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DR

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ID = 12678
       
Country:
Netherlands
Brand: Radio-Record - Röhrenmarke; Holland
Developer: Radio-Record - Röhrenmarke; Holland 
Tube type:  Space Charge Tetrode 
  <1925 rare.
Identical to DR
First Source (s)
Sep.1924 : Radio-Expres, Netherlands
Successor Tubes D416B  

Base Europe 4-Pin B4 (Eu A, E, 4A) 1914 (Codex=Eu) Sidecontact
Filament Vf 4 Volts / If 0.5 Ampere / Direct / Battery =
Dimensions (WHD)
incl. pins / tip
50 x 97 x 31 mm / 1.97 x 3.82 x 1.22 inch
Weight 43 g / 1.52 oz
Information source Taschenbuch zum Röhren-Codex 1948/49   
- - Manufacturers Literature   
 
dr.jpg
DR
Peter den Boer

 
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DR
Peter den Boer

 
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DR: own collection
Peter den Boer



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