This is a list of European Mullard–Philips vacuum tubes and their American equivalents. Most post-war European thermionic valve (vacuum tube) manufacturers have used the Mullard–Philips tube designation naming scheme. Special quality variants may have the letter "S" appended, or the device description letters may be swapped with the numerals (e.g. an E82CC is a special quality version of an ECC82) Note: Typecode explained above. The part behind a slash ("/") is the RMA/RETMA/EIA equivalent.
A - 4 V heater
AB AB1 – Dual diode AB2 – Dual diode
ABC ABC1 – Dual diode - triode, CBC1 with a different heater, 1930s European radios.
ABL ABL1 – Dual diode - power pentode, 1930s European radios.
AC AC2 – Triode for use as AF amplifier or as oscillator together with an AH1 mixer; side-contact 8 base, EC2 with a different heater AC50, 4686 – 3 mAavg, 300 mApeak, Argon-filled triode thyratron, side-contact 8 base with grid on top cap, for relaxation oscillators up to 50 kHz AC100 – Triode for use as AF amplifier or as oscillator together with an AH100 mixer; AC2 with a P5A German PTT 5-pin base AC101 – Triode for use as AF amplifier or as oscillator together with an AH100 mixer; AC2 with a European 5-pin base AC701 – Subminiature AF triode, 4-pin all-glass wire-ended with grid on top wire, for condenser microphone preamplifiers AC761 – Subminiature AF triode, 4-pin all-glass wire-ended with grid on top wire, for microphone preamplifiers
ACH ACH1 – Triode-Hexode mixer
A D AD1 – 4.2 W Power triode AD100 – 1.7 W Power triode, P7A German PTT 7-pin base AD101 – 1.7 W Power triode, O5A European 5-pin base AD102 – 5.5 W Power triode
AF AF2 – Remote-cutoff pentode AF3 – Remote-cutoff pentode. Identical to CF3 except for heater ratings AF7 – Sharp-cutoff pentode AF100 – Wide band, sharp-cutoff pentode
AH AH1 – Remote-cutoff Hexode for RF gain control or modulator, CH1 with a different heater AH100 – Remote-cutoff Hexode for RF gain control or modulator
AK AK1 – Octode pentagrid converter, 1930s European radios. European 7-pin base. AK2 – Octode pentagrid converter, CK1 with a different heater, 1930s European radios, side-contact 8 base, similar to EK2.
AL AL1 – AF Power pentode, 1930s European radios AL2 – AF Power pentode, 1930s European radios, side-contact 8 base. AL3 – AF Power pentode, 1930s European radios AL4 – AF Power pentode, 1930s European radios AL5 – Identical to EL5 except for heater ratings AL860 – RF/AF Power pentode, noval base
AM AM1 – Top-view, "Magic Cross"-type tuning indicator, EM1 with a different heater AM2, 4677 – Top-view, "Magic Eye"-type tuning indicator, identical to CM2 and EM2 except for heater ratings
AN AN1 – 300 mAavg, 2 Apeak, 15 Asurge, Gas-filled triode thyratron with negative control characteristic. O5A European 5-pin base, for industrial control applications
AX AX1, 4652 – 500 VPIV, 125 mA Gas-filled, full-wave rectifier, European 4-pin base AX50 – 500 VPIV, 275 mA Gas-filled, full-wave rectifier, European 4-pin base
AZ AZ1 – 60 mA Full-wave power rectifier, side-contact 8 base AZ2 – 160 mA Full-wave power rectifier, side-contact 8 base AZ3 – 120 mA Full-wave power rectifier, side-contact 8 base AZ4 – 200 mA Full-wave power rectifier, side-contact 8 base AZ11 – Full-wave power rectifier, AZ1 with Y8A 8-pin steel tube base AZ12 – Full-wave power rectifier, AZ4 with Y8A 8-pin steel tube base AZ21 – 120 mA Full-wave power rectifier, Loctal base AZ31 – Full-wave power rectifier, AZ1 with 5-pin Octal base AZ32 – Full-wave power rectifier, AZ2 with 5-pin Octal base AZ33 – 120 mA Full-wave power rectifier, 4-pin Octal base AZ41 – 70 mA Full-wave power rectifier, Rimlock base AZ50 – 300 mA Full-wave power rectifier, European 4-pin base
B - 180 mA heater
BB BB1 – Shielded common-cathode dual diode, CB2 with a 16 V heater and a European 5-pin base with one anode on top cap
BCH BCH1 – Triode-hexode mixer, German Hexode base, hexode control grid on top cap, ACH1 with a 24 V heater
BL BL2 – Power pentode, CL2 with a 30 V heater and a European 5-pin base with the control grid on top cap
C - 200 mA heater Note: Many "C" tubes had 13V/200mA heaters, so apart from 1930s European AC/DC radios, these were also used in 12-Volts car radios
CB CB1 – Dual diode, 5-pin side-contact base, 13 V heater, 1930s European radios. CB2 – Dual diode, 5-pin side-contact base, 13 V heater, 1930s European radios.
CBC CBC1 – Dual diode and triode, ABC1 with a 13 V heater, 1930s European radios.
CBL CBL1 – Dual diode and power pentode, 44 V heater, 1930s European radios. CBL6 – Dual diode and power pentode, 1930s European radios. CBL31 – Dual diode and power pentode, CBL1 with an Octal base, 1930s European radios.
CC CC2 – Triode, AC2 with a 13 V heater, 1930s European radios.
CCH CCH1 – Triode-hexode mixer, 1930s European radios. CCH2 – Triode-hexode mixer, 1930s European radios. CCH35 – Triode-hexode mixer, ECH3 with a different heater and base, 1930s European radios.
CF CF1 – Sharp-cutoff pentode, 13 V heater, 1930s European radios. CF2 – Remote-cutoff pentode, 13 V heater, 1930s European radios. CF3 – Remote-cutoff pentode, AF3 with a 13 V heater, 1930s European radios. CF7 – Sharp-cutoff pentode, AF7 with a 13 V heater, 1930s European radios. CF50 – Microphone preamplifier sharp-cutoff pentode CF51 – Microphone preamplifier sharp-cutoff pentode
CH CH1 – Hexode mixer, AH1 with a 13 V heater, 1930s European radios.
CK CK1 – Octode pentagrid converter, AK2 with a 13 V heater, 1930s European radios. CK3 – Octode pentagrid converter, EK3 with a different heater, 1930s European radios.
CL CL1 – Power pentode, 1930s European radios. CL2 – Power pentode, BL2 with a 24 V heater, 1930s European radios. CL4 – AF power pentode, 33 V heater, 1930s European radios. CL6 – Power pentode, 1930s European radios. CL33 – AF power pentode, CL4 with an octal base, 1930s European radios.
CM CM2 – Top-view, "Magic Eye"-type tuning indicator; has a 6.3 V/200 mA heater and was therefore marketed as C/EM2; identical to AM2 except for heater ratings
CY CY1 – 250 V, 80 mA Half wave rectifier, side-contact 8 base, 1930s European radios. CY2 – Separate-cathode dual 250 V, 60 mA rectifier, side-contact 8 base, for use as half wave rectifier or as voltage doubler. 1930s European radios. CY31 – CY1 with Octal base, 1930s European radios. CY32 – CY2 with Octal base, 1930s European radios.
D - 1.4 V filament/heater Note: D-type tubes except some rectifiers are directly heated.
DA DA50 – Subminiature diode, 3-pin all-glass wire-ended DA90 – Indirectly heated AM detector diode, miniature 7-pin base DA101 – Diode, miniature 7-pin base
DAC DAC21 – AM detector diode and AF triode DAC22 – AM detector diode and AF triode DAC25 – AM detector diode and AF triode DAC31 – AM detector diode and AF triode DAC32 – AM detector diode and AF triode DAC41w – AM detector diode and AF triode
DAF DAF11 – AM detector diode and AF pentode, wide-range heater DAF26 – AM detector diode and AF pentode DAF40 – AM detector diode and AF pentode DAF41 – AM detector diode and AF pentode DAF70 – Subminiature AM detector diode and AF pentode, all-glass wire-ended DAF91/1S5 – AM detector diode and AF pentode, miniature 7-pin base DAF92 – AM detector diode and AF pentode, miniature 7-pin base DAF96/1AH5 – AM detector diode and AF pentode, miniature 7-pin base DAF191 – AM detector diode and AF pentode, miniature 7-pin base DAF961 – AM detector diode and AF pentode, miniature 7-pin base
DAH DAH50 – Low voltage diode-heptode with a space charge grid
DBC DBC21 – Dual diode and Triode
DC DC11 – AF driver triode for DDD11, wide-range heater DC25 – AF driver triode for DDD25 DC41w – Driver triode DC70/6375 – Subminiature UHF triode for walkie-talkies, all-glass wire-ended DC80/1E3 – Triode, oscillator/mixer/amplifier DC90 – Triode, FM receiver oscillator/mixer/amplifier, miniature 7-pin base DC96 – Triode, FM receiver oscillator/mixer/amplifier, miniature 7-pin base DC760 – Subminiature electrometer inverted triode for probes, all-glass wire-ended DC761 – Subminiature UHF triode, all-glass wire-ended DC762 – Subminiature electrometer inverted triode for probes, 100 fA grid current, all-glass wire-ended —Special quality:
D1C (957) – Acorn UHF triode D2C (958) – Acorn UHF triode
DCC DCC90 – Dual triode, RF amplifier or oscillator, miniature 7-pin base
DCF DCF60/1V6 – Triode and pentode, oscillator/mixer, all-glass 7-pin wire-ended
DCH DCH11 – Remote-cutoff triode/hexode mixer, wide-range heater DCH21 – Remote-cutoff triode/hexode mixer DCH25 – Remote-cutoff triode/hexode mixer DCH41w – Remote-cutoff triode/hexode mixer
DD DD960 – VHF power triode, miniature 7-pin base
DDD DDD11 – Dual AF power triode, wide-range heater – preferred driver is DC11 DDD25 – Dual AF power triode – preferred driver is DC25 DDD41w – Dual power triode
DF DF11 – Remote-cutoff RF/IF pentode, wide-range heater DF21 – Sharp-cutoff RF/IF/AF pentode DF22 – Remote-cutoff RF/IF pentode DF25 – Remote-cutoff RF/IF pentode DF26 – Sharp-cutoff RF/IF pentode DF33 – Remote-cutoff RF/IF pentode DF41w – Remote-cutoff RF/IF pentode DF60/5678 – Subminiature sharp-cutoff RF/IF/AF pentode, all-glass wire-ended DF61 – Subminiature sharp-cutoff RF or mixer pentode, all-glass wire-ended DF62/1AD4 – Subminiature sharp-cutoff RF pentode, all-glass wire-ended, for use as RF/IF stage DF63 – Subminiature remote-cutoff RF pentode, all-glass wire-ended, for use as RF/IF stage DF64 – Subminiature AF pentode, all-glass wire-ended, for use in hearing aids DF65 – Subminiature AF pentode, all-glass wire-ended, for use in hearing aids DF66 – Subminiature AF pentode, all-glass wire-ended, for use in hearing aids DF67/6008 – Subminiature AF pentode, all-glass wire-ended, for use in hearing aids DF70 – Subminiature AF pentode, all-glass wire-ended, for use in hearing aids DF72 – Subminiature sharp-cutoff RF pentode, all-glass wire-ended, for use as RF/IF stage DF73 – Subminiature remote-cutoff RF pentode, all-glass wire-ended, for use as RF/IF stage DF91/1T4 – Remote-cutoff RF/IF pentode, miniature 7-pin base DF92/1L4 – Sharp-cutoff RF/IF pentode, miniature 7-pin base DF96/1AJ4 – Remote-cutoff RF/IF pentode, miniature 7-pin base DF97/1AN5 – Remote-cutoff RF/IF pentode, miniature 7-pin base DF161 – Subminiature AF pentode, all-glass wire-ended, for use in hearing aids DF167 – Subminiature AF pentode, all-glass wire-ended, for use in hearing aids DF191 – RF pentode, miniature 7-pin base DF651 (CK549DX) – Subminiature AF pentode, all-glass wire-ended, for use in hearing aids DF668 – Subminiature RF pentode, all-glass wire-ended DF669 – Subminiature RF/IF pentode, all-glass wire-ended DF703 (5886) – Subminiature electrometer pentode, envelope has a moisture-repellent coating, all-glass wire-ended, for probe amplifiers DF904/1U4/5910 – Sharp-cutoff SW/VHF pentode, miniature 7-pin base DF906 – Sharp-cutoff SW/VHF pentode, miniature 7-pin base DF961 – Sharp-cutoff SW/VHF pentode, miniature 7-pin base —Special quality:
D1F – D11F with a hand grip D2F – D12F with a hand grip D3F (959) – Acorn VHF pentode D11F – Acorn remote-cutoff RF/IF/AF pentode for portable transceivers D12F – Acorn RF/IF/AF pentode for portable transceivers
DK DK21 – Octode beam pentagrid converter DK32/1A7 – Heptode pentagrid converter DK40 – Octode pentagrid converter DK91/1R5 – Heptode pentagrid converter, miniature 7-pin base DK92/1AC6 – Heptode pentagrid converter, miniature 7-pin base DK96/1AB6 – Heptode pentagrid converter, miniature 7-pin base DK192 – Heptode pentagrid converter, miniature 7-pin base DK962 – Heptode pentagrid converter, miniature 7-pin base
DL DL11 – 1 W AF Power pentode, wide-range heater DL21 – 700 mW AF Power pentode DL25 – Power pentode DL29/3D6 – Power pentode DL33/3Q5GT – 330 mW AF Power pentode DL35 – 400 mW Power pentode DL41 – 1.2 W Power pentode DL41w – Cup Power pentode DL64 – Subminiature AF power pentode, all-glass wire-ended, for use in hearing aids, VA = 15 V, VAmax = 45 V DL65 – Subminiature AF power pentode, all-glass wire-ended, for use in hearing aids, DL67/6007 with a different pinout, VA = 22.5 V, VAmax = 45 V DL66 – Subminiature AF power pentode, all-glass wire-ended, for use in hearing aids, VA = 22.5 V, VAmax = 45 V DL67/6007 – Subminiature AF power pentode, all-glass wire-ended, for use in hearing aids, DL65 with a different pinout, VA = 22.5 V, VAmax = 45 V DL68 – Subminiature AF power pentode, all-glass wire-ended, for use in hearing aids, VA = 22.5 V, VAmax = 45 V DL69 – Subminiature power pentode, all-glass wire-ended, VA = 90 V DL70 – Subminiature VHF power pentode up to 200 MHz, all-glass wire-ended, for use in walkie-talkies, VA = 150 V DL71 – Subminiature AF power pentode, all-glass wire-ended, for use in hearing aids, VA = 22.5 V, VAmax = 45 V DL72 – Subminiature AF power pentode, all-glass wire-ended, for use in hearing aids, VAmax = 45 V DL73 (CV2299) – Subminiature VHF power pentode up to 200 MHz, all-glass wire-ended, for use in walkie-talkies, VA = 150 V DL91/1S4 – 700 mW AF Power pentode, miniature 7-pin base DL92/3S4 – 700 mW AF Power pentode, miniature 7-pin base DL93/3A4 – 2 W RF/AF Power pentode, miniature 7-pin base DL94/3V4 – 1.2 W AF Power pentode, miniature 7-pin base DL95/3Q4 – DL94/3V4 with a different pinout DL96/3C4 – 600 mW AF Power pentode, miniature 7-pin base DL98/3B4 – 3 W VHF power pentode up to 100 MHz, miniature 7-pin base DL161 – Subminiature AF power pentode, all-glass wire-ended, for use in hearing aids DL167 – 25 mW Subminiature AF power pentode, all-glass wire-ended, for use in hearing aids DL192 – 850 mW AF Power pentode, miniature 7-pin base DL193 – 1.5 W AF Power pentode, miniature 7-pin base DL620 – 110 mW Subminiature power pentode, all-glass wire-ended, VAmax = 90 V DL907 – SW/VHF power pentode, miniature 7-pin base DL962 – DL192 with a different filament DL963 – DL193 with a different filament
DLL DLL21 – 1.5 W AF Dual power pentode DLL101 – Dual power pentode, miniature 7-pin base DLL102 – Dual power pentode, miniature 7-pin base
DM DM21 – Top-view, "Magic Eye"-type tuning indicator DM70/1M3 – Side-view, subminiature band-and-dot-type tuning/level indicator, all-glass wire-ended DM71/1N3 – Side-view, subminiature band-and-dot-type tuning/level indicator, all-glass wire-ended DM160/6977 (ИВ-15) – First vacuum fluorescent display, single segment, side-view, for use as flip-flop status indicator in transistorized computers. All-glass wire-ended
DY DY30 – 30 kV CRT EHT rectifier DY51 – Half-indirectly heated 15 kV portable-TV CRT EHT rectifier, filament internally connected to cathode, all-glass, filament wire-ends on one end, anode wire-end on the other DY70 – 10 kV CRT EHT rectifier, 3-pin all-glass wire-ended, anode on top wire DY80 – 23 kV CRT EHT rectifier, noval base DY86/1S2 – Half-indirectly heated 18 kV CRT EHT rectifier, noval base, filament internally connected to cathode. Identical to EY86 except for heater ratings DY87/1S2A – DY86/1S2 with chemically treated envelope to avoid flush-over in high-humidity and low atmospheric-pressure conditions. Identical to EY87 except for heater ratings DY802 – Half-indirectly heated 20 kV CRT EHT rectifier, noval base, filament internally connected to cathode. Identical to EY802 except for heater ratings DY900 – Half-indirectly heated 16 kV CRT EHT rectifier, miniature 7-pin base, filament internally connected to cathode
E - 6.3 V heater
EA EA40 – 7 kV, 25 mA Diode, 4-pin Rimlock base EA50/2B35 – Diode for TV detectors, 3+1-pin all-glass subminiature with anode on top pin EA52/6923 – Instrumentation rectifier diode up to 1 GHz, Rocket-type disk-seal tube EA53 – Co-axial instrumentation rectifier diode up to 1 GHz, Rocket-type disk-seal tube EA76 – Diode, 5-pin all-glass wire-ended EA111 – Diode for time bases, Y8A 8-pin steel tube base EA766 – Diode, 5-pin all-glass wire-ended EA960 – 100 VPIV VHF Diode, miniature 7-pin base EA961 – 2 kVPIV VHF Diode, miniature 7-pin base EA962 – 100 VPIV VHF Diode with extremely small distance between cathode and anode for extended frequency range, miniature 7-pin base
EAA EAA11 – Dual diode, Y8A 8-pin steel tube base EAA91/6AL5 – Dual diode with separate cathodes, miniature 7-pin base, identical to HAA91/12AL5, UAA91 and XAA91/3AL5 except for heater ratings, EB91 with a shorter envelope EAA171 – Dual diode, separate cathodes, gnome tube —Special quality:
E91AA/EAA901S/5726 – Dual RF diode, miniature 7-pin base
EAB EAB1 – Triple diode with common cathode
EABC EABC80/6AK8 – High-mu triode, triple low-voltage diode (two on common cathode with triode, one with independent cathode). Noval base, used as an AF amplifier, AM detector and ratio detector in AC-powered post-war European AM/FM radios. Electronically identical to American types 6AK8 (usually marked 6AK8/EABC80), 6T8, and 6T8A; also DH719. Identical to 5T8, 6T8, HABC80/19T8, PABC80/9AK8 and UABC80/27AK8 except for heater ratings
EAC EAC91 – Diode/triode UHF mixer
EAF EAF21 – Diode - pentode, UAF21 with a different heater EAF41 – Diode - remote-cutoff RF/IF/AF pentode, Rimlock base, UAF41 with a different heater EAF42/6CT7 – Diode - remote-cutoff RF/IF/AF pentode, Rimlock base EAF801 – Diode - remote-cutoff pentode, Noval base
EAM EAM86/6GX8 – Diode - side-view, band-type tuning/level indicator
EB EB1 – Low-power dual diode EB2 – Low-power dual diode EB4 – Low-power dual diode, EB11 or EB34 with a side-contact 8 base EB11 – Low-power dual diode, EB4 or EB34 with a Y8A 8-pin steel tube base EB34 – Low-power dual diode, EB4 or EB11 with an Octal base EB40 – Low-power dual diode EB41 – Low-power dual diode EB91 – Dual diode with separate cathodes, miniature 7-pin base, for FM ratio detectors, EAA91/6AL5 with a longer envelope
EBC EBC1 – Low-power dual diode and triode, ABC1 with a different heater EBC3 – Low-power dual diode and triode EBC11 – Low-power dual diode and triode EBC33 – Low-power dual diode and triode, EBC3 with an Octal base EBC41 – Low-power dual diode and triode, EBC81/6BD7A with a Rimlock base EBC81/6BD7A – Low-power dual diode and triode, EBC41 with a Noval base EBC90/6AT6 – High-mu triode and common cathode dual diode, miniature 7-pin base, HBC90/12AT6 with a different heater EBC91/6AV6 – High-mu AF triode and common cathode dual diode, for use in FM ratio detectors, miniature 7-pin base, HBC91/12AV6 with a different heater
EBF EBF2 – Common-cathode dual diode and remote-cutoff RF/IF/AF pentode, EBF11 or EBF35 with a side-contact 8 base EBF11 – Common-cathode dual diode and RF/IF/AF pentode, EBF2 or EBF35 with a Y8A 8-pin steel tube base, VBF11 with different heater ratings EBF15 – Dual diode and pentode, UBF15 with a different heater EBF32 – Common-cathode dual diode and remote-cutoff RF/IF pentode, Octal base with g1 on cap EBF35 – Common-cathode dual diode and remote-cutoff RF/IF pentode, identical to EBF2 and EBF11 except for Octal base with g1 on cap EBF80/6N8 (WD709) – Common-cathode dual diode and remote-cutoff pentode, noval base EBF83/6DR8 – Common-cathode dual diode and pentode, anode voltage 6 to 50 V, for use as IF amplifier, detector and AGC diode in vehicle equipment, noval base EBF89/6DC8/7125 – Common-cathode dual diode and RF/IF pentode, noval base EBF171 – Dual Diode and remote-cutoff RF/IF/AF pentode; the first gnome tube, a modified and repackaged EBF11
EBL EBL1 – Dual diode and power pentode, identical to EBL21 and EBL31 except for side-contact 8 base, and heater ratings EBL21 – Dual diode and power pentode, identical to EBL1 and EBL31 except for B8G Loctal base, and heater ratings EBL31 – Dual diode and power pentode, identical to EBL1 and EBL21 except for Octal base, and heater ratings EBL71 – Dual diode and power pentode
EC EC2 – Triode for use as AF amplifier or as oscillator, side-contact 8 base, AC2 with a different heater EC40 – VHF Triode up to 500 MHz, EC80 with a Rimlock base EC41 – UHF oscillator triode, EC81 with a Rimlock base EC50 – Helium-filled triode thyratron for use as a horizontal sweep, sawtooth waveform generator in oscilloscopes EC52 – RF triode for use as an oscillator, B9G 9-pin Loctal base EC53 – VHF triode for use as an oscillator up to 600 MHz EC55/5861 (R243) – 3 GHz, 10 W Disk-seal UHF triode EC56 – 4 GHz Disk-seal microwave triode EC57 (EC157) – Disk-seal microwave triode EC70/6778 – Subminiature UHF triode for use as an oscillator in the 500 MHz range, 8-pin all-glass wire-ended EC71/5718 – Subminiature UHF triode up tp 1 GHz, for use as an oscillator in the 500 MHz range, 8-pin all-glass wire-ended EC80/6Q4 – VHF Triode up to 500 MHz EC81/6R4 – UHF oscillator triode EC84/6AJ4 – High-mu triode EC86/6CM4 – UHF triode, PC86/4CM4 with a different heater EC88/6DL4 – UHF triode, PC88/4DL4 with a different heater. This and the EC86 were often encountered in UHF TV tuners, the latter as a self oscillating mixer EC90/6C4 – 3.6 W Small-power VHF triode up to 150 MHz; single ECC82/12AU7 system EC91/6AQ4 – VHF triode up to 250 MHz EC92/6AB4 – VHF triode for FM receiver frontends, single ECC81/12AT7 system, UC92/9AB4 with a different heater EC94/6AF4 – UHF mixer/oscillator triode EC95 – VHF triode with variable mutual conductance, PC95 with a different heater EC97/6FY5 – Frame-grid VHF triode, identical to PC97/4FY5 and XC97 except for heater ratings EC98 – UHF triode EC157/8108 – 4 GHz, 12.5 W Disk-seal microwave triode EC158 – Low-voltage, 4 GHz, 30 W disk-seal microwave triode EC760 (5718) – Subminiature VHF mixer/oscillator triode up to 500 MHz, 7-pin all-glass wire-ended EC860 – 20 mAavg, 500 mApk Helium-filled grid-turn-off triode thyratron e.g. for relaxation oscillators up to 150 kHz, noval base EC900 – VHF triode, PC900 with a different heater —Special quality:
EC1000 – Triode for use as amplifier in probes EC1030 – Indirectly heated UHF triode, hot-standby (no cathode current) resistant, all-glass wire-ended with 8 tinned, 38 mm long wires EC1031 – EC1030 with 5.5 mm long, gold-plated pins for insertion into a special socket EC8010 – UHF triode for use as amplifier or oscillator up to 1 GHz EC8020 – UHF triode E1C, 4671 (955) – Acorn UHF triode E20C – RF triode for wide band cascode circuits, B8G Loctal base E86C (EC806S) – UHF triode up to 800 MHz, gold-plated pins E88C/8255 – UHF triode for grounded-grid amplifiers, up to 1 GHz
ECC ECC32/6SN7 – Separate cathodes dual AF triode, octal base ECC33 – Separate cathodes, high-mu dual triode for use as a flip-flop, octal base ECC34 – Separate cathodes, dual triode for use as a CRT vertical-deflection power multivibrator, octal base ECC35/6SL7 – Separate cathodes, high-mu AF dual triode, octal base ECC40 – Separate cathodes, AF dual triode, Rimlock base ECC70/6021 – Separate cathodes, subminiature VHF medium-mu dual triode, 8-pin all-glass wire-ended ECC81/12AT7 (6060, M8162, B309) – High-mu dual triode, for use as RF amplifier/mixer in VHF circuits, noval base. Two EC92/6AB4s in one envelope, the ECC81 being specified with the same frequency characteristics as the EC92. ECC82/12AU7 (6067, M8136, B329) – Medium-mu dual triode for use as AF amplifier, noval base, identical to XCC82 except for heater ratings. Two EC90/6C4s in one envelope; however, the ECC82 is only specified as an audio frequency device. ECC83/12AX7 (6057, M8137, B339) – High-mu dual triode for use as a high-gain AF amplifier, noval base ECC84/6CW7 – Dual VHF triode for grounded-grid/cascode amplifiers in TV tuners; section 1 cathode is connected to two adjacent pins and the screen between the two sections is internally connected to the section 2 grid; noval base. Identical to PCC84/7AN7 and UCC84 except for heater ratings ECC85/6AQ8 – Dual triode for use as VHF oscillator/mixer up to 200 MHz, noval base, identical to HCC85/17EW8, PCC85/9AQ8 and UCC85 except for heater ratings ECC86/6GM8 – Dual low (6.3-25 V) anode voltage triode, noval base, for use in VHF tuners in vehicle equipment ECC87 (E80CC/6085) – ECC40 with a Noval base, allowing for a heater center-tap ECC88/6DJ8 – Dual triode used as cascode RF amplifier in TV tuners and VHF receiver front ends, or as general-purpose instrumentation dual triode, noval base, PCC88/7DJ8 with a different heater 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 Notes: All ECC8x have separate cathodes ECC81, 82 & 83 have the individual triode heaters internally series-connected, with the midpoint on a separate pin, so they could be run on both 6.3 V and 12.6 V (hence RETMA lists them as 12V types), which was useful in dual-system (6V and 12V) car radios All other ECC8x have no heater midpoint tap; ECC85, 86 & 88 have the freed-up pin being used for an internal screen between the sections ECC91/6J6 – Common cathode dual VHF triode, miniature 7-pin base ECC92 – Common cathode dual triode for use as a flip-flop in computers, miniature 7-pin base ECC99 – Separate cathodes dual RF triode, noval base ECC171 – Separate cathodes and separate heaters dual triode, 11-pin gnome tube with internal shield ECC180/6BQ7A – Separate cathodes, dual VHF triode for cascode amplifiers ECC186/7316 – Separate cathodes, dual triode for use in digital computers, withstands zero cathode current for extended periods of time ECC189/6ES8 – Separate cathodes, dual variable-mu VHF triode for cascode amplifiers; identical to PCC189/7ES8, XCC189/4ES8 and YCC189/5ES8 except for heater ratings ECC230/6AS7G/6080 – Separate cathodes, dual low-mu power triode for use as series regulator in DC power supplies, servo applications, or as a horizontal booster triode in TV monitors, Octal base ECC802 – Separate cathodes, dual AF triode ECC803 – Separate cathodes, dual low-microphonics AF triode ECC807 – Separate cathodes, dual AF triode for high-gain preamplifiers ECC808/6KX8 – Separate cathodes, dual AF triode for use as record head output tube in tape recorders ECC812 – Separate cathodes, dual shielded triode for color TV chrominance outputs in SECAM TV receivers ECC832/12DW7/7247 – Dual 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 ECC960 – Common cathode, dual triode for use as a flip-flop in computers —Special quality:
ECC2000 – VHF separate cathodes, dual triode with neutralization screen, for use in cascode amplifiers up to 300 MHz, 10-pin Decal base ECC8100 – VHF separate cathodes, dual triode with neutralization screen ("Neutrode") connected to the heater, for use in cascode amplifiers, noval base E80CC/6085 – Separate cathodes, dual triode for use as DC or AF amplifier E81CC/ECC801S/6201 – Separate cathodes, dual triode for AF and RF amplifiers, mixers up to 300 MHz, oscillators, impulse circuits; withstands zero cathode current for extended periods of time E82CC/ECC802S/6189 – Separate cathodes, dual triode for use as amplifier or multivibrator E83CC/6681 (ECC803S/6057) – Separate cathodes, low-microphonics dual triode E88CC/6922 – Separate cathodes, dual triode, gold-plated pins E90CC/5920 – Common cathode, dual triode for use as a flip-flop in computers E92CC – Common cathode, dual triode for use as a flip-flop in computers E180CC/7062 – (5965) Separate cathodes, dual triode for use as a flip-flop in computers E181CC – Separate cathodes, dual triode for use in digital computers, withstands zero cathode current for extended periods of time E182CC/7119 – Separate cathodes, dual triode for use as a flip-flop in computers E188CC/7308 – Separate cathodes, dual triode for use as RF/IF/AF amplifier E283CC – Separate cathodes, dual triode for use as AF or instrumentation amplifier E288CC/8223 – Separate cathodes, dual triode for use in IF, RF and cascode amplifiers
ECF ECF1 – Triode - Pentode ECF12 – Triode - Pentode ECF80/6BL8 – VHF mixer/oscillator triode/pentode, identical to LCF80/6LN8, PCF80/9A8, UCF80 and XCF80/4BL8 except for heater ratings ECF82/6U8 – Triode - Pentode. Identical to PCF82/9U8A and XCF82 except for heater ratings ECF83 – Triode - remote-cutoff pentode, low microphonics, for vehicle equipment ECF86/6HG8 – VHF mixer/oscillator triode/pentode, identical to LCF86/5HG8, PCF86/7HG8, 8HG8 and XCF86/4HG8 except for heater ratings ECF174 – Triode and pentode, gnome tube ECF200/6X9 – Triode and pentode for use as IF amplifier in TV receivers, decal base, PCF200 with a different heater ECF201/6U9 – Triode and pentode for use as IF amplifier and sync sep in TV receivers, decal base, identical to LCF201/5U9 and PCF201 except for heater ratings ECF202 – Triode and pentode for use as SECAM chroma signal demodulators in analog color TV receivers, decal base ECF801/6GJ7 – Triode and pentode for use as VHF mixer in TV receivers, noval base, identical to LCF801/5GJ7, PCF801/8GJ7 and XCF801/4GJ7 except for heater ratings ECF802/6JW8 – Triode and pentode for use as reactance and sinewave oscillator in TV receivers, noval base, identical to LCF802/6LX8, PCF802/9JW8 and 5JW8 except for heater ratings ECF804 – Triode and pentode for use as wide band amplifier, noval base, PCF804 with a different heater ECF805 – Triode and pentode, noval base, PCF805/7GV7 with a different heater ECF812 = 6FL2 – Triode and beam tetrode, noval base, PCF812 (=30FL2) with a different heater —Special quality:
ECF8070 – Triode - Pentode E80CF/7643 – Triode - pentode
ECH ECH3 – Triode/hexode oscillator/mixer, ECH33 with a side-contact 8 base ECH4 – Triode/heptode oscillator/mixer, ECH21 with a side-contact 8 base ECH11 – Triode/hexode oscillator/mixer, VCH11 with a different heater ECH21 (X143) – Triode/heptode oscillator/mixer, ECH4 with a B8G Loctal base ECH33 – Triode/hexode oscillator/mixer, ECH3 with an Octal base ECH35 (X147) – Triode/hexode oscillator/mixer ECH41 – Triode/hexode oscillator/mixer ECH42/6CU7 – Triode/hexode oscillator/mixer, UCH42 with a different heater ECH43 – Triode/hexode oscillator/mixer, low-microphonics version of ECH42; UCH43 with a different heater ECH71 – Triode/heptode oscillator/mixer ECH80/6AN7 – Triode-hexode oscillator/mixer ECH81/6AJ8 (X719) – Triode/heptode oscillator/mixer, XCH81 with a different heater ECH83/6DS8 – Low (6.3-25 V) anode voltage, Triode/heptode oscillator/mixer, for use in vehicle equipment ECH84 – Triode/heptode oscillator/mixer ECH171 – Triode/remote-cutoff heptode Mixer, gnome tube ECH200 – Triode/heptode, for TV sync sep, PCH200 with a different heater —Special quality:
ECH8000 – Triode/remote-cutoff heptode oscillator/mixer
ECL ECL11 – Triode - power tetrode ECL80/6AB8 – Triode - power pentode ECL81 – Triode - power pentode. Identical to PCL81 except for heater ratings ECL82/6BM8 – AF triode - AF power pentode, identical to PCL82/16A8, UCL82/50BM8 and XCL82 except for heater ratings ECL83 – Triode - power pentode, PCL83 with a different heater ECL84/6DX8 – TV sync sep triode - CRT cathode drive power pentode, identical to LCL84/10DX8, PCL84/15DQ8 and XCL84/8DX8 except for heater ratings ECL85/6GV8 – Triode - power pentode used in TV receivers for vertical timebase, generally as a multivibrator, with the pentode section doubling as one half of the multivibrator and the power output device, identical to LCL85/10GV8, PCL85/18GV8 and XCL85/9GV8 except for heater ratings ECL86/6GW8 – AF Triode - AF power pentode, used for audio amplification in European TV receivers, PCL86/14GW8 with a different heater ECL113 – Triode - AF power pentode, Rimlock base ECL200 – Triode - CRT drive power pentode, decal base, PCL200 with a different heater ECL802 – Triode - Power pentode for use as vertical oscillator and output tube in TV receivers ECL805 – Triode - Power pentode with separate cathodes, PCL805 with a different heater
ECLL ECLL800 – Triode and 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
ED ED111 – 6 W VHF power triode up to 85 MHz ED500 – Identical to PD500 except for heater ratings ED501 – 27 kV Color CRT EHT shunt stabilizer triode —Special quality:
ED8000 – Power triode for use in series-pass voltage regulators
EDD EDD11 – Dual power triode EDD171 – Dual high-mu power triode, gnome tube
EE EE58L - RF Output Triode, used at ATC transponders (used in Collins TDR-90 transponder). EE1 (EEP1, 4696) – Single-ended secondary emission amplifier for use as a wide band amplifier and phase inverter EE50 – Single-ended secondary emission amplifier for use in TV receivers, B9G 9-pin Loctal base
EEL EEL71 – AF Tetrode - AF power pentode, B8G Loctal base, for use as audion detector, AF preamplifier, AF power amplifier EEL171 – Remote-cutoff tetrode and 4-Watt power pentode, gnome tube
EEP EEP1 See EE1
EF EF1 – RF/IF Pentode EF2 – Remote-cutoff RF/IF pentode EF3 – Remote-cutoff RF/IF pentode EF5 – Remote-cutoff pentode EF6 – AF Pentode, EF36 with a side-contact 8 base EF7 – RF/IF Pentode 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 (technically a hexode), EF38 with a side-contact 8 base EF9 – Pentode, EF22/7B7, EF39/6K7 or EF41/6CJ5 with a side-contact 8 base with control grid on top cap EF11 – Remote-cutoff pentode, Y8A 8-pin steel tube base EF12 – Pentode, Y8A 8-pin steel tube base EF13 – Remote-cutoff pentode EF14 – Sharp-cutoff pentode, Y8A 8-pin steel tube base, identical to UF14 and VF14 except for heater ratings EF15 – Remote-cutoff pentode, UF15 with a different heater EF22 – Pentode, EF9, EF39/6K7 and EF41/6CJ5 with a B8G Loctal base EF27 – Pentode EF36 – Pentode, EF6 with an Octal base EF37/6J7 – Sharp-cutoff pentode for use as a tuned RF amplifier, a (second) detector, or an AF amplifier; octal base with control grid on top-cap EF38 – EF8 with an Octal base EF39/6K7 – Remote-cutoff RF pentode for use as an IF amplifier or as a superheterodyne mixer (1st detector). Also used in test equipment. EF4, EF22 and EF41/6CJ5 with an Octal base with control grid on top-cap EF40 – AF Pentode EF41/6CJ5 (62VP) – Remote-cutoff pentode, EF4, EF22/7B7 or EF39/6K7 with a Rimlock base EF42 – Pentode, EF52 with a Rimlock base EF43 – Remote-cutoff pentode EF50 (EF53) – Remote-cutoff pentode for use in the IF stages of 1940s TV and radar receivers, B9G 9-pin Loctal base EF51 – Remote-cutoff pentode EF52 – Pentode, EF42 with a B8G Loctal base EF54 – Pentode, B9G 9-pin Loctal base EF55 – Pentode, B9G 9-pin Loctal base EF70 – Subminiature pentode, suppressor grid available on separate wire-end and internally connected to a separate diode to prevent positive grid voltage, for use as a NAND gate in coincidence circuits; all-glass 8-pin wire-ended EF71/5899 – Subminiature remote-cutoff pentode, all-glass 8-pin wire-ended EF72 – Subminiature sharp-cutoff RF pentode, all-glass 8-pin wire-ended EF73 – Subminiature AF pentode, all-glass 8-pin wire-ended EF74 – Subminiature, low-microphonics pentode, all-glass 8-pin wire-ended EF80/6BX6 (Z152) – Sharp-cutoff RF/IF/Video pentode, noval base EF83 – Remote-cutoff AF pentode, Noval base EF85/6BY7 (W719) – Remote-cutoff wideband RF pentode, noval base, identical to HF85 and XF85 except for heater ratings
EF86/6BK8 (6267, Z729) – AF Pentode. Identical to PF86 and UF86 except for heater ratings, Noval base EF89/6DA6 – Remote-cutoff VHF pentode, Noval base EF91/6AM6 (6064, Z77, M8083, 8D3) – Sharp-cutoff pentode, Miniature 7-pin base EF92/6CQ6 (M8161) – Remote-cutoff RF pentode, Miniature 7-pin base EF93/6BA6 (W727) – Remote-cutoff RF pentode, miniature 7-pin base, HF93/12BA6 with a different heater EF94/6AU6 – Sharp-cutoff RF/IF/AF pentode, miniature 7-pin base, identical to HF94/12AU6 and XF94/3AU6 except for heater ratings EF95/6AK5 (5654, 408A, 6J1P (6Ж1П), CV4010) – RF Pentode, Miniature 7-pin base EF96/6AG5 – Pentode, Miniature 7-pin base EF97/6ES6 – Low (6.3-50 V) anode voltage, remote-cutoff RF/IF pentode, for use in vehicle equipment, Miniature 7-pin base EF98/6ET6 – 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 EF111 – Remote-cutoff pentode, Y8A 8-pin steel tube base EF112 – Pentode, Y8A 8-pin steel tube base EF172 – RF/IF/AF Pentode, gnome tube EF174 – Pentode, gnome tube EF175 – Remote-cutoff RF/IF pentode, gnome tube EF176 – VHF Pentode, gnome tube EF177 – VHF Pentode, gnome tube EF183/6EH7 – Frame grid, remote-cutoff IF pentode for use in TV receivers, identical to LF183/YF183/4EH7 and XF183/3EH7 except for heater ratings EF184/6EJ7 – Frame-grid, sharp-cutoff IF pentode for use in TV receivers, identical to LF184/YF184/4EJ7 and XF184/3EJ7 except for heater ratings EF410 – RF/IF Pentode, Rimlock base EF730/5636 – Subminiature dual-control, sharp-cutoff RF/IF pentode for use as a gated or gain-controlled amplifier, 8-pin all-glass wire-ended, similar to 5784 EF731 – Subminiature remote-cutoff RF pentode, 8-pin all-glass wire-ended EF732 – Subminiature sharp-cutoff RF pentode, 8-pin all-glass wire-ended EF734 – Subminiature sharp-cutoff RF pentode, 8-pin all-glass wire-ended EF762 – Subminiature sharp-cutoff RF/IF pentode, 8-pin all-glass wire-ended EF800 – Long-life sharp-cutoff RF/IF pentode EF802 – Long-life RF/IF pentode EF804 – AF low-hum, low-microphonics pentode EF816 – Dual-anode pentode for TV receiver sync separation service EF860 – Long-life sharp-cutoff RF pentode for use as preamplifier in telecomms wide-area receivers. Identical to IF860 except for heater ratings (300mA) —Special quality:
EF804S – Ruggedized, long-life version of EF804 EF805S – Long-life remote-cutoff RF/IF pentode EF806S – Ruggedized, long-life AF pentode EF5000 – secondary emission wide band pentode, noval base EF8010 – Remote-cutoff RF/IF pentode E1F (954, 4672) – Acorn UHF pentode E2F (956, 4695) – Acorn UHF pentode E3F – E13F with a hand grip E13F – Acorn remote-cutoff RF/IF/AF signal/power pentode for portable transceivers E80F/6084 – AF pentode, gold-plated pins E83F/6689 – Long-life, wide band pentode for use in telephone equipment, gold-plated pins E90F/6BH6/7693 – RF Pentode E95F/6AK5W/5654 – Pentode E99F/6BJ6/7694 – Remote-cutoff RF pentode E180F/6688 – Wide band pentode, wideband amplifier for professional equipment E186F/7737 – Wide band pentode, wideband amplifier E280F/7722 – Wide band pentode, wideband amplifier E282F – Pentode, wideband amplifier up to 250 MHz E810F/7788 – Wide band pentode, gold-plated pins
EFF EFF51 – Dual VHF pentode up to 500 MHz, B9G 9-pin Loctal base
EFL EFL200/6Y9 – Sync sep pentode and CRT cathode drive power pentode, decal base; identical to LFL200/11Y9 and PFL200/16Y9 except for heater ratings
EFM EFM1 – Variable-mu AF pentode - top-view, "Magic Eye"-type tuning indicator EFM11 – Variable-mu AF pentode - top-view, "Magic Eye"-type tuning indicator
EFP EFP60 – Secondary emission pentode for TV amplifiers, B9G 9-pin Loctal base
EH EH1 – Remote-cutoff hexode mixer, separate oscillator EH2 – Remote-cutoff heptode mixer, separate oscillator EH81 (E81H) – Sharp-cutoff heptode used as FM quadrature demodulator EH90/6CS6 – Sharp-cutoff heptode for use in TV receivers EH171 – Sharp-cutoff heptode, gnome tube EH860 – Sharp-cutoff heptode —Special quality:
EH900S/5915 – Sharp-cutoff switching heptode, designed for high speed digital computers E91H/6687 – Sharp-cutoff heptode for use as a NAND gate in a coincidence circuit
EK EK1 – Octode pentagrid converter EK2 – Octode pentagrid converter, similar to AK2, EK32 with a side-contact 8 base EK3 – Beam octode pentagrid converter, CK3 with a different heater, similar to AK2, side-contact 8 base EK32 – Octode pentagrid converter, EK2 with octal base and top cap EK90/6BE6 – He