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ID = 27876
Great Britain (UK)
Brand: Standard Telephones and Cables Ltd. (STC); London, Foots Cray
Tube type:  Half-Wave Vacuum Rectifier   Power-supply 
Identical to R12 = CV426

Base Wires only.
Filament Vf 6.3 Volts / If 0.09 Ampere / Half indirect / Specified voltage AC/DC

Wire ended EHT rectifier 17kV 0.5mA peak.

Information source -- Original-techn. papers.   
R12: Frank Cuffe
Frank Cuffe

R12: RTT
Michael Schlör

R12: Brimar Radio Valves and Teletube Manual No.4
Anonymous 1038 Collector

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Usage in Models 1= 1950 ; 5= 1953 ; 8= 1954

Quantity of Models at with this tube (valve, valves, valvola, valvole, válvula, lampe):14

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