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Duotron4W

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ID = 52632
       
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 Duotron4W

Base SPECIAL TUBEBASE in general
Filament Vf 3.5 Volts / If 0.125 Ampere / Direct / Battery =
Description This is a gaseous double triode. Both systems for HF amplification or resistor coupling. 
Information source - - Manufacturers Literature   
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duotronsockel_5.png Duotron4W
Peter den Boer

duotron2w4wdata1_1.png
Duotron4W: own collection
Peter den Boer

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