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20D4

Information - Help 
ID = 25756
       
Country:
Great Britain (UK)
Brand: Brimar (STC); Foots Cray
Tube type:  Triode-Heptode   Frequency converter 
Identical to 20D4

Base Noval, 9 pin miniature (USA pico-9) B9A
Was used by Radio/TV-reception etc.
Filament Vf 6.3 Volts / If 0.3 Ampere / Indirect / Parallel / series AC/DC
Information source Babani, International Radio Tube Encyclopaedia   
  valvula20d4.png
  20D4: Internet
Miguel Angel Trujillo-Rodriguez
 
20d4_a_schufi.jpg
20D4: scc
Christian Schaufelberger

 

from Just Qvigstad

Usage in Models 4= 1957 ; 4= 1959? ; 4= 1959

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):12


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