Electronic tube and vacuum tube catalog

Base

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Socket code

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Electrical Summary

Heater	1.2 V / 120 mA

Sections

2

Base

7BC

Socket code

B7G

Electrical Summary

Heater	2.8 V / 110 mA
Plate	S1: 135 V / 1 WS2: 135 V / 1 W
Ik max	S1: 15 mAS2: 15 mA
rP	S1: 8,300 ΩS2: 8,300 Ω
gm	S1: 1.8 mA/VS2: 1.8 mA/V
μ	S1: 15S2: 15

Sections

2

7 pins - B7G - Miniature 7-contact

Directly heated high-frequency twin triode intended for portable or battery equipment, usable as an RF amplifier or oscillator and capable of about 2 W push-pull Class-C RF output at 40 MHz.

Base

9H

Socket code

B9A

Electrical Summary

Heater	12.6 V / 450 mA
Plate	S1: 330 V / 4.2 WS2: 330 V / 4.2 W
rP	S1: 2,000 ΩS2: 2,000 Ω
gm	S1: 8.5 mA/VS2: 8.5 mA/V
μ	S1: 17S2: 17

Sections

2

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

High-perveance medium-mu double triode with independent sections and series/parallel heater operation, intended for general amplifier service and also carrying published pulse ratings.

Base

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Socket code

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Electrical Summary

Heater	6.3 V / 850 mA
Plate	S1: 250 V / 4 WS2: 250 V / 4 W
Ik max	S1: 100 mAS2: 100 mA
gm	S1: 18 mA/VS2: 18 mA/V
μ	S1: 15S2: 15

Sections

2

Russian high-current, low-plate-resistance twin triode in an enhanced-reliability version, intended for broadband amplification and demanding electronic service with extended operating life.

Base

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Socket code

B9A

Electrical Summary

Heater	6.3 V / 810 mA
Plate	S1: 250 V / 4 WS2: 250 V / 4 W
Ik max	S1: 100 mAS2: 100 mA
gm	S1: 18 mA/VS2: 18 mA/V
μ	S1: 15S2: 15

Sections

2

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

Russian high-current twin triode in a reliability-qualified version, combining low plate resistance and high transconductance for broadband amplifier and demanding electronic applications.

Base

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Socket code

B9A

Electrical Summary

Heater	6.3 V / 850 mA
Plate	S1: 250 V / 4 WS2: 250 V / 4 W
Ik max	S1: 100 mAS2: 100 mA
gm	S1: 18 mA/VS2: 18 mA/V
μ	S1: 15S2: 15

Sections

2

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

Russian high-current twin triode in an extended-life, high-reliability version, intended for broadband amplification and severe-duty electronic service.

Base

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Socket code

B9A

Electrical Summary

Heater	40 V / 130 mA
Plate	S1: 330 V / 4.75 WS2: 330 V / 4.75 W
Ik max	S1: 65 mAS2: 65 mA
rP	S1: 3,000 ΩS2: 3,000 Ω
gm	S1: 11.5 mA/VS2: 11.5 mA/V

Sections

2

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

General-purpose medium-mu high-current double triode, electrically equivalent to the 5687 family, with independent sections and a series/parallel heater arrangement.

Base

Miniature

Socket code

B7G

Electrical Summary

Heater	6.3 V / 450 mA
Plate	S1: 300 V / 1.5 WS2: 300 V / 1.5 W
Ik max	S1: 22 mAS2: 22 mA
rP	S1: 7,100 ΩS2: 7,100 Ω
gm	S1: 5.3 mA/VS2: 5.3 mA/V
μ	S1: 38S2: 38

Sections

2

7 pins - B7G - Miniature 7-contact

Common-cathode VHF double triode for RF power amplification, oscillator, mixer, and frequency-multiplier service, capable of several watts RF output and operation to roughly 250 MHz.

Base

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Socket code

MEDIUM7

Electrical Summary

Heater	6.3 V / 600 mA
Plate	S1: 250 V / 2.5 WS2: 250 V / 2.5 W
rP	S1: 8,750 ΩS2: 8,750 Ω
gm	S1: 1.2 mA/VS2: 1.2 mA/V
μ	S1: 10.5S2: 10.5

Sections

2

7 pins - MEDIUM7 - Medium 7-contact transmitting-tube base

Twin triode designed for RF power-amplifier and oscillator service, with two similar systems and published Class-C output capability to approximately 60 MHz.