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ID = 16240
Brand: Loewe-(Opta); Deutschland
Developer: Loewe-(Opta); Deutschland 
Tube type:  LOCKED OFF TUBE (CODE 9) - see in Notes 
Identical to 3NFBatt = 3NFB = 3NFBAT

Base SPECIAL TUBEBASE in general (Codex=Sp 91)
Filament Vf 4 Volts / If 0.12 Ampere / Direct / Battery =
Description Der Röhren-Codex 1948 führt diese Röhre fälschlicherweise als 3NF Batt, doch die Röhren sind mit 3NFB oder 3NF.BAT. versehen! 
Information source Taschenbuch zum Röhren-Codex 1948/49   

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