Downloaded from https://www.everyspec.com MIL-STD-1311D METHOD 1036A BUMP USE TEST METHOD 1042B 1. Purpose. Normally used to check the brittleness of the filaments in tubes having thoriated tungsten filaments and to check the quality of ceramic insulators. 2. Bump. Each tube shall be mounted in a vertical position in the standard bump-test equipment shown on Drawing 123-JAN. No electrical potentials shall be applied to the tube during this test. The hammer arm shall be released from the angle specified on the TSS and allowed to strike the glass envelope one blow at an angle of 45 degrees to the plane of the press seal.
The hammer shall strike the tube in such position that free pendulum motion is obtained without excessive wobble. This test shall be performed three times. Subsequent to this test, the tube shall comply with all applicable mechanical requirements and meet the limit(s) of all tests specified as conformance inspection, part 1 of the TSS. 3. Bump and short. Each tube shall be tested as specified in 2 above, and in addition, suitable indicating potentials shall be applied to the various electrode combinations through a short-indicating device. There shall be no shorts, momentary or permanent, between the elements during this test. NOTE:
An alternate test may be substituted if performed on shock test equipment using a G level and pulse duration equivalent to that obtained when using this method with the hammer angle as specified on the TSS. (See 4.6.) (Obsolescent) METHOD 1036A 1036-1 25 March 1970