1、 INCH-POUND MIL-DTL-24643/65A 28 January 2010 SUPERSEDING MIL-DTL-24643/65 1 March 2007 DETAIL SPECIFICATION SHEET CABLE, ELECTRICAL, TYPE LS3C179DT (INCLUDING VARIATION LS6C179DT) This specification is approved for use by all Departments and Agencies of the Department of Defense. The requirements f
2、or acquiring the product described herein shall consist of this specification sheet and MIL-DTL-24643. This cable can be manufactured in two variations: LS3C179DT (three internal coaxial cables) and LS6C179DT (six internal coaxial cables). Construction (Non-Watertight) First - Copper conductor, coat
3、ed or uncoated, in accordance with ASTM B286, 0.0122-inch diameter. Second - Thermoset insulation, diameter 0.056 inch nominal. Third - Light bonded aluminum foil-polyester tape, aluminum foil shield. Foil in contact with braid. Fourth - Braided shield of 38 AWG tin-coated copper: minimum coverage 9
4、5 percent, diameter 0.079 inch nominal. Fifth - Cross-linked polyolefin jacket. Diameter 0.1000.005 inch. Sixth - The required number of coaxial cables cabled together with a lay in accordance with 3.4.9 of MIL-DTL-24643. Fillers may be used as necessary to make a firm, well-rounded assembly. Sevent
5、h - An optional binder. Eighth - Tinned copper braid, 36 gauge, 90 percent coverage. Ninth - Cross-linked polyolefin jacket. Minimum thickness of 0.040 inch. AMSC N/A FSC 6145 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-24643/65A TABLE I.
6、 Details. Overall diameter (inches) Military part no. M24643/65 Size Number of coaxes Diameter over shield (inches nominal) Cable jacket thickness min. avg. (inches) Min. Max. Cold bend mandrel diameter (inches) -01UO 3 3 0.240 0.047 0.335 0.365 4.0 -02UO 6 6 0.325 0.050 0.425 0.455 5.0 REQUIREMENTS
7、 Qualification Required. INSPECTION: Basic Electricals: Conductor resistance (ohms/1000 feet at 25 C, max.) 110 Voltage withstand (volts, root mean square, min.) Conductor to conductor 2000 Conductor to shield 1000 Insulation resistance (megohms/1000 feet, min.) Conductor to conductor 500 Conductor
8、 to shield 500 Jacket flaws No failure Conductor and shield continuity No failure Group A: Visual and dimensional No failure Characteristic impedance (ohms) 755 (TDR method in accordance with characteristic impedance of MIL-DTL-17) Group B: Thermoset proof test (percent, max.) Overall jacket 50 Cold
9、 bending, cable mandrel diameter 12 times cable diameter No damage Bending endurance (at 25+2 C, cycles, min.) 25 Tear (lb/in thickness, min.) (ASTM D470) 35 Physicals (unaged) Insulation Tensile strength (lb/in2, min.) 600 2 Provided by IHSNot for ResaleNo reproduction or networking permitted witho
10、ut license from IHS-,-,-MIL-DTL-24643/65A Elongation (percent, min.) 200 Jacket (component) Tensile strength (lb/in2, min.) 1000 Elongation (percent, min.) 100 Jacket (cable) Tensile strength (lb/in2, min.) 1300 Elongation (percent, min.) 160 Group C: Physicals (aged) (air oven) Insulation Tensile s
11、trength (percent of unaged, min.) 80 Elongation (percent of unaged, min.) 80 Jacket (components) Tensile strength (percent of unaged, min.) 60 Elongation (percent of unaged, min.) 60 Jacket (cable) Tensile strength (percent of unaged, min.) 60 Elongation (percent of unaged, min.) 60 Shrinkage No fai
12、lure Heat distortion (percent of unaged, max.) 30 Permanence of printing (jacket) (cycles, min.) 125 Group D: Flame propagation (cable) No failure Qualification Inspection: Qualification inspection shall include basic electricals; groups A, B, C, and D; plus the following: Aging stability (cable) (9
13、82 C) No failure (Test in accordance with aging stability of MIL-DTL-17) Dimensional stability (cable) (852 C) No failure (Test in accordance with dimensional stability of MIL-DTL-17) Abrasion resistance (overall jacket) (scrapes, min.) 75 Acid gas equivalent (percent, max.) Jacket (component and ov
14、erall) 2 Fillers 2 Insulation 183 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-24643/65A 4 Shield insulation 2 Halogen content (percent, max.) Jacket (component and overall) 0.2 Fillers 0.2Insulation 0.2Immersion (jacket) Tensile strength
15、percent of unaged, min.) 50 Elongation (percent of unaged, min.) 50 Smoke index, max. Jacket (component and overall) 25 Fillers 45Insulation 45 Toxicity index, max. Jacket (component and overall) 5 Fillers 5Insulation 1.5Durometer (overall jacket) Type A (hardness, min.) 80 Weathering (overall jack
16、et) No failure UNIT ORDERING LENGTHS: Type and size Feet (nominal) LS3C179DT, LS6C179DT All sizes 500 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:
17、 Army MI Navy SH Navy SH (Project 6145-2009-108) Review Activities: Army AR, AV, CR Navy CG, EC DLA CC 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 http:/assist.daps.dla.mil. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
