ULTRAMINIATURE QUARTZ CRYSTAL UNITS
Abstract
Crystal units were fabricated which have quartz elements with a diameter of 0.100 in. Contoured plates were used to operate at 10 mc on the fundamental, and uncontoured plates to operate at 25 mc on the fundamental and at 75 mc on the third overtone. The requirement for a quality factor in excess of 10,000 was met in each case. The units were housed in a glass enclosure with dimensions of 3/16 in. x 5/32 in. x 1/16 in., and were solder sealed at each end. The enclosure ends were metalized with Hanovia 130-A. The elements were mounted with nickel wire 0.002 in. in diameter, using an epoxy cement. Crystal impedances as low as 350 ohms were achieved, as measured in the standard military test set, and data taken included a typical cubic type AT temperature curve. Fabrication methods and tooling are described. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 14, 1961
- Accession Number
- AD0261219
Entities
People
- Jack W. Stringe