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202DDT

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ID = 13504
       
Country:
Great Britain (UK)
Brand: Cossor, A.C.; London
Tube type:  Double Diode-Triode   Audio Frequency 
Identical to 202DDT
First Source (s)
1936 : History of the British Radio Valve to 1940 p.179
Base British-7-Pin, old (M7A) (Codex=Nb) Top contact with a cap.
Was used by Radio/TV-reception etc.
Filament Vf 20 Volts / If 0.2 Ampere / Indirect / Specified current AC/DC ~ = (Series working)
Information source Taschenbuch zum Röhren-Codex 1948/49   
Babani, International Radio Tube Encyclopaedia   p. 28 & 29
154_4.png 202DDT: Telefunken Werkstattbuch
Wolfgang Bauer

Just Qvigstad 		202ddt_characteristics.png
202DDT: My schematic collection.
Pier Antonio Aluffi
Usage in Models 1= 1936? ; 4= 1938
Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):5

Collection of

John Koster (NL)
 
202ddt.jpg

 
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