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PenDD4020

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ID = 11486
       
Country:
Great Britain (UK)
Brand: Mazda = Valve (Tube) brand GB (see also France)
Developer: Mazda = Valve (Tube) brand GB (see also France) 
Tube type:  Double Diode-Pentode   beam power   Power/Output 
Identical to PenDD4020

Base British-7-Pin, old (M7A) (Codex=Nh)
Was used by Radio/TV-reception etc.
Filament Vf 40 Volts / If 0.2 Ampere / Indirect / Specified current AC/DC ~ = (Series working)
Information source History of the British Radio Valve to 1940   p. 148 & 190
Babani, International Radio Tube Encyclopaedia   p. 128 & 129
Universal Vade-Mecum, Electron Valves and Semiconductor Devices
Taschenbuch zum Röhren-Codex 1948/49

163_5.png PenDD4020: Telefunken Werkstattbuch
Wolfgang Bauer


Just Qvigstad
pendd4020_daten.png
PenDD4020: Ediswan Radio 1.3.1939 Sheet 26/5
Manfred Kröll † 2.9.2013

More ...
Usage in Models 1= 1934?? ; 5= 1934 ; 3= 1935 ; 9= 1936 ; 1= 1937 ; 1= 1938?? ; 1= 1938?

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):21

Collection of

 
mazda_pendd4020_bild1.jpg

PenDD4020
 

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