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ID = 44386
United States of America (USA)
Brand: Cunningham Inc., E.T.; Harrison (NJ)
Developer: General Electric Co. (GE); Bridgeport CT, Syracuse NY 
Tube type:  Transmitting Triode, air cooled   Universal 
Identical to C304A = UV204A = 504A

Base Pin-and-blade jumbo Top contact with a cap
Was used by Transmittertube (Radio)
Filament Vf 11 Volts / If 3.85 Ampere / Direct / Parallel, (AC/DC)
Description In line with the agreement RCA/GE had with E T Cunningham, work started on development of this tube in March 1922 and the type number was assigned to it in the summer of 1923. It was also announced to the public at this time. Max anode dissipation 250 watts; two tubes in class-B audio amplifier with Ua = 2000 vollts delivered 600 watts output ! 
Literature -- Collector info (Sammler)   Banneitz, TB der drahtl. Telephonie u.Telegr. 1927
C304A: Fin Stewart
Fin Stewart

C304A: Banneitz, TB der drahtl. Teleph. 1927
Anonymous 15 Collector

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