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P425_B4

Information - Help 
ID = 59019
       
Country:
Austria
Brand: Triotron (tubes) = Brand of Schrack, Austria
Developer: Triotron (tubes) = Brand of Schrack, Austria 
Tube type:  Vacuum Pentode   Power/Output 
  Ca. 1925 up to 1945 rare.
Identical to P425_B4
Similar Tubes
Other base:
  P425_Triotron
Other base and data slightly different:
  M43

Base Europe 4-Pin B4 (Eu A, E, 4A) 1914 Sidecontact.
Was used by Radio/TV-reception etc.
Filament Vf 4 Volts / If 0.25 Ampere / Direct / Battery =
Information source - - Manufacturers Literature   1935
 
triotron_5.png
P425_B4: Triotron Röhrenkatalog von 1942
Wolfgang Bauer

 
triotron_7~~1.png
P425_B4: Triotron Röhrenkatalog von 1942
Wolfgang Bauer

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