1、AMSC N/A FSC 5985 MIL-DTL-28839B 20 May 2013 SUPERSEDING MIL-DTL-28839A 22 July 2003 DETAIL SPECIFICATION WAVEGUIDES, ELLIPTICAL GENERAL SPECIFICATION FOR This specification is approved for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specification cover
2、s the requirements for flexible and semi-rigid waveguides with elliptical inside configuration (see 6.1). 2. APPLICABLE DOCUMENTS 2.1 General. The documents listed in this section are specified in sections 3 and 4 of this specification. This section does not include documents cited in other sections
3、 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 of documents cited in sections 3 and 4 of this specification, whether
4、 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 issues of these documents are those, cited in the sol
5、icitation or contract (see 6.2). DEPARTMENT OF DEFENSE SPECIFICATIONS MIL-DTL-5541 - Chemical Conversion Coatings on Aluminum and Aluminum Alloys. MIL-DTL-28839/1 - Waveguides, Elliptical, Semi-rigid. DEPARTMENT OF DEFENSE STANDARDS MIL-STD-129 - Military Marking for Shipment and Storage. MIL-STD-20
6、2 - Electronic and Electrical Component Parts. MIL-STD-1285 - Marking of Electrical and Electronic Parts. Comments, suggestions or questions on this document should be addressed to DLA Land and Maritime, ATTN: VAT, Post Office Box 3990, Columbus, OH 43218-3990, or emailed to Tubesampsdla.mil. Since
7、contact information can change, you may want to verify the currency of this address information using the ASSIST Online database at https:/assist.dla.mil. THIS SPECIFICATION IS INACTIVE FOR NEW DESIGN AFTER 8 MAY 1998 INCH-POUND Provided by IHSNot for ResaleNo reproduction or networking permitted wi
8、thout license from IHS-,-,-MIL-DTL-28839B 2 (Copies of these documents are available online at https:/assist.dla.mil or from the Standardization Document Order Desk, 700 Robbins Avenue, Building 4D, Philadelphia, PA 19111-5094.) 2.3 Non-Government publications. The following documents form a part of
9、 this document to the extent specified herein. Unless otherwise specified, the issues of these documents are those cited in the solicitation or contract. AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) INTERNATIONAL ASTM-B241/B241M - Aluminum and Aluminum-Alloy, Seamless Pipe and Seamless Extruded
10、 Tube . ASTM-B152/B152M - Copper Sheet, Strip, Plate, and Rolled Bar. (Copies are available online at http:/www.astm.org or at ASTM International, P.O. Box C700, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959) 2.4 Order of precedence. Unless otherwise noted herein or in the contract, in the
11、 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 been obtained. 3
12、. 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 any conflict between the requirements of this specification and the specification sheet, the latter shall govern. 3.2 Firs
13、t article. When specified (see 6.2), the contractor shall furnish a sample unit for first article inspection and approval (see 4.4 and 6.3). 3.3 Materials. The material shall be as specified (see 3.1). Acceptance or approval of any constituent material shall not be construed as a guaranty of the fin
14、ished product. 3.3.1 Aluminum alloy. Aluminum alloys 1060, 1100, 6061, and 6063 shall conform to the chemical composition limits of ASTM-B241/B241M. The minimum resistivity shall be as follows: a. 1060, 28 micro ohms/centimeter. b. 1100, 2.90 micro ohms/centimeter. c. 6061, 4.0 micro ohms/centimeter
15、. d. 6063, 3.4 micro ohms/centimeter. 3.3.2 Copper. Copper type OF shall conform to ASTM-B152/B152M. 3.3.3 Jacket. Waveguide jacket material shall meet or exceed all requirements of this specification (see 6.6). 3.3.4 Pure tin. The use of pure tin as an underplate or final finish is prohibited both
16、internally and externally. Tin content of the waveguide components and solder shall not exceed 97 percent, by mass. Tin shall be alloyed with a minimum of 3 percent lead, by mass (see 6.7). 3.4 Design and construction. Waveguides shall be of the design, construction, and physical dimensions specifie
17、d (see 3.1). 3.4.1 Finish. The interior and exterior (except for jacketed waveguides) surfaces of the waveguide shall be bright, smooth, dry, and free of scales or oxide. All aluminum alloy waveguides shall be chemically treated in accordance with MIL-DTL-5541. Provided by IHSNot for ResaleNo reprod
18、uction or networking permitted without license from IHS-,-,-MIL-DTL-28839B 3 3.4.2 Length. The length of the finished waveguide shall be as specified (see 3.1). The waveguide length tolerance shall be in accordance with table I. TABLE I. Length tolerances. Waveguide length Tolerance (feet) 0-25 -0 +
19、1 inch 25 or greater 2 percent 3.5 Voltage standing wave ratio (VSWR). When waveguides are tested as specified in 4.6.2, the VSWR shall not exceed the value specified (see 3.1). 3.6 Attenuation. When waveguides are tested as specified in 4.6.3, the attenuation shall not exceed the value specified (s
20、ee 3.1). 3.7 Pressurization (flexible type only). When waveguides are tested as specified in 4.6.4, there shall be no leakage, no distortion of aperture due to pressure, and the pressure shall not have dropped more than 2 lbf/ft2. After the test, the VSWR shall be as specified in 3.5. 3.8 Bending ra
21、dius (flexible type only). When waveguides are tested as specified in 4.6.5, the bend shall be smooth and continuous without distortion of the cross-sectional aperture. After this test, the VSWR shall be as specified in 3.5. 3.9 Axial twist. When waveguides are tested as specified in 4.6.6, the twis
22、t shall be smooth and continuous without distortion of the cross-sectional aperture. After this test, the VSWR shall be as specified in 3.5. 3.10 Vibration, high frequency (flexible type only). When waveguides are tested as specified in 4.6.7, there shall be no mechanical damage to the jacket or the
23、 metal structure, as applicable. After this test, the VSWR and attenuation shall be as specified in 3.5 and 3.6, respectively. 3.11 Shock (specified pulse), (flexible type only). When waveguides are tested as specified in 4.6.8, there shall be no evidence of cracking or separation of the jacket, as
24、applicable. After this test, the VSWR and attenuation shall be as specified in 3.5 and 3.6, respectively. 3.12 Moisture resistance (flexible type only). When waveguides are tested as specified in 4.6.9, there shall be no evidence of cracking or separation of the jacket, as applicable. After this tes
25、t, the VSWR and attenuation shall be as specified in 3.5. and 3.6, respectively. 3.13 Thermal shock (flexible type only). When waveguides are tested as specified in 4.6.10, there shall be no evidence of damage to the jacket or metal structure. After this test, the VSWR and attenuation shall be as sp
26、ecified, in 3.5 and 3.6, respectively. 3.14 Power handling capability (when specified, see 3.1 and 6.2). When waveguides are tested as specified in 4.6.11, there shall be no evidence of mechanical damage to the metal structure or the jacket, as applicable. After this test, the VSWR shall be as speci
27、fied in 3.5. 3.15 Surface roughness. When waveguides are tested as specified in 4.6.12, the interior surface roughness shall not exceed the value specified (see 3.1). Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-28839B 4 3.16 Marking. The
28、waveguide shall be marked in accordance with method I of MIL-STD-1285, with the PIN and the manufacturers source code. The manufacturers name or trademark may also be marked on the waveguide, provided such letters are not expressly forbidden in the contract. The marking shall be applied with a perma
29、nent ink or paint along one side of the waveguide. Not more than 12-inch intervals shall be permitted from the end of one marking to the beginning of the next marking. 3.17 Recycled, recovered, or environmentally preferable materials. Recycled, recovered, or environmentally preferable materials shou
30、ld 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. 3.18 Workmanship. The waveguide shall be free from defects of a nature that may interfere with normal military
31、applications. The waveguide shall be uniform in composition, free from internal and external mechanical imperfections, and shall have a clean, bright appearance in accordance with good commercial practice. The interior surface of the waveguide shall be free from burrs, die marks, dirt, grease, scale
32、s, and splinters. 4. VERIFICATION 4.1 Classification of inspections. The inspections specified herein are classified as follows: a. Materials inspection (see 4.3). b. First article inspection (see 4.4). c. Conformance inspection (see 4.5). 4.2 Inspection conditions. Unless otherwise specified herein
33、, all inspections shall be performed in accordance with the test conditions specified in the “GENERAL REQUIREMENTS” of MIL-STD-202. 4.3 Materials inspection. Materials inspection shall consist of certification supported by verifying data that the materials listed in table II, used in fabricating the
34、 waveguide, are in accordance with the applicable referenced specifications or requirements prior to such fabrication. TABLE II. Materials inspection. Material Requirement paragraph Applicable specification Aluminum alloy 3.3.1 ASTM-B241/B241M Copper 3.3.2 ASTM-B152/B152M Jacket 3.3.3 (see 6.6) 4.4
35、First article inspection. First article inspection shall be performed by the contractor, after award of contract and prior to production, at a location acceptable to the Government. First article inspection shall be performed on a sample unit which has been produced with equipment and procedures nor
36、mally used in production. Unless extended by the Government to other contracts, first article approval is valid only on the contract under which it is granted. 4.4.1 Sample size. One waveguide shall be subjected to first article inspection. 4.4.2 Inspection routine. The sample shall be subjected to
37、the inspections specified in table III, in the order shown. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-28839B 5 TABLE III. First article inspection. Inspection Requirement paragraph Test method paragraph Visual and mechanical inspection
38、3.3 thru 3.4.2, 4.6.1 3.16, and 3.17 VSWR 3.5 4.6.2 Attenuation 3.6 4.6.3 Pressurization 1/ 3.7 4.6.4 Bending radius 3.8 4.6.5 Axial twist 3.9 4.6.6 Vibration, high frequency 1/ 3.10 4.6.7 Shock (specified pulse) 1/ 3.11 4.6.8 Moisture resistance 1/ 3.12 4.6.9 Thermal shock 1/ 3.13 4.6.10 Power hand
39、ling capability 2/ 3.14 4.6.11 Surface roughness 3.15 4.6.12 1/ Flexible type only. 2/ When specified (see 3.1 and 6.2). 4.4.3 Failures. One failure shall be cause for refusal to grant first article approval. 4.5 Conformance inspection. 4.5.1 Inspection of product for delivery. An inspection of prod
40、uct for delivery shall consist of groups A and B inspection. 4.5.1.1 Inspection lot. An inspection lot shall consist of all the waveguides of the same PIN, produced under essentially the same conditions, and offered for inspection at one time. 4.5.1.2 Group A inspection. Group A inspection shall con
41、sist of the inspections specified in table IV, in the order shown. TABLE IV. Group A inspection. Inspection Requirement paragraph Test method paragraph Visual and mechanical inspection 3.3 thru 3.4.2, 3.16, and 3.17 4.6.1 VSWR 3.5 4.6.2 Attenuation 3.6 4.6.3 Pressurization 1/ 3.7 4.6.4 1/ Flexible t
42、ype only. 4.5.1.2.1 Group A sampling plan. Statistical sampling and inspection shall be performed on an inspection lot basis with a random sample of waveguides selected in accordance with table V. Acceptance levels shall be based upon the zero defective sampling plan. No failures shall be permitted.
43、 TABLE V. Group A sampling plan. Lot size Sample size 1-13 100 percent 14-150 13 151-280 20 281-500 29 501-1,200 34 1,201-3,200 42 3,201-10,000 50 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-28839B 6 4.5.1.2.2 Rejected lots. If an inspect
44、ion lot is rejected, the contractor may rework it to correct the defects, or screen out the defective units, and resubmit for re-inspection. Resubmitted lots shall be inspected using tightened inspection. Such lots shall be separate from new lots, and shall be clearly identified as re-inspected lots
45、. 4.5.1.3 Group B inspection. Group B inspection shall consist of the inspections specified in table VI, in the order shown. The sample for group B inspection shall be selected from inspection lots that have passed the group A inspection. TABLE VI. Group B inspection. Inspection Requirement paragrap
46、h Test method paragraph Bending radius 3.8 4.6.5 Axial twist 3.9 4.6.6 Vibration 1/ 3.10 4.6.7 Shock (specified pulse) 1/ 3.11 4.6.8 Moisture resistance 1/ 3.12 4.6.9 Thermal shock 1/ 3.13 4.6.10 Power handling capability 2/ 3.14 4.6.11 1/ Flexible type only. 2/ When specified (see 3.1 and 6.2). 4.5
47、.1.3.1 Group B sampling plan. One length of the production lot shall be tested. If the size of the production lot is greater than 25 pieces, one additional length shall be tested per each 25 additional pieces in the lot. 4.5.1.3.2 Failures. If one or more sample units fail to pass group B inspection
48、, the lot shall be considered to have failed. 4.5.1.3.3 Disposition of sample units. Sample units which have been subjected to group B inspection shall not be delivered on the contract. 4.6 Methods of inspection. 4.6.1 Visual and mechanical inspection. Waveguides shall be examined to verify that the
49、 materials, design, construction, physical dimensions, finish, length, marking and workmanship are in accordance with the applicable requirements (see 3.3 thru 3.4.2, 3.16 and 3.17). Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-28839B 7 FIGURE 1. VSWR test setup (or equivalent). Provided by IHSNot for ResaleNo reproduction or networking
