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BR

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ID = 6957
       
Country:
France
Brand: Grammont (Radiofotos, Fotos); Paris, Malakoff
Tube type:  Space Charge Tetrode 
Identical to BR = A441

Base Europe 4-Pin B4 (Eu A, E, 4A) 1914 Sidecontact.
Filament Vf 4 Volts / If 0.06 Ampere / Direct / Battery =
Information source Taschenbuch zum Röhren-Codex 1948/49   
- - Manufacturers Literature   2-9-1933
 
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BR: own collection
Peter den Boer


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