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ID = 22828
Great Britain (UK)
Brand: Mazda = Valve (Tube) brand GB (see also France)
Developer: Mazda = Valve (Tube) brand GB (see also France) 
Tube type:  Triode-Pentode   Frequency converter 
  Ca. 1925 up to 1945 very rare. ***
Identical to AC/TP = VT170_GPO = CV1718
First year 23.Mar.1934 Wireless World (The), London (WW, 79)
First Source (s)
22.Nov.1935 : Wireless World (The), London (WW, 79)

Base B9 British 9-Pin Top contact with a cap.
Was used by Radio/TV-reception etc.
Filament Vf 4 Volts / If 1.25 Ampere / Indirect / Specified voltage AC/DC

Anode; 250V und 6,5mA; 200V und 2,5mA; Steuergitter: - 5V; Steilheit: 0,7mA/V

Dimensions (WHD)
incl. pins / tip
x 142 x 45 mm / x 5.59 x 1.77 inch
Information source Babani, International Radio Tube Encyclopaedia   Pages 48-49
Universal Vade-Mecum, Electron Valves and Semiconductor Devices   Pages 702-703
History of the British Radio Valve to 1940

611.png AC/TP: Telefunken Werkstattbuch
Wolfgang Bauer

More ...

Just Qvigstad
AC/TP: data-sheet
Anonymous 15 Collector

More ...
Usage in Models 1= 1934?? ; 3= 1934? ; 19= 1934 ; 1= 1935?? ; 16= 1935 ; 12= 1936 ; 6= 1937

Quantity of Models at with this tube (valve, valves, valvola, valvole, válvula, lampe):58

Collection of



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