Accession Number : AD0622206

Title :   PEM QUARTZ CRYSTAL UNITS, FILTER LOW FREQUENCY, 1 MC TO 10 MC TYPES CR-(XM-49)/U THRU CR-(XM-52)/U PER SCS-191.

Descriptive Note : Quarterly progress rept. no. 4, 1 Apr-30 Jun 65,

Corporate Author : PIEZO CRYSTAL CO CARLISLE PA

Personal Author(s) : Matistic,A. S.

Report Date : AUG 1965

Pagination or Media Count : 28

Abstract : The report covers the following: fabrication and submission of the 3rd set of engineering samples and details of a mass loading experiment at 5 mc. The 3rd set of engineering samples - 5 crystal units each at frequencies 1.75 mc, 5 mc, 6 mc, 7.5 mc and 10 mc - consisted of a planoconvex design at 1.75 mc and a flat plate design (incorporating mass loading) at the 4 remaining frequencies. Although filter response characteristics were satisfactory for all 5 frequencies, obtained series resistance values and plateback amounts were excessive at frequencies 5 mc, 6 mc and 7.5 mc. The mass loading experiment was performed on 5 mc crystal blanks in an attempt to obtain reduced platebacks (for required unwanted mode suppression) and lower series resistance values. (Author)

Descriptors :   (*CRYSTAL FILTERS, MANUFACTURING), (*QUARTZ, CRYSTAL FILTERS), HIGH FREQUENCY, MEDIUM FREQUENCY, CRYSTAL HOLDERS, PERFORMANCE(ENGINEERING)

Distribution Statement : APPROVED FOR PUBLIC RELEASE