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ID = 11916
Great Britain (UK)
Brand: Common type Great Britain tube/semicond.
Tube type:  Transmitting Tube, Pentode, air cooled 
  Ca. 1925 up to 1945 very rare. ***
Identical to NT63A = CV1239

Base Wires
Was used by Transmittertube (Radio)
Filament Vf 13 Volts / If 40.8 Ampere / Direct

Silica transmitting pentode. Basket-like anode, made of double woven molybdenum ribbon. Internal silica frame supporting electrodes.

  • 10 kV max, 6 kV typical anode voltage
  • 60 mA typical. 2 A max emission
  • 2.5 kW max plate dissipation

Also referred to as Admiralty Pattern AP 798A or 10E/442.

Dimensions (WHD)
incl. pins / tip
100 x 360 x mm / 3.94 x 14.17 x inch
Information source Taschenbuch zum Röhren-Codex 1948/49   
-- Original-techn. papers.   
NT63A: Private collection
Emilio Ciardiello

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