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W429_Marathon

Information - Help 
ID = 50812
       
Country:
Netherlands
Brand: Marathon (tubes), Radio-Marathon, N.V. Rave; Amsterdam, Eindhoven
Tube type:  Screen-grid Tetrode 
  Ca. 1925 up to 1945 rare.
Identical to W429_Marathon
Similar Tubes
Normally replaceable-slightly different:
  AS4120 ; E462 ; RENS1264

Base Europe 5-Pin , B5 (Eu O, F, O5A) 1928 Top contact screw type
Filament Vf 4 Volts / If 1 Ampere / Indirect
Dimensions (WHD)
incl. pins / tip
50 x 147 x 34 mm / 1.97 x 5.79 x 1.34 inch
Weight 67 g / 2.36 oz
Information source - - Manufacturers Literature   1935
 
w429.jpg
W429_Marathon
Peter den Boer

 
9_15~~2.png
W429_Marathon: Telefunken Werkstattbuch
Wolfgang Bauer

 
w429data.png
W429_Marathon: own collection
Peter den Boer


from Just Qvigstad


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