator tube, 16mmCH top-viewing
  • ZM1200 Pandicon, multiplexed 14-digit display tube with decimal points and punctuation marks, pin connections on both ends
  • ZM1202 12-Digit Pandicon
  • ZM1204 10-Digit Pandicon
  • ZM1206 8-Digit Pandicon
ZM1210
 
ZM1210
  • ZM1210 ZM1212 with a red contrast filter coating
  • ZM1212  0 1 2 3 4 5 6 7 8 9  Neon-filled digital indicator tube, 15.5mmCH side-viewing, left decimal point, all-glass pigtailed
  • ZM1220 ZM1222 with a red contrast filter coating
  • ZM1222  0 1 2 3 4 5 6 7 8 9  Large neon-filled digital indicator tube, 40mmCH side-viewing
  • ZM1230 ZM1232 with a red contrast filter coating
  • ZM1232  0 1 2 3 4 5 6 7 8 9  Neon-filled digital indicator tube, 15.5mmCH upside-down side-viewing, no decimal point
  • ZM1240 ZM1242 with a red contrast filter coating
  • ZM1241 ZM1243 with a red contrast filter coating, for use with ZM1240
  • ZM1242  0 1 2 3 4 5 6 7 8 9  Neon-filled digital indicator tube, 16mmCH side-viewing, right decimal point
  • ZM1243  + - ~ Ω  Neon-filled digital indicator tube, 16mmCH side-viewing, for use with ZM1242 in digital multimeters
  • ZM1263  ~ ⚫  Neon-filled digital indicator tube, 10mmCH side-viewing
  • ZM1290 ZM1292 with a red contrast filter coating
  • ZM1292  0 1 2 3 4 5 6 7 8 9  Neon-filled digital indicator tube, 10mmCH side-viewing
  • ZM1330 ZM1332 with a red contrast filter coating
  • ZM1331 ZM1333 with a red contrast filter coating, for use with ZM1330
  • ZM1332  0 1 2 3 4 5 6 7 8 9  Neon-filled digital indicator tube, 13.1mmCH side-viewing, left and right decimal points, all-glass pigtailed
  • ZM1333  + - ~ Ω  Neon-filled digital indicator tube, 13.1mmCH side-viewing, all-glass pigtailed, for use with ZM1332 in digital multimeters
  • ZM1334 ZM1336 with a red contrast filter coating
  • ZM1335 ZM1337 with a red contrast filter coating, for use with ZM1334
  • ZM1336  0 1 2 3 4 5 6 7 8 9  Neon-filled digital indicator tube, 13.1mmCH side-viewing, left and right decimal points, multiplex-capable
  • ZM1337  + - ~ Ω  Neon-filled digital indicator tube, 13.0mmCH side-viewing, right decimal point (!), all-glass pigtailed, red contrast filter coating, for use with ZM1336 in digital multimeters
  • ZM1350 Varisymbol, planar neon-filled digital 40mm x 27mm fourteen-segment display tube, right decimal point, separate underscore text cursor, keep-alive cathode, multiplex-capable, viewing angle 160°
  • ZM1360 ZM1350 with 60mm x 40mm characters
  • ZM1370 ZM1350 with 20mm x 13mm characters
  • ZM1410 ZM1412 with a red contrast filter coating
  • ZM1412 Neon-filled digital seven-segment display tube, 8.6mmCH side-viewing, right decimal point and left punctuation mark, all-glass pigtailed
  • ZM1500 Pandicon, multiplexed 12-digit, 7-segment display tube
  • ZM1550 Planar neon-filled digital two-digit seven-segment display tube, right decimal points
  • ZM1551 Planar neon-filled digital 1½-digit seven-segment display tube with  +  and  -  signs, right decimal points

Note: More Nixie tubes under standard - ZM and other letter - GR

ZP[edit]

  • ZP1000 - Borium tri-fluoride-filled Geiger-Müller tubethermal neutrons
  • ZP1010 - Borium tri-fluoride-filled Geiger-Müller tube, thermal neutrons
  • ZP1020 - Borium tri-fluoride-filled Geiger-Müller tube, thermal neutrons
  • ZP1070 - Subminiature Geiger-Müller tube, all-glass pigtailed
  • ZP1080 - Halogen-quenched Geiger-Müller tube, β and γ
  • ZP1100 - Halogen-quenched Geiger-Müller tube, γ; pigtailed
  • ZP1200 - Halogen-quenched Geiger-Müller tube, γ
  • ZP1300 - Halogen-quenched Geiger-Müller tube, γ and high-energy β
  • ZP1330 - Halogen-quenched Geiger-Müller tube, for use in damp and/or saline atmosphere, β and γ
  • ZP1400 - Halogen-quenched Geiger-Müller tube, 9mm diameter mica window, β and γ
  • ZP1430 - Halogen-quenched Geiger-Müller tube, 27.8mm diameter mica window, α, β, γ
  • ZP1490 - Halogen-quenched Geiger-Müller tube, 28mm diameter mica window, low-level α, β and γ
  • ZP1600 - Halogen-quenched Geiger-Müller tube, 19.8 mm diameter mica window, X-rays, 6.0 to 20 keV energy, 60 to 200 pm wavelength range
  • ZP1610 - Side window, organically quenched Geiger-Müller tube. 7 x 18 mm mica window; X-rays, 2.5 to 40 keV energy, 30 to 500 pm wavelength range
  • ZP1700 - Halogen-quenched, cosmic-ray guard counter tube for low-background measurements; to be used with another radiation counter tube in an anticoincidence circuit
  • ZP1800 - Halogen-quenched Geiger-Müller tube for use at temperatures up to 200 °C, γ
  • ZP1810 - Halogen-quenched Geiger-Müller tube for use at temperatures up to 200 °C, γ, low sensitivity, up to 40 mGy/h
  • ZP1860 - Halogen-quenched Geiger-Müller tube, β and γ

ZT[edit]

ZX[edit]

  • ZX1000 800 V, 1140 Apk, 13Aavg Ignitron
  • ZX1051 Water-cooled, 56 Aavg Ignitron
  • ZX1052 Water-cooled, 140 Aavg Ignitron
  • ZX1053 Water-cooled, 355 Aavg Ignitron
  • ZX1060 Water-cooled, 10 Aavg Ignitron
  • ZX1061 Water-cooled, 10 Aavg Ignitron
  • ZX1062 Water-cooled, 10 Aavg Ignitron
  • ZX1063 Water-cooled, 10 Aavg Ignitron

ZY[edit]

  • ZY1000 (872B) High voltage, half-wave mercury-vapor rectifier
  • ZY1001/8008A High voltage, half-wave mercury-vapor rectifier, 4-pin base with anode top cap
  • ZY1002 High voltage, half-wave mercury-vapor rectifier, E40 (GoliathEdison screw lamp base with anode top cap

ZZ[edit]

  • ZZ1000 81 V Voltage reference, 2-pin all-glass pigtailed
  • ZZ1010 85 V Voltage reference
  • ZZ1020 (STV85-8) 82 V Voltage reference with primer electrode, 3-pin all-glass pigtailed
  • ZZ1030 (STV500-0,1) Quad 125 V Voltage references, noval base
  • ZZ1031 Quad Voltage reference, noval base
  • ZZ1040 (STV100-60Z) 100 V Voltage reference with primer electrode
  • ZZ1050 82 V Voltage reference, 2-pin all-glass pigtailed

List of European transmitting tubes[edit]

Note: Typecode explained above.

B - Backward-wave amplifier[edit]

BA[edit]

D - Rectifier incl. grid-controlled[edit]

DA[edit]

  • DA1.5/75 1.5 kV, 75 W Half-wave power rectifier, triode TA1.5/75 without grid
  • DA12/24000 24 kV, 12 kW Water-cooled half-wave power rectifier

DC[edit]

  • DC1/50 1 kV, 50 mA Full-wave power rectifier, DC1/60 with dual anode top cap
  • DC1/60 1 kV, 60 mA Full-wave power rectifier
  • DC2/200 2 kV, 200 mA Full-wave power rectifier with dual anode top cap

DCG[edit]

  • DCG1/125 1 kV, 125 mA Half-wave mercury-vapor rectifier with Edison screw lamp base and anode top cap
  • DCG12/30 12 kV, 30 A Grid-controlled, half-wave mercury-vapor rectifier with anode top cap

DCX[edit]

  • DCX4/1000 4 kV, 1 kW Half-wave xenon rectifier with anode top cap
  • DCX4/5000 4 kV, 5 kW Half-wave xenon rectifier with anode top cap

DE[edit]

  • DE2/200 2 kV, 200 W Full-wave power rectifier with dual anode top cap

J - Magnetron[edit]

JP[edit]

  • JP8/02B 8.8 GHz, 25 W Magnetron
  • JP9/15 9.345 to 9.405 GHz, 15 kW Forced-air cooled magnetron for pulsed service

JPT[edit]

  • JPT9/01 9.15 to 9.60 GHz, 5 W Magnetron

K - Klystron[edit]

KB[edit]

  • KB9/150W X-band, 150 W Water-cooled, dual-resonator klystron

L - Traveling-wave tube[edit]

LA[edit]

M - AF modulator Triode[edit]

MA[edit]

  • MA4/600 4 kV, 600 W Radiation-cooled triode

MB[edit]

  • 500.100MB 100 kV, 200 W Radiation-cooled triode
  • 500.200MB 150 kV, 400 W Radiation-cooled triode

-Converted-advance,hi-digit,to MB. for t18cherry mobile

MY[edit]

  • MY3/275 3 kV, 275 W Radiation-cooled triode

MZ[edit]

  • MZ2/200 2 kV, 200 W Radiation-cooled triode

P - Pentode[edit]

PA[edit]

  • PA12/15 15 kW Water-cooled SW pentode
  • PA12/20 20 kW Water-cooled pentode made by Philips and used in the 1930s and 1940s

PAL[edit]

  • PAL12/15 Air-cooled version of PAW12/15

PAW[edit]

  • PAW12/15 15 kW Water-cooled SW Pentode

PB[edit]

  • PB2/200 200 W SW Pentode
  • PB3/1000 1 kW SW Pentode

PC[edit]

  • PC03/3 3 W SW Pentode
  • PC3/1000 1 kW SW Pentode

PE[edit]

  • PE04/10 10 W SW Pentode



  • PE1/100 (YL1200) 100 W SW Pentode

Q - Tetrode[edit]

QB[edit]

QBL[edit]

  • QBL4/800 Air-cooled 800 W beam-tetrode
  • QBL5/3500 Air-cooled 3500 W beam-tetrode

QBW[edit]

  • QBW5/3500 Water-cooled 3500 W beam-tetrode

QC[edit]

  • QC05/15 15 W Beam-tetrode
  • QC05/35 35 kW Beam-tetrode

QE[edit]

  • QE04/10 10 W Beam-tetrode
  • QE05/40 (6146) 40 W Radiation-cooled output beam-tetrode, popular amongst radio amateurs as a final RF amplifier



  • QE08/200 200 W Beam-tetrode

QEL[edit]

  • QEL1/150 Air-cooled 150 W beam-tetrode
  • QEL1/250 Air-cooled 250 W beam-tetrode

QEP[edit]

  • QEP20/18 18 W Beam-tetrode for use as a pulse modulator

QQC[edit]

  • QQC03/14 14 W Dual beam-tetrode

QQE[edit]



  • QQE02/5 (6939) 5 W Dual beam-tetrode



  • QQE03/12 (6360) 12 W Dual beam-tetrode
  • QQE03/20 (6252) 20 W Dual beam-tetrode



  • QQE04/5 (7377) 5 W Dual beam-tetrode



  • QQE06/40 (5894, YL1060) 40 W dual beam-tetrode, internally neutralized, Septar base with dual anode top cap

QQV[edit]

  • QQV02/6 6 W dual beam-tetrode
  • QQV03/20A 20 W Radiation-cooled split-anode tetrode made by Mullard and used in the 1940s, 1950s and 1960s as a VHF frequency-doubling output stage with balanced output.
  • QQV07/50 50 W Dual beam-tetrode

QQZ[edit]



  • QQZ03/20 (8118, YL1020) 20 W Dual beam-tetrode



  • QQZ06/40 (YL1030) 40 W Dual beam-tetrode

QV[edit]

  • QV04/7 7 W Beam-tetrode
  • QV05/25 (807) 25 W Radiation-cooled output beam-tetrode made by Mullard.
  • QV2/250C 250 W Beam-tetrode

QY[edit]

  • QY3/65 65 W Beam-tetrode
  • QY5/3000A 3 kW Beam-tetrode
  • QY5/3000W Water-cooled version of QY5-3000A

QYS[edit]

QZ[edit]

  • QZ06/20 25 W VHF Power tetrode up to 175 MHz

R - Rectifier[edit]

RG[edit]

RGQ[edit]

  • RGQ7.5/0.6 7.5 kV, 600 mA Half-wave mercury-vapor rectifier with anode top cap
  • RGQ20/5 20 kV, 5 A Half-wave mercury-vapor rectifier with anode top cap

T - AF/RF/oscillator Triode[edit]

TA[edit]

  • TA04/5 400 V, 50 W Radiation-cooled power triode
  • TA1.5/75 1.5 kV, 75 W Radiation-cooled power triode
  • TA4/2000K 4 kV, 2 kW Air-cooled power triode made by Philips in the 1930s
  • TA18/100000 18 kV, 100 kW Water-cooled power triode

TB[edit]

  • TB2.5/400 2.5 kV, 300 W Radiation-cooled power triode
  • TB5/2500 5 kV, 2.5 kW Radiation-cooled power triode

TBL[edit]

  • TBL2/300 2 kV, 300 W Forced air-cooled power triode
  • TBL15/125 15 kV, 125 kW Forced air-cooled power triode

TBW[edit]

  • TBW6/14 6 kV, 14 kW Water-cooled power triode
  • TBW15/125 15 kV, 125 kW Water-cooled power triode

TX[edit]

  • TX12/12W Water-cooled RF power triode
  • TX12/20W Water-cooled RF power triode
  • TX10/4000 Power triode, Silica envelope, 12 kV anode voltage, 4 kW anode dissipation, 1.6 A cathode current, gm: 4.5 mS, for use as self-excited high-power oscillator in induction heating equipment.

TY[edit]

  • TY2/125 135 W VHF power triode up to 200 MHz
  • TY12/50A Forced-air cooled 45 kW RF power triode up to 30 MHz
  • TY12/50W Water-cooled 50 kW RF power triode up to 30 MHz

TYS[edit]

  • TYS2/250 Power triode, Silica envelope, 2.5 kV anode voltage, 250 W anode dissipation
  • TYS4/500 Power triode, Silica envelope
  • TYS5/1000 Power triode, Silica envelope
  • TYS5/2000 Power triode, Silica envelope
  • TYS5/3000 Power triode, Silica envelope, 6 kV anode voltage, 950 °C anode temperature at 3.5 kW anode dissipation, 2.8 A cathode current,gm: 15 mS. Used in RF generators for induction hardening.

X - Thyratron[edit]

XGQ[edit]

  • XGQ2/6400 2 kV, 6.4 kW Mercury-vapor tetrode thyratron with anode and grid1 top caps

XR[edit]

  • XR1/1600 (5545) 1 kV, 1.6 kW Inert gas-filled triode thyratron with anode top cap
  • XR1/6400 1 kV, 6.4 kW Inert gas-filled triode thyratron with anode top cap

List of other letter tubes[edit]

A[edit]

AC/[edit]

Mazda:

ACT[edit]

Marconi-Osram:

  • ACT9 800 W Air cooled transmitting triode up to 15 MHz, with derating up to 80 MHz

B[edit]

BA[edit]

Industrial Electronics Engineers:

BG[edit]

Burroughs:

C[edit]

CH[edit]

Tung-Sol:

  • CH1027 Curristor - Four types of nitrogen-filled, radioactive constant-current tubes with a current plateau from 25 to 500 V, all-glass pigtailed, active material is 226Ra with a half-life of 1601 years, for linear capacitor charging and draining in missile and ordnance mine timing circuits, instrumentation biasing, as current reference, etc.:
    • CH1027-9 10−9 A, 18.75 μCi
    • CH1027-10 10−10 A, 1.875 μCi
    • CH1027-11 10−11 A, 187.5 nCi
    • CH1027-12 10−12 A, 18.75 nCi

CL[edit]

Ferranti:

  • CL40 and CL41 Indirectly heated, linear light source, mercury/argon-filled gas diode with primer electrode, 8-pin base, for rotating-drum FAXreceivers, film soundtrack recording, etc.
  • CL42 and CL43 Indirectly heated, low-noise linear light source, helium-filled gas diode with primer electrode, 8-pin base, for film soundtrack recording, interferometers, etc.
  • CL55 Indirectly heated, spectrally pure light source, helium-filled gas diode with primer electrode, 7-pin base with anode top cap
  • CL56 Indirectly heated, spectrally pure light source, krypton-filled gas diode with primer electrode, 7-pin base with anode top cap
  • CL57 Indirectly heated, spectrally pure light source, neon-filled gas diode with primer electrode, 7-pin base with anode top cap
  • CL58 Indirectly heated, spectrally pure light source, xenon-filled gas diode with primer electrode, 7-pin base with anode top cap
  • CL60 Indirectly heated triode CRT-type stroboscope lamp with a green A-type phosphor with <1 μs decay time and 10 kCd light output, 20 kV anode voltage, 7-pin duodecal base
  • CL61 CL60 with a blue P-type phosphor with 5 μs decay time and 16 kCd light output
  • CL62 CL60 with an UV Q-type phosphor with 100 ns decay time and 240 Cd light output
  • CL63 CL60 with a yellow-green C-type phosphor with 6 μs decay time and 24 kCd light output
  • CL64 CL60 with a yellow V-type phosphor with 5 μs decay time and 12 kCd light output
  • CL65 CL60 with a red R-type phosphor with 2 μs decay time and 14 kCd light output
  • CL66 CL60 with a white T-type phosphor with 5 μs decay time and 12 kCd light output

D[edit]

Philips:

  • D1 Early directly heated triode used in 1920s TRF and regenerative radios

DDR[edit]

Mullard:

  • DDR100 100 g max., 250 Hz max., 1-axis accelerometer double diode with elastically supported anodes, 6.3V/600mA indirect heater, fres = 1 kHz, B8G base

DZ[edit]

Cerberus:

  • DZ10 3 kHz max. Decade Counter/Selector Dekatron, 14-pin diheptal base

E[edit]

EN[edit]

Ferranti:

  • EN10 Neostron, 400 Apk Gas-filled, cold-cathode tetrode thyratron, differential trigger electrodes, 8-pin base, for use as a relay or as a reddish 700 Cd stroboscope lamp
  • EN15 80 Aavg Neon-filled, cold-cathode tetrode thyratron, differential trigger electrodes, miniature 9-pin base, for use as a stroboscope lamp
  • EN30 250 Apk Gas-filled, arc-discharge cold-cathode tetrode thyratron, differential trigger electrodes, miniature 7-pin base with anode cap, for use as a relay or as a stroboscope lamp
  • EN40 250 Apk Gas-filled, cold-cathode tetrode thyratron, differential trigger electrodes, 8-pin base, for use as a whitish stroboscope lamp with a high actinism for photographic film
  • EN55 Xenon-filled, arc-discharge cold-cathode tetrode thyratron, external (capacitive) trigger, 12-pin base, for use as a white 140 kCd stroboscope lamp
  • EN60 Gas-filled, arc-discharge cold-cathode tetrode thyratron, external (capacitive) trigger, Edison screw lamp base with anode cap, for use as a white 900 klm@10µF@800V stroboscope lamp

EST[edit]

  • EST15 Power pentode, B9 base - Ruggedized version of PL84

G[edit]

STC/Brimar:

  • G10/241E Nomotron, an unidirectional Dekatron with multi-alloy cathodes

Cerberus:

  • G11 5 mA Gas-filled, cold-cathode switching diode e.g. for relaxation oscillators, 2-pin all-glass pigtailed
  • G42 35 mApeak Gas-filled switching diode e.g. for relaxation oscillators, 2-pin all-glass pigtailed

GC[edit]

Ericsson Telephones Limited:

  • GC10/2P Neon-filled, 1 kHz Miniature decade Counter Dekatron, a gas-filled, bidirecional decade counter tube
  • GC10A Helium-filled, decade Counter Dekatron
  • GC10B Neon-filled, 4 kHz Long life, decade Counter Dekatron
    • GC10/4B 4 kHz Decade Computing Counter Dekatron with carry/borrow cathodes "0" and "9" and intermediate cathodes "3" and "5" wired to separate pins
  • GC10D 20 kHz Decade Counter Dekatron, for single-pulse operation
  • GC12/4B 4 kHz Duodecimal Counter Dekatron with carry/borrow cathodes 11 and 12 and intermediate cathodes 6 and 8 wired to separate pins

GCA[edit]

Ericsson Telephones Limited:

  • GCA10G 10 kHz max. Decade Counter Dekatron with routing guides and aux anodes to directly drive Nixie tubes, B27A base without the inner pin ring

GD[edit]

Ericsson Telephones Limited:

  • GD2V 2 kV, 16 J discharge tube, all-glass studded
  • GD75P 75 V Voltage reference, miniature 7-pin base
  • GD90M 90 V Voltage reference, miniature 7-pin base
  • GD350X 350 V Corona voltage reference, all-glass pigtailed
  • GD550W 550 V, 1.5 J Discharge tube, e.g. for power relaxation oscillators, all-glass pigtailed

GDT[edit]

Ericsson Telephones Limited:

  • GDT120M 9 mA Gas-filled cold-cathode DC triode, one starter and a separate glow diode acting as an optical primer, miniature 7-pin base

GE[edit]

Ferranti:

  • GE10 Directly heated saturated-emission diode. Acts 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

GK[edit]

Cerberus:

  • GK11 Illuminated capacitance touch switch - cold-cathode DC relay tube, external (capacitive) starter activated by touching; then the cathode glow is visible as an orange ring. 2-pin all-glass pigtailed

GN[edit]

Ferranti:

  • GN10 250 Amps pulse-current, cold-cathode tetrode thyratron. Octal base

GR[edit]

Ericsson Telephones Limited:

  • GR2G  + -  Neon-filled digital indicator tube, 18 x 18 mm characters, side-viewing
  • GR2H  + -  Neon-filled digital indicator tube, 20 x 20 mm characters, top-viewing
  • GR4G  ¼ ½ ¾ 1  Neon-filled digital indicator tube, 18 x 30 mm characters, side-viewing
  • GR7M  + - V A Ω % ~  Neon-filled digital indicator tube, 15.5 mm character height, top-viewing
  • GR10A Gas-filled digital indicator tube with a dekatron-type readout
  • GR10G  0 1 2 3 4 5 6 7 8 9  Neon-filled digital indicator tube, 16.86 x 30 mm characters, side-viewing
  • GR10H  0 1 2 3 4 5 6 7 8 9  Neon-filled digital indicator tube, 12 x 19 mm characters, top-viewing
  • GR10J  0 1 2 3 4 5 6 7 8 9  Neon-filled digital indicator tube, 16.86 x 30 mm characters, side-viewing
  • GR10K  0 1 2 3 4 5 6 7 8 9  Neon-filled digital indicator tube, 12 x 19 mm characters, top-viewing
  • GR10M  0 1 2 3 4 5 6 7 8 9  Neon-filled digital indicator tube, 10 x 15.5 mm characters, top-viewing
  • GR10W  0 1 2 3 4 5 6 7 8 9  Neon-filled digital indicator tube, 8.42 x 15 mm characters, side-viewing, all-glass pigtailed
  • GR12G  A B C D E F G H I J K L  Neon-filled digital indicator tube, 16 x 30 mm characters, side-viewing
  • GR12H  E L M N P R S T U V W X  Neon-filled digital indicator tube, 16 x 30 mm characters, side-viewing

Note: More Nixie tubes under standard - ZM and professional - ZM

Cerberus:

  • GR15 15 mA Gas-filled cold-cathode DC tetrode, one starter and one electrical primer and tritium-primed (half-life: 12.32 years), noval base, for voltage triggers, RC timers etc.
  • GR16 20 mA Gas-filled, cold-cathode, tritium-primed AC/DC triode, one starter and an EM shield, noval base, for voltage triggers, RC timers etc.
  • GR17 15 mA Gas-filled cold-cathode AC triode, one starter and an EM shield, noval base, for voltage triggers, RC timers etc.
  • GR31 15 mA Gas-filled cold-cathode DC tetrode, one starter and one electrical primer plus a tritium primer, noval base
  • GR44 12 mA Subminiature gas-filled cold-cathode DC pentode, two starters and one primer electrode plus a tritium primer, 5-pin all-glass pigtailed
  • GR46 12 mA Subminiature gas-filled cold-cathode DC tetrode, one starter and one primer electrode, 4-pin all-glass pigtailed

GRD[edit]

Ferranti:

  • GRD7 Educational, directly heated saturated-emission guard ring diode

GS[edit]

Ericsson Telephones Limited:

  • GS10C 4 kHz max. Decade Counter/Selector Dekatron, top-viewing, duodecal base
  • GS10D Hydrogen-filled, 20 kHz max. Decade Counter/Selector Dekatron, duodecal base
  • GS10H 4 kHz max. Decade Counter/Selector Dekatron with routing guides, B17A base
  • GS12C 4 kHz max. Duodecimal Counter/Selector Dekatron, with solder lugs
  • GS12D Neon-filled, 4 kHz max. duodecimal Counter/Selector Dekatron, duodecal base with two additional pigtails for the guide electrodes

GSA[edit]

Ericsson Telephones Limited:

  • GSA10G 10 kHz max. Decade Counter/Selector Dekatron with routing guides and aux anodes to directly drive Nixie tubes, B27A base

GTE[edit]

Ericsson Telephones Limited:

  • GTE120Y 5 mA Subminiature DC trigger tetrode, one starter and one primer, all-glass pigtailed
  • GTE130T 8 mApeak DC trigger tetrode, one starter and one primer, close tolerance, low aging, quadrant I operation only, noval base
  • GTE175M 3.5 mAavg, 50 mApeak DC Trigger tetrode, one starter and one primer, miniature 7-pin base, for Dekatron coupling circuits

GTR[edit]

Ericsson Telephones Limited:

  • GTR120W 9 mA Subminiature DC trigger triode, 3-pin all-glass pigtailed, for computer applications
  • GTR75M 75 V Voltage reference, Miniature 7-pin
  • GTR95M/S 95 V Voltage reference, Miniature 7-pin
  • GTR150 Subminiature, primed 150 V voltage reference, all-glass pigtailed

H[edit]

HD[edit]

  • HD94/6BQ6GTA/6BQ6GTB/6CU6: TV horizontal output beam power pentode. Octal with anode at top cap
  • HD96/25BQ6GTB/25CU6: TV horizontal output beam power pentode. Octal with anode at top cap

K[edit]

KN[edit]

KN2 KrytronTube
 
KN2 Krytron

Edgerton, Germeshausen, and Grier:

  • KN2 4 kV, 500 Asurge Krytron, a cold-cathode gas-filled tube with primer electrode, for use as a very high-speed switch; similar to a thyratron, 4-pin all-glass pigtailed
  • KN6B 8 kV, 3 kAsurge Krytron with primer electrode, 4-pin all-glass pigtailed
  • KN22 5 kV, 100 Asurge Krytron with primer electrode, 4-pin all-glass pigtailed

KT[edit]

Marconi-Osram Kinkless Tetrode beam power tubes

  • KT32 (25L6, 25L6G, 25L6GT and 25W6GT)
  • KT33 (25A6GT)
  • KT41
  • KT61 (6M6G) in parallel filament circuits
  • KT63 (6F6, 6F6G, 6F6GT)
  • KT66 (6L6GC)
  • KT67 small transmitting valve
  • KT71 (50L6GT)
  • KT77 Similar to EL346CA7
  • KT81
  • KT88 (6550A, CV5220, 12E13, 7D11)
  • KT90
  • KT120 New production tube by Tung-Sol
  • KT150 New production tube by Tung-Sol

M[edit]

M8000s[edit]

Mullard:

  • M8083 = EF91 = 6AM6 = Z77 Sharp-cutoff pentode, miniature 7-pin base
  • M8162 = ECC81 = 12AT7 = 6060 = B309 High-mu dual triode, for use as RF amplifier/mixer in VHF circuits, noval base

ME[edit]

Mazda :

P[edit]

PBG[edit]

Dale:

  • PBG12201 Neon-filled, planar, dual 200-segment linear glow-transfer bar graph display tube with three cathode strings,[61] for use in VU meters etc.; cf. BG08220-K
  • PBG12203 Neon-filled, planar, dual 201-segment linear glow-transfer bar graph display tube with three cathode strings, for use in VU meters etc.
  • PBG12205 Neon-filled, planar, dual 200-segment linear glow-transfer bar graph display tube with five cathode strings, for use in VU meters etc.
  • PBG16101 Neon-filled, planar, dual 101-segment linear glow-transfer bar graph display tube with three cathode strings, for use in VU meters etc.; similar to ИН-33

PD[edit]

Mazda:

  • PD220 Dual AF power triode for battery-supplied equipment (1939)

PL[edit]

Philips:

  • PL21 = 2D21 = EN91 100 mAavg, 500 mApeak, 10 Asurge, Gas-filled, indirectly heated tetrode thyratron, negative starter voltage, miniature 7-pin base, for relay and grid-controlled rectifier service
  • PL323 = 3C23 1.5 Aavg, 6 Apeak, Mercury-vapor triode thyratron, 4-pin base with anode top cap
  • PL5727 = 5727 100 mAavg, 500 mApeak, 10 Asurge, Tetrode thyratron, 7-pin miniature base

Q[edit]

QK[edit]

Raytheon:

  • QK329 Beam-deflection square-law tube for use as a function generator in analog computers. A flat sheet beam is deflected across the anode which is partially covered by a parabolically stenciled screen "grid" that acts as the tube's output. Two tubes may be combined to form a 1-quadrant analog multiplier using the equation ab = (a+b)2 − (ab)2/4 where the deflection electrode signals a+b and ab can be obtained directly from a fully balanced resistor bridge[62]

R[edit]

  • R Early directly heated triode used by many amateurs in the 1920s

S[edit]

SU[edit]

Cossor:

  • SU2150 (CV1120) High-voltage vacuum half-wave rectifier for use in CRT power supplies

SY[edit]

Standard Telephones and Cables:

  • SY4307A Power pentode similar to the output beam-tetrode type 807. It differs from an 807 by being a directly heated pentode rather than an indirectly heated beam-tetrode. Both types are contained in an ST-16 bulb with an anode cap and 5-pin "American" UY base
This device is historically notable because a pair of them in parallel class C was used as the output stage in a transmitter built in secret by Australian soldiers in Japanese-occupied Portuguese Timor during World-War II in 1942. This transmitter, now reconstructed and on display at the Australian War Memorial in Canberra, was called "Winnie the War Winner".

T[edit]

TT[edit]

Bendix:

Marconi-Osram:

  • TT11 Low power VHF transmitting beam tetrode
  • TT21 RF power beam-tetrode derived from KT88
  • TT100 RF power beam-tetrode

V[edit]

VHT[edit]

Ferranti:

VS[edit]

Ericsson Telephones Limited:

  • VS10G Trochotron, an electron-beam decade counter tube
  • VS10G-M VS10G with a magnetic shield
  • VS10H High-current trochotron
  • VS10K Low-voltage trochotron

List of other number tubes[edit]

1[edit]

1600s[edit]

  • 1602 Directly heated triode used for A.F.amplification with low microphonics. 7.5 volt heater/filament. 12 watts of A.F. operating in class A. 15 watts of low R.F. operating in class C. Similar to type 10.
  • 1603 Indirectly heated pentode used for A.F. amplification with low microphonics. Similar to types 6U7, 57, 6D6 and 6C6. UX6 Base.
  • 1608 Directly heated triode giving 20 watts at up to 45 MHz. 2.5 volt heater/filament. UX base.
  • 1609 Directly heated pentode used for A.F. amplification with low microphonics. American 5-Pin(UY)base.
  • 1610 Directly heated pentode specially designed for use as a crystal oscillator. 2.5 volt heater/filament, American 5-Pin base.
  • 1612 Pentagrid converter; low-microphonics version of type 6L7. Both control grids (1 and 3) are sharp-cutoff.
  • 1619 Beam Power Tetrode, similar to 6L6 with directly heated filament, common in WW2 battle tank transmitters.
  • 16241625 very similar to the 807, but with different heater voltage
  • 1626 RF triode, very similar to 6J5 but with 12.6 volt filament
  • 1629 Tuning indicator tube with DC amplifier triode unit
  • 1630 Indirectly heated, orbital-beam, secondary-emission, 12-pin Acorn-type UHF hexode
  • 1633 Dual triode, equivalent to 6SN7 with 26 volt filament (WW2 aircraft use)
  • 1635 Indirectly heated, 10.4 W dual AF power triode, 8-pin base

2[edit]

  • 24B1 Trigatron
  • 24B9 Trigatron
  • 29C1 Directly heated saturated-emission diode; acts as a heating current-controlled, variable series resistor in voltage/current stabilizer circuits.

200s[edit]

  • 203A 40 W, Directly heated RF transmitter power triode, 4-pin base, anode on top cap
  • 204A 450 W, Directly heated RF transmitter power triode, 3-pin base, anode on top cap
  • 205D 1 W, Directly heated AF or modulator power triode, 4-pin base
  • 207 22.5 kW, Water-cooled, directly heated RF transmitter power triode
  • 210T Directly heated RF transmitter power triode, 4-pin base, similar to type 10 triode with an isolantite base
  • 210DET Cossor directly heated, 2 volts, special detector
  • 210HF Cossor, directly heated, 2 volts, triode
  • 210HL Cossor, directly heated, 2 volts, triode
  • 210LF Cossor, directly heated, 2 volts, triode
  • 210PG Cossor, directly heated, 2 volts, variable-mu pentagrid
  • 210RC Cossor, directly heated, 2 volts, very high impedance triode
  • 210SPT Cossor, directly heated, 2 volts, HF pentode
  • 210VPT Cossor, directly heated, 2 volts, HF variable-mu shielded pentode
  • 211 260 W, Directly heated AF or modulator power triode now favored by audiophiles; 4-pin base
  • 212E 250 W, Directly heated RF transmitter power triode, 4-pin base
  • 215P Directly heated AF power triode
  • 220B 5 kW, Water-cooled, directly heated AF/modulator power triode
  • 228 2.5 kW, Directly heated RF/AF power triode
  • 230XP Directly heated power triode
  • 232C 8.5 kW, Water-cooled, directly heated RF transmitter power triode
  • 236A 12 kW, Water-cooled, directly heated RF transmitter power triode
  • 240B Directly heated dual AF power triode
  • 241B 300 W, Directly heated AF/modulator power triode, 3-pin base, anode on top cap
  • 242A Directly heated AF/modulator power triode, 4-pin base
  • 250TH 1.1 kW, Directly heated AF/modulator power triode, 4-pin base, anode on top cap
  • 254A 14 W, Directly heated RF transmitter power triode, 4-pin base, anode on top cap
  • 261A 170 W, Directly heated AF/modulator power triode, 4-pin base
  • 268A 20 W, Directly heated power triode, 4-pin base, anode on top cap
  • 270A 585 W, Directly heated AF/RF power triode, 4-pin base, anode on top cap
  • 275A 3 W, Directly heated AF power triode, 4-pin base
  • 276A 170 W, Directly heated AF/RF power triode, 4-pin base
  • 279A 1.75 kW, Directly heated AF/RF power triode
  • 295A 125 W, Directly heated AF/RF power triode, 4-pin base
  • 298A 5 kW, Water-cooled, directly heated power triode

3[edit]

  • 300B 40 watt directly heated power triode, 4-pin base

4[edit]

  • 4XP Directly heated power triode
  • 41MP Indirectly heated power triode
  • 45 (CX345) Directly heated power triode
  • 402P Indirectly heated power triode, 7-pin base




7[edit]

  • 7JP1 Monochrome cathode ray tube for use in early postwar oscilloscopes. Electrostatic deflection, P1 green, short-persistence phosphor, 7" screen.
  • 7JP4 Monochrome cathode ray tube common in early postwar TV receivers. Electrostatic deflection, P4 white, medium-persistence phosphor, 7" screen.
  • 7JP7 Monochrome cathode ray tube for use in early postwar radar displays. Electrostatic deflection, P7 blue-white, long-persistence phosphor, 5½" screen.

8[edit]

800s[edit]

  • 800 Directly heated V.H.F. power triode, giving 35 watts up to 60 MHz and 18 watts at 180 MHz. American 4-Pin(UX)base with side locating pin.
  • 801Directly heated power triode, used in pairs in class B in A.M. modulation sections of transmitters giving up to 45 watts of power at 60 MHz and 22 watts at 120 MHz.
  • 802 Indirectly heated H.F. power pentode, giving 8 watts up to 30 MHz and 4 watts at 110 MHz.
  • 803 Directly heated H.F. power pentode, giving 50 watts up to 20 MHz and 25 watts at 70 MHz.
  • 804 Directly heated H.F. power pentode, giving 20 watts up to 15 MHz and 10 watts at 10 MHz.
  • 805 Directly heated H.F. high-mu triode, giving 140 watts up to 30 MHz and 70 watts at 85 MHz..
  • 806 Directly heated H.F. high-mu triode, giving 390 watts up to 30 MHz 195 watts at 100 MHz.
  • 807 Indirectly heated H.F. beam power tetrode, giving 25 watts up to 30 MHz and 12 watts at 125 MHz. A variation of type 6L6 originally designed as a Class C transmitter tube. Later used in pairs as push-pull outputs for high-wattage Class AB2 audio amplifiers. Also used as a horizontal output tube in early television receivers. One of the first commercial tubes that used the top cap to connect the plate (instead of the control grid) to the circuit.
  • 808 Directly heated H.F. high-mu triode, giving 140 watts up to 30 MHz and 70 watts at 130 MHz.
  • 809 Directly heated H.F. high-mu triode, giving 55 watts up to 27 MHz and 30 watts at 100 MHz.
  • 810 Directly heated H.F. triode, 10 volt filament and Zirconium Carbide anode. Base fits R.C.A. UT-541A Socket.
  • 811A Directly heated H.F. triode, 6.3 volt filament, 88 watts
  • 813 Beam Power Tetrode possessing about 5 times the Anode dissipation of an 807.
  • 814 A directly heated Beam Power Tetrode giving about 130 watts at 30 MHz and 65 watts at 100 MHz operating in class C.
  • 815 An indirectly heated dual Pentode. International Octal, (IO), base.
  • 829 A dual indirectly heated beam power tetrode. Two 6.3 volt heaters sharing a common tap.
  • 830 A directly heated triode giving about 50 watts at 15 MHz and 7.5 watts at 60 MHz operating in class C.
  • 831 A directly heated triode giving about 400 watts at 20 MHz and 200 watts at 60 MHz operating in class C. 11 volt heater/filament.
  • 833 A larger directly heated high-mu triode giving about 1 kW at 30 MHz and 500 watts at 45 MHz operating in class C. Usable up to 100 MHz at reduced power, (400 W). 10 volt heater/filament drawing 10 A. The anode/Plate of this device is fabricated from tantalum. Plate current of 800 mA with a plate voltage of 3 kV and grid voltage of zero. Plate current of 4.3 A at a voltage of 750 with 350 volt on the grid. Superseded by the 833A. Uses two-part R.C.A socket assembly UT-103.[63]
  • 833A A larger directly heated high-mu triode giving about 1 kW at 30 MHz and 500 watts at 45 MHz and 400 watts at 100 MHz operating in class C. 10 volt heater/filament drawing 10 A. The anode/Plate of this device is fabricated from tantalum.
  • 834 A directly heated triode giving 58 watts at 100 MHz and 25 watts at 350 MHz operating in class C. 7.5 volt heater/filament. Fitted with an American 4-Pin, (UX4), base with side locating pin.
  • 836 An indirectly heated high vacuum rectifier with a peak inverse voltage of 5 kV and peak anode current of 1 ampere. 2.5 volt heater.
  • 837 An indirectly heated pentode giving 11 watts at 20 MHz and 5 watts at 80 MHz. operating in class C. 12.6 volt heater.
  • 838 A directly heated triode giving about 100 watts at 30 MHz operating in class C. 10 volt heater/filament.
  • 841 A directly heated high-mu triode giving about 10 watts at 6 MHz and 5 watts at 170 MHz operating in class C. 7.5 volt heater/filament.
  • 842 A directly heated triode giving about 3 watts at 6 MHz operating in class C. 7.5 volt heater/filament.
  • 843 An indirectly heated tetrode giving gain at 6 MHz and usable up to 200 MHz operating in class C. 2.5 volt heater/filament.
  • 844 A directly heated triode giving gain at 6 MHz and usable up to 155 MHz operating in class C. 2.5 volt heater/filament.
  • 845 A directly heated triode giving up to 24 watts if undistorted power in class-A at audio frequency with an anode voltage of 1250. 11 volt heater/filament.
  • 849 A directly heated triode giving gain at 3 MHz operating in class C. Two 849s, working in push-pull class B are capable of delivering 1.1 kW of audio output with an anode voltage of 3 kV. Usable up to 30 MHz. 11 volt filament/heater.
  • 850 A directly heated tetrode giving 120 watts of power gain up to 13 MHz and 50 watts at 100 MHz, operating in class C. 10 volt heater/filament.
  • 851 A directly heated triode giving 1.5 kW of power up to 3 MHz operating in class C. 11 volt heater/filament.
  • 852 A directly heated triode giving 75 W of power up to 30 MHz operating in class C. 10 volt heater/filament.
  • 857B Large mercury-vapor rectifier used in 50 kW class broadcast transmitters. 22 kV anode voltage, 10 A anode current. Filament 5 V @ 30 A
  • 860 A directly heated tetrode giving 105 W of power up to 30 MHz and 50 watts at 120 MHz operating in class C. 10 volt heater/filament.
  • 861 A directly heated triode giving 400 W of power up to 20 MHz and 200 watts at 60 MHz operating in class C. 11 volt heater/filament.
  • 862 Large water-cooled triode for broadcast/industrial applications. Used in experimental 500 kW transmitter at WLW.
  • 864 A directly heated general-purpose, low-microphonics triode with a maximum anode voltage of 135 and anode current of 3.5 mA. 1.1 volt heater/filament.
  • 865 A directly heated tetrode giving 30 W of power up to 15 MHz 15 watts at 70 MHz operating in class C. 11 volt heater/filament.
866A
 
866A
  • 866 A mercury-vapor rectifier with a peak inverse voltage of 5 kV and peak anode current of 1 ampere. Average anode current, 250 mA, forward drop, 15 volt. Heater voltage and current, 2.5 at 5 A. American 4-Pin(UX) base. Superseded by 866A
  • 866A A mercury-vapor rectifier with a peak inverse voltage of 10 kV and peak anode current of 1 ampere. Average anode current, 250 mA, forward drop, 10 volt. Heater voltage and current, 2.5 at 5 A. American 4-Pin (UX) base.



  • 872 A mercury-vapor rectifier with a peak inverse voltage of 5 kV and peak anode current of 5 amperes. Average anode current, 1250 mA, forward drop, 15 volt. Heater voltage, 5.0 at 10 A. Base fits R.C.A. UT-541A Socket.
  • 872A A mercury-vapor rectifier with a peak inverse voltage of 10 kV and peak anode current of 5 amperes. Average anode current, 1250 mA, forward drop, 10 volt. Heater voltage, 5.0 at 6.25 A. Base fits R.C.A. UT-541A Socket.
  • 879 A high vacuum rectifier with a peak inverse voltage of ca. 15 kV and peak anode current of ca. 5 mA. 2.5 volt heater and American 4-Pin, (UX) base. Used as half wave rectifier for high voltage cathode ray tube supplies. Similar to type 2X2.
  • 884 An indirectly heated triode thyratron. 6.3 volt heater/filament, International Octal, (IO), base. Electrically similar to type 885. Once commonly used as a sawtooth horizontal sweep waveform generator in recurrent-sweep oscilloscopes. Marketed by DuMont under the type number 6Q5.
  • 885 An indirectly heated triode thyratron. 2.5 volt heater/filament, American 5-Pin (UY) base. Otherwise similar to type 884.
  • 898 Large water-cooled triode for broadcast/industrial applications. Updated version of 862, with 3 phase filament structure.

9[edit]

900s[edit]

  • 934 Vacuum Phototube, spectral S4 response (maximum sensitivity at 400±50 nm), 3-pin Small-Shell Peewee base
  • 935 Vacuum Phototube, spectral S5 response (maximum sensitivity at 340±50 nm), 4-pin octal base
  • 954 Indirectly heated Acorn-type sharp cutoff pentode giving gains of 2-3 up to 300 MHz operating in class A and usable up to 600 MHz with careful stage design. 6.3 volt heater/filament.
  • 955 Indirectly heated Acorn-type triode giving a power of 135 mW up to 600 MHz operating in class A and 500 mW in class C with careful stage design. 6.3 volt heater/filament.
  • 956 Indirectly heated Acorn-type remote cutoff pentode giving gains of 3-4 up to 600 MHz operating in class A with careful stage design. 6.3 volt heater/filament.
  • 991 60-Volts Voltage reference, T4½ lightbulb with dual-contact, bayonet candelabra mount

List of tubes used in 1920s and 1930s radio receivers[edit]

Tubes with directly heated cathodes[edit]

Used with AC, DC or home-based storage battery power supplies (1927–1931)

With 1.1 Volt DC filaments[edit]

Used in 1920s home radios. Filaments powered by 1.5 volt dry cells, plates powered by storage batteries.

With 2.0 Volts DC filaments[edit]

Used in 1930s home radios powered by storage batteries.

  • 19 Dual power triode—also used in farm radios with 6-volt vibrator power supplies. Earlier version of octal type 1J6-G.
  • 20 Power triode - Early versions numbered UX-120.
  • 22 Sharp-cutoff tetrode - Early versions numbered UX-222 or CX-322.
  • 25S Dual detector diode, medium-mu triode. Identical to type 1B5. Usually numbered 1B5/25S.
  • 30 Medium-mu triode - Early versions numbered RCA-230 or CX-330. Can also be used as a power triode. An upgraded version of type 01-A. Popular amongst amateurs
  • 31 Power triode, 4-pin base - Early versions numbered RCA-231 or CX-331.
  • 32 Sharp-cutoff tetrode - Early versions numbered RCA-232 or CX-332.
  • 33 Power pentode - Early versions numbered RCA-233 or C-333.
  • 34 Remote-cutoff tetrode - Early versions numbered RCA-234 or CX-334.
  • 49 Dual-grid power triode, similar to type 46

With 3.3 Volts DC filaments[edit]

Used in 1920s home radios powered by dry cells (filaments) and storage batteries (B-plus voltage).

  • V99 Low-mu triode. Except for stub-pin bayonet base and pinout, electronically similar to X99
  • X99 Similar to V99, but with standard pins and different basing arrangement

With 5.0 Volts DC filaments[edit]

Used in 1920s home radios powered by storage batteries.

  • 00-A Detector triode with a trace of argon. "00-A" is the number used in most tube manuals. Numbers for earlier versions include UX-200-Aand CX-300-A (long pins, push-in socket) and UV-200-A (stub pins, bayonet socket).
  • 01-A All-purpose low-mu triode, used as RF amplifier, detector, AF amplifier and power triode. The most popular tube of the 1920s. "01-A" is the number used for replacements manufactured after 1930 and in tube manuals. Numbers for early versions include UX-201-A and CX-301-A (long pins, push in socket) and UV-201-A (stub pins, bayonet socket).
Note: There were four tubes in the "01" series, each with different current ratings for their filaments. Type 01-A was the most commonly used.
Types UV 201 and UX 201 - 1.0 ampere
Type 01-A (UV 201-AUX 201-A, etc.) - 250 milliampere
Type UX 201-B - 125 milliampere
Type UX 201-C - 60 milliampere
  • 12-A Medium-mu triode, often used as detector, audio driver or audio output, but not as an RF amplifier - "12-A" is number used for replacements manufactured after 1930 and in tube manuals. Also referred to as 112-A. Many early versions are marked UX-112-A or CX-112-A.
  • 40 Medium-mu triode - Early versions numbered UX-240. Introduced in 1927, this was an upgraded version of the "01" series. The "01" series had an amplification factor of 8, while type 40 had an amplification factor of 30. (By comparison, the two AC triodes introduced in the same time period—types 26 and 27—had amplification factors of 8.3 and 9, respectively.) Because this was the highest-amplification triode available, advertising literature of the time lists it as a high-mu triode, although it is now classified as a medium-mu triode. Type 40 had the highest amplification factor of any triode until the introduction in 1932 of diode/triode complex type 2A6, which had an amplification factor of 100. It also had the highest amplification factor of any DC filament triode until the introduction in 1939 of complementary diode/triode complex types 1H5GT (octal) and 1LH4 (loctal), which both had amplification factors of 65.

Other directly DC-heated tubes[edit]

  • 2HF Tube-based "integrated circuit" with 2 tetrodes and passive components in the same envelope
  • 3NF Tube-based "integrated circuit" with 3 triodes and passive components in the same envelope. 4V heater
  • WG38 Tube-based "integrated circuit" with 2 pentodes, a triode and passive components in the same envelope

Directly AC-heated power tubes[edit]

  • 10 Power triode - Early versions numbered UX-210 or CX-310.
  • 26 Medium-mu triode, used in early AC radio receivers manufactured in the late 1920s - Early versions numbered UX-226 or CX-326.
  • 45 Power Triode - Early versions numbered UX-245 or CX-345.
  • 46 Dual grid power triode - Grids 1 and 2 connected together for use as push-pull Class B outputs, Grid 2 and plate connected together for use as single-tube audio driver.
  • 47 Power pentode - Early versions numbered RCA-247 or C-347.
  • 50 Power triode - Early versions numbered UX-250 or CX-350.
  • 71-A Power triode - A type 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.

Directly AC-heated rectifier tubes[edit]

  • 80 Full-wave rectifier used in early power supplies or battery eliminators (electronically similar to 5Y3G) - Early versions numbered UX-280 orCX-380
  • 81 Half-wave rectifier - Early versions numbered UX-281 or CX-381.
  • 82 Full-wave mercury-vapor rectifier
  • 83 Full-wave mercury-vapor rectifier
  • 83-v High-vacuum version of type 83, earlier UX4 based version of octal type 5V4-G.

Tubes with indirectly heated cathodes[edit]

With DC heaters[edit]

  • 15 Sharp-cutoff pentode, used in farm radios, in autodyne circuits requiring a separate cathode.
  • 48 Power tetrode, used in 32-volt farm radios. When two are parallel-connected, they can operate with plate and screen voltages as low as 28 volt.

For use with an AC heating transformer[edit]

Note: All have 2.5 volt heaters.

  • 24 Sharp-cutoff tetrode - Early versions numbered UY-224 and C-324
  • 24-A an upgraded version of type 24 - Early versions numbered UY-224A and C-324A
  • 27 Medium-mu triode - Early versions numbered UY-227 and C-327. The first North American tube with an indirectly heated cathode, which is necessary for detector circuits in AC powered tube radios.
  • 35 Remote-cutoff tetrode (Commonly branded as 35/51) - Early versions numbered UY-235 or C-335
  • 51 Similar to 35, see type 35 above. (Commonly branded as 35/51)
  • 53 Dual power triodes (Except for heater, electronically similar to 6A6 and 6N7)
  • 55 Dual-diode, medium-mu triode (Except for heater, electronically similar to type 85)
  • 56 Medium-mu triode (Except for heater, electronically similar to 76)
  • 57 Sharp-cutoff pentode used in cabinet and mantel radio receivers (except for heater, electronically similar to 6C6 and octal based 6J7, but not to 77)
  • 58 Remote-cutoff pentode (Except for heater, electronically similar to 6D6 and octal based 6U7G, but not to 78)
  • 59 Power pentode, UX7 based.

For use with AC/DC or vehicle-based storage-battery power supplies[edit]

Note: All have 6.3 volt heaters except type 43

  • 1-V Half-wave rectifier, UX4 base, often branded as type 1V/6Z3 - Early version KR-1.
  • 36 Sharp-cutoff tetrode - Early versions numbered RCA-236 or C-336
  • 37 Medium-mu triode - Early versions numbered RCA-237 or C-337
  • 38 Power pentode - Early versions numbered RCA-238
  • 39 Remote-cutoff pentode (Commonly branded as 39/44).
  • 41 Power pentode, earlier UX6 base version of octal type 6K6-G, and loctal type 7B5.
  • 42 Power pentode, earlier UX6 base version of octal type 6F6-G, Except for heater, similar to types 2A5 and 18.
  • 43 Power pentode, earlier UX6 base version of octal type 25A6-G.
  • 44 Similar to type 39, see type 39 above. (Commonly branded as 39/44).
  • 75 Dual-diode, high-mu triode. Earlier UX6 base version of octal types 6B6-G and 6SQ7, and 7-pin miniature type 6AV6.
  • 76 Medium-mu triode, earlier UX5 base version of octal type 6P5GT.
  • 77 Sharp-cutoff pentode, earlier UX6 base version of octal type 6J7.
  • 78 Remote-cutoff pentode, earlier UX6 base version of octal type 6K7.
  • 79 Twin power triode, earlier UX6 base version of octal type 6Y7-G.
  • 84 Full-wave rectifier with indirectly heated cathode, often branded as type 84/6Z4. Earlier UX5 base version of octal type 6X5-GT, 7-pin miniature 6X4, and loctal 7Y4.
  • 85 Dual-diode, medium-mu triode. Earlier UX6 base version of octal type 6V7G, similar to types 55 and octal type 6SR7 and miniature types6BF6.
  • 89 Power pentode, UX6 based.

Shielded tubes for Majestic radios[edit]

In the early 1930s, the Grigsby-Grunow Company—makers of Majestic brand radios—introduced the first American-made tubes to incorporate metal shields. These tubes had metal particles sprayed onto the glass envelope, copying a design common to European tubes of the time. Early types were shielded versions of tube types already in use. (The shield was connected to the cathode.) The Majestic numbers of these tube types, which are usually etched on the tube's base, have a "G" prefix (for Grigsby-Grunow) and an "S" suffix (for shielded). Later types incorporated an extra pin in the base so that the shield could be connected directly to the chassis.

Replacement versions from other manufacturers, such as Sylvania or General Electric, tend to incorporate the less expensive, form-fitting Goat brand shields that are cemented to the glass envelope.

Grigsby-Grunow did not shield rectifier tubes (except for type 6Y5 listed below) or power output tubes.

  • Early types based on existing tubes. (Non-shielded versions may be used, but add-on shielding is recommended.)
    • G-2A7-S Pentagrid converter
    • G-2B7-S Semiremote-cutoff pentode, dual detector diode
    • G-6A7-S Pentagrid converter
    • G-6B7-S Semiremote cutoff pentode, dual detector diode
    • G-6F7-S Remote cutoff pentode, medium-mu triode
    • G-25-S Medium-mu triode, dual detector diode for 2.0 volt storage battery radios. Glass type 1B5/25S used for replacement.
    • G-51-S Remote cutoff tetrode
    • G-55-S Medium-mu triode, dual detector diode
    • G-56-S Medium-mu triode
    • G-56A-S Medium-mu triode, original version of type 76, but with 400 milliampere heater. (Not to be confused with types 56 or G-56-S, which has a 2.5 volt, 1.0 ampere heater.)
    • G-57-S Sharp cutoff pentode
    • G-57A-S Sharp-cutoff pentode, original version of type 6C6, but with 400 milliampere heater. (Not to be confused with types 57 or G-57-S, which has a 2.5 volt, 1.0 ampere heater.)
    • G-58-S Remote cutoff pentode
    • G-58A-S Remote-cutoff pentode, original version of type 6D6, but with 400 milliampere heater. (Not to be confused with types 58 or G-58-S, which has a 2.5 volt, 1.0 ampere heater.)
    • G-85-S Similar to G-55-S, but with 6.3 volt heater.
  • Later types
    • 6C7 Medium-mu triode, dual detector diode, similar to later octal types 6R7 and 6SR7. Seven pin base. (Shield to pin 3.)
    • 6D7 Sharp cutoff pentode, identical to type 6C6, but with 7-pin base. (Shield to pin 5.)
    • 6E7 Remote cutoff pentode, identical to type 6D6, but with 7-pin base. (Shield to pin 5.)
    • 6Y5 Dual rectifier diode, similar to type 84/6Z4, but with 6-pin base. (Shield to pin 2.)
  • Other tubes unique to Majestic radios
    • G-2-S and G-4-S Dual detector diodes with common cathodes. The first detector diodes packaged in a separate tube. Forerunners of octal type 6H6. Spray-shielded. Both tubes have 2.5 volt heaters. G-2-S is larger and has a 1.75 ampere heater. Type G-4-S has a 1.0 ampere heater. Later Sylvania replacement type 2S/4S has a 1.35 ampere heater.
    • 2Z2/G-84 Half-wave rectifier diode with 2.5 volt indirectly heated cathode. A lower-voltage version of type 81. Not interchangeable with type 6Z4/84.
    • 6Z5 Full-wave rectifier, similar to types 6Z4/84 and 6X5, but with 12.6 volt center-tapped heater.

Lettered loctal tubes used in Philco radios[edit]

  • FM-1000 Unusual pentagrid for use as oscillator and coincidence-type phase detector in a PLL FM quadrature detector. The anode signal is loosely coupled into the oscillator tank and pulls it to stay quadrature-phase-locked with the IF; manufactured by Sylvania and used inPhilco AM/FM radios of the late 1940s and early 1950s. Predecessor of the nonode approach
  • XXB Medium-mu twin triode, also numbered 3C6/XXB
  • XXD Medium-mu twin triode, also numbered 14AF7/XXD
  • XXFM High-mu triode, dual diode (one shares its cathode with the triode, one with separate cathode), also numbered 7X7/XXFM
  • XXL Medium-mu triode, also numbered 7A4/XXL

Rarely used tubes[edit]

  • 14 Similar to 24-A but with a 14 volt, 300 milliampere heater. Used in Philco models 46 and 46E
  • 17 Similar to 27 but with a 14 volt, 300 milliampere heater. Used in Philco models 46 and 46E
  • 18 Similar to 2A5 and 42 but with a 14 volt, 300 milliampere heater. No known commercial use.
  • 29 Wunderlich detector. Known to have been manufactured by Sylvania.
  • 52 Dual grid power triode similar to types 46 and 49. Has 6.3 volt filament. Most commonly used in early car radios.
  • 64 Sharp-cutoff tetrode (Except for 400 milliampere heater, similar to 36)
  • 65 Remote-cutoff pentode (Except for 400 milliampere heater, similar to 39)
  • 67 Medium-mu triode (Except for 400 milliampere heater, similar 37)
  • 68 Power pentode (Except for 400 milliampere heater, similar to 38)
  • 69 Wunderlich detector
  • 70 Wunderlich detector used in Mission Bell model 19 car radio. Listed in early Philco tube lists.
  • 90 Wunderlich detector
  • 92 Wunderlich detector
  • 95 Original number of type 2A5
  • 181 Power triode
  • 182-B Similar to 482-B below.
  • 183 Similar to 483 below.
  • 213 Early version of type 80 - Often numbered UX-213
  • 216 Early version of type 81 - Often numbered as UX-216-B
  • 482-B Power triode with directly heated cathode. Used in Sparton AC radios, circa 1929. Replacements often numbered 182-B/482-B. Similar to type 71-A, but with higher plate voltage.
  • 483 Power triode with directly heated cathode. Used in Sparton AC radios, circa 1929. Replacements often numbered 183/483. Similar to type 45, but with a 5.0 volt, 1.25 ampere heater.
  • 485 Medium-mu triode with indirectly heated cathode. Used in Sparton AC radios, circa 1929. Similar to types 56 and 76, but with a 3.0 volt, 1.25 ampere heater, and lower plate voltage.
  • 950 Power pentode with directly heated cathode, used in storage battery home radios with 2.0 volt filament supply. Similar to type 1F4.
  • 951 Sharp-cutoff pentode with directly heated cathode, used in storage battery home radios with 2.0 volt filament supply. Similar to type 1B4-P.

Russian tubes[edit]

List of standard tubes, with American equivalents[edit]

Note: Typecode explained above.

  • 6N1P 6Н1П Dual triode, similar to 6DJ8/ECC88
  • 6N2P 6Н2П Dual triode, similar to 12AX7/ECC83
  • 6N3P 6Н3П (2C51) Dual triode
  • 6N8S 6Н8С (6SN7/ECC33) Dual triode
  • 6N9S 6Н9С (6SL7) Dual triode
  • 6N13S 6Н13С (6AS7G) Dual power triode
  • 6N14P 6Н14П Dual RF/VHF triode, similar to ECC84/6CW7
  • 6N23P 6Н23П (6DJ8/ECC88) Dual triode
  • 6N24P 6Н24П (ECC89/6FC7/6ES8) Dual RF/VHF triode for cascode amps
  • 6P1P 6П1П Power pentode, similar to 6AQ5/EL90
  • 6P3S 6П3С Beam-power tetrode, similar to 6L6GB
  • 6P3S-E 6П3С-Е Beam-power tetrode, similar to 5881/6L6WGB
  • 6P6S 6П6С (6V6) Beam-power tetrode
  • 6P14P 6П14П (6BQ5/EL84) Power pentode
  • 6S19P 6С19П - Output triode
  • 6L1P 6Л1П - Nonode for FM quadrature detection

List of very-high power tubes[edit]

Note: Typecode explained above.

GU-78B
 
ГУ-78Б (GU-78B) Power transmitter tetrode
  • G-807 Г-807 SW transmitter tube (the Russian 807 analogue).
  • GI-7B ГИ-7Б Impulse tube
  • GM-70 ГМ-70 Modulator tube
  • GS-31B ГС-31Б UHF transmitter tube
  • GU-29 ГУ-29 VHF transmitter tube
  • GU-50 ГУ-50 - VHF transmitter pentode, similar to the German LS-50 (no direct U.S. equivalent)
  • GU-78B ГУ-78Б VHF transmitter tetrode

List of indicator tubes[edit]

  • IN-33 ИН-33 Neon-filled, planar, dual 105-segment linear glow-transfer bar graph display tube with three cathode strings, for use inVU meters etc.; similar to PBG16101
  • ITM2-M ИТМ2-М Four-color phosphored-thyratron latching pixel; 4x4 array of 4 subminiature dual-starter luminiscent thyratrons each for the colors red, yellow, green and blue (thus, 5 intensities per color yields 54 = 625 colors), 4x4 matrix of 10-volts sensitive starter electrodes, cubic envelope for easy stacking in both axes, 12-pin all-glass pigtaled,[64] similar to today's RGBA LEDs
  • ITS1A ИТС1А Green phosphored-thyratron latching seven-segment display, no decimal point, 5-volts sensitive starter electrodes, all-glass pigtaled, rectangular envelope for easy stacking in both axes
  • MTX-90 МТХ-90 Small neon-filled thyratron for use as a latching single-dot indicator, top-viewing, top of envelope acts as a magnifier, all-glass pigtaled, comes with a blob of solder on the end of each wire for rapid installing, like today's ball grid arrays

List of other tubes[edit]

  • LP-4 ЛП-4 Linear trochotron, 26-pin acorn-type all-glass pigtaled,[65]

See also[edit]

Vacuum tubes by number of electrodes[edit]

Vacuum tubes by function or other properties[edit]

Cathode-ray tubes[edit]

Main article: Cathode-ray tube

Gas- or vapor-filled tubes[edit]

Main article: Gas-filled tube

 

 
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