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ID = 28841
United States of America (USA)
Brand: RCA (RCA Victor Co. Inc.); New York (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 Vacuumtube, Tyne page 325-327
Predecessor Tubes UV203  

Filament Vf 10 Volts / If 3.25 Ampere
Description 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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