DEVELOPMENT OF TWO X-BAND VARIABLE GAIN TWTS (ONE LOW LEVEL AND ONE MEDIUM LEVEL).
Interim development rept. no. 2, 1 Oct-31 Dec 64,
MICROWAVE ELECTRONICS PALO ALTO CALIF
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Two tubes were tested to ascertain the best range of gamma a for variable gain operation. The lower gamma a tube provides the best gain control. Two three-helix, variable gain tubes were tested. The gain variation was greater than anticipated, and noise figure and saturated power output exceeded allowable limits. Author