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20A1

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ID = 8595
       
Country:
Great Britain (UK)
Brand: Standard Telephones and Cables Ltd. (STC); London, Foots Cray
Tube type:  Triode-Heptode   Frequency converter   Controlling (mu) 
Identical to 20A1 = CV1424 = CV1697 = NR84 = VT147_GPO
Similar Tubes
Normally replaceable-slightly different:
  CV1194 ; CV1460 ; X41

Base British-7-Pin, old (M7A) (Codex=Nao)
Was used by Radio/TV-reception etc.
Filament Vf 4 Volts / If 1.2 Ampere / Indirect / Specified voltage AC/DC
Information source Taschenbuch zum Röhren-Codex 1948/49   

560.png 20A1: Telefunken Werkstattbuch
Wolfgang Bauer


Just Qvigstad
Usage in Models 5= 1938 ; 1= 1939?

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

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