MIL-DTL-18793B
3.1.1 Non-standard part approval and material approval. All non-standard parts or materials (parts or materials
which do not comply with MIL-E-5400) of an electrical nature or methods of manufacture therefore` and techniques
and procedures involving their use and application shall be submitted to the Naval Air Systems Command (see 2.2.2)
for approval as required by MIL-E-5400.
3.1.2 Design objectives. Minimum weight, simplicity of operation and an improvement in the performance and
reliability of the specific functions beyond the requirements of this specification are objectives in the design of the
equipment specified herein. In accordance with 3.1, the material, parts, mechanical assemblies, and manufacturing
processes shall be in accordance with the requirements of MIL-E-5400; however the use of other materials, parts and
processes shall be investigated and if it appears that a substantial reduction in weight or improvement in simplicity or
performance can be realized by their use, a request for approval of a non-standard part shall be submitted to the
Naval Air Systems Command (see 2.2.2) for consideration. Each request shall be accompanied by complete
supporting information.
3.1.3 Soldering. Unless otherwise specified, only non-corrosive core solder in accordance with J-STD-004, J-STD-
005 and J-STD-006, class A, shall be used (see 3.2.12 and 6.7). Cleaning flux, such as sal ammoniac, shall not be
used. Alcohol may be used for cleaning after tinning and soldering (see 3.2.12 and 6.7). Mechanical loads shall not
be imposed on soldered connections.
3.1.4 Dielectric material. The dielectric material or materials used on the antenna shall be chosen so that the
antenna will best fulfill the requirements of this specification. The fiberglass used in the construction of the antennas
shall be made of Corning Glass Works type ECC-11-162 (or finer mesh) glass cloth, or equivalent, and shall be
impregnated with Bakelite Corporation type BRS-16631 resin, or equivalent.
3.2 General design requirements.
3.2.1 General. The antennas shall be designed to meet the requirements of MIL-E-5400 except that in case of
conflict between the requirements of MIL-E-5400 and the requirements of this specification, the requirements of this
specification shall apply.
3.2.2 Construction. The antenna shall have the dimensions and general features of construction shown on Naval
Air Systems Command Drawings E-1529, E-1530, and 49A1H2 (see 2.2.2).
3.2.3 Interchangeability. The antenna shall be so constructed that units of the same type with different serial
numbers or manufactured by different manufacturers will be physically and electrically interchangeable.
Interchangeability shall be measured against a model or drawings as specified by the acquiring agency for that
purpose.
3.2.4 Tropicalization. The antenna shall insofar as practicable be fungus proofed by selection of parts and
materials non-nutrient for fungus or the parts and materials shall be treated prior to their use in the antenna so that
over all spraying of the equipment is not necessary. Overall spraying of the equipment in accordance with MIL-T-152
shall be made in the event selection of parts and materials described above is not practicable.
3.2.5 RF connectors. The radio frequency (RF) connectors included as a part of the antenna assembly covered by
this specification shall be UG-58/U, or equivalent, and shall be in accordance with MIL-PRF-39012.
3.2.6 RF cable. The RF cable included as a part of the antenna assembly covered by this specification shall be
RG-58/U and shall be in accordance with MIL-DTL-17.
3.2.7 Impregnated fiberglass. The fiberglass used in the construction of the antennas shall be made of Corning
Glass Works ECC-11-162 (or finer mesh) glass cloth, or equivalent, and shall be impregnated with Bakelite
Corporation type BRS-16631 resin, or equivalent.
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