Electronic tube and vacuum tube catalog

Base

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Socket code

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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

8BU

Socket code

IO

Electrical Summary

Heater	26.5 V / 600 mA
Plate	S1: 50 V / 2 WS2: 50 V
Screen	S1: 50 V / 0.5 W
gm	S1: 5.7 mA/VS2: 5.7 mA/V

Sections

2

8 pins - IO - International Octal

Twin beam-power amplifier designed for push-pull or parallel output service in aircraft and mobile equipment operating from approximately 28-volt heater and plate supplies.

Base

8BS

Socket code

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Electrical Summary

Heater	28 V / 400 mA
Plate	S1: 100 VS2: 100 V
Screen	S1: 67.5 VS2: 67.5 V
rP	S1: 4,200 ΩS2: 4,200 Ω
gm	S1: 3.4 mA/VS2: 3.4 mA/V

Sections

2

8 pins

Double beam-power amplifier with a 28-volt heater, providing two power sections for output-amplifier applications according to the supplied receiving-tube handbook.

Base

8BS

Socket code

—

Electrical Summary

Heater	28 V / 400 mA
Plate	S1: 100 V / 3 WS2: 100 V / 3 W
Screen	S1: 67.5 V / 0.5 WS2: 67.5 V / 0.5 W
rP	S1: 4,200 ΩS2: 4,200 Ω
gm	S1: 3.4 mA/VS2: 3.4 mA/V

Sections

2

8 pins

Sylvania 28D7W rugged low-voltage dual beam-power output tube for aircraft and mobile audio amplifiers and control equipment, with 28 V 400 mA heater and 8BS locking base.

Base

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Socket code

SEPTAR7

Electrical Summary

Heater	6.3 V / 1.6 A
Plate	S1: 600 V / 35 WS2: 600 V / 35 W
Screen	S1: 225 VS2: 225 V

Sections

2

SEPTAR7 - Septar 7-contact base

Twin beam-power transmitting tube designed for push-pull RF power-amplifier and oscillator service in mobile equipment, with full ratings through approximately 15 MHz.

Base

Refer to variations

Socket code

SEPTAR7

Electrical Summary

Heater	6.3 V / 1.6 A
Plate	S1: 600 V / 35 WS2: 600 V / 35 W
Screen	S1: 225 VS2: 225 V

Sections

2

SEPTAR7 - Septar 7-contact base

Twin beam-power transmitting tube intended for push-pull RF power-amplifier and oscillator service, combining two power sections in one envelope.

Base

—

Socket code

B9A

Electrical Summary

Heater	6.3 V / 1.25 A
Plate	S1: 600 V / 25 WS2: 600 V / 25 W
Screen	S1: 300 VS2: 300 V
gm	S1: 4.5 mA/VS2: 4.5 mA/V
μ	S1: 8.5S2: 8.5

Sections

2

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

Beam-power output tube intended for substantial audio-frequency or general power-amplifier service, combining high current capability with useful plate dissipation.

Base

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Socket code

B9A

Electrical Summary

Heater	12.6 V / 625 mA
Plate	S1: 600 V / 25 WS2: 600 V / 25 W
Screen	S1: 300 VS2: 300 V
gm	S1: 4.5 mA/VS2: 4.5 mA/V
μ	S1: 8.5S2: 8.5

Sections

2

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

Twin beam-power transmitting tube for AF/RF amplification, oscillation, modulation, and frequency-tripler service, with reduced-input operation extending to about 470 MHz.

Base

7E-UA

Socket code

B9A

Electrical Summary

Heater	12.6 V / 3.6 A
Plate	S1: 800 V / 60 WS2: 800 V / 60 W
Screen	S1: 350 V / 15 WS2: 350 V / 15 W

Sections

2

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

Beam-power audio-output tube intended for substantial low-frequency power amplification, providing high current and useful output for professional or consumer amplifier equipment.

Base

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Socket code

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Electrical Summary

Heater	12.6 V / 800 mA
Plate	S1: 425 V / 10 WS2: 425 V / 10 W
Screen	S1: 5 WS2: 5 W

Sections

2

Twin beam-power transmitting tube containing two power units in one envelope, designed primarily for push-pull Class-C RF power amplification.

Base

7E-UA

Socket code

SEPTAR7

Electrical Summary

Heater	12.6 V / 800 mA
Plate	S1: 750 V / 20 WS2: 750 V / 20 W
Screen	S1: 250 V / 5 WS2: 250 V
Ik max	S1: 115 mAS2: 115 mA
gm	S1: 3.5 mA/VS2: 3.5 mA/V
μ	S1: 6.5S2: 6.5

Sections

2

7 pins - SEPTAR7 - Septar 7-contact base

Twin beam-power tube with center-tapped heater for RF power-amplifier and oscillator service at frequencies to approximately 200 MHz.

Base

9QR

Socket code

B9A

Electrical Summary

Heater	1.9 V / 3.15 A
Plate	S1: 250 V / 7.5 WS2: 250 V / 7.5 W
Screen	S1: 200 V / 3.5 WS2: 200 V / 3.5 W
Ik max	S1: 120 mAS2: 120 mA
gm	S1: 10 mA/VS2: 10 mA/V

Sections

2

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

Fast-warm-up miniature twin beam-power tube designed for push-pull RF power amplification and frequency multiplication at frequencies to approximately 500 MHz.

Base

E7-2

Socket code

SEPTAR7

Electrical Summary

Heater	12.6 V / 650 mA
Plate	S1: 600 V / 10 WS2: 600 V / 10 W
Screen	S1: 300 V / 1.5 WS2: 300 V / 1.5 W
Ik max	S1: 120 mAS2: 120 mA
gm	S1: 2.5 mA/VS2: 2.5 mA/V
μ	S1: 8S2: 8

Sections

2

7 pins - SEPTAR7 - Septar 7-contact base

VHF double tetrode with center-tapped heater, designed for push-pull Class-C RF power amplification with approximately 48 watts output.

Base

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Socket code

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Electrical Summary

Heater	12.6 V / 1.125 A
Plate	S1: 750 V / 20 WS2: 750 V / 20 W
Screen	S1: 225 VS2: 225 V
gm	S1: 9 mA/VS2: 9 mA/V

Sections

2

Twin beam tetrode designed for push-pull high-frequency power amplification, with operation extending to approximately 200 MHz.

Base

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Socket code

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Electrical Summary

Heater	12.6 V
Plate	S1: 5,000 VS2: 5,000 V

Sections

2

Russian double beam-power tetrode designed for pulse-operation circuits in radio-frequency equipment.

Base

—

Socket code

—

Electrical Summary

Heater	12.6 V / 1.2 A
Plate	S1: 4,000 VS2: 4,000 V
Screen	S1: 800 VS2: 800 V
Ik max	S1: 15 AS2: 15 A

Sections

2

Russian double beam-power tetrode designed specifically for pulse-modulator service.

Base

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Socket code

—

Electrical Summary

Heater	6.3 V
Plate	S1: 400 V / 12 WS2: 400 V / 12 W
Ik max	S1: 100 mAS2: 100 mA

Sections

2

Russian double beam-power tetrode designed for RF generation and amplification at frequencies extending to approximately 250 MHz.

Base

—

Socket code

B7G

Electrical Summary

Heater	12.6 V
Plate	S1: 750 V / 40 WS2: 750 V / 40 W
Screen	S1: 225 VS2: 225 V

Sections

2

7 pins - B7G - Miniature 7-contact

Forced-air-cooled Russian double beam-power tetrode intended for high-power radio-frequency transmitting applications.

Base

—

Socket code

B7A

Electrical Summary

Heater	12.6 V / 1.6 A
Plate	S1: 500 V / 15 WS2: 500 V / 15 W
Screen	S1: 250 V / 5 WS2: 250 V / 5 W
gm	S1: 3.5 mA/VS2: 3.5 mA/V

Sections

2

7 pins - B7A - Septar 7-contact

Low-power Russian dual transmitting tetrode for RF amplifiers, oscillators, AF/RF modulators, and frequency-multiplier service.

Base

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Socket code

B7G

Electrical Summary

Heater	12.6 V
Plate	S1: 500 V / 15 WS2: 500 V / 15 W
Screen	S1: 250 VS2: 250 V

Sections

2

7 pins - B7G - Miniature 7-contact

Russian double beam-power tetrode intended for transmitting and radio-frequency power applications.

Base

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Socket code

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Electrical Summary

Heater	6.3 V / 2.25 A
Plate	S1: 800 V / 20 WS2: 800 V / 20 W
Screen	S1: 250 V / 4 WS2: 250 V / 4 W
gm	S1: 7.5 mA/VS2: 7.5 mA/V

Sections

2

Dual beam-power transmitting tetrode for oscillator, frequency-multiplier, driver, and final RF-amplifier service to approximately 250 MHz.

Base

—

Socket code

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Electrical Summary

Heater	6.3 V / 2.5 A
Plate	S1: 800 V / 20 WS2: 800 V / 20 W
Screen	S1: 250 V / 4 WS2: 250 V / 4 W
gm	S1: 8 mA/VS2: 8 mA/V

Sections

2

Dual beam-power transmitting tetrode for oscillator, frequency-multiplier, balanced-driver, and final RF-amplifier service to approximately 480 MHz.

Base

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Socket code

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Electrical Summary

Heater	6.3 V / 1.6 A
Plate	S1: 400 V / 75 WS2: 400 V / 75 W
Screen	S1: 200 V / 1.25 WS2: 200 V / 1.25 W
gm	S1: 3.9 mA/VS2: 3.9 mA/V

Sections

2

Twin beam tetrode with two equivalent systems for push-pull VHF RF power amplification and audio service, with reduced-input operation extending to approximately 250 MHz.

Base

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Socket code

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Electrical Summary

Plate	S1: 3.5 WS2: 3.5 W
rP	S1: 2,500 ΩS2: 2,500 Ω
gm	S1: 7 mA/VS2: 7 mA/V

Sections

2

Tungsram all-stage twin beam tetrode whose sections can serve RF, IF, mixer, detector, or power-amplifier functions, making it an unusually multifunctional receiving valve.