ANORDNING FOR AA MOTVIRKE KATODESTROEMOEKNINGEN SOM UNDER OPPVARMINGSPERIODEN OPPSTAAR I ET VANDREBOELGEROER SOM FOELGE AV ENDRINGEN AV GITTER-KATODE AVSTANDEN

摘要

Apparatus for compensating the injurious increase of the cathode current occurring during the initial operation period of a travelling-wave tube when, during successive warming-up, the grid first approaches the cathode and then assumes the nominal distance therefrom. The apparatus includes a distance control device measuring the deviation between the actual grid-cathode distance and the nominal distance and generating a control signal proportional to the deviation for reducing the value of the grid voltage.