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ID = 46103
Great Britain (UK)
Brand: Common type Great Britain tube/semicond.
Developer: Marconi-Osram - (Valves/Tubes); GB 
Tube type:  Transmitting Tetrode, air cooled   Text 
Identical to CV44
Similar Tubes
Other class quality (otherwise equal):

Base Jumbo 4-pin bayonet (1918) Top contact with a cap.
Was used by Radar
Filament Vf 8 Volts / If 6 Ampere / Indirect

Metal-glass power tetrode, integral copper radiator. 60W anode dissipation, 12KV max voltage.
4-pin jumbo base.

Information source -- Original-techn. papers.   
Babani, International Radio Tube Encyclopaedia   p. 234
Universal Vade-Mecum, Electron Valves and Semiconductor Devices

Just Qvigstad
CV44: Manufacturer's Literature
Emilio Ciardiello

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