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ID = 20046
Great Britain (UK)
Brand: Mazda = Valve (Tube) brand GB (see also France)
Tube type:  Double Triode   Power/Output 
Identical to PD220_Mazda
First Source (s)
22.Nov.1935 : Wireless World (The), London (WW, 79)

Base British-7-Pin, old (M7A)
Was used by Radio/TV-reception etc.
Filament Vf 2 Volts / If 0.2 Ampere / Direct / Battery =

Designed for class B operation. With Va=100 and -Vg=0, Ia=1mA and Gm=0.9mA/V.

Dimensions (WHD)
incl. pins / tip
45 x 110 x mm / 1.77 x 4.33 x inch
Information source - - Manufacturers Literature   1938 data sheet.
History of the British Radio Valve to 1940   p. 149 & 167
Babani, International Radio Tube Encyclopaedia
Universal Vade-Mecum, Electron Valves and Semiconductor Devices

base_pd220.png PD220_Mazda: own collection
Peter den Boer

Just Qvigstad
PD220_Mazda: own collection
Peter den Boer

More ...
Usage in Models 3= 1933

Quantity of Models at with this tube (valve, valves, valvola, valvole, válvula, lampe):3

Collection of



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