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ID = 11072
Great Britain (UK)
Brand: Mazda = Valve (Tube) brand GB (see also France)
Developer: Mazda = Valve (Tube) brand GB (see also France) 
Tube type:  Beam Power Tube   beam power   Power/Output 
  Ca. 1925 up to 1945 rare.
Identical to CV1189 = NR74 = W1301
Similar Tubes
Different connections:
Predecessor Tubes AC6/Pen  

Base British-7-Pin, old (M7A) (Codex=Ncp) Top contact with a cap.
Was used by Radio/TV-reception etc.
Filament Vf 4 Volts / If 1.75 Ampere / Indirect / Specified voltage AND current AC/DC

Television beam power amplifier, with the commercial type number AC6/PEN. 3KV peak anode voltage, 20W plate power dissipation. Plate is connected to the top cap. Tube designed for use in the output stage of a time base for magnetic scanning. The tube has been designed to stand the high peak anode voltages required by this class of service.

Dimensions (WHD)
incl. pins / tip
50 x 135 x mm / 1.97 x 5.31 x inch
Weight 61 g / 2.15 oz
Information source Taschenbuch zum Röhren-Codex 1948/49   
-- Original-techn. papers.   
- - Manufacturers Literature

br739mod.png CV1189: Manufacturer's Literature
Emilio Ciardiello

Just Qvigstad
CV1189: Manufacturer's Literature
Emilio Ciardiello

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