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D502

Information - Help 
ID = 14051
       
Country:
Netherlands
Brand: Thermion; Netherlands
Tube type:  Triode, vacuum 
  Ca. 1925 up to 1945 rare.
Identical to D502
Similar Tubes
Normally replaceable-slightly different:
  A425
Production stop Feb.1938
Successor Tubes 1-425  

Base Europe 4-Pin B4 (Eu A, E, 4A) 1914 (Codex=Eo)
Filament Vf 4 Volts / If 0.09 Ampere / Direct / Battery =
Information source Taschenbuch zum Röhren-Codex 1948/49   
- - Manufacturers Literature   1931
 
d94d163d502base_2.png
D502
Peter den Boer

 
d502data.png
D502: own collection
Peter den Boer


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