SECULAR STABILITY OF MILITARY-TYPE, LOWFREQUENCY QUARTZ CRYSTAL UNITS.
ARMY ELECTRONICS COMMAND FORT MONMOUTH N J
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The report summarizes the aging data obtained on several military-type quartz crystal units in the frequency range 80.0 kcs to 500.0 kcs. The resonator plates of these units are NT-, DT-, CT- and 5 degrees X cuts of quartz. Aging data is presented in Frequency Variation vs - Time Graphs and Scatter Diagrams. Author