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ID = 28947
United States of America (USA)
Brand: Western Electric Company Inc.; New York (NY)
Tube type:  Transmitting Triode, air cooled   Power/Output 
Identical to 202A = K_Western
Successor Tubes E_Western   205A   205B   VT-2   CW-931  

Base SPECIAL TUBEBASE in general
Filament Direct / Battery =
Description 5 Watt at 500 Volt.
Designed for aircraft transmitters, was soon superseded by VT-2. Sibley reports just 76 pieces of 202A delivered to Signal Corps. 
Information source Saga of the Vacuum Tube, Tyne   page 102, 104, 280
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