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ID = 28841
United States of America (USA)
Brand: General Electric for Brand RCA-Radiotron; Bridgeport CT, Syracuse NY
Developer: General Electric Co. (GE); Bridgeport CT, Syracuse NY 
Tube type:  Transmitting Triode, air cooled   Power/Output 
Identical to UV203A = 303A = 503A = PR3b = C303A = E703A
Similar Tubes
Different maximum ratings:
First year 1923 Saga of the Vacuum Tube, Tyne page 325-327
Predecessor Tubes UV203  

Base Jumbo 4-pin bayonet
Was used by Transmittertube (Radio)
Filament Vf 10 Volts / If 3.25 Ampere / Direct
Description This tube was developed at the G E laboratories in October 1920 and the type number was assigned to it in the summer of 1923. It was also announced to the public at the same time. 50 Watt output. Thoriated tungsten filament. Mu 25, 15MHz. 
Tube prices 3 Tube prices (visible for members only)
UV203A: R.O.
Rudolf Osterkamp

UV203A: ARRL Handbook 1972
Michael Schlör

UV203A: Banneitz, TB der drahtl. Teleph. 1927
Anonymous 15 Collector

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