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DD/Pen

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ID = 10000
       
Country:
Great Britain (UK)
Brand: Cossor, A.C.; London
Tube type:  Double Diode-Pentode   RF/IF-Stage   Controlling (mu) 
Identical to DD/Pen
First Source (s)
1934 : History of the British Radio Valve to 1940 p. 195
Base British-7-Pin, old (M7A) (Codex=Nh) Top contact with a cap.
Was used by Radio/TV-reception etc.
Filament Vf 4 Volts / If 1 Ampere / Indirect / Specified voltage AC/DC
Information source Taschenbuch zum Röhren-Codex 1948/49   
Babani, International Radio Tube Encyclopaedia   p. 94 & 95
doc_dd_pen_copie.png
DD/Pen: collection personnelle
Marc Couque
630.png DD/Pen: Telefunken Werkstattbuch
Wolfgang Bauer

Just Qvigstad 		ddpen_data.png
DD/Pen: COSSOR VALVE MANUAL 1935-6
Jose Casas-Avalos
Usage in Models 1= 1933? ; 1= 1934?
Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):2
 
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