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W306_Marathon

Information - Help 
ID = 20359
       
Country:
Netherlands
Brand: Marathon (tubes), Radio-Marathon, N.V. Rave; Amsterdam, Eindhoven
Tube type:  Triode, vacuum   Power/Output 
  Ca. 1925 up to 1945 rare.
Identical to W306_Marathon
Similar Tubes
Normally replaceable-slightly different:
  F704 ; T730

Base Europe 4-Pin (A, 4A, B4, since 1914)
Filament Vf 7.5 Volts / If 1.25 Ampere / Direct / Parallel, (AC/DC)
Description There is an error in tha datasheet of this tube where is stated that it has a B5 base. This tube (other brochures) has a B4 base and the tube is heated direct. 
Literature - - Manufacturers Literature   1935
 
w306_marathon_so.png
W306_Marathon: rtt
Michael Schlör

 
w306data.png
W306_Marathon: own collection
Peter den Boer


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