The pew cylindrical substrate was checked for uniformity of weight and weight-to-volume ratio.nReproducibility of metallizing was verified using the atmospheric technique. Fifteen lots of ten units per lot were metallized and variations within each lot and from lot-to-lot were noted. Some of these units were used later for load life and temperature coefficient of resistance testing.nDevelopment of the new solder terminal was completed and its quality was compared to the epoxy terminal using especially the 90° ratio test.nA method of encapsulation was adopted utilizing a ceramic tube, end caps and an epoxy coating.
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