Large audio power output triode, developed by Westinghouse, used as an amplifier and modulator in radiotelephone transmitters. Manufacturer: RCA (USA).
It has an oxide coated filament which took 1.25 A at 7.5 V. At an anode voltage of 450 it could deliver 4.7 watts output.

Physical Description

Conical glass bulb with 4 pin UX base mounted on display block.

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