Electronic tube and vacuum tube catalog

Base

6AU

Socket code

B7G

Electrical Summary

Heater	1.4 V / 25 mA
Plate	S1: 110 V
Screen	S1: 110 V
Ik max	S1: 2.5 mA
rP	S1: 2,000,000 Ω
gm	S1: 0.6 mA/V

Sections

2

7 pins - B7G - Miniature 7-contact

Source mismatch prevents a defensible functional classification: the supplied manufacturer page does not contain a printed 1AF5 entry, so neighboring tube data were not inferred.

Base

6AU

Socket code

—

Electrical Summary

Heater	1.4 V / 25 mA
Plate	S2: 90 V
Screen	S2: 90 V

Sections

2

Directly heated battery diode-pentode combining radio signal detection with subsequent low-frequency voltage amplification. The diode recovers the received signal while the pentode provides AF gain in economical portable receivers.

Base

—

Socket code

—

Electrical Summary

Heater	1.2 V / 30 mA
Plate	S2: 90 V
Screen	S2: 67.5 V
Ik max	S2: 4.5 mA
gm	S2: 0.25 mA/V

Sections

2

Russian diode-pentode designed for low-frequency voltage preamplification and signal detection in receiving equipment.

Base

—

Socket code

B7G

Electrical Summary

Heater	1.4 V / 50 mA
Plate	S2: 90 V
Screen	S2: 90 V
Ik max	S1: 0.2 mAS2: 3 mA
rP	S2: 600,000 Ω
gm	S2: 0.625 mA/V

Sections

2

7 pins - B7G - Miniature 7-contact

Battery diode-pentode combining signal detection with subsequent voltage amplification. The diode supplies detector action while the pentode operates from low-voltage receiver supplies with an economical directly heated filament.

Base

7AM

Socket code

IO

Electrical Summary

Heater	1.4 V / 50 mA
Plate	S1: 110 V
Screen	S1: 110 V
rP	S1: 300,000 Ω
gm	S1: 0.8 mA/V

Sections

2

8 pins - IO - International Octal

Battery-receiver combination tube containing a detector diode and power-amplifier pentode for signal detection and audio output service.

Base

7AM

Socket code

—

Electrical Summary

Heater	1.4 V / 50 mA
Plate	S2: 110 V
Screen	S2: 110 V
rP	S2: 300,000 Ω
gm	S2: 0.8 mA/V

Sections

2

GT-envelope battery-receiver tube combining a detector diode with a power-amplifier pentode for detection and audio output service.

Base

—

Socket code

—

Electrical Summary

Heater	20 V / 100 mA
Plate	S2: 300 V / 3 W
Screen	S2: 0.6 W
rP	S2: 250,000 Ω
gm	S2: 3.8 mA/V

Sections

2

Diode and sharp-cutoff pentode for detection and IF amplification.

Base

9CY

Socket code

B9A

Electrical Summary

Heater	4.7 V / 600 mA
Plate	S2: 300 V / 2.8 W
Screen	S2: 300 V / 0.5 W
Ik max	S1: 5 mA
Rectifier	S1: 5 A
V Inverse	S1: 330 V
rP	S2: 600,000 Ω
gm	S2: 7 mA/V

Sections

2

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

High-perveance diode and sharp-cutoff pentode combination for television IF amplification, video detection, AGC, and DC-restorer service.

Base

9DB

Socket code

B9A

Electrical Summary

Heater	4.7 V / 600 mA
Plate	S2: 300 V / 2.5 W
Screen	S2: 300 V / 0.5 W
Rectifier	S1: 5 A
V Inverse	S1: 330 V
rP	S1: 300 ΩS2: 300,000 Ω
gm	S2: 6.2 mA/V

Sections

2

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

General-purpose combination of a high-perveance diode and sharp-cutoff pentode for receiver detector and amplifier applications.

Base

8FW

Socket code

Refer to variations

Electrical Summary

Heater	6.3 V / 200 mA
Plate	S2: 190 V / 0.75 W
Screen	S2: 190 V / 0.4 W
Ik max	S2: 10 mA
rP	S2: 100,000 Ω
gm	S2: 2.5 mA/V
μ	S2: 30

Sections

2

8 pins

Mullard diode-pentode with published amplifier characteristics; available documentation does not establish a sufficiently specific functional role for narrower classification.

Base

9CY

Socket code

B9A

Electrical Summary

Heater	6.3 V / 450 mA
Plate	S2: 300 V / 3.2 W
Screen	S2: 150 V / 0.55 W
Ik max	S1: 5 mA
rP	S2: 600,000 Ω
gm	S2: 7 mA/V

Sections

2

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

Miniature diode-pentode designed for combined television video-detector and final-IF amplifier service.

Base

9CY

Socket code

B9A

Electrical Summary

Heater	6.3 V / 450 mA
Plate	S2: 330 V / 3.2 W
Screen	S2: 330 V / 0.55 W
rP	S2: 300,000 Ω
gm	S2: 7.8 mA/V

Sections

2

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

High-perveance diode and sharp-cutoff pentode for television IF amplification, video detection, AGC, and DC-restorer service.

Base

9AK

Socket code

B9A

Electrical Summary

Heater	6.3 V / 450 mA
Plate	S1: 200 V / 2.5 W
Screen	S1: 330 V / 0.5 W
Ik max	S2: 5 mA
Rectifier	S2: 5 A
V Inverse	S2: 330 V
rP	S1: 300,000 Ω
gm	S1: 6.2 mA/V

Sections

2

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

High-perveance diode and sharp-cutoff pentode for television or radio IF, video, AGC, detector, and DC-restorer applications.

Base

B7G

Socket code

B7G

Electrical Summary

Heater	6.3 V / 350 mA
Plate	S1: 250 V / 2.5 W
Screen	S1: 250 V / 0.8 W
Ik max	S1: 18 mA
gm	S1: 4.35 mA/V
μ	S1: 38

Sections

2

7 pins - B7G - Miniature 7-contact

High-frequency pentode with auxiliary diode for controlled amplification, mixing, variable-reactance, modulator, and timing applications at HF through UHF.

Base

9CY

Socket code

B9A

Electrical Summary

Heater	6.3 V / 450 mA
Plate	S2: 330 V / 3.2 W
Screen	S2: 330 V / 0.55 W
rP	S2: 200,000 Ω
gm	S2: 9.3 mA/V

Sections

2

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

Television diode-pentode combining a video-detector diode with a high-transconductance sharp-cutoff pentode for IF amplification, integrating picture-signal detection and wideband IF gain.