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S409

Information - Help 
ID = 12976
       
Country:
Austria
Brand: Triotron (tubes) = Brand of Schrack, Austria
Tube type:  Screen-grid Tetrode   RF/IF-Stage 
Identical to S409
Similar Tubes
Normally replaceable-slightly different:
  B442 ; H406D ; H410D ; RES094 ; S406 ; S410

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 0.1 Ampere / Direct / Battery =
Information source Taschenbuch zum Röhren-Codex 1948/49   
 
s409.jpg
S409: K.K.
Anonymous 719 Collector

 
3_48.png
S409: Triotron Röhrenkatalog von 1942
Wolfgang Bauer

 
triotron_1_4.png
S409: Triotron Röhrenkatalog von 1942
Wolfgang Bauer


from Just Qvigstad

Collection of a member from D

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