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ID = 28839
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 
  <1925 very rare. ***
Identical to UV202 = C302 = D402_deForest = 202_Sonatron = 402 = 5watt = 202_UV
First year Jul.1921 Saga of the Vacuumtube, Tyne page 323ff

Base UV-Base (4 Pins+Bayonet, USA 1914 WE)
Was used by Transmittertube (Radio)
Filament Vf 7.5 Volts / If 2.35 Ampere / Direct / Battery =

The type number UV202 was registered by RCA as a radio trade markwith the US Government on 6th June 1922, being allocated no 155804.

Output 5 Watts.

Text in other languages (may differ)
Tube prices 9 Tube prices (visible for members only)
Literature Saga of the Vacuumtube, Tyne   Pages 323, 325-326
  UV202: "The Radio Industry. The Story of Its Development", Chicago & New York, 1928; p. 260.
Karl Dilcher
UV202: My Collection
Bruce Morgenstern

UV202: own collection
Peter den Boer

UV202: Banneitz, TB der drahtl. Teleph. 1927
Anonymous 15 Collector

Usage in Models 6= 1921 ; 1= 1922? ; 1= 1922

Quantity of Models at with this tube (valve, valves, valvola, valvole, válvula, lampe):8

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