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W438

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ID = 15051
       
Country:
Netherlands
Brand: Longlife, the Hague
Tube type:  Triode, vacuum 
  Ca. 1925 up to 1945 rare.
Identical to W438
Similar Tubes
Normally replaceable-slightly different:
  E438
Production stop Feb.1938

Base Europe 5-Pin , B5 (Eu O, F, O5A) 1928 (Codex=F)
Filament Vf 4 Volts / If 1 Ampere / Indirect
Description The "Röhren-codex" lists this tube as a Thermion tube, but the brand is Longlife. LF amplification, resister coupling. 
Information source Taschenbuch zum Röhren-Codex 1948/49   
- - Manufacturers Literature   1-2-1935

e415ws1507ws3030pin5_2.png W438
Peter den Boer


Just Qvigstad
 

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