Accession Number:

AD0263447

Title:

RESISTORS, FIXED FILM TYPE GENERAL PURPOSE

Descriptive Note:

Corporate Author:

INTERNATIONAL RESISTANCE CO PHILADELPHIA PA

Personal Author(s):

Report Date:

1961-03-31

Pagination or Media Count:

1.0

Abstract:

Test results from matrix 1 reveal that the RC20 unit passes all tests except 175 C no-load. Moisture cycle failures were traced to improper test fixturing. The fixturing was revised and subsequent moisture cycle tests showed that the failures assignable to test fixturing were eliminated. The maximum limit for unspiralled ranges that will meet temperature coefficient requirements is 5000 ohms. Significant improvements were made to the drawing, sandblast, and gas flow control stations of the filament machine. The roller overcoating machine operated satisfactorily. The RC20 unit was molded with excellent results. A mechanism of failure study was initiated to determine the reason for erratic performance during the 175 C no-load test. Preliminary results reveal that stresses caused by mold jacket shrinkage may be detrimental to performance. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE