• on Education & Information
  • Published in issue 11/2009 on page 76
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Klystrons type 2K25 and 2K56

Retronics series

Klystrons type 2K25 and 2K56
The klystron was invented, and a first prototype constructed, by the brothers Sigurd and Russel Varian working at Stanford University (CA) in 1937. After a paper on the new device appeared in Journal of Applied Physics in 1939, radar experts were soon upon the brothers and not surprisingly the klystron was embraced big time by the US military. The klystron’s heyday was to last, well, about 50 years.
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