MIL-DTL-18793B
3.2.8 Mating surfaces. When the UG-58/U, or equivalent, connector is mounted on the antenna, the mating
surfaces shall be clean metal surfaces, free from all anodizing, grease, paint, lacquer or similar high resistance film,
so as to insure negligible radio frequency impedance between the connector and the antenna sleeve.
3.2.9 Weight. The antennas shall be of the lightest practicable weight consistent with the other requirements of
this specification and in no event shall the installed weight of the antennas exceed 1.5 pounds. Installed weight shall
include the complete antenna assembly with nameplate and receptacle, but shall not include cabling external to the
antenna, plugs, mounting nuts or bolts, or any mounting bracket or fastening device which is not an integral part of
the antenna assembly.
3.2.10 Identification of product.
3.2.10.1 Nameplates and nomenclature. Nameplate and nomenclature approval and assignment shall be granted
by the Naval Air Systems Command only upon compliance with the applicable requirements of MIL-DTL-18307.
3.2.10.2 Use on AN or MIL designations. AN or MIL designations shall not be applied to a product except for
preproduction test samples, nor referred to in correspondence, sales matter or otherwise, until notification has been
received from the Naval Air Systems Command that the product has been approved. When the antenna is acquired
by a prime contractor through subcontract, purchase order, or otherwise (not including Government furnished) the
prime contractor shall be responsible for compliance with the requirements of 3.2.3 and approval, when granted, will
extend only to that one antenna source or to that one prime antenna contract.
3.2.11 Performance. The antenna shall be so designed that when mounted in the center of a large horizontal
ground plane, it shall provide vertically polarized radiation of essentially uniform intensity over 360 degrees of
azimuth. The antenna shall satisfy the verification requirements which are outlined in section 4 when subjected to the
following tests:
3.2.11.1 Radiation test. Radiation test shall be in accordance with 4.5.3 and shall satisfy the delta limit criteria of
3.2.11.2 Resistance test. Resistance test shall be in accordance with 4.5.2.
3.2.11.3 Voltage standing wave ratio (VSWR) test. VSWR test shall be in accordance with 4.5.4 and shall pass
the delta criteria of 4.5.4.
3.2.12 Pure tin. The use of pure tin as an underplate or final finish is prohibited both internally and externally. The
content of the antenna components and solder shall not exceed 97 percent, by mass. Tin shall be alloyed with a
minimum of 3 percent lead, by mass (see 6.8).
3.3 Recycled, recovered, or environmentally preferable materials. Recycled, recovered, or environmentally
preferable materials should be used to the maximum extent possible, provided that the material meets or exceeds the
operational and maintenance requirements, and promotes economically advantageous life cycle costs.
3.4 Workmanship. All details of workmanship shall be in accordance with the best manufacturing practice for high-
quality electronic equipment. Particular attention shall be given to neatness and thoroughness in the making of parts,
plating, soldering, and finishing.
4. VERIFICATION
4.1 Classification of inspection. The inspection and testing of antennas shall be classified as follows:
a.
Contractor tests (see 4.2)
b.
Preproduction tests (see 4.3)
c.
Inspection tests (see 4.4)
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