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ID = 28839
United States of America (USA)
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 = 402 = 5watt = 202
Similar Tubes
Normally replaceable-slightly different:
First year Jul.1921 Saga of the Vacuum Tube, 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 =

Work started on development of this tube at the G E Laboratories in the Spring of 1920. and the type number was assigned to it in November 1920. It was announced in March 1921 and the type number UV202 was registered by RCA as a radio trade markwith the US Government on 6th June 1922, being allocated no 155804. The tube was also branded Cunningham C302 and it was also made by a very few other tube manufacturers.

Output 5 Watts.

Text in other languages (may differ)
Dimensions (WHD)
incl. pins / tip
x 132 x 54 mm / x 5.20 x 2.13 inch
Weight 70 g / 2.47 oz
Tube prices 12 Tube prices (visible for members only)
Information source Saga of the Vacuum Tube, Tyne   Pages 323, 325-326
- - Manufacturers Literature   Development of Radiotron transmiting tubes to 1930
Tube Lore (II)

UV202: "The Radio Industry. The Story of Its Development", Chicago & New York, 1928; p. 260.
Karl Dilcher

2a_uv4~~28.png UV202: own collection
Peter den Boer

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

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Usage in Models 6= 1921 ; 1= 1922? ; 1= 1922 ; 1= 1925

Quantity of Models at with this tube (valve, valves, valvola, valvole, válvula, lampe):9

Collection of




And no tip.

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