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ID = 13954
Great Britain (UK)
Brand: Common type Great Britain tube/semicond.
Tube type:  Triode, vacuum   Universal 
Identical to CV1109 = 4D1_Brimar = 10E/11098 = VR109 = NR55 = AR7
Similar Tubes
Heater different:
  CV1000 ; VR109A

Base British-7-Pin, old (M7A) (Codex=Na) Top contact with a cap.
Filament Vf 13 Volts / If 0.2 Ampere / Indirect
Description This spec covers both variants of AR7 and NR55, with 200 and 150mA heater current drain. It also refers to the early version of VR109, draining 200mA. 
Information source Taschenbuch zum Röhren-Codex 1948/49   

4d1_stand.png CV1109: Manufacturer's Literature
Emilio Ciardiello

Just Qvigstad
CV1109: Manufacturer's Literature
Emilio Ciardiello

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