1、 MIL-DTL-3890C 01 August 2013 SUPERSEDING MIL-DTL-3890B 26 March 2004 DETAIL SPECIFICATION LINES, RADIO FREQUENCY TRANSMISSION (COAXIAL, AIR DIELECTRIC), GENERAL SPECIFICATION FOR This specification is approved for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 This s
2、pecification covers the general requirements for radio frequency, coaxial, air dielectric copper and aluminum transmission lines (hereafter referred to as lines) (see 6.1). 1.2 Part or Identifying Number (PIN). The PIN consists of the letter “M” followed by the specification number, the associated s
3、lash sheet number and the sequentially assigned dash number. M3890 /1 - 01 (Sequentially assigned dash number) (Applicable slash sheet number) (Specification number) 2. APPLICABLE DOCUMENTS 2.1 General. The documents listed in this section are specified in sections 3, 4 or 5 of this specification. T
4、his section does not include documents cited in other sections of this specification or recommended for additional information or as examples. While every effort has been made to ensure the completeness of this list, document users are cautioned that they must meet all specified requirements cited i
5、n sections 3, 4 or 5 of this specification, whether or not they are listed. 2.2 Government documents. 2.2.1 Specifications, standards, and handbooks. The following specifications, standards, and handbooks form a part of this document to the extent specified herein. Unless otherwise specified, the is
6、sues of these documents are those cited in the solicitation or contract. Comments, suggestions, or questions on this document should be addressed to: DLA Land and Maritime - VAI, P.O. Box 3990, Columbus OH 43218-3990 or email to RFconnectorsdscc.dla.mil Since contact information can change, you may
7、want to verify the currency of this address information using the ASSIST Online database at https:/assist.dla.mil. AMSC N/A FSC 5985 INCH-POUND Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-2 MIL-DTL-3890C DEPARTMENT OF DEFENSE SPECIFICATIONS MIL-D
8、TL-5541 - Chemical Conversion Coating on Aluminum and Aluminum Alloys DEPARTMENT OF DEFENSE STARDARDS MIL-STD-202 - Electronic and Electrical Component Parts MIL-STD-1285 - Marking of Electrical and Electronic Parts (Copies of these documents are available online at https:/assist.dla.mil/ or from th
9、e Standardization Documents Order Desk, 700 Robbins Avenue, Building 4D, Philadelphia, PA 19111-5094.) 2.3 Non-Government publications. The following documents form a part of this document to the extent specified herein. Unless otherwise specified, the issues of these documents are those cited in th
10、e solicitation or contract. ASTM INTERNATIONAL ASTM B188 - Copper Bus Pipe and Tube, Seamless ASTM B210 - Aluminum and Aluminum-Alloy Drawn Seamless Tubes ASTM B372 - Copper and Copper-Alloy Seamless Rectangular Waveguide Tube (Copies of these documents are available from http:/www.astm.org or ASTM
11、International, 100 Barr Harbor Dr., West Conshohocken, PA 19428-2959.) SAE INTERNATIONAL SAE-AMS-P-81728 - Plating, Tin-Lead (Electro-deposited) (Copies of these documents are available at http:/www.sae.org or SAE World Headquarters, 400 Commonwealth Drive, Warrendale, PA 15096-0001.) 2.4 Order of p
12、recedence. In the event of a conflict between the text of this document and the references cited herein (except for related specification sheets), the text of this document takes precedence. Nothing in this document, however, supersedes applicable laws and regulations unless a specific exemption has
13、 been obtained. 3. REQUIREMENTS 3.1 Specification sheets. The individual item requirements shall be as specified herein and in accordance with the applicable specification sheet. In the event of conflict between the requirements of this specification and the specification sheet, the latter shall gov
14、ern. 3.2 First article. When specified (see 6.2), a sample shall be subjected to first article inspection in accordance with 4.3. 3.3 Material. The material shall be as specified herein. However, when a definite material is not specified, a material shall be used which will enable the line to meet t
15、he performance requirements of this specification. Acceptance or approval of any constituent material shall not be construed as a guaranty of the acceptance of the finished product. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-3 MIL-DTL-3890C 3.3.
16、1 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
17、 life cycle costs. 3.3.1.1 Aluminum. Aluminum shall conform to 1100, temper H18 in accordance with SAE-AMS-WW-T-700/1 and shall be chemically treated inside and outside with class 3 chemical treatment in accordance with MIL-DTL-5541. 3.3.1.1.1 Aluminum alloy. Aluminum alloy shall conform to the chem
18、ical composition and tensile property requirements for 6061 or 6063 of ASTM B210. 3.3.1.2 Copper. Copper shall conform to type OF or DLP in accordance with ASTM B372 or ASTM B188. 3.3.1.2.1 Copper alloy. Copper alloy shall conform to commercial bronze, 90 percent, in accordance with ASTM B372. 3.4 D
19、esign and construction. Lines shall be of the design, construction, and overall physical dimensions specified (see 3.1). 3.4.1 Length. Unless otherwise specified (see 3.1), lines shall be furnished in 240-inch lengths. Lines ordered to specific or standard lengths shall conform to the tolerances in
20、table I. TABLE I. Length tolerances (applicable only to full length pieces). Length Tolerance, inch (all plus) Standard (20 ft) Specific Up to 20 ft Over 20 ft 0.5 0.25 0.75 3.4.2 Bow. The natural bow of the lines shall not depart from a straight line more than 0.5 inch (12.7mm) between any two poin
21、ts 10 feet apart on the external surface of the line. On lines less than 10 feet long, the allowable bow shall be .100 inch (2.54mm) between two points 2 feet apart. 3.4.3 Out-of-roundness. Unless otherwise specified (see 3.1), the outer and inner diameter of the conductors at any cross section shal
22、l not differ more than 1 percent from the specified diameter. 3.5 Attenuation. When lines are tested as specified in 4.5.2, the attenuation shall not exceed that specified (see 3.1). 3.6 Voltage standing wave ratio (VSWR). When lines are tested as specified in 4.5.3, the voltage standing wave ratio
23、shall not exceed the value specified (see 3.1). 3.7 Characteristic impedance. When lines are tested as specified in 4.5.4, the characteristic impedance value shall not exceed the value specified (see 3.1). 3.8 Velocity of propagation. When lines are tested as specified in 4.5.5, the velocity of prop
24、agation value shall not be less than that specified (see 3.1). Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-4 MIL-DTL-3890C 3.9 RF power handling capability (when specified, see 3.1). When tested as specified in 4.5.6, the lines shall meet the fol
25、lowing requirements after each test: Attenuation Shall be as specified (see 3.1). Voltage standing wave ratio Shall be as specified (see 3.1). 3.10 Dielectric withstanding voltage. When tested as specified in 4.5.7, the lines shall show no evidence of voltage breakdown. 3.11 Vibration, high frequenc
26、y. When tested as specified in 4.5.8, the lines shall meet the following requirements: Attenuation Shall be as specified (see 3.1). Voltage standing wave ratio Shall be as specified (see 3.1). 3.12 Pressurization (when specified, see 3.1). When lines are tested as specified in 4.5.9, there shall be
27、no loss of pressurization as indicated by bubbles. 3.13 Marking. Marking shall be in accordance with MIL-STD-1285 and shall be on each length of line at intervals of not more than 1.5 feet. The manufacturers name or trademark may also be marked on the lines provided such letters are not expressly fo
28、rbidden in the contact or order, and their height does not exceed 0.5 inch (12.7mm). 3.14 W orkmanship. Lines shall be processed in such a manner as to be uniform in quality and shall be free from pits, corrosion, cracks, rough edges, chips, burrs, scratches, flaws and other defects that will affect
29、 life, serviceability, or appearance. The ends shall be cut square. 4. VERIFICATION 4.1 Classification of inspections. The inspections specified herein are classified as follows: a. First article inspection (see 4.3). b. Conformance inspection (see 4.4). c. Materials inspection (see 4.2). 4.2 Materi
30、als inspection. Materials inspection shall consist of certification supported by verifying data that the materials listed in table II, used in fabricating the lines are in accordance with the applicable referenced specifications or requirements prior to such fabrication. TABLE II. Materials inspecti
31、on. Material Requirement paragraph Applicable specification or publication Aluminum Aluminum alloy Chemical treatment Copper Copper alloy 3.3.1.1 3.3.1.1.1 3.3.1 3.3.1.2 3.3.1.2.1 SAE-AMS-WW-T-700/1 ASTM B210 MIL-DTL-5541 ASTM B372 or ASTMB188 Provided by IHSNot for ResaleNo reproduction or networki
32、ng permitted without license from IHS-,-,-5 MIL-DTL-3890C 4.3 First article inspection. First article inspection shall be performed by the supplier, after award of contract and prior to production, at a location acceptable to the Government. First article inspection shall be performed on sample unit
33、s which have been produced with equipment and procedures normally used in production. First article approval is valid only on the contract or purchase order under which it is granted unless extended by the Government to other contracts or purchase orders. 4.3.1 Sample size. Four lengths of a given s
34、ize line shall be subjected to first article testing as follows: .375 inch (9.52mm) .875 inch (22.22mm) 1.625 inch (41.27mm) 3.125 inch (79.37mm) 6.125 inch (155.57mm) 4.3.2 Inspection routine. Sample units shall be subjected to first article inspection specified in table III in the order shown. All
35、 sample units shall be subjected to the inspection of group I. The sample units shall then be divided equally into two groups of two sample units each and subjected to the inspection for their particular group. 4.3.3 Failures. One or more failures shall be cause for refusal to grant first article ap
36、proval. 4.4 Conformance inspection. 4.4.1 Inspection of product for delivery. Inspection of product for delivery shall consist of groups A and B inspection. 4.4.1.1 Inspection lot. An inspection lot shall consist of all the lines of the same PIN, produced under essentially the same conditions and of
37、fered for inspection at one time. 4.4.1.2 Group A inspection. Group A inspection shall consist of the examinations and tests specified in table IV and shall be made on the same set of sample units, in the order shown. Provided by IHSNot for ResaleNo reproduction or networking permitted without licen
38、se from IHS-,-,-6 MIL-DTL-3890C TABLE III. First article inspection. Examination or test Requirement paragraph Method paragraph Group I (all sample units) Visual and mechanical examination Attenuation VSWR Characteristic impedance Velocity of propagation Group II (two sample units) RF power handling
39、 capability (when specified) Dielectric withstanding voltage Group III (two sample units) Vibration, high frequency Pressurization (when specified) 3.1, 3.3 thru 3.4 incl. 3.13 and 3.14 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 4.5.1 4.5.2 4.5.3 4.5.4 4.5.5 4.5.6 4.5.7 4.5.8 4.5.9 TABLE IV. Group A inspect
40、ion. Examination or test Requirement paragraph Method paragraph Visual and mechanical examination Attenuation VSWR Characteristic impedance Velocity of propagation 3.1, 3.3 thru 3.4 incl 3.13 and 3.14 3.5 3.6 3.7 3.8 4.5.1 4.5.2 4.5.3 4.5.4 4.5.5 4.4.1.2.1 Sampling plan. Table IV tests shall be perf
41、ormed on a production lot basis. Samples shall be selected in accordance with table V. If one or more defects are found, the lot shall be screened for that particular defect and defects removed. A new sample of parts shall be selected in accordance with table V and all group A tests again performed.
42、 If one or more defects are found in the second sample, the lot shall be rejected and shall not be supplied to this specification. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-7 MIL-DTL-3890C TABLE V. Inspection level. Lot size Visual and mechanic
43、al inspection 1 to 15 16 to 280 281 to 1,200 1,201 to 3,200 3,201 to 10,000 10,001 to 35,000 35,001 to 150,000 150,001 to 500,000 500,001 to over Amount produced 16 47 53 68 77 96 119 143 4.4.1.2.1.1 Rejected lots. If an inspection lot is rejected after group A and B inspection, the lot shall not be
44、 supplied to the contract order or purchase order. In cases where the defect(s) are minor in nature, such as smudged marking, the contractor may contact the qualifying activity for permission to screen the lot to remove defective parts or rework the lot. The qualifying activity shall be contacted fo
45、r guidance in such situations. Rejected lots shall be kept separate and shall not lose their identity. 4.4.1.3 Group B inspection. Group B inspection shall consist of the test specified in table VI and shall be made on sample units which have been subjected to and have passed the group A inspection.
46、 TABLE VI. Group B inspection. Test Requirement paragraph Method paragraph Dielectric withstanding voltage 3.10 4.5.7 4.4.1.3.1 Sampling plan. A sample of parts shall be randomly selected in accordance with table VII. If one or more defects are found, the lot shall be screened for that particular de
47、fect and defects removed. After screening and removal of defects, a new sample of parts shall be randomly selected and subjected to all tests in accordance with table VII. If one or more defects are found in the second sample, the lot shall be rejected and shall not be supplied to this specification
48、. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-8 MIL-DTL-3890C TABLE VII. Inspection level. Lot size Sample size 1 to 8 9 to 90 91 to 150 151 to 280 281 to 500 501 to 1,200 1,201 to 3,200 3,201 to 10,000 10,001 to 35,000 35,001 to over Amount prod
49、uced 5 11 13 16 19 23 29 35 40 4.4.1.3.2 Disposition of sample units. Sample units which have passed all the group B inspection may be delivered on the contract or purchase order, if the lot is accepted. 4.4.2 Test equipment and inspection facilities. Test equipment and inspections facilities shall be of sufficient accuracy, reliability, and quantity to permit performance of the requ
