The major developments during this report pericd centered around elements of the Crystal Measurements Standard. Some crystal measurement data were obtained principally to evaluate various sources of error in the system. As a result of these data it was found necessary to construct various radio-frequency ampli¬fiers to provide isolation between the Marconi Signal Generator and the Admittance Meter.nA new General Radio Admittance Meter with special calibration curves was re¬ceived together with various standard terminations. This equipment was not com¬pletely evaluated.
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