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C4B

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ID = 24080
       
Country:
United States of America (USA)
Brand: Common type USA tube/semicond.
Tube type:  Non-linear components 
Identical to C4B

Base Octal (Int.Octal, IO) K8A, USA 1935
Filament
Description for 120V use term. 4&7 strapped togehter. For 240V term. open. 
Information source Ballast Tube Handbook, The   
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