PRODUCTION ENGINEERING MEASURE: FUNDAMENTAL MODE CRYSTAL FOR FILTERS CR(XM-41)/U

Abstract

Work was continued on the production engineering measurement of fundamental mode filter type crystals CR(XM-41)/U in the 10-30 mc frequency range. During the processing and testing of the 30 mc filter type crystals, about 60% of the cultured quartz units were going out of frequency tolerance during the temperature test. Units of natural quartz manufactured along with cultured quartz remained in tolerances during the temperature run. Investigation revealed that cultured quartz does not have the same temperature coefficient after grinding due to apparent angular shift when crystals have a large amount of quartz removed by grinding. A final design for filter blanks was derived and the preproduction samples were submitted for test.

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Document Details

Document Type
Technical Report
Publication Date
Dec 09, 1962
Accession Number
AD0404822

Tags

Communities of Interest

  • Human Systems

DTIC Thesaurus Topics

  • Coefficients
  • Contracts
  • Diameters
  • Electrodes
  • Electronics
  • Engineering
  • Frequency
  • Intervals
  • Manufacturing
  • Measurement
  • Production
  • Production Engineering
  • Shock Tests
  • Specifications
  • Temperature Coefficients
  • X Rays

Fields of Study

  • Engineering

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