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20D2

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ID = 8760
       
Country:
Great Britain (UK)
Brand: Standard Telephones and Cables Ltd. (STC); London, Foots Cray
Tube type:  Triode-Hexode   Controlling (mu) 
Identical to 20D2

Base British-7-Pin, old (M7A) (Codex=Nd) Top contact with a cap.
Filament Vf 13 Volts / If 0.15 Ampere / Indirect
Information source Taschenbuch zum Röhren-Codex 1948/49   

20d2_sock.png 20D2: Tabu Röhren-Codex, 1948
Anonymous 15 Collector

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Just Qvigstad
20d2_doc.png
20D2: Babani Radio Tube Encyclopaedia 1949
Patrice Zeissloff

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Usage in Models 4= 1939 ; 2= 1940

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):6

Collection of

 
6e71c355_b02a_4e97_90f7_b718249e52e3.jpeg

 

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