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ID = 28842
United States of America (USA)
Brand: RCA (RCA Victor Co. Inc.); New York (NY)
Developer: General Electric Co. (GE); Bridgeport CT, Syracuse NY 
Tube type:  Transmitting Triode, air cooled   Power/Output 
Identical to UV204A = C304A = 504A = E704A
First year 1926 Saga of the Vacuum Tube, Tyne page 327, 328
First Source (s)
1923 : Saga of the Vacuum Tube, Tyne p.328
Predecessor Tubes UV204_cylindric  

Base Pin-and-blade jumbo
Was used by Transmittertube (Radio)
Filament Vf 11 Volts / If 3.85 Ampere / Direct / Parallel / series AC/DC
Description Work started on development of this tube at the GE laboratories in March 1922 and the type number was assigned to it in the summer of 1923. Also it was announced to the public at this time max anode dissipation 250 Watts; two tubes in class-B audio amplifier wit Ua = 2000 V delivered 600 Watts output! 
UV204A: QST, Ausgabe Oktober 1929, Anzeige
Daniel Consales

UV204A: Fin Stewart
Fin Stewart

UV204A: Banneitz, TB der drahtl. Teleph. 1927
Anonymous 15 Collector

Usage in Models 1= 1923?? ; 1= 1926?

Quantity of Models at with this tube (valve, valves, valvola, valvole, válvula, lampe):2

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