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W444

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ID = 13168
       
Country:
Netherlands
Brand: Longlife, the Hague
Tube type:  Diode-Tetrode 
  Ca. 1925 up to 1945 rare.
Identical to W444
Similar Tubes
Normally replaceable-slightly different:
  E444
Production stop Feb.1938

Base Europe 7-Pin C7A (Hx C, C7, C) 1933 (Codex=Le)
Filament Vf 4 Volts / If 1 Ampere / Indirect
Description The "Röhren-codex" lists this tube as a Thermion tube, but the brand is Longlife. 
Information source Taschenbuch zum Röhren-Codex 1948/49   
- - Manufacturers Literature   1934

12_7~~1.png W444: Telefunken Werkstattbuch
Wolfgang Bauer


Just Qvigstad
 

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