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S4150D

Information - Help 
ID = 12992
       
Country:
France
Brand: Grammont (Radiofotos, Fotos); Paris, Malakoff
Tube type:  Screen-grid Tetrode   Controlling (mu) 
  Ca. 1925 up to 1945 rare.
Identical to S4150D
Similar Tubes
Normally replaceable-slightly different:
  RENS1214

Base Europe 5-Pin , B5 (Eu O, F, O5A) 1928 (Codex=Fc)
Filament Vf 4 Volts / If 1 Ampere / Indirect / Parallel, (AC/DC)
Literature Taschenbuch zum Röhren-Codex 1948/49   
- - Manufacturers Literature   2-9-1933
 
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S4150D: own collection
Peter den Boer


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