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WD30

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ID = 10469
       
Country:
Great Britain (UK)
Brand: Marconi-Osram - (Valves/Tubes); GB
Tube type:  Double Diode-Pentode 
Identical to WD30
Similar Tubes
Heater different:
  WD40

Base B9 British 9-Pin (Codex=Yk) Top contact with a cap.
Filament Vf 13 Volts / If 0.3 Ampere / Indirect
Description General-purpose for RF IF and AF use. 
Information source Taschenbuch zum Röhren-Codex 1948/49   
- - Manufacturers Literature   Advertisement Nov 1935
 
4f9e8f03_6d6f_4a97_bdee_1e18bccba221.jpeg
WD30: Own photo
Roddie Rankin

 
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WD30: W.Sprick: Austausch-Röhren-Lexikon 1947
Günther Stabe † 19.8.20

 

from Just Qvigstad

Usage in Models 3= 1935 ; 2= 1936

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):5


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