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2457

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ID = 7521
       
Country:
Germany
Brand: India (Röhrenmarke); Berlin
Tube type:  High-vacuum Rectifier 
Identical to 2457

Base Europe 4-Pin B4 (Eu A, E, 4A) 1914 (Codex=Eo)
Filament Vf 4 Volts / If 1 Ampere / Direct
Information source Taschenbuch zum Röhren-Codex 1948/49   


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