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Tube Substitutions for:
3A4
Power Amplifier Pentode
TypeSubstitutesBase Diagram
3A43Q4, 3W4
Web References3A4 (Mazda-Belvu) @ Franks Electron Tubes
3A4 (Tung-Sol) @ Franks Electron Tubes
3A4 @ RadioMuseum.org


Type 3A4
Power Amplifier Pentode



MECHANICAL DATA

Basing7BB


ELECTRICAL DATA


HEATER CHARACTERISTICS
Heater Voltage2.8/1.4Volts
Heater Current0.1/0.2A


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