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ID = 71681
United States of America (USA)
Brand: DeForest-Tubes
Developer: General Electric Co. (GE); Bridgeport CT, Syracuse NY 
Tube type:  Transmitting Triode, air cooled   Power/Output 
Identical to 504A = UV204A = C304A = E704A

Base Pin-and-blade jumbo Top contact with a cap
Was used by Transmittertube (Radio)
Filament Vf 11 Volts / If 3.75 Ampere / Direct / Parallel, (AC/DC)

250 watt RF oscillator and amplifier. Negative grid bias Class "B" 100 volts; Class C 175 volts..

Dimensions (WHD)
incl. pins / tip
x 337 x 110 mm / x 13.27 x 4.33 inch
Literature - - Manufacturers Literature   1933 Lafayette radio catalog page 37
504A: R.O.
Rudolf Osterkamp

504A: Fin Stewart
Fin Stewart


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