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W307_Marathon

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ID = 50810
       
Country:
Netherlands
Brand: Marathon (tubes), Radio-Marathon, N.V. Rave; Amsterdam, Eindhoven
Tube type:  Triode, vacuum 
  Ca. 1925 up to 1945 rare.
Identical to W307_Marathon
Similar Tubes
Normally replaceable-slightly different:
  AR4101 ; E438 ; REN1004

Base Europe 5-Pin (O5A, B5)
Filament Vf 4 Volts / If 1 Ampere / Indirect
Description Detectoe and LF amplification, resister coupling. 
Literature - - Manufacturers Literature   1935
 
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W307_Marathon: Telefunken Werkstattbuch
Wolfgang Bauer

 
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W307_Marathon: own collection
Peter den Boer


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