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7D7_GB

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ID = 20392
       
Country:
Great Britain (UK)
Brand: Standard Telephones and Cables Ltd. (STC); London, Foots Cray
Tube type:  Vacuum Pentode   Power/Output 
Identical to 7D7_GB

Base British-7-Pin, old (M7A)
Filament Vf 24 Volts / If 0.2 Ampere / Indirect
Information source Taschenbuch zum Röhren-Codex 1948/49   and 1951

7d7_sock.png 7D7_GB: Tabu Röhren-Codex, 1948
Anonymous 15 Collector


Just Qvigstad
Usage in Models 1= 1935??

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):1
 

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