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ID = 47432
Great Britain (UK)
Brand: Common type Great Britain tube/semicond.
Tube type:  Transmitting Triode, air cooled 
Identical to CV1249 = NT86 = W1241

Base Wires
Was used by Radar
Filament Vf 10.5 Volts / If 100 Ampere / Direct

Radar transmitting triode with silica envelope. Designed by F.M.Fooley of Signal School in 1939 on the experience of NT57, NT86 was a powerful radar triode: two tubes in push-pull generated 1MW peak power in the Type 281 early warning radar; 90MHz operating frequency, 2 to 3 microseconds pulse width, 50 pps; 60A at 28KV.

Information source -- Original-techn. papers.   
-- Original prospect or advert   Callick, Metres to Microwaves
CV1249: Private collection
Robert Gillespie


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