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ID = 20626
United States of America (USA)
Brand: Arcturus Radio Tube Co.; Newark, NJ
Tube type:  Wunderlich Tube   Detector 
Identical to WunderlichA_5pin
Similar Tubes
Other base:
  WunderlichA ; WunderlichA_6pin
Other base and data slightly different:
  29_Wunderlich ; 90_Wunderlich ; KR20

Base UY-Base, 5 Pins (USA, April 1927) Top contact with a cap.
Filament Vf 2.5 Volts / If 1 Ampere / Indirect / Specified voltage AC/DC
Description See Wunderlich and Wunderlich A; Single triode with two intermeshed grids equally spaced from the single cathode and the plate. Used as a full wave detector (AM) with additional LF-amplification. It was made with a 5 pin base and a top cap (= cathode) and also with a 6 pin base with no cap. 
Text in other languages (may differ)
WunderlichA_5pin: scc
Christian Schaufelberger

More ...
WunderlichA_5pin: W.H.
Wolfgang Holtmann


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