combiners. Specific requirements tailored for ┬ôspace flight application┬ö components are included to represent the highest reliability components specified herein. Such components are intended for use in NASA manned, satellite, interplanetary or launch vehicle programs.

Pages 1 - 2 - 3 - 4 - 5 - 6 - 7 - 8 - 9 - 10

MIL-DTL-23971D

Corrosion-resisting steel, sheets, and strips shall conform to ASTM-A240/A240M, ASTM-A666 and ASTM-

A693.

Corrosion-resisting steel bar, shapes, and forgings shall conform to SAE-AMS-QQ-S-763, ASTM-

A484/A484M, and ASTM-A582

Copper alloy sheet shall conform to ASTM-B36/B36M, ASTM-B121/B121M, ASTM-B16/B16M, and ASTM-

B124/B124M.

3.3.1.2 Iron nickel. Iron nickel alloys shall conform to SAE-AMS-I-23011 and SAE-AMS-QQ-N-290.

3.3.1.3 Gold. Gold shall conform to MIL-DTL-45204, or SAE-AMS2422 and ASTM-B488.

3.3.1.4 Dissimilar metals. Unless suitably protected against electrolytic corrosion, dissimilar metals as defined in

MIL-STD-889 shall not be in intimate contact.

3.3.2 Plastic. Plastic shall conform to best manufacturing practice.

3.3.3 Rubber. Rubber shall conform to MIL-PRF-23586.

3.3.4 Fungus inert. Materials used in the construction of power dividers, power combiners, and power

divider/combiners herein shall be fungus inert in accordance with ASTM-G21. Fungus inert material is defined as a

material which, in all modified states and grades, is not a nutrient to fungi.

3.4 Design and construction. Items furnished under this specification shall be of the design, construction, and

physical dimensions specified (see 3.1).

3.4.1 Impedance. The nominal impedance shall be as specified (see 3.1).

3.4.2 Operating frequency range. The frequency range shall be as specified (see 3.1).

3.4.3 Ambient temperature. The ambient temperature shall be as specified (see 3.1).

3.4.4 Headers. When headers are required (see 3.1), they shall conform to MIL-H-28719.

3.4.5 Terminals and pins. External terminations shall be aligned and identified as specified (see 3.1).

3.4.6 Coaxial connectors. The material design and construction of coaxial connectors, when required (see 3.1),

shall conform to MIL-PRF-39012.

3.4.7 Waveguide flanges. Unless otherwise specified (see 3.1), flanges shall mate electrically and mechanically

with flanges covered by MIL-DTL-3922.

3.4.8 Connector caps. All waveguide and coaxial connections shall be sealed with push-on caps to prevent

damage and the entrance of moisture or foreign material during storage.

3.4.9 Waveguide. The material design and construction of waveguides used in the items, when required

(see 3.1), shall conform to MIL-DTL-85.

3.4.10 Finish.

3.4.10.1 Mating surfaces. Unless otherwise specified (see 3.1), the finish of mating surfaces shall be of gold,

nickel, silver, or tin in accordance with the appropriate specifications: MIL-DTL-45204, SAE-AMS2422, ASTM-B488,

SAE-AMS2404, SAE-AMS-QQ-N-290, ASTM-B700, ASTM-B545 (as restricted, see 3.4.10.3) or ASTM-B339 (see

3.4.10.3). Nickel shall be used only if other materials are unable to meet performance requirements of this

specification.