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ID = 17541
Great Britain (UK)
Brand: Standard Telephones and Cables Ltd. (STC); London, Foots Cray
Developer: Standard Telephones and Cables Ltd. (STC); London, Foots Cray 
Tube type:  MICROWAVE AND RADAR, general   SHF/EHF (>3 GHz) 
  Ca. 1925 up to 1945 very rare. ***
Identical to CV230 = V230C/1D = DV55
Similar Tubes
Differences not known by us:

Base Octal (Int.Octal, IO) K8A, USA 1935
Filament Vf 6.3 Volts / If 0.3 Ampere / Half indirect

Heil oscillator intended to operate at 10 cm wavelength.

300 mW output power at 265 V resonator voltage.

Probably proposed as local oscillator in airborne radar receivers before the introduction of low-voltage reflex klystrons, as 707A in the late 1941.

  1. N.C.
  2. Heater
  3. Anode
  4. G2
  5. Resonator
  6. G1
  7. Heater / Cathode
  8. N.C.





Information source Taschenbuch zum Röhren-Codex 1948/49   
-- Original-techn. papers.   
CV230: Private collection
Emilio Ciardiello


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