MIL-PRF-1/1055F
TABLE I. Testing and inspection - Continued.
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This test shall be performed during the initial production and once each succeeding 12-calendar months in
which there is production. A sampling plan shall be used, with a sample of six tubes having an acceptance
number of zero defects. In the event of failure, the test will be made as part of conformance inspection,
part 2. Acceptance shall be based upon accept on zero defects (c = 0) sampling plan, in accordance with
table III of MIL-PRF-1. The regular "12-calendar month" sampling plan shall be reinstated after three
consecutive samples have been accepted.
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The specified voltage shall be applied between anode and grid. No other voltages shall be applied. The
TUT shall be excited under specified conditions at atmospheric pressure for 10 seconds minimum. There
shall be no evidence of arc-over or instability as evidenced by significant variations observed in the
waveform of the applied voltage. Should arcing occur during the 10-second period, the TUT shall
subsequently operate for 60 seconds minimum without arcing. The pressure shall then be reduced to
specified conditions and the TUT must operate for another 60 seconds minimum without visible arc-over.
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Revision letters are not used in this revision to identify changes with respect to the previous issue, due to the
extensiveness of the changes.
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Acceptance shall be based upon accept on zero defect (c = 0) sampling plan, in accordance with table III of
MIL-PRF-1.
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Direct questions about the availability of JAN drawings to the preparing activity: DSCC-VAT, Defense Supply
Center Columbus, P.O. Box 3990, Columbus, OH 43216-5000.
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