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DS1_Thermion

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ID = 20701
       
Country:
Netherlands
Brand: Thermion; Lent (Nijmegen)
Tube type:  Screen-grid Tetrode 
  Ca. 1925 up to 1945 rare.
Identical to DS1_Thermion
Similar Tubes
Normally replaceable-slightly different:
  B442
Production stop Feb.1938
Successor Tubes 2-442  

Base Europe 4-Pin B4 (Eu A, E, 4A) 1914 Top contact screw type.
Filament Vf 4 Volts / If 0.085 Ampere / Direct / Battery =
Information source - - Manufacturers Literature   1931

ds1thermion_so.png DS1_Thermion: rtt
Anonymous 10 Collector


Just Qvigstad
ds1.png
DS1_Thermion: own collection
Peter den Boer

 

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