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S408

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ID = 12974
       
Country:
Austria
Brand: Triotron (tubes) = Brand of Schrack, Austria
Tube type:  Screen-grid Tetrode   Audio Frequency 
Identical to S408
Similar Tubes
Normally replaceable-slightly different:
  S4

Base Europe 4-Pin B4 (Eu A, E, 4A) 1914 (Codex=Er) Top contact screw type.
Was used by Radio/TV-reception etc.
Filament Vf 4 Volts / If 0.06 Ampere
Information source Taschenbuch zum Röhren-Codex 1948/49   

b4_tetrode~~14.gif S408: Fin Stewart
Fin Stewart


Just Qvigstad
 

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