THIRD QUARTERLY PROGRESS REPORT INVESTIGATION OF MECHANICAL OVERTONE CRYSTALS FREQUENCY RANGE 50 MC TO 150 MC OR HIGHER

摘要

The crystal units recommended for this frequency range employ the standard HC-6 type holder, which its two looped spring wires. The oscillator quartz plate is polished, unplated and mounted between thin quartz discs which are plated centrally on a recessed area to from suitably sized electrodes and airgaps.nThis report describes unsuccessful attempts to produce units of equal or better quality by optical lapping techniques.