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Duotron2A

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ID = 52625
       
Country:
Germany
Brand: Radioröhren-Laboratorium-GmbH, Gerd Nickel, (Ultra); Berlin
Developer: Radioröhren-Laboratorium-GmbH, Gerd Nickel, (Ultra); Berlin 
Tube type:  Double Triode 
  Ca. 1925 up to 1945 rare.
Identical to Duotron2A

Base SPECIAL TUBEBASE in general
Filament Vf 1.7 Volts / If 0.28 Ampere / Direct / Battery =
Description Gaseous double triode. First triode is a HF triode, the second triode is a detector. 
Information source - - Manufacturers Literature   

duotronsockel.png Duotron2A
Peter den Boer

duotron2a4adata1.png
Duotron2A: own collection
Peter den Boer

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