Heil Tube - or Coaxial-line velocity modulated oscillator valve
The Heil Tube is the forerunner of the Klystron. In 1935 A. Arsenjewa-Heil and O. Heil, a husband and wife team, made the tube as an RF oscillator. It works by velocity modulation of an electron beam. An RF voltage applied across the interaction region between the focus electrode and the drift tube causes this velocity modulation. Faster electrons from one cycle catch up with slower electrons from the previous cycle, which causes bunching of the electrons in the beam by the time they reach the interaction region between the drift tube and the second electrode.
Reference: A. Arsenjewa-Heil and O. Heil, Zeitschr. fûr Physik, Vol. 5, 1935, p. 752
This table was made up from information supplied and from observations of actual tubes:
(For the CV485, separate examples showing V246A/1K and V246A/2K are known. The Ministry "EVS" books show CV485 as a 'selected' CV228 so the two are clearly closely related.)
Thanks to Jan Heering and Frank Philipse for providing information and reference material
This file was last modified
14:49:37, Tuesday September 02, 2014
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