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ID = 27666
Great Britain (UK)
Brand: Common type Great Britain tube/semicond.
Developer: Metropolitan-Vickers (Metro-Vick, Cosmos); GB 
Tube type:  MICROWAVE AND RADAR, general   Text 
Identical to CV85 = V2023 = 24B1 = REL38A
Similar Tubes
Normally replaceable-slightly different:
Other base and data slightly different:

Base SPECIAL TUBEBASE in general Top contact with a cap.
Was used by Radar

Spark Gap Trigatron for Delay line discharge/pulse forming in radar modulators.

  • 12 pulses per second at 12kV max.
  • Peak current 60A.

Hard-glass (pyrex) envelope, filled with argon at 4 atmospheres and oxygen at 20 mm Hg, as quenching agent. The bulb was covered by protective lacquered sock to prevent fragment scattering in case of heavy overloads. Trigatron tubes were made with an extremely high vacuum.The trigger electrode stem was protected by a glass tubing up to the tip.

According to the Virtual Valve Museum data for this tube, it was the first production Trigatron. Available from mid-1942, it was used to drive the CV64 magnetron in H2S radar.

Dimensions (WHD)
incl. pins / tip
x 156 x 70 mm / x 6.14 x 2.76 inch
Weight 200 g / 7.05 oz
Information source

24b9~~7.png CV85: Manufacturer's Literature
Emilio Ciardiello

CV85: Manufacturer's Literature
Emilio Ciardiello

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