Abstract
ABSTRACTThe paper discusses an improvement over the RCA beading technique for the construction of electron guns for travelling wave tubes. The improved technique requires only a simple demountable jig for aligning, supporting and controlling the spacing of the electrodes to a close tolerance. It eliminates the undesirable heating of the entire jig along with the electrodes during the glass-beading, and presents deformation of the glass rod after softening. The cathode and heater mounting is also such that alterations are possible. A number of special electron-tubes built here have utilized this technique successfully.
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