Accession Number : AD0263894

Title :   RESISTORS, FIXED FILM TYPE GENERAL PURPOSE

Corporate Author : INTERNATIONAL RESISTANCE CO PHILADELPHIA PA

Personal Author(s) : BURNS,JEROME G.

Report Date : 30 JUN 1961

Pagination or Media Count : 1

Abstract : Further experimentation on filament performance has provided additional proof that performance is tolerant to deposition parameters and that an interaction between the film, termination, or protective system causes the differences in performance. Results of an experiment comparing CP40D to CPHS indicate that the contribution of termination to the performance of critical range units is small. Comparison of overcoats PC29 and PC33 showed similar performance, except for moisture polarization and opens. In these instances, PC29 was superior. In comparing mold powders, XM1127 showed better performance than DAP5201 on 175 C no-load and 100 C load-life; but on moisture cycle, DAP5201 was better. RC20 base-range resistors (500 to 5000 ohms) were subjecte to preproduction testing. All ranges exceeded the number of defectives allowable on one or more tests. This pre-production run is being repeated and the units are now on test. A new mold powder and a new CP are being evaluated to improve 175 C no-load. (Author)

Descriptors :   *FIXED RESISTORS, *RELIABILITY, *RESISTORS, COATINGS, FILMS, INHIBITION, MANUFACTURING, MATERIALS, MOLDINGS, MOLDING MATERIALS, OXIDATION

Distribution Statement : APPROVED FOR PUBLIC RELEASE