PRODUCTION ENGINEERING MEASURE. CR-(XM-53)/U QUARTZ CRYSTAL UNITS.
Quarterly progress rept. no. 1, Nov 64-Jan 65,
BLILEY ELECTRIC CO ERIE PA
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The report reviews the initial period of the combined PEM and Reliability Study of CR-XM-53U quartz crystal units. These units, mounted in glass HC-27 holders, are high-precision crystals in the 1-Mc to 5-Mc frequency range. Intended primarily for use in single-sideband equipment, these high-Q, low-power crystal units are expected to attain a failure rate of only 1 per thousand hours compliance with this goal-requirement is to be demonstrated by a 6-month test of 1000 units. The first report period has seen the establishment of designs for those units at frequencies of two megacycles and above. Preliminary evaluation indicated that these designs are well suited to the CR-XM-53U requirements. An experimental design for the 1-megacycle units has also been derived, but has not yet been evaluated because the special components needed for assembly have not yet been delivered. Author