Trip to General Ceramics, November 19-20, 1952

Abstract

A trip to General Ceramics and Steatite Corporation is reported. Calibration of the Tektronix 513-D Oscilloscope used in conjunction with ferrite-core pules-test equipment showed the internal voltage calibrator to be accurate in the region of 0.2 v while the sweep speed calibration was off as much as 20 per cent on some ranges. Results of tests made on the ferrite-core tester at MIT and repeated on the at General Ceramics showed excellent agreement. A new type test jig in which cores to be tested are mounted on a piece of brass tubing gives results the same as the old test jig. Tests on a sample of new MF-1326B, and F-291, cores showed much better uniformity than previous cores of this type.