Electronic tube and vacuum tube catalog

Base

12BU

Socket code

B12C

Electrical Summary

Heater	9.8 V / 600 mA
Plate	S1: 330 V / 1.7 WS2: 275 V / 10 W
Screen	S1: 330 V / 1.1 WS2: 275 V / 2 W
rP	S1: 150,000 ΩS2: 100,000 Ω
gm	S1: 1 mA/VS2: 6.5 mA/V

Sections

2

12 pins - B12C - Duodecar 12-contact

Duodecar combination tube for television receivers, integrating a beam-power audio output section with a dual-control pentode used for FM detection and signal processing.

Base

12EY

Socket code

B12C

Electrical Summary

Heater	10.5 V / 600 mA
Plate	400 V / 19 W
Screen	300 V / 2.75 W
Ik max	110 mA
rP	12,000 Ω
gm	10.3 mA/V

Sections

1

12 pins - B12C - Duodecar 12-contact

Beam-power output tube designed for audio-frequency power amplification in television receivers, with series-string heater characteristics suited to transformerless consumer equipment.

Base

9DX

Socket code

B9A

Electrical Summary

Heater	10.5 V / 450 mA
Plate	S1: 300 V / 1 WS2: 300 V / 5 W
Screen	S2: 330 V / 1.5 W
rP	S1: 39,000 ΩS2: 66,000 Ω
gm	S1: 1.55 mA/VS2: 12.6 mA/V
μ	S1: 60S2: 60

Sections

2

9 pins - B9A - Small-button Noval 9-contact

Combination receiving tube incorporating a beam-power audio output section with an additional small-signal section for television or radio receiver circuitry.

Base

12EZ

Socket code

B12C

Electrical Summary

Heater	9.8 V / 600 mA
Plate	S1: 275 V / 10 WS2: 330 V / 1.7 W
Screen	S1: 275 V / 2 WS2: 330 V / 1.1 W
Ik max	S1: 60 mA
rP	S1: 100,000 ΩS2: 150,000 Ω
gm	S1: 6.5 mA/VS2: 1 mA/V

Sections

2

12 pins - B12C - Duodecar 12-contact

Compact beam-power output tube for receiver audio stages, providing useful Class-A output power from a heater arrangement intended for series-string equipment.

Base

8AO

Socket code

—

Electrical Summary

Heater	117 V / 90 mA
Plate	S2: 117 V
Screen	S2: 117 V
Rectifier	S1: 75 mA
V Drop	S1: 16 V
V Inverse	S1: 350 V
rP	S2: 17,000 Ω
gm	S2: 5.3 mA/V

Sections

2

8 pins

Combination tube with a high-voltage heater for line-operated equipment, integrating rectifier and beam-power audio-output functions in a single envelope.

Base

8A0

Socket code

Refer to variations

Electrical Summary

Heater	117 V / 90 mA
Plate	S2: 117 V / 6 W
Screen	S2: 117 V / 1 W
Rectifier	S1: 75 mA
V Inverse	S1: 350 V
rP	S2: 13,000 Ω
gm	S2: 5.3 mA/V

Sections

2

8 pins

117 V line-operated combination tube containing a rectifier and beam-power audio output section, intended for transformerless radio and related consumer equipment.

Base

—

Socket code

IO

Electrical Summary

Heater	117 V / 90 mA
Plate	S2: 117 V / 6 W
Screen	S2: 117 V / 1 W
Rectifier	S1: 76 mA
V Drop	S1: 16 V
V Inverse	S1: 350 V
rP	S2: 17,000 Ω
gm	S2: 5.3 mA/V

Sections

2

8 pins - IO - International Octal

Line-operated multi-section tube combining rectification with beam-power audio amplification, using a high-voltage heater suitable for direct or series supply operation.

Base

8AV

Socket code

—

Electrical Summary

Heater	117 V / 90 mA
Plate	S2: 117 V / 5.5 W
Screen	S2: 117 V / 1 W
Rectifier	S1: 75 mA
V Drop	S1: 6 V
V Inverse	S1: 350 V
rP	S2: 16,000 Ω
gm	S2: 7 mA/V

Sections

2

8 pins

117 V combination tube containing a half-wave rectifier and beam-power amplifier, intended for transformerless equipment with the power section providing Class-A audio output.

Base

Refer to variations

Socket code

Refer to variations

Electrical Summary

Refer to variations

Sections

1

Specialized beam-power valve for high-voltage pulse and modulation service, featuring low interelectrode capacitance and kilovolt-class series-modulation standoff rather than ordinary receiver output duty.

Base

—

Socket code

—

Electrical Summary

Heater	4.2 V / 2.5 A
Plate	3,500 V / 10 W
Screen	700 V / 2 W
Ik max	2.5 A

Sections

1

7 pins

Industrial beam-power modulator valve designed for series and break-modulator pulse service, with kilovolt quiescent operation and peak anode-voltage capability exceeding 12 kV.

Base

9LY

Socket code

—

Electrical Summary

Heater	11.6 V / 450 mA
Plate	S1: 250 V / 0.5 WS2: 250 V / 6 W
Screen	S2: 200 V / 1.5 W
Ik max	S2: 70 mA
rP	S1: 11,000 ΩS2: 13,000 Ω
gm	S1: 5.5 mA/VS2: 8.5 mA/V
μ	S1: 60S2: 5.8

Sections

2

9 pins

Multi-section receiving tube combining a beam-power audio-output stage with an additional small-signal section for television or radio receiver functions.

Base

9EU

Socket code

B9A

Electrical Summary

Heater	12.6 V / 200 mA
Plate	315 V / 12 W
Screen	285 V / 2 W
rP	50,000 Ω
gm	4 mA/V

Sections

1

9 pins - B9A - Small-button Noval 9-contact

Miniature beam-power tube intended for audio-frequency output service in television and radio receivers, providing several watts of Class-A power from a compact envelope.

Base

12EZ

Socket code

B12C

Electrical Summary

Heater	12.6 V / 450 mA
Plate	S1: 165 V / 6 WS2: 330 V / 1.7 W
Screen	S1: 150 V / 1.25 WS2: 330 V / 1.1 W
Ik max	S1: 60 A
rP	S1: 33,000 ΩS2: 150,000 Ω
gm	S1: 5.6 mA/VS2: 0.4 mA/V

Sections

2

12 pins - B12C - Duodecar 12-contact

Combination tube integrating a beam-power audio output section with a dual-control pentode, allowing power amplification and small-signal receiver functions in one envelope.

Base

12BU

Socket code

B12C

Electrical Summary

Heater	12.6 V / 450 mA
Plate	S1: 275 V / 10 WS2: 330 V / 1.7 W
Screen	S1: 275 V / 2 WS2: 330 V / 1.1 W
rP	S1: 100,000 ΩS2: 150,000 Ω
gm	S1: 10 mA/VS2: 1 mA/V

Sections

2

12 pins - B12C - Duodecar 12-contact

Duodecar television combination tube integrating a beam-power audio output stage with a sharp-cutoff dual-control pentode used for FM sound detection.

Base

12EZ

Socket code

B12C

Electrical Summary

Heater	12.6 V / 600 mA
Plate	S1: 330 V / 1.7 WS2: 165 V / 6.5 W
Screen	S1: 330 V / 1.1 WS2: 150 V / 1.8 W
Ik max	S1: 65 AS2: 65 mA
rP	S1: 30,000 ΩS2: 30,000 Ω
gm	S1: 8.6 mA/VS2: 8.6 mA/V

Sections

2

12 pins - B12C - Duodecar 12-contact

Multi-section television receiving tube incorporating a beam-power audio output stage with an additional small-signal section for receiver amplification or control functions.

Base

7CV

Socket code

B7G

Electrical Summary

Heater	12.6 V / 600 mA
Plate	315 V / 10 W
Screen	117 V / 2.2 W
rP	73,000 Ω
gm	4.8 mA/V

Sections

1

7 pins - B7G - Miniature 7-contact

Miniature beam-power tube for Class-A audio output service in consumer receivers, designed for substantial current at relatively low plate and screen voltages.

Base

9HN

Socket code

B9A

Electrical Summary

Heater	12.6 V / 600 mA
Plate	250 V / 20 W
Screen	250 V / 2 W
Ik max	55 mA
gm	6.2 mA/V

Sections

1

9 pins - B9A - Small-button Noval 9-contact

Beam-power tube intended for television and audio-frequency power-output applications, providing a compact output stage where moderate power and beam construction are useful.

Base

—

Socket code

IO

Electrical Summary

Heater	6.3 V / 1.6 A
Plate	800 V / 35 W
Screen	200 V / 5 W
Ik max	300 mA
gm	14 mA/V

Sections

1

8 pins - IO - International Octal

Industrial beam tetrode from the Ediswan/Mazda family, intended for demanding electronic power and control applications with substantial plate-dissipation capability.

Base

—

Socket code

IO

Electrical Summary

Heater	6.3 V / 1.6 A
Plate	600 V / 35 W
Screen	600 V / 6 W
Ik max	175 mA
rP	12,000 Ω
gm	11 mA/V

Sections

1

8 pins - IO - International Octal

Industrial beam tetrode designed for series- or parallel-regulator service in stabilized power supplies and also usable as a high-power AF output tube, with pairs delivering up to about 100 W continuously.

Base

—

Socket code

IO

Electrical Summary

Heater	6.3 V / 1.6 A
Plate	800 V / 35 W
Screen	300 V / 5 W
Ik max	300 mA

Sections

1

8 pins - IO - International Octal

Industrial beam tetrode with 35-watt maximum anode dissipation, designed for stabilized power-supply applications and electronic control service.

Base

12BU

Socket code

B12C

Electrical Summary

Heater	12.6 V / 600 mA
Plate	S1: 165 V / 6.5 W
Screen	S1: 150 V / 1.8 W

Sections

2

12 pins - B12C - Duodecar 12-contact

Compactron dissimilar double pentode; the available reference does not reproduce enough application detail to justify a narrower functional classification.

Base

—

Socket code

B7G

Electrical Summary

Heater	12.6 V / 450 mA
Plate	330 V / 12 W
Screen	250 V / 2.5 W
rP	7,500 Ω
gm	17 mA/V
μ	13

Sections

1

9 pins - B7G - Miniature 7-contact

High-perveance beam-power audio-output pentode with high power sensitivity, capable of Class-A service and substantially greater output in push-pull Class-AB operation.

Base

7AC

Socket code

IO

Electrical Summary

Heater	12.6 V / 600 mA
Plate	200 V / 10 W
Screen	125 V / 1.25 W
rP	28,000 Ω
gm	8 mA/V

Sections

1

8 pins - IO - International Octal

Beam pentode for 600 mA series-heater receivers, designed as a sensitive output tube capable of useful audio power from relatively low supply voltage.

Base

12EZ

Socket code

B12C

Electrical Summary

Heater	12.6 V / 450 mA

Sections

2

12 pins - B12C - Duodecar 12-contact

Combination tube integrating a beam-power output section with a sharp-cutoff dual-control pentode for television FM detection and audio-frequency power amplification.

Base

7AC

Socket code

IO

Electrical Summary

Heater	12.6 V / 225 mA
Plate	350 V / 14 W
Screen	315 V / 2.2 W
Ik max	50 mA
rP	50,000 Ω
gm	4.1 mA/V

Sections

1

8 pins - IO - International Octal

Beam-power output tube designed for automobile, battery-operated, and conventional radio receivers, with documented Class-A and push-pull audio power operation.

Base

Refer to variations

Socket code

Refer to variations

Electrical Summary

Heater	26 V / 1.3 A
Plate	800 V / 90 W
Screen	300 V / 10 W
Ik max	800 mA
rP	130 Ω
gm	35 mA/V
μ	4.5

Sections

1

7 pins

Low-impedance industrial beam tetrode with center-tapped heater, designed for general DC control applications and capable of triode-connected operation with high anode dissipation.

Base

—

Socket code

—

Electrical Summary

Heater	26 V / 1.3 A
Plate	800 V / 90 W
Screen	300 V / 10 W
Ik max	800 mA
rP	110 Ω
gm	25 mA/V
μ	2.8

Sections

1

7 pins

Industrial beam tetrode with center-tapped heater intended for stabilized power supplies, servo mechanisms, and related electronic control applications.

Base

Refer to variations

Socket code

B12C

Electrical Summary

Heater	13.2 V / 450 mA
Plate	S1: 330 V / 2.5 WS2: 330 V / 10 W
Screen	S1: 110 VS2: 275 V / 2 W
Ik max	S1: 13 mAS2: 13 A
rP	S1: 100,000 ΩS2: 100,000 Ω
gm	S1: 6.5 mA/VS2: 6.5 mA/V

Sections

2

12 pins - B12C - Duodecar 12-contact

Duodecar combination tube integrating limiter, discriminator, and audio power-output functions for FM radio and television receivers, including 10.7 MHz discriminator operation.

Base

—

Socket code

IO

Electrical Summary

Heater	13 V / 750 mA
Plate	250 V / 6 W
gm	7.5 mA/V

Sections

1

8 pins - IO - International Octal

Beam tetrode documented in bilingual Russian technical literature; available source establishes its tetrode construction but does not clearly support a narrower functional application.

Base

12EZ

Socket code

B12C

Electrical Summary

Heater	13.2 V / 450 mA
Plate	S1: 165 V / 6.5 WS2: 330 V / 1.7 W
Screen	S1: 150 V / 1.8 WS2: 33 V / 1.1 W
Ik max	S1: 65 mA
rP	S1: 58,000 ΩS2: 150,000 Ω
gm	S1: 6.4 mA/VS2: 1 mA/V

Sections

2

12 pins - B12C - Duodecar 12-contact

Duodecar combination tube for television FM detection and audio-frequency output amplification, pairing a detector pentode with a beam-power audio-output section.

Base

Refer to variations

Socket code

B12C

Electrical Summary

Heater	13.2 V / 450 mA
Plate	S1: 250 V / 10 WS2: 250 V / 10 W
Screen	S1: 330 VS2: 330 V
gm	S1: 0.36 mA/VS2: 0.36 mA/V

Sections

2

12 pins - B12C - Duodecar 12-contact

Duodecar combination tube for FM radio and television receivers, integrating limiter/discriminator functions with a beam-power audio-output stage.

Base

6AA

Socket code

LOCTAL8

Electrical Summary

Heater	12.6 V / 225 mA
Plate	315 V / 12 W
Screen	285 V / 2 W
rP	77,000 Ω
gm	3.75 mA/V

Sections

1

8 pins - LOCTAL8 - Loctal 8-contact base

Series-heater beam-power output pentode corresponding to the 7C5 family, designed for receiver output stages with high power sensitivity at comparatively low supply voltage.

Base

—

Socket code

B7G

Electrical Summary

Heater	6.3 V / 900 mA
Plate	450 V / 21 W
Screen	250 V / 3.5 W
gm	6.06 mA/V

Sections

1

7 pins - B7G - Miniature 7-contact

Beam-power transmitting tube for audio- and radio-frequency power service, including communications and emergency broadcast applications, with substantial Class-C output capability.

Base

—

Socket code

B9A

Electrical Summary

Heater	2.5 V / 2 A
Plate	400 V / 15 W
Screen	300 V / 3.5 W
gm	4.5 mA/V

Sections

1

7 pins - B9A - Small-button Noval 9-contact

Quick-heating beam-power transmitting tube for RF amplification, modulation, and audio power service, with published Class-A, Class-AB2, and Class-C operating conditions.

Base

7AC

Socket code

B9A

Electrical Summary

Heater	6.3 V / 900 mA
Plate	300 V / 13.8 W
Screen	250 V / 1.4 W
rP	4,000 Ω
gm	4 mA/V

Sections

1

7 pins - B9A - Small-button Noval 9-contact

6L6-related octal beam-power output tube documented for push-pull Class-A1 audio service, producing about 10 watts from two tubes at the published operating point.

Base

Refer to variations

Socket code

Refer to variations

Electrical Summary

Heater	2.5 V / 2 A
Plate	600 V / 25 W
Screen	300 V / 3.5 W
gm	4 mA/V

Sections

1

Filamentary-cathode beam-power transmitting tube with high power sensitivity, designed for radio-frequency service and push-pull audio power amplification.

Base

—

Socket code

U7B

Electrical Summary

Heater	12.6 V / 450 mA
Plate	750 V / 30 W
Screen	250 V / 3.5 W
μ	8

Sections

1

U7B - Medium 7-contact

Beam-power transmitting tube intended for RF power amplification and oscillator service, also capable of high-power push-pull Class-AB audio operation.

Base

7AC

Socket code

B9A

Electrical Summary

Heater	12.6 V / 450 mA
Plate	360 V / 16 W
Screen	270 V / 2.5 W

Sections

1

7 pins - B9A - Small-button Noval 9-contact

6L6-related beam-power output tube with a 12.6-volt heater, documented for push-pull Class-AB1 audio service with roughly 18 to 26.5 watts output.

Base

—

Socket code

B9A

Electrical Summary

Heater	16 V / 300 mA
Plate	S2: 2,000 V
μ	S1: 18

Sections

2

B9A - Small-button Noval 9-contact

Combined triode and beam-output tetrode for television service, with the power section rated for high positive anode pulses characteristic of deflection operation.

Base

—

Socket code

B12C

Electrical Summary

Heater	16.8 V / 450 mA
Plate	S1: 330 V / 1.7 WS2: 165 V / 6.5 W
Screen	S1: 330 V / 1.1 WS2: 150 V / 1.8 W
Ik max	S2: 65 mA
rP	S1: 150,000 ΩS2: 150 Ω
gm	S1: 1 mA/VS2: 8.6 mA/V

Sections

2

12 pins - B12C - Duodecar 12-contact

Combination dual-control sharp-cutoff pentode and beam-power section for television FM detection and audio-frequency output amplification, with about 2.4 watts maximum-signal output.

Base

12EZ

Socket code

B12C

Electrical Summary

Heater	16.8 V / 450 mA
Plate	S1: 330 V / 1.7 WS2: 165 V / 6.5 W
Screen	S1: 330 V / 1.1 WS2: 150 V / 1.8 W

Sections

2

12 pins - B12C - Duodecar 12-contact

Dual-pentode television tube with insufficient surviving source description in the available record to support a narrower functional classification.

Base

7BZ

Socket code

B8G

Electrical Summary

Heater	18.9 V / 150 mA
Plate	250 V / 12 W
Screen	200 V / 2 W
rP	52,000 Ω
gm	4.1 mA/V

Sections

1

7 pins - B8G - Loctal 8-contact

19-volt-heater miniature output beam tetrode documented for Class-A power amplification, with operating points providing approximately two to 4.5 watts output.

Base

—

Socket code

IO

Electrical Summary

Heater	1.4 V / 100 mA
rP	S2: 240,000 Ω
gm	S1: 1.15 mA/VS2: 0.275 mA/V

Sections

3

8 pins - IO - International Octal

Directly heated portable-receiver combination tube containing diode detector, triode audio voltage amplifier, and beam-power output sections for compact battery-operated radios.

Base

—

Socket code

—

Electrical Summary

Heater	1.6 V / 1.8 A
Plate	S1: 18 WS2: 18 W
gm	S1: 5 mA/VS2: 5 mA/V

Sections

2

Base

—

Socket code

IO

Electrical Summary

Heater	1.4 V / 100 mA
Plate	110 V
Screen	110 V
Ik max	12 mA
gm	2.2 mA/V

Sections

1

7 pins - IO - International Octal

Low-drain battery beam-power amplifier designed for portable audio-output service, with published output around a quarter watt under typical operating conditions.

Base

6AF

Socket code

IO

Electrical Summary

Heater	1.4 V / 100 mA
Plate	110 V
Screen	110 V
Ik max	12 mA
rP	90,000 Ω
gm	2.2 mA/V

Sections

1

7 pins - IO - International Octal

Beam-power output tube for low-voltage battery-operated audio amplifiers, delivering roughly a quarter watt in typical Class-A operation.

Base

6X

Socket code

IO

Electrical Summary

Heater	1.4 V / 50 mA
Plate	110 V
Screen	110 V
Ik max	7.3 mA
rP	250,000 Ω
gm	1.15 mA/V

Sections

1

7 pins - IO - International Octal

Beam-power amplifier designed for low-voltage battery-operated audio-output service, with published Class-A operation producing approximately 0.17 watt.

Base

9QU

Socket code

B9E

Electrical Summary

Heater	22 V / 450 mA
Plate	900 V / 28 W
Screen	220 V / 2 W
Ik max	950 mA
rP	6,000 Ω
gm	9.5 mA/V
μ	4

Sections

1

9 pins - B9E - Novar 9-contact

High-dissipation beam-power tube designed for high-voltage pulse and shunt-regulator applications in color television receivers.

Base

—

Socket code

B12C

Electrical Summary

Heater	24.2 V / 315 mA
Plate	S1: 165 V / 6.5 WS2: 330 V / 1.7 W
Screen	S1: 150 V / 1.8 WS2: 330 V / 1.1 W
Ik max	S1: 65 mA
rP	S1: 30,000 ΩS2: 150,000 Ω
gm	S1: 8.6 mA/VS2: 1 mA/V

Sections

2

12 pins - B12C - Duodecar 12-contact

Combination dual-control sharp-cutoff pentode and beam-power section for television FM detection and audio-frequency output amplification, with about 2.4 watts maximum-signal output.

Base

7AC

Socket code

—

Electrical Summary

Heater	25 V / 300 mA
Plate	200 V / 12.5 W
Screen	135 V / 1.75 W
rP	18,300 Ω
gm	7.1 mA/V

Sections

1

7 pins

Beam-power amplifier designed for relatively low-voltage output service, with a 12.5-watt plate-dissipation rating and published Class-A operation.