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70

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ID = 18003
       
Country:
United States of America (USA)
Brand: Common type USA tube/semicond.
Tube type:  Current Regulator, Urdox with FeH 
Identical to 70

Base Edison small E10 = 10 mm (Codex=Edison 10 mm)
Filament No heater
Literature Taschenbuch zum Röhren-Codex 1948/49   
 

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