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ID = 72306
Great Britain (UK)
Brand: Standard Telephones and Cables Ltd. (STC); London, Foots Cray
Tube type:  Half-Wave Vacuum Rectifier   Power-supply 
Identical to 2T/450E = 705A = CV3587

Base Medium 4-pin, ceramic disc Top contact with a cap.
Was used by Industrial
Filament Vf 5 Volts / If 5 Ampere / Direct

<30kV piv; Pa <60W

Ia <0.15A average, 0.6A at 15kV piv

Centre-tapped heater permits operation at 2.5V 10A.



Dimensions (WHD)
incl. pins / tip
65 x 129 x mm / 2.56 x 5.08 x inch
Weight 90 g / 3.17 oz
Information source - - Manufacturers Literature   STC June 1961

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