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ID = 8279
Great Britain (UK)
Brand: Mazda = Valve (Tube) brand GB (see also France)
Tube type:  Half-Wave Vacuum Rectifier   Power-supply 
Identical to U4020 = CV1267

Base Europe 5-Pin , B5 (Eu O, F, O5A) 1928 (Codex=F)
Was used by Radio/TV-reception etc.
Filament Vf 40 Volts / If 0.2 Ampere / Indirect / Series, AC/DC

Input 250V rms; output 120mA average. (The earlier 1938 Mazda data gives a maximum current rating of 75mA.)

Information source Taschenbuch zum Röhren-Codex 1948/49   
- - Manufacturers Literature   1937 data sheet.
U4020: Sammlung GJ
Anonymous 544 Collector

U4020: Tabu Röhren-Codex, 1948
Anonymous 15 Collector

U4020: own collection
Peter den Boer

from Just Qvigstad

Usage in Models 1= 1935? ; 5= 1935 ; 7= 1936 ; 7= 1937 ; 1= 1938?? ; 1= 1938? ; 4= 1938

Quantity of Models at with this tube (valve, valves, valvola, valvole, válvula, lampe):26

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