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YD2

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ID = 16623
       
Country:
Austria
Brand: Triotron (tubes) = Brand of Schrack, Austria
Developer: Triotron (tubes) = Brand of Schrack, Austria 
Tube type:  Triode, vacuum   Power/Output 
  Ca. 1925 up to 1945 rare.
Identical to YD2
Similar Tubes
Normally replaceable-slightly different:
  PM2A

Base Europe 4-Pin B4 (Eu A, E, 4A) 1914 (Codex=Eo)
Was used by Radio/TV-reception etc.
Filament Vf 2 Volts / If 0.22 Ampere / Direct / Battery =
Information source - - Manufacturers Literature   1935 & 1931 tube data booklet
Babani, International Radio Tube Encyclopaedia   

yd2_sock.png YD2: Tabu Röhren-Codex, 1948
Anonymous 15 Collector

More ...

Just Qvigstad
yd2data.png
YD2: own collection
Peter den Boer

 

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