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Plate Resistance: rp

Transconductance: gm (mA/V)

Amplification Factor: μ

Maximum Plate Voltage: Va(max)

Maximum Plate Dissipation: Pa(max)

Maximum Screen Voltage: Vs(max)

Rectifier Nominal Output Current: I(DC)

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8GJ7
Specialized - Ignitron Pentode-TriodeDissimilar
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Base
9QA
Socket code
B9A
Electrical Summary
Heater 8.6 V / 300 mA
Plate S1: 140 V / 1.8 WS2: 275 V / 2.4 W
Screen S2: 275 V / 0.55 W
Ik max S1: 22 mAS2: 20 mA
rP S2: 350,000 Ω
gm S1: 9 mA/VS2: 11 mA/V
μ S1: 20
Sections
2
9 pins - B9A - Small-button Noval 9-contact
Variations:PCF801
Medium-mu triode plus sharp-cutoff pentode used as a combined oscillator and mixer in television receivers.
Frequency Converter Tube Oscillator Tube Pentode Sharp Cutoff Radio Detector Converter Radio Detector Converter Tube TV Receiver Tube
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Electrical Summary

General Summary

Specialized - Ignitron Pentode-TriodeDissimilar

Heater	8.6 V / 300 mA
Plate	S1: 140 V / 1.8 WS2: 275 V / 2.4 W
Screen	S2: 275 V / 0.55 W
Ik max	S1: 22 mAS2: 20 mA
rP	S2: 350,000 Ω
gm	S1: 9 mA/VS2: 11 mA/V
μ	S1: 20

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

Variations:PCF801

Medium-mu triode plus sharp-cutoff pentode used as a combined oscillator and mixer in television receivers.

Frequency Converter Tube Oscillator Tube Pentode Sharp Cutoff Radio Detector Converter Radio Detector Converter Tube TV Receiver Tube

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