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ID = 77918
Great Britain (UK)
Brand: Standard Telephones and Cables Ltd. (STC); London, Foots Cray
Tube type:  Half-Wave Vacuum Rectifier 
Identical to CV8265 = ESU112

Base Jumbo 4-pin bayonet Top contact with a cap.
Was used by Radar
Filament Direct

No data found on this HV rectifier. Likely a variant of the 8020 industry standard.

Information source -- Collector info (Sammler)   
CV8265: Private collection
Emilio Ciardiello


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