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ID = 31688
Great Britain (UK)
Brand: Mazda = Valve (Tube) brand GB (see also France)
Tube type:  Thyratron   Power-supply 
Identical to 20A2

Base Octal (Int.Octal, IO) K8A, USA 1935
Filament Vf 6.3 Volts / If 1 Ampere / Indirect / Specified voltage AC/DC

For Use as a Grid Controlled Rectifier

Va <1200 PIV; Ik <250ma mean. Vg1, Vg2 <-100V.

Dimensions (WHD)
incl. pins / tip
x 110 x 40 mm / x 4.33 x 1.57 inch
Information source - - Manufacturers Literature   Ediswan and Mazda data sheets dated June 1949
20A2: own collection
John Koster

20A2: Mullard - original papers
Detlef Narten

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