Accession Number : AD0616256

Title :   QUARTZ CRYSTAL UNIT CR-(XM-37)/U.

Descriptive Note : Quarterly progress rept. no. 10, 1 Oct-31 Dec 64,

Corporate Author : VALPEY FISHER CORP HOLLISTON MASS

Personal Author(s) : Gillin,Norman R.

Report Date : 31 DEC 1964

Pagination or Media Count : 20

Abstract : In view of 70 ohm maximum effective resistance of SCS-75 and the test results on preproduction lots, Technical Action Request 3 was submitted requesting 90 ohms maximum. This request was approved 19 November, 1963. Due to subsequent failure of some preproduction units in Salt Spray and Moisture Resistance, the soldering and sealing procedures were revamped. Five units out of thirty tested exceeded frequency tolerance during Temperature Test. This was corrected by slightly lowering angle of cut and by more careful temperature testing in the TS-15 test oscillator. (Author)

Descriptors :   (*QUARTZ RESONATORS, MANUFACTURING), ELECTRICAL RESISTANCE, SOLDERING, SEALS(STOPPERS), CRYSTAL HOLDERS, CRYSTAL OSCILLATORS, INDUCTANCE, CAPACITANCE, VIBRATION, AGING(MATERIALS), QUALITY CONTROL, PERFORMANCE(ENGINEERING)

Distribution Statement : APPROVED FOR PUBLIC RELEASE