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ID = 10675
Great Britain (UK)
Brand: Common type Great Britain tube/semicond.
Tube type:  Vacuum Pentode   Power/Output 
Identical to 10E/389 = VT501 = CV1501 = TT11 = E1192 = ZA17430

Base Octal (Int.Octal, IO) K8A, USA 1935 (Codex=Uc)
Filament Vf 6.3 Volts / If 0.8 Ampere / Indirect / Parallel, (AC/DC)
Description 10E/389 is not the name of the tube but a UK Government stores reference number. The Army reference for this tube was ZA17430.
It was later designated VT501 which was assimilated into the CV1501 specification met by the E1192 and TT11. 
Information source Taschenbuch zum Röhren-Codex 1948/49   
10E/389: Private collection
Emilio Ciardiello

10E/389: Manufacturer's Literature
Emilio Ciardiello

10E/389: Manufacturer's Literature
Emilio Ciardiello

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