1、AMSC N/A FSC 5985 MIL-DTL-3933K 12 April 2011 SUPERSEDING MIL-DTL-3933J 25 July 2008 DETAIL SPECIFICATION ATTENUATORS, FIXED, SPACE LEVEL, NON-SPACE LEVEL GENERAL SPECIFICATION FOR This specification is approved for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope
2、. This specification covers the general requirements for radio and microwave frequency fixed attenuators, including chip, coaxial, leaded, and relay header attenuators (see 6.1). This specification provides three device level designators; a space level (T) part number is intended for space applicati
3、on, (S) screened and (N) non-screened part numbering are intended for all other applications (see 1.4). 1.2 Classification. Attenuators are of the following classes, specified in 6.2 and appendix B, table B-I though B-IV: Classification system categorizes attenuators having the same functional use b
4、ut different requirements for performance. Class I - For performance characteristic, see appendix B table B-I. Class II - For performance characteristic, see appendix B table B-II. Class III - For performance characteristic, see appendix B table B-III. Class IV - For performance characteristic, see
5、appendix B table B-IV. 1.3 Device substitutions. A device of higher classification type may be substituted for the same basic device of a lower classification type. Classification types, in descending order, are as follows: class I, class II, class III, and class IV. A device of higher designator le
6、vel may be substituted for the same basic PIN devices of a lower designator level. Designator level, in descending order, are as follows: “T”, “S” and “N”. Any part(s) being used for substitution with procuring activity approval may retain its original marking, or the PIN may be remarked. Lot record
7、s should maintain traceability of any remarking. 1.4 Part or Identifying Number (PIN). The military PIN consists of the letter “M” followed by the basic number of the specification sheet, an assigned dash (see 3.1), and the letter N, S or T; where N indicates non-screened, S indicates screened items
8、 and T indicates space level. PINs without N, S, or T are considered non-screened items. M 3933/14- 01 N S or T Military designator and Dash number Non-screened Screened Space level specification sheet number designated INCH-POUND Comments, suggestions, or questions on this document should be addres
9、sed to DLA Land and Maritime, ATTN: VAT, P.O. Box 3990, Columbus, OH 43218-3990 or e-mailed to TubesAmpsdla.mil. Since contact information can change, you may want to verify the currency of address information using the ASSIST Online database at https:/assist.daps.dla.mil. Provided by IHSNot for Res
10、aleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-3933K 2 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 of this specifica
11、tion 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 or not they are l
12、isted. 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 solicitation or contra
13、ct (see 6.2). DEPARTMENT OF DEFENSE SPECIFICATIONS MIL-DTL-3890 - Lines, Radio Frequency Transmission (Coaxial, Air Dielectric) General Specification For. MIL-H-28719 - Header, Hermetically Sealed. MIL-PRF-39012 - Connectors, Coaxial, Radio Frequency, General Specification For. MIL-DTL-55302 - Conne
14、ctors, Printed Circuit Subassembly and Accessories. MIL-DTL-45204 - Gold Plating, Electrodeposited. (See supplement 1 for list of associated specification sheets.) DEPARTMENT OF DEFENSE STANDARDS MIL-STD-130 - Identification Marking of US Military Property. MIL-STD-202 - Electronic and Electrical Co
15、mponent Parts. MIL-STD-790 - Established Reliability and High Reliability Qualified Products List (QPL) Systems for Electrical, Electronic, and Fiber Optic Parts Specifications. MIL-STD-883 - Test Method Standard, Microcircuits. MIL-STD-889 - Dissimilar Metals. MIL-STD-1276 - Leads for Electronic Co
16、mponent Parts. (Copies of these documents are available online at https:/assist.daps.dla.mil or from Standardization Document Order Desk, 700 Robbins Avenue, Building 4D, Philadelphia, PA 19111-5094.) 2.2.2 Other Government documents, drawing, and publications. The following other Government documen
17、ts, drawings, and publications form a part of this document to the extent specified herein. Unless otherwise specified, the issues of these documents are those cited in the solicitation or contract. NATIONAL AERONAUTICS AND SPACE ADMINISTRATION (NASA) NASA 1124 - Outgassing Data for Selecting Spacec
18、raft Materials. (Hard copies of this document are no longer available from the NASA Goddard Materials Branch or the Document Automation and Production Service Detachment Office (DAPS). This information is only available at http:/outgassing.nasa.gov.) 2.3 Non-Government publications. The following do
19、cuments form a part of this document to the extent specified herein. Unless otherwise specified, the issues of these documents are those cited in the solicitation or contract (see 6.2). Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-3933K 3
20、NATIONAL CONFERENCE OF STANDARDS LABORATORIES (NCSL) NCSL-Z540.3 - Calibration Laboratories and Measuring and Test Equipment. (Copies are available online at http:/www.ncsli.org or from National Conference of Standards Laboratories NCSL, 2995 Wilderness Place Suite 107, Boulder, Colorado 80301-5405.
21、) ASTM INTERNATIONAL ASTM-A582/A582M - Free-Machining Stainless Steel Bars. ASTM-B16/B16M - Free Cutting Brass Rod, Bar and Shapes, For Use in Screw Machines. ASTM-B36/B36M - Brass Plate, Sheet, Strip, and Rolled Bar. ASTM-B121/B121M - Leaded Brass Plate, Sheet, Strip, and Rolled Bar. ASTM-B124/B124
22、M - Copper and Copper Alloy Forging Rod, Bar, and Shapes. ASTM-B194 - Copper-Beryllium Alloy Plate, Sheet, Strip, and Rolled Bar. ASTM-B196/B196M - Copper-Beryllium Alloy Rod and Bar. ASTM-B197/B197M - Copper-Beryllium Alloy Wire. ASTM-B488 - Electrodeposited Coating of Gold for Engineering uses. AS
23、TM-B700 - Electrodeposited Coatings of Silver for Engineering. ASTM-E595 - Total Mass Loss and Collected Volatile Condensable Materials from Outgassing in a Vacuum Environment . (Copies are available online at http:/www.astm.org or from ASTM International, 100 Barr Harbor Drive, West Conshohocken, P
24、A 19428-2959.) ELECTRONIC INDUSTRIES ALLIANCE (EIA) EIA557 - Statistical Process Control Systems. (Copies are available online at http:/www.eia.org or from Electronic Industries Alliance, Corporate Engineering Department, 2500 Wilson Boulevard, Arlington, VA 22201.) INSTITUTE OF ELECTRICAL AND ELECT
25、RONICS ENGINEERS (IEEE) IEEE287 - IEEE Standard for Precision Coaxial Connectors. (Copies are available online at http:/www.ieee.org or from IEEE Service Center, 445 Hoes Lane, P. O. Box 1331, Piscataway, NJ 08855-1331.) INTERNATIONAL ORGANIZATION FOR STANDARDIZATION (ISO) ISO10012 - Measurement Man
26、agement Systems - Requirements for Measurement Processes and Measuring Equipment. (Copies are available online at http:/iso.org or http:/www.iso.org/iso/home.htm or from American National Standards Institute, 13thFloor, 11 West 42ndStreet, New York, NY 10036-0350.) Provided by IHSNot for ResaleNo re
27、production or networking permitted without license from IHS-,-,-MIL-DTL-3933K 4 SAE INTERNATIONAL (SAE) SAE-AMS2422 - Plating, Gold.SAE-AMS4375 - Sheet and Plate, Magnesium Alloy (3.0 Al - 1.0 Zn - 0.20 Mn) (AZ31B-0) Annealed and Re-crystallized. SAE-AMS4376 - Plate, Magnesium Alloy (3.0 Al - 1.0 Zn
28、 - 0.20 Mn (AZ31B-H26), Cold Rolled and Partially Annealed. SAE-AMS4377 - Sheet and Plate, Magnesium Alloy (3.0 Al - 1.0 Zn - 0.20 Mn) (AZ31B-H24), Cold Rolled, Partially Annealed. SAE-AMS2404 - Nickel, Electroless, Plating.SAE-AMS QQ-N-29 - Nickel Plating (Electrodeposited).(Copies are available on
29、line at http:/www.sae.org. or from SAE International, 400 Commonwealth Drive, Warrendale, PA 15096-0001.) 2.4 Order of precedence. Unless otherwise noted herein or in the contract, in the event of a conflict between the text of this document and the references cited herein (except for related specif
30、ication 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. REQUIREMENTS 3.1 Specification sheets. The individual item requirements shall be as specified herein and in acc
31、ordance with the applicable specification sheets. In the event of any conflict between requirements of this specification and the specification sheet, the latter shall govern. 3.2 Qualification. Attenuators furnished under this specification shall be products qualified for listing on the applicable
32、qualified products list at the time set for opening of bids (see 4.5, 6.3 and appendix C). 3.2.1 Qualified Product List (QPL) system. The manufacturer shall establish and maintain a QPL system for parts covered by this specification. Requirements for this system are specified in MIL-STD-790 (all pro
33、duct levels, see 4.1). In addition, the manufacturer shall either establish a Statistical Process Control (SPC) system that meets requirements of 3.2.2 below, or employ Statistical Quality Control (SQC) techniques as described in 3.2.3 below. 3.2.2 SPC system. As part of the overall MIL-STD-790 QPL
34、system, the manufacturer shall establish a SPC system that meets the requirements of EIA557 (see 4.1). 3.2.3 SQC techniques. As an alternative to establishing an SPC system, the manufacturer may, with qualifying activity approval (see 6.3), employ various SQC techniques (such as trend charts, Pareto
35、 charts, run charts, check charts, histograms, and flow charts). 3.3 Material. The material shall be as specified herein and in the applicable specification sheets. When a definite material is not specified, a material shall be used which will enable the attenuator to meet the performance requiremen
36、ts of this specification. Acceptance or approval of any constituent material shall not be construed as a guaranty of the acceptance of the finished product. In addition, for space level only, materials used in the manufacturing of the attenuator shall meet the outgassing requirement (see 3.3.8). 3.3
37、.1 Brass. Brass shall conform to ASTM-B16/B16M, ASTM-B36/B36M, ASTM-B121/B121M, or ASTM-B124/B124M. 3.3.2 Copper alloy. Copper alloy used in the fabrication of coaxial-type attenuators shall conform to the material requirements specified in MIL-DTL-3890. Provided by IHSNot for ResaleNo reproduction
38、or networking permitted without license from IHS-,-,-MIL-DTL-3933K 5 3.3.3 Copper-beryllium. When specified, copper-beryllium alloy shall conform to ASTM-B194, ASTM-B196/B196M, or ASTM-B197/B197M. 3.3.4 Magnesium alloy. Magnesium alloy shall be composition AZ31B, condition H24, conforming to SAE-AMS
39、4375, SAE-AMS4376, and SAE-AMS4377. When specified (see 3.1 and 6.2), magnesium attenuators shall be supplied. Magnesium shall not be used for space application unless coated with an approved finish to prevent corrosion. Maximum sustained tensile stresses for magnesium shall be limited to less than
40、50 percent of yield strength. 3.3.5 Dissimilar metals. Unless suitably protected against electrolytic corrosion, dissimilar metals (see MIL-STD-889) shall not be used in intimate contact with each other. Dissimilar metals are defined as metal specimens that are in contact or otherwise electrically c
41、onnected to each other in a conductive solution that generate an electric current. 3.3.6 Pure tin. The use of pure tin, as an underplate or final finish, is prohibited both internally and externally. Tin content of radio and microwave frequency fixed attenuator components and of solder shall not exc
42、eed 97 percent, by mass. Tin shall be alloyed with a minimum 3 percent lead, by mass (see 6.7). 3.3.7 Gold plating (space level only). Connector center contacts shall meet the requirements in 3.4.3.2 herein. All other copper, copper beryllium, or brass surfaces shall be gold plated to a minimum gold
43、 thickness of 50 micro inches in accordance with MIL-DTL-45204, Type II Grade C over 100 micro inches minimum of electrodeposited nickel in accordance with SAE-AMS QQ-N-290 or over 100 micro inches minimum of electroless nickel in accordance with SAE-AMS2404. Electroless nickel shall not be used on
44、any components that are required to flex. A baking test accordance with MIL-DTL-45204 shall be performed on 2 percent or two samples from each plating lot, whichever is greater. For applications where the component is required to flex, in addition to the baking test, a bend test in accordance with M
45、IL-DTL-45204 shall be performed on 2 percent or two samples from each plating lot, whichever is greater. A cutting test in accordance with MIL-DTL-45204 may be substituted when the bend test is not feasible. 3.3.8 Outgassing (space level only). When examined as specified in 4.7.16, the number of sam
46、ples (see Table II or Table V) shall meet the following requirements: a. Total Mass Loss (TML) shall not exceed 1 percent. b. Volatile Condensable Material (VCM) shall not exceed 0.1 percent. 3.3.8.1 Outgassing test data (see 2.2.2). Data listed in NASA Publication 1124 may be used in lieu of actual
47、 test data for applicable materials. The material shall be assessed prior to use. The actual material shall be exactly the same manufacturers, constituent material, manufacturing processes/procedures, and manufacturing equipment/plants, as the one that is listed. 3.4 Design and construction. Attenua
48、tors shall be of the design, construction, and physical dimensions specified (see 3.1). Attenuators shall be of the lightest practicable weight consistent with the strength required for sturdiness, safety, and reliability. 3.4.1 Operating frequency range. The frequency range shall be as specified (s
49、ee 3.1). 3.4.2 Nominal impedance. The nominal impedance for attenuators shall be as specified (see 3.1). Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-3933K 6 3.4.3 Connectors. 3.4.3.1 Connector bodies. Unless otherwise specified (see 3.1) the connector material shall conform to
