Accession Number : AD0634447

Title :   QUARTZ CRYSTAL UNITS FOR VERY HIGH FREQUENCIES.

Descriptive Note : Technical rept.,

Corporate Author : ARMY ELECTRONICS COMMAND FORT MONMOUTH N J ELECTRONIC COMPONENTS LAB

Personal Author(s) : Gerber, Eduard A.

Report Date : APR 1966

Pagination or Media Count : 21

Abstract : A method is briefly described for lapping and polishing round quartz crystals in the frequency range 20-180 Mc. The performance of crystals, made by this method, surpasses that of any other known crystals in this range. The average series resistance is 14 ohms at 75 Mc for the third, 40 ohms at 125 Mc for the fifth, and 55 ohms at 175 Mc for the seventh harmonic mode. Methods are described, the application of which will reduce unwanted modes and diminish the influence of the vibrational amplitude upon crystal parameters. (Author)

Descriptors :   (*QUARTZ RESONATORS, VERY HIGH FREQUENCY), (*QUARTZ, PRECISION FINISHING), ETCHING, GOLD, PLATING, ELECTRICAL RESISTANCE, CRYSTAL HOLDERS, HIGH FREQUENCY, PERFORMANCE(ENGINEERING)

Subject Categories : Electrical and Electronic Equipment
      Fabrication Metallurgy

Distribution Statement : APPROVED FOR PUBLIC RELEASE