CV35 KLYSTRON REFLEX VALVE, 1942

CV35 Reflex Klystron of 1935. A klystron is a specialized velocity modulated vacuum tube (evacuated electron tube). The pseudo-Greek word klystron comes from a Greek verb referring to the action of waves breaking against a shore, and the end of the word electron.
The reflex klystron contains a REFLECTOR PLATE, referred to as the REPELLER, instead of the output cavity used in other types of klystrons. The electron beam is modulated as it was in the other types of klystrons by passing it through an oscillating resonant cavity, but here the similarity ends. The feedback required to maintain oscillations within the cavity is obtained by reversing the beam and sending it back through the cavity. The electrons in the beam are velocity-modulated before the beam passes through the cavity the second time and will give up the energy required to maintain oscillations. The electron beam is turned around by a negatively charged electrode that repels the beam. This negative element is the repeller mentioned earlier. This type of klystron oscillator is called a reflex klystron because of the reflex action of the electron beam.

In1935 A. Arsenjewa-Heil and O. Heil (wife and husband) were acknowledged for their contribution to velocity modulation theory .

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