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ID = 27621
Great Britain (UK)
Brand: GEC, General Electric Co Ltd., GENALEX; London
Tube type:  Transmitting Triode, air cooled   VHF 
Identical to E1046 = VT90 = CV1090
Similar Tubes
Normally replaceable-slightly different:
Predecessor Tubes E1011  

Base Wires Sidecontact and top contact.
Was used by Radar
Filament Vf 8.2 Volts / If 7 Ampere / Direct

Developed in 1939 by W.H. Aldous and J. Bell of GEC, this was the prototype of a wide family of 'micropup' power triodes capable of operation roughly from 200 to 300MHz.

E1046 is the GEC experimental code approved as VT90. According to Clifford Paterson early productions was planned by R. le Rossignol at GEC from September 1938. Production of 100 units per week was planned, starting from October 1946. Actually volume production was slightly delayed due to insulation issues at high altitude which were readily fixed.

The tube had been designed for the transmitter section of AI and ASV airborne radar sets.


Information source -- Original-techn. papers.   Callick, Metres to Microwaves
-- Original-techn. papers.   C. Paterson, A Scientist's War

mpup_5.png E1046: Manufacturer's Literature
Emilio Ciardiello


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