Electronic tube and vacuum tube catalog

Base

9GE

Socket code

B9A

Electrical Summary

Heater	4.7 V / 600 mA
Plate	S1: 300 V / 3 WS2: 300 V / 3.2 W
Screen	S2: 300 V / 0.7 W
rP	S1: 5,000 ΩS2: 140,000 Ω
gm	S1: 8 mA/VS2: 5.8 mA/V
μ	S1: 40

Sections

2

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

Medium-mu triode and sharp-cutoff tetrode for television mixer, IF-amplifier, and related signal service.

Base

9KP

Socket code

B9A

Electrical Summary

Heater	6.3 V / 450 mA
Plate	S1: 250 V / 2.5 WS2: 250 V / 2.5 W
Screen	S2: 150 V / 0.5 W
rP	S1: 7,400 ΩS2: 750,000 Ω
gm	S1: 5.4 mA/VS2: 4.4 mA/V
μ	S1: 40

Sections

2

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

Medium-mu triode plus sharp-cutoff tetrode with auxiliary plates for complex-wave-generator and television-receiver applications.

Base

9DX

Socket code

B9A

Electrical Summary

Heater	6.3 V / 750 mA
Plate	S1: 300 V / 1 WS2: 300 V / 5 W
Screen	S2: 330 V / 1.5 W
rP	S1: 17,000 ΩS2: 70,000 Ω
gm	S1: 4 mA/VS2: 14 mA/V
μ	S1: 70

Sections

2

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

High-mu triode and multi-grid section for television synchronization functions and video amplification.

Base

—

Socket code

—

Electrical Summary

Heater	90 V / 50 mA
Plate	S1: 250 V / 0.8 WS2: 250 V / 4 W
Screen	S2: 250 V / 0.5 W
Ik max	S2: 25 mA
rP	S2: 70,000 Ω
gm	S1: 2.4 mA/VS2: 5 mA/V

Sections

2

Economy-receiver triode plus power-output tetrode developed for the DKE; the tetrode provides about 1.2 watts output with 4-watt plate dissipation.