Pem for Filter, Quartz Crystal, 112 mc, Type El-Fr (X-2) and Crystal Unit, Filter, Quartz Types Cr-(XM-64)/U and Cr-(XM-65)/U

摘要

The objectives and requirements of this program are described. Filter design considerations are discussed briefly. Results of the initial crystal investigation are given. Spurious modes have been suppressed by 20 to 30 db on experimental units and the Q requirements of 60,000 have been obtained. (Author)