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MIL-DTL-55288 Antenna As-1729/VrcThis specification covers one type of center-fed whip antenna intended for use in a vehicular communications system operating over the frequency range of 30.00 to 76.00 MHz and designated as Antenna AS-1729/VRC \(see 6.1 and 6.6\). The antenna consists of the following units: Antenna Element AT-1095/VRC \(Upper Whip Section\). Antenna Element, AS-1730/VRC \(Lower Whip Section\). Matching Unit-Base, Antenna MX-6707/VRC \(Base Assembly\).

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MIL-DTL-55288E
FIGURE 1. Antenna assembly under test
Ground plane and mast located in reflection free environment.
4.9 Air-seal test (see 3.10). The equipment shall be opened and closed again in such a manner as to break and
remake the seal. Immediately thereafter, the equipment as field transported shall be subjected to a vacuum of 1
pound per square inch (1 pound per square inch less than the atmospheric pressure surrounding the equipment)
applied to the interior of the equipment enclosure. The vacuum then shall be valved-off and the interior pressure
measured during the ensuing period of 2 minutes. During this 2-minute period, there shall be no decrease in
vacuum. The gauge used for measurement of vacuum shall be of such accuracy that any decrease in vacuum can
be readily determined.
4.10 Visual and mechanical inspection. The equipment shall be examined for the defects listed in MIL-STD-252.
4.11 X-ray (see 3.11). The AS-1730/VRC Antenna Element shall be x-rayed along the entire area above the
stainless steel ferrule to determine compliance with 3.11.
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