CV150

This was the only pulse power klystron used at least in British experimental radar and navigation sets during WWII. In origin it was developed to replace the magnetron transmitter in H2S airborne radar sets in operations over continental Europe. This to prevent the capture of the then super-secret magnetron by German troops.
According to Sir Bernard Lowell in his 'Echoes of War' in December 1941 EMI received contracts for 50 Oboe Mark IIB, klystron fitted H2S sets. Unfortunately all the EMI staff, leaded by Alan Blumlein, dead in a plane crash during the comparative tests of H2S radar sets. The entire program was canceled.

CV150 accepted input pulses of 12 kV at 12.5 A, giving output pulses of 30 kW at 3188 MHz. Cathode emission was in the order of 25 A. These figures exceeded that of the CV38 magnetron but of course were soon outdated by the new families of strapped magnetrons. Ed Ginzton, Professor in Physics at Stanford and cofounder of Varian, left an accurate description of the CV150, impressed for its solutions and performances.

Here an article on the development of this tube.

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