BL-221 70 GC MAGNETRON: PRODUCTION ENGINEERING MEASURES PROGRAM
Final rept. sect. 1 and 3, vol. 1, 6 Aug 61-6 May 1964
VARIAN ASSOCIATES INC BEVERLY MA BOMAC DIV
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Production Engineering Measures were applied to the 70 Gc magnetron developed on a previous R and D contract. The four major changes in the tube and process design were 1 a change from a glass output window to a ceramic output window, 2 an improved integral cathode centering device, 3 additional finish treatment of assembly to prevent corrosion in storage and 4 increased vacuum and other cleaning processing of internal parts to improve life. Studies were made on frequency tunability, and integral ion pump appendage modifications. These were not incorporated. A specification in the MIL Format was proposed and approved and the tube was registered under the number 8558. A hobbed anode manufacturing facility and capability was established at Bomac as a second source to other such facilities. Bomacs facility is established to perform hot hobbing and is at present being used to make anodes from 16 to 70 Gc. Preproduction Approval Testing was performed on five tubes with no failures and the procedures and data are included.
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