MIL-PRF-1/1756B
GENERAL:
Qualification - Required.
Compatibility testing - Required
(In addition to the requirements specified herein, compatibility testing shall be required in the
AN/URN-3 and AN/GRN-9 equipments. A sample of 20 tubes shall be supplied to Naval Air Test
Center (NESTED), Patuxent River, Maryland 20670 on a noninterference basis, to be tested for
freedom from oscillation, adequate gain and tuning capability, and good tracking, in both low and
high band heads. Also, of the 20 tubes supplied, a sample of four tubes shall be selected for life
testing. Each tube shall achieve a minimum of 500 hours operation. In the event of no failures
the sample shall be considered as a acceptable when a total of 1,600 hours has been
accumulated.
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