PRODUCTION ENGINEERING MEASURE FOR CERAMIC FILTERS.
Quarterly rept. no. 7, 30 Sep-29 Dec 64,
CLEVITE CORP BEDFORD OHIO
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Tumble grinding appears to be an acceptable production technique for tuning small ceramic resonators resonant above 1 Mc. However, it will have to be supplemented by frequent sampling of the resonant frequencies and considerable sorting of resonators falling within the desired frequency range. The use of helical compression springs in the ladder filter assembly will eliminate the major packaging problem. This problem has been traced to inadequate control of contact forces. The use of helical springs will provide greater reliability and more consistent filter selectivity characteristics after packaging. Author