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ID = 12846
Great Britain (UK)
Brand: Common type Great Britain tube/semicond.
Tube type:  Screen-grid Tetrode 
Identical to NR37 = CV1164

Base Europe 4-Pin (A, 4A, B4, since 1914) (Codex=Er)
Filament Vf 4 Volts / If 1 Ampere /
Literature Taschenbuch zum Röhren-Codex 1948/49   

NR37: Manufacturer's Literature
Emilio Ciardiello

NR37: Manufacturer's Literature
Emilio Ciardiello

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