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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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6939
Power - Pentode (NOT beam)Pentode-RectifierSeries-parallel
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Base
9HL
Socket code
B9A
Electrical Summary
Heater 12.6 V / 300 mA
Plate S1: 300 V / 7 WS2: 300 V / 7 W
Screen S1: 300 V / 1.5 WS2: 300 V / 1.5 W
Ik max S1: 50 mAS2: 50 mA
rP S1: 30,000 ΩS2: 30,000 Ω
gm S1: 7.5 mA/VS2: 7.5 mA/V
μ S1: 31S2: 31
Sections
2
9 pins - B9A - Small-button Noval 9-contact
Variations:QQE025
Industrial twin power pentode for push-pull RF amplification or frequency multiplication at frequencies extending to approximately 500 MHz.
Designed For VHF RF Power Pentode RF Power Tube
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Electrical Summary

General Summary

Power - Pentode (NOT beam)Pentode-RectifierSeries-parallel

Heater	12.6 V / 300 mA
Plate	S1: 300 V / 7 WS2: 300 V / 7 W
Screen	S1: 300 V / 1.5 WS2: 300 V / 1.5 W
Ik max	S1: 50 mAS2: 50 mA
rP	S1: 30,000 ΩS2: 30,000 Ω
gm	S1: 7.5 mA/VS2: 7.5 mA/V
μ	S1: 31S2: 31

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

Variations:QQE025

Industrial twin power pentode for push-pull RF amplification or frequency multiplication at frequencies extending to approximately 500 MHz.

Designed For VHF RF Power Pentode RF Power Tube

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