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ID = 24888
United States of America (USA)
Brand: Common type USA tube/semicond.
Tube type:  Non-linear components 
Identical to NB-2

Base Octal (Int.Octal, IO) K8A, USA 1935
Description 360mA, 1.8 to 3.2V. Used in 2V filament battery operated sets. 
Information source Ballast Tube Handbook, The   

Just Qvigstad
NB-2: Raytheon Databook 1937
Emilio Ciardiello


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