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ID = 25473
United States of America (USA)
Brand: RCA (RCA Victor Co. Inc.); New York (NY)
Developer: Philips; Eindhoven (tubes international!); Miniwatt 
Tube type:  Double Diode-Triode   Audio Frequency 
  Late but very rare. ***
Identical to 1639 = 10E/11401 = 850_GB = ZA3497 = CV352 = EBC33 = VR55 = CV1055
First Source (s)
1941 : Tube Lore (I)
Production stop 1945

Base Octal (Int.Octal, IO) K8A, USA 1935 Top contact with a cap.
Filament Vf 6.3 Volts / If 0.2 Ampere / Indirect / Specified voltage AND current AC/DC
Description RCA production of British types, furnished to British government via U.S. Signal Corps 

ebc33.png 1639: Manufacturer's Literature
Emilio Ciardiello

Just Qvigstad
1639: Babani 1951-1954
Patrice Zeissloff

Collection of



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