MIL-DTL-25707F
(3)
Requirement for concurrent delivery of each sample and its test data. The acquiring activity should be given at
least 10 days prior notice when the first article tests are to be conducted so that they may be supervised or
witnessed, if desired, by a Government representative.
(4) Whether or not for individual procurements involving small quantities of antennas, first article inspection
requirements are waived for manufacturer with a history of reliability and a service life warranty.
(5) Group B samples and tests.
6.3 Definitions.
6.3.1 Antenna. An antenna for the purpose of this document is an assembly of components including input terminal mounting
provisions and radomes required to radiate or to receive electromagnetic energy.
6.3.2 Band of doubt. A VSWR value is considered to be in the band of doubt if the measured VSWR = (the maximum allowable)
VSWR ± 0.08 (the maximum allowable VSWR-1). If VSWR values are within the band of doubt, a frequency band of ± 10 percent
must be investigated about the point.
6.4 Acquiring activity. The activity responsible for all antennas acquired under this specification is the acquiring activity.
This
activity is responsible for all waivers of first article testing.
6.5 Subject term (key word) listing.
Altitude
Radiation
Attenuation
Salt fog
Fungus
Seal
Impedance
Shock
Nonflammable
Solvents
Polarization
VSWR
6.6 Environmentally preferable material. Environmentally preferable materials should be used to the maximum extent possible
to meet the requirements of this specification. As of the dating of this document, the U.S. Environmental Protection Agency (EPA)
is focusing efforts on reducing 31 priority chemicals. The list of chemicals is available on their website at
https://www.epa.gov/epaoswer/hazwaste/minimize/chemlist.htm. Further information is available at the following EPA site:
https://www.epa.gov/epaoswer/hazwaste/minimize/. Included in the EPA list of 31 priority chemicals are cadmium, lead, and
mercury. Use of the materials on the list should be minimized or eliminated unless needed to meet the requirements specified
herein (see Section 3).
6.7 Tin whisker growth. The use of alloys with tin content greater than 97 percent, by mass, may exhibit tin whisker growth
problems after manufacture. Tin whiskers may occur anytime from a day to years after manufacture and can develop under typical
operating conditions, on products that use such materials. Conformal coatings applied over top of a whisker-prone surface will not
prevent the formation of tin whiskers. Alloys of 3 percent lead, by mass, have shown to inhibit growth of tin whiskers (see 3.3.3).
For additional information on this matter, refer to ASTM-B545 (Standard Specification for Electrodeposited Coatings of Tin).
6.8 Changes from previous issue. Marginal notations are not used in this revision to identify changes with respect to the
previous issue due to the extent of the changes.
Custodians:
Preparing activity:
Air Force - 11
DLA - CC
DLA - CC
(Project 5985-2008-010)
NOTE: The activities listed above were interested in this document as of the date of this document. Since organizations and
responsibilities can change, you should verify the currency of the information above using the ASSIST Online database at
13
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