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ID = 12281
Great Britain (UK)
Brand: GEC, General Electric Co Ltd., GENALEX; London
Tube type:  MICROWAVE AND RADAR, general 
Identical to VI507 = CV86
Similar Tubes
Normally replaceable-slightly different:
  10E/467 ; CV1507 ; REL21 ; VI507C
Successor Tubes VI507C  

Description Spark gap switch to be used as TR switch. This is the first sealed device designed by N.L. Harris of GEC. Tungsten tipped electrodes, covered by glass over their length to limit the zone of discharge. 0.4 mm distance. The device was filled with argon and a small amount of mercury. 100 us recovery time. Several hundred hours useful life at 25KW.
Approved as CV86 in April 1941. 
Information source Taschenbuch zum Röhren-Codex 1948/49   
-- Original prospect or advert   Callick, Metres to Microwaves
Tube Lore (I)

VI507: Manufacturer's Literature
Emilio Ciardiello

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