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RCA231

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ID = 28738
       
Country:
United States of America (USA)
Brand: RCA (RCA Victor Co. Inc.); New York (NY)
Tube type:  LOCKED OFF TUBE (CODE 9) - see in Notes   Power/Output 
Identical to RCA231 = 31
First year Jun.1930 Saga of the Vacuumtube, Tyne page 330

Filament Vf 2 Volts / If 0.13 Ampere
Description see 31 
 

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