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E253B

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ID = 28552
       
Country:
France
Brand: SFR (S.F.R.) - Société Française Radio-Électrique; Paris
Tube type:  UNKNOWN 
Identical to E253B

Base Europe 4-Pin B4 (Eu A, E, 4A) 1914
Was used by Transmittertube (Radio)
Filament
Information source Saga of the Vacuum Tube, Tyne   p.409


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