RELIABLE, LOW COST, STABLE RESISTORS, GENERAL PURPOSE.
Quarterly rept. no. 3, 1 Nov 63-31 Jan 64.
INTERNATIONAL RESISTANCE CO PHILADELPHIA PA
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The qualification test sequences for Rv units were completed with the exception of 1000 hour load life on the 2.7 ohm and 40 ohm units. These tests have shown a minor problem area in wet insulation resistance. They also indicate temperature coefficient capability of 750ppm in the high ranges as was initially envisaged. The temperature load matrix is proceeding according to schedule, with some of the units going into their second 1000 hour period. To date, the units seem to indicate a full load capability at temperatures in excess of the targeted 85C. Extended load life testing of L07 units at ambi ent temperature of 85C has extended to 4000 hours on three groups. There was one additional failure with other resistance changes being negligible. The load life matrix is complete to 1000 hours. The extended load portion of the matrix on selected groups is complete to 4000 hours except for two groups which were accidentally overloaded and removed from test. Substitute groups were placed on and have reached 750 hours. There are no additional failures or any high resistance changes beyond the 1000 hour reading. Author