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ID = 10174
Great Britain (UK)
Brand: Common type Great Britain tube/semicond.
Developer: Mullard Radio Valve Co. Ltd.;  
Tube type:  Vacuum Pentode   RF/IF-Stage   Controlling (mu) 
Identical to NR51 = CV1172

Base British-7-Pin, old (M7A) (Codex=Nc) Top contact with a cap.
Was used by Military and/or Government
Filament Vf 4 Volts / If 1.2 Ampere
Information source Babani, International Radio Tube Encyclopaedia   p. 122 & 123
Taschenbuch zum Röhren-Codex 1948/49   

9a1_1.png NR51: Manufacturer's Literature
Emilio Ciardiello

Just Qvigstad
NR51: Manufacturer's Literature
Emilio Ciardiello

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Usage in Models 1= 1935? ; 2= 1938

Quantity of Models at with this tube (valve, valves, valvola, valvole, válvula, lampe):3

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