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WD40

Information - Help 
ID = 10470
       
Country:
Great Britain (UK)
Brand: Marconi-Osram - (Valves/Tubes); GB
Tube type:  Double Diode-Pentode 
Identical to WD40
Similar Tubes
Heater different:
  WD30

Base B9 British 9-Pin (Codex=Yk) Top contact with a cap
Filament Vf 4 Volts / If 1 Ampere / Indirect
Description 4V heater NOT 2V as in the Roehren-Codex 1948/49.

General-purpose for RF IF and AF use. 

Information source Taschenbuch zum Röhren-Codex 1948/49   
- - Manufacturers Literature   Advertisement Nov 1935
 
wd40.jpg
WD40: O.J.
Ottó Jancsek

 
wd40_sock.png
WD40: Tabu Röhren-Codex, 1948
Anonymous 15 Collector

 

from Just Qvigstad


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