PRODUCTION ENGINEERING MEASURE CR-(XM-40)/U HIGH-PRECISION CRYSTAL UNITS.
Final rept., 29 May 61-29 Nov 63,
BLILEY ELECTRIC CO ERIE PA
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The CR-XM-40U units have a frequency stability of better than 5 parts in 10 to the 10 per day aging, a frequency stability of better than 1 part in 10 to the 9th for a 1-db change in drive level, and a frequency stability of at least 1 part in 10 to the 7th for 30g, 11 millisecond chock. The nominal frequency is 2.5 megacycles tolerance on nominal is 1.5 cycles. The units use gold-plated quartz resonators, horizontally mounted in evacuated, T-11 size glass holders. The crystals are designed to operate on the fifth overtone mode, into a load capacitance of 50 pf. They are intended to operate at a constant temperature, in the region from 43 C to 57 C, as specified for each unit by the manufacturer. A brief review is presented of the project and includes a Process Manual which gives details of all processing operations, outlines the quality control plan which was used to monitor and control the production, and describes equipment and testing techniques. Author