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ID = 27884
Great Britain (UK)
Brand: GEC, General Electric Co.; London
Tube type:  Transmitting Triode, air cooled   UHF 
Identical to E1190 = CV155
Similar Tubes
Other characteristic (electr. data):
Successor Tubes CV55   E1458  

Base Wires Sidecontact and top contact.
Was used by Radar
Filament Vf 6.3 Volts / If 2.7 Ampere / Half indirect

GEC experimental code for a milli-micropup triode capable of operation up to 1.200 MHz. According to the diary of Paterson, small quantities of this tubes had been sampled as early as March 1940. Certainly early prototypes used thoriatwd-tungsten direct emitting cathodes. The oxide coated unipotential cathode must have been introduced only from May or June 1940 onwards, after Megaw had experimented with this innovative solution on E1189 No. 2. 

Megaw was testing these tubes on a 25 cm experimental prototype when first samples of his E1189 cavity magnetrons were eventually available. Any further development of the 25 cm airborne radar system was then abandoned.

  • Pa 50 W
  • Peak emission 20 A
  • Fmax 1200 MHz
Information source Babani, International Radio Tube Encyclopaedia   
-- Original-techn. papers.   CV155 spec sheet
E1190: Manufacturer's Literature
Emilio Ciardiello


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