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ID = 34931
United States of America (USA)
Brand: Western Electric Company Inc.; New York (NY)
Tube type:  Transmitting Triode, air cooled 
Identical to 331A = 805

Filament Vf 10 Volts / If 3.2 Ampere
Description High-mu transmitting triode, graphite anode. 125W, 30MHz, typical mu=40; also used as class B modulator. 4-pin jumbo base. 
Literature Tube Lore (I)   
331A: ARRL Handbook 1972
Michael Schlör


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