Electronic tube and vacuum tube catalog

Base

9CV

Socket code

B9A

Electrical Summary

Heater	10.5 V / 450 mA
Plate	300 V / 12 W
Screen	300 V / 2 W
Ik max	65 mA
rP	38,000 Ω
gm	11.3 mA/V

Sections

1

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

Miniature audio-output power pentode electrically equivalent to 6BQ5/EL84 except for heater rating. Designed for the output stage of audio-frequency amplifiers, it provides substantial power from compact nine-pin construction.

Base

—

Socket code

B9A

Electrical Summary

Heater	10 V / 450 mA
Plate	330 V / 13.2 W
Screen	330 V
Ik max	65 mA
rP	38,000 Ω
gm	11.3 mA/V

Sections

1

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

Miniature output pentode used in audio amplifier output stages and television video-output stages. Its power-capable construction supports both audio load drive and comparatively high-current wideband video service.

Base

9DX

Socket code

B9A

Electrical Summary

Heater	10.5 V / 450 mA
Plate	S1: 330 V / 5 WS2: 330 V / 1 W
Screen	S1: 330 V / 1.1 W
rP	S1: 60,000 ΩS2: 37,000 Ω
gm	S1: 11.5 mA/VS2: 2.7 mA/V
μ	S1: 100S2: 100

Sections

2

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

Miniature triode-pentode for television receivers. The triode serves sync-separator, sync-clipper, phase-inverter, or sound-IF functions, while the pentode provides video-output amplification.

Base

9LY

Socket code

B9A

Electrical Summary

Heater	11.6 V / 450 mA
Plate	S1: 250 V / 0.5 WS2: 250 V / 7 W
Screen	S2: 250 V / 2 W
Ik max	S1: 200 mAS2: 75 mA
rP	S1: 7,600 ΩS2: 25,000 Ω
gm	S1: 6.5 mA/VS2: 7.5 mA/V
μ	S1: 50S2: 50

Sections

2

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

Miniature triode-pentode for television sync-amplifier and video-output applications. It is electrically equivalent to related ECL85-family types except for heater rating, combining small-signal control and output functions.

Base

—

Socket code

B9A

Electrical Summary

Heater	45 V / 100 mA
Plate	250 V / 12 W
Screen	200 V / 1.75 W
Ik max	100 mA
rP	23,000 Ω
gm	10 mA/V

Sections

1

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

Output pentode designed for audio power stages in AC/DC mains-powered equipment. Its heater and output characteristics suit transformerless receivers requiring a dedicated low-frequency power amplifier.

Base

—

Socket code

B9A

Electrical Summary

Heater	50 V / 100 mA
Plate	S1: 250 V / 7 WS2: 250 V / 1 W
Screen	S1: 250 V / 1.8 W
Ik max	S1: 50 mAS2: 15 mA
gm	S1: 6.4 mA/VS2: 2.5 mA/V
μ	S1: 9.5S2: 70

Sections

2

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

Beam-power output valve intended for audio-frequency power amplification in television and radio receivers, using a heater suited to series-connected receiver supplies.

Base

12BT

Socket code

B12C

Electrical Summary

Heater	10 V / 600 mA
Plate	S1: 330 VS2: 275 V / 10 W
Screen	S1: 330 VS2: 275 V / 2 W
Ik max	S1: 13 mA
rP	S2: 100,000 Ω
gm	S1: 0.7 mA/VS2: 6.5 mA/V

Sections

2

12 pins - B12C - Duodecar 12-contact

Beam-power receiving tube intended primarily for audio-frequency output service in television or radio equipment using series-connected heater supplies.

Base

—

Socket code

—

Electrical Summary

Heater	11.6 V / 450 mA
Plate	S1: 250 V / 5.1 WS2: 250 V / 1.5 W
Screen	S1: 250 V / 2.5 WS2: 250 V / 0.5 W
Ik max	S1: 60 mAS2: 15 mA
rP	S1: 32,000 ΩS2: 160,000 Ω
gm	S1: 22 mA/VS2: 8.5 mA/V

Sections

2

10 pins

Miniature dual-pentode television tube combining a high-current video-output section with a lower-power section for sound IF, AGC, or sync-separator service, integrating multiple television signal functions in one envelope.

Base

9DX

Socket code

B9A

Electrical Summary

Heater	10.9 V / 450 mA
Plate	S1: 300 V / 2 WS2: 300 V / 5 W
Screen	S2: 300 V / 1 W
rP	S1: 20,000 ΩS2: 75,000 Ω
gm	S1: 4 mA/VS2: 23 mA/V
μ	S1: 100

Sections

2

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

Miniature triode-pentode for television voltage amplification, sync separation, sound IF, and video output. Its pentode section uses frame-grid construction for high-transconductance wideband output service.

Base

9DX

Socket code

B9A

Electrical Summary

Heater	10.9 V / 450 mA
Plate	S1: 300 V / 2 WS2: 300 V / 5 W
Screen	S2: 300 V / 1 W
rP	S1: 4,400 ΩS2: 75,000 Ω
gm	S1: 10.4 mA/VS2: 23 mA/V
μ	S1: 35

Sections

2

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

Miniature triode-pentode for television receivers. The triode serves sync-separator or sound-IF functions while the pentode provides video-output amplification, combining control and output stages in one tube.

Base

—

Socket code

B9A

Electrical Summary

Heater	12.6 V / 225 mA
Plate	315 V / 12 W
Screen	285 V / 2 W
gm	4.1 mA/V

Sections

1

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

Beam-power output tube intended for audio-frequency amplification in television and radio equipment, providing moderate output power from low-voltage receiving-tube supplies.

Base

—

Socket code

B9A

Electrical Summary

Heater	12.6 V / 225 mA
Plate	S1: 150 V / 0.75 WS2: 150 V / 6.5 W
Screen	S2: 135 V / 1.5 W
Ik max	S1: 5 mAS2: 60 mA
rP	S1: 5,500 ΩS2: 250,000 Ω
gm	S1: 7.5 mA/VS2: 6 mA/V
μ	S1: 40

Sections

2

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

Triode-pentode electrically equivalent to related 6DZ8-family versions except for heater rating. Manufacturer documentation defines a combined small-signal triode and pentode device rather than a single-section power pentode.

Base

—

Socket code

—

Electrical Summary

Heater	12 V / 300 mA
Plate	S1: 300 V / 12 WS2: 300 V / 12 W
Screen	S1: 300 V / 1.25 WS2: 300 V / 1.25 W
Ik max	S1: 40 mAS2: 40 mA

Sections

2

Twin output pentode, the 12-volt-heater designation of the 6HU8/12HU8 family. Two power-capable pentode sections are combined in one envelope for dual output-stage applications.

Base

—

Socket code

B9A

Electrical Summary

Heater	14.7 V / 300 mA
Plate	350 V / 10 W
Screen	300 V / 2 W
rP	24,000 Ω
gm	20 mA/V

Sections

1

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

Power pentode heater variant whose source explicitly references the corresponding 6-volt parent electrical characteristics; intended for power-output service in series-heater equipment.

Base

—

Socket code

IO

Electrical Summary

Heater	6.3 V / 700 mA

Sections

1

7 pins - IO - International Octal

Pentode intended for amplification or power-output service. Manufacturer documentation supplies electrical ratings, characteristics, operating conditions, capacitances, and construction details supporting general power-capable amplifier operation.

Base

—

Socket code

IO

Electrical Summary

Heater	6.3 V / 700 mA
Plate	350 V / 10 W
Screen	275 V / 2.5 W
gm	2.5 mA/V

Sections

1

7 pins - IO - International Octal

RCA heater-cathode RF power pentode designed for transmitting service. Its manufacturer ratings are intended for radio-frequency power generation or amplification rather than ordinary receiving or audio-output use.

Base

8BU

Socket code

—

Electrical Summary

Heater	12.6 V / 150 mA
Plate	S1: 180 VS2: 180 V
Screen	S1: 180 VS2: 180 V
rP	S1: 160,000 ΩS2: 160,000 Ω
gm	S1: 2.15 mA/VS2: 2.15 mA/V

Sections

2

8 pins

Special-quality twin-pentode power amplifier related to the 12L8GT family, intended for dependable power-amplifier service.

Base

9GK

Socket code

B9A

Electrical Summary

Heater	16 V / 300 mA
Plate	330 V / 13.2 W
Screen	330 V / 2 W
Ik max	65 mA
rP	38,000 Ω
gm	11.2 mA/V

Sections

1

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

High-transconductance power pentode for audio-output and television video-output stages, with approximately 13.2 W plate dissipation.

Base

Refer to variations

Socket code

B12C

Electrical Summary

Heater	16.8 V / 450 mA
Plate	S1: 330 VS2: 165 V / 6.45 W
Screen	S1: 110 VS2: 150 V / 1.8 W
Ik max	S1: 13 mAS2: 65 mA
rP	S2: 30,000 Ω
gm	S2: 8.6 mA/V

Sections

2

B12C - Duodecar 12-contact

Dual-pentode television sound tube combining gated-beam FM limiter/discriminator service with a separate audio power-output pentode.

Base

—

Socket code

B10B

Electrical Summary

Heater	16.5 V / 300 mA
Plate	S1: 250 V / 5 WS2: 250 V / 1.5 W
Screen	S1: 250 V / 2.5 WS2: 250 V / 0.5 W
Ik max	S1: 60 mAS2: 15 mA
rP	S1: 40,000 ΩS2: 160,000 Ω
gm	S1: 21 mA/VS2: 8.5 mA/V

Sections

2

10 pins - B10B - Decal 10-contact

Dissimilar dual pentode for television receivers, combining a high-transconductance video-output section with a signal pentode for sound IF, AGC, or sync separation.

Base

—

Socket code

UX6

Electrical Summary

Heater	14 V / 300 mA
Plate	250 V
Screen	250 V
rP	80,000 Ω
gm	2.5 mA/V

Sections

1

6 pins - UX6 - Small 6-contact

Indirectly heated power pentode similar to types 2A5 and 42, intended for conventional audio-frequency output service with a 14 V heater.

Base

12E2

Socket code

B12C

Electrical Summary

Heater	18 V / 315 mA
Plate	S1: 165 V / 6 WS2: 300 V / 1.7 W
Screen	S1: 150 V / 1.26 WS2: 1 W
Ik max	S1: 60 mA
rP	S1: 33,000 ΩS2: 180,000 Ω
gm	S1: 5.6 mA/VS2: 2.4 mA/V

Sections

2

12 pins - B12C - Duodecar 12-contact

Compactron combining a dual-control FM detector pentode with a separate audio power pentode for television sound output.

Base

—

Socket code

B9A

Electrical Summary

Heater	18 V / 300 mA
Plate	S1: 150 V / 0.75 WS2: 150 V / 6.5 W
Screen	S2: 150 V / 1.5 W
Ik max	S2: 60 mA
gm	S1: 1.4 mA/VS2: 7.5 mA/V
μ	S1: 10

Sections

2

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

Miniature high-mu triode and power-pentode combination designed as a complete two-stage audio-frequency amplifier.

Base

9LY

Socket code

B9A

Electrical Summary

Heater	18 V / 300 mA
Plate	S1: 250 V / 0.5 WS2: 250 V / 7 W
Screen	S2: 250 V / 2 W
Ik max	S2: 75 mA
rP	S1: 7,600 ΩS2: 25,000 Ω
gm	S1: 6.5 mA/VS2: 7.5 mA/V
μ	S1: 50

Sections

2

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

High-mu triode and power-pentode combination for television sync amplification and video-output service.

Base

—

Socket code

B9A

Electrical Summary

Heater	18 V / 300 mA
Plate	S1: 150 V / 0.75 WS2: 150 V / 6.5 W
Screen	S2: 135 V / 1.4 W
Ik max	S1: 5 mAS2: 51 mA
gm	S1: 3.9 mA/VS2: 6.25 mA/V
μ	S1: 74

Sections

2

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

Triode-pentode designed for stereo and monaural audio equipment, integrating voltage amplification with approximately 1 W Class-A output.

Base

—

Socket code

IO

Electrical Summary

Heater	1.4 V / 50 mA
Plate	90 V
Screen	90 V
rP	300,000 Ω
gm	0.85 mA/V
μ	255

Sections

1

8 pins - IO - International Octal

Directly heated battery power pentode for very-low-consumption receiver audio output, producing roughly 0.1 W.

Base

6X

Socket code

IO

Electrical Summary

Heater	1.4 V / 50 mA
Plate	110 V
Screen	110 V
Ik max	6 mA
rP	300,000 Ω
gm	0.85 mA/V
μ	255

Sections

1

8 pins - IO - International Octal

Low-drain directly heated battery power pentode providing approximately 115 mW Class-A audio output from about 90 V.

Base

8CP

Socket code

IO

Electrical Summary

Heater	1.25 V / 40 mA
Plate	67.5 V
Screen	67.5 V
rP	150,000 Ω
gm	0.75 mA/V

Sections

1

8 pins - IO - International Octal

Ultra-low-power directly heated pentode for battery audio-output service from plate supplies as low as 45–67.5 V.

Base

512AX

Socket code

B7G

Electrical Summary

Heater	1.25 V / 40 mA
Plate	90 V
Screen	90 V
Ik max	4 mA
rP	180,000 Ω
gm	1 mA/V

Sections

1

7 pins - B7G - Miniature 7-contact

Subminiature directly heated power pentode for compact battery-operated receiver output stages.

Base

G-6X

Socket code

IO

Electrical Summary

Heater	1.4 V / 100 mA
Plate	110 V
Screen	110 V
Ik max	12 mA
rP	110,000 Ω
gm	1.5 mA/V

Sections

1

7 pins - IO - International Octal

Directly heated battery power pentode for low-voltage, low-current receiver audio-output service.

Base

G-6X

Socket code

IO

Electrical Summary

Heater	1.4 V / 100 mA
Plate	110 V
Screen	110 V
Ik max	12 mA
rP	110,000 Ω
gm	1.5 mA/V

Sections

1

7 pins - IO - International Octal

Glass tubular directly heated power pentode for low-voltage battery receiver output stages.

Base

6X

Socket code

IO

Electrical Summary

Heater	2 V / 120 mA
Plate	135 V
Screen	135 V
rP	105,300 Ω
gm	0.95 mA/V
μ	100

Sections

1

7 pins - IO - International Octal

Directly heated battery power pentode capable of roughly 0.45 W Class-A audio output from approximately 135 V.

Base

—

Socket code

IO

Electrical Summary

Heater	2 V / 240 mA
Plate	180 V
Screen	180 V

Sections

1

7 pins - IO - International Octal

Directly heated power-amplifier pentode for conventional battery-operated receiver output service.

Base

5AD

Socket code

B8G

Electrical Summary

Heater	1.4 V / 50 mA
Plate	110 V
Screen	110 V
rP	300,000 Ω
gm	0.85 mA/V

Sections

1

8 pins - B8G - Loctal 8-contact

Low-drain directly heated battery power pentode providing roughly 115 mW Class-A audio output.

Base

—

Socket code

B8G

Electrical Summary

Heater	1.4 V / 50 mA

Sections

1

8 pins - B8G - Loctal 8-contact

Special low-drain battery power pentode for portable receiver output stages where long battery life takes priority over high power.

Base

5AD

Socket code

B8G

Electrical Summary

Heater	1.4 V / 50 mA
Plate	110 V
Screen	110 V
Ik max	6 mA
rP	250,000 Ω
gm	0.925 mA/V

Sections

1

8 pins - B8G - Loctal 8-contact

Power/output pentode designed for Class-A, single-ended, or push-pull audio-frequency output amplification.

Base

—

Socket code

B7G

Electrical Summary

Heater	1.4 V / 100 mA
Plate	90 V
Screen	67.5 V

Sections

1

7 pins - B7G - Miniature 7-contact

Power/output pentode designed for Class-A, single-ended, or push-pull audio-frequency output amplification.

Base

7AV

Socket code

B7G

Electrical Summary

Heater	1.4 V / 100 mA
Plate	90 V
Screen	67.5 V
Ik max	11 mA
rP	100,000 Ω
gm	1.575 mA/V

Sections

1

7 pins - B7G - Miniature 7-contact

Power/output pentode designed for Class-A, single-ended, or push-pull audio-frequency output amplification.

Base

8CP

Socket code

B8D

Electrical Summary

Heater	1.25 V / 40 mA
Plate	100 V
Screen	100 V
rP	150,000 Ω
gm	0.75 mA/V

Sections

1

8 pins - B8D - Subminiature 8-lead

Power/output pentode designed for Class-A, single-ended, or push-pull audio-frequency output amplification.

Base

—

Socket code

—

Electrical Summary

Heater	2 V / 120 mA
rP	200,000 Ω
gm	1.7 mA/V

Sections

1

Power/output pentode designed for Class-A, single-ended, or push-pull audio-frequency output amplification.

Base

—

Socket code

—

Electrical Summary

Heater	14 V / 300 mA
rP	50,000 Ω
gm	2.4 mA/V

Sections

1

Power/output pentode designed for Class-A, single-ended, or push-pull audio-frequency output amplification.

Base

—

Socket code

B5

Electrical Summary

Heater	2 V / 200 mA
Plate	150 V
Screen	150 V
gm	2.5 mA/V

Sections

1

5 pins - B5 - European 5-pin base

Power/output pentode designed for Class-A, single-ended, or push-pull audio-frequency output amplification.

Base

7S

Socket code

IO

Electrical Summary

Heater	25 V / 300 mA
Plate	200 V / 12.5 W
Screen	135 V / 2 W
rP	18,000 Ω
gm	5 mA/V

Sections

1

7 pins - IO - International Octal

Power/output pentode designed for Class-A, single-ended, or push-pull audio-frequency output amplification.

Base

6B

Socket code

UX6

Electrical Summary

Heater	2.5 V / 1.75 A
Plate	375 V / 11 W
Screen	285 V / 3.75 W
rP	80,000 Ω
gm	2.6 mA/V
μ	200

Sections

1

6 pins - UX6 - Small 6-contact

Power/output pentode designed for Class-A, single-ended, or push-pull audio-frequency output amplification.

Base

—

Socket code

UY5

Electrical Summary

Heater	6.3 V / 1.5 A
Plate	750 V / 30 W
Screen	250 V / 10 W
Ik max	110 mA

Sections

1

5 pins - UY5 - Medium 5-contact

Power pentode designed primarily for Class-C radio-frequency transmitting, amplifier, oscillator, or modulated RF service.

Base

—

Socket code

B7G

Electrical Summary

Heater	1.2 V / 120 mA
Plate	150 V
Screen	135 V / 0.9 W
Ik max	25 mA

Sections

1

7 pins - B7G - Miniature 7-contact

Power pentode designed for both audio/output amplification and radio-frequency power-amplifier service.

Base

—

Socket code

B7G

Electrical Summary

Heater	1.2 V / 120 mA
Plate	150 V
Screen	135 V / 0.9 W
Ik max	25 mA

Sections

1

7 pins - B7G - Miniature 7-contact

Power pentode designed for both audio/output amplification and radio-frequency power-amplifier service.

Base

—

Socket code

UX4

Electrical Summary

Heater	2.75 V / 2 A
Plate	300 V / 15 W
Screen	300 V
Ik max	60 mA
gm	4.05 mA/V

Sections

1

4 pins - UX4 - Medium-shell UX 4-contact

Power pentode designed primarily for Class-C radio-frequency transmitting, amplifier, oscillator, or modulated RF service.

Base

Refer to variations

Socket code

UX4

Electrical Summary

Heater	5.5 V / 1 A
Plate	500 V / 15 W
Screen	300 V / 6 W
Ik max	60 mA
gm	4 mA/V

Sections

1

4 pins - UX4 - Medium-shell UX 4-contact

Power pentode designed primarily for Class-C radio-frequency transmitting, amplifier, oscillator, or modulated RF service.

Base

—

Socket code

UX4

Electrical Summary

Heater	5 V / 250 mA
Plate	180 V / 50 W
rP	4,700 Ω
gm	1.8 mA/V
μ	8.5

Sections

1

4 pins - UX4 - Medium-shell UX 4-contact

Power pentode designed primarily for Class-C radio-frequency transmitting, amplifier, oscillator, or modulated RF service.