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K40B

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ID = 12778
       
Country:
Great Britain (UK)
Brand: Ever Ready Co. (GB) Ltd.; London
Tube type:  Screen-grid Tetrode 
Identical to K40B

Base Europe 4-Pin B4 (Eu A, E, 4A) 1914 (Codex=Er)
Filament Vf 2 Volts / If 0.18 Ampere
Information source Taschenbuch zum Röhren-Codex 1948/49   


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