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ID = 28460
Tube type:  Reflex Klystron 
Identical to CV238 = KR6/3
Predecessor Tubes 10AL1  

Base Octal (Int.Octal, IO) K8A, USA 1935 Top contact with a cap.
Was used by Radar
Filament Vf 4 Volts / If 1.5 Ampere / Indirect

S-band reflex klystron, derived from CV116. Introduced in 1944 as low-voltage replacement for the previous generation which required about 1400 V resonator voltage.
250V grids, -150V reflector.

Look at this article for the development of British reflex klystrons from the Sutton oscillator.

Information source -- Original-techn. papers.   

8fhc~~1.png CV238: Manufacturer's Literature
Emilio Ciardiello

Just Qvigstad
CV238: Manufacturer's Literature
Emilio Ciardiello

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