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ID = 31719
Great Britain (UK)
Brand: Mazda = Valve (Tube) brand GB (see also France)
Tube type:  Photocell Gas filled 
Identical to PE51

Base Octal (Int.Octal, IO) K8A, USA 1935
Was used by Technology / Measurement
Filament No heater

Red/Infra-Red Sensitive.

Dimensions (WHD)
incl. pins / tip
x 78 x 28 mm / x 3.07 x 1.10 inch
Weight 25 g / 0.88 oz
Information source - - Manufacturers Literature   Ediswan and Mazda data sheets dated December 1953.
PE51: Sammlung KHB
Karl - Heinz Bossan

PE51: Ediswan
Dietrich Grötzer

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