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D28

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ID = 7704
       
Country:
Netherlands
Brand: Thermion; Lent (Nijmegen)
Tube type:  Half-Wave Vacuum Rectifier   Power-supply 
  Ca. 1925 up to 1945 rare.
Identical to D28
Similar Tubes
Normally replaceable-slightly different:
  1802
Production stop Feb.1938

Base Europe 3-Pin B3 (Eu H) (Codex=Eo)
Filament Vf 4 Volts / If 0.6 Ampere / Direct
Information source Taschenbuch zum Röhren-Codex 1948/49   
- - Manufacturers Literature   1933


Just Qvigstad
d28data.png
D28: own collection
Peter den Boer

 

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