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U4F

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ID = 16497
       
Country:
Denmark
Brand: M.P. Denmark
Tube type:  Triode, vacuum   Power/Output 
Identical to U4F
Similar Tubes
Normally replaceable-slightly different:
  M7

Base Europe 4-Pin B4 (Eu A, E, 4A) 1914 (Codex=Eo)
Filament Vf 4 Volts / If 1 Ampere / Direct
Information source Taschenbuch zum Röhren-Codex 1948/49   
- - Manufacturers Literature   

1base~~1.png U4F: own collection
Peter den Boer


Just Qvigstad
direct_heated~~3.png
U4F: own collection
Peter den Boer

 

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