1、 MS14047A 29 June 2007 SUPERSEDING MS14047 15 February 1972 MILITARY SPECIFICATION SHEET COILS, RADIO FREQUENCY, MOLDED, FIXED, SUBMINIATURE, (IRON CORE), TYPES LT10K138 TO LT10K142 INCL. This specification is approved for use by all Depart- ments and Agencies of the Department of Defense. The requi
2、rements for acquiring the products described herein shall consist of this specification and MIL-PRF-15305. Dimensions in inches with metric equivalents (mm) in parentheses Ltr Minimum Maximum A B C D .240 (6.10) .550 (13.97) 1.250 (31.75) .023 (0.58) .260 (6.60) .570 (14.48) 1.625 (41.28) .027 (0.69
3、) NOTES: 1. Dimensions are in inches. 2. Metric equivalents, in parentheses, are given for general information only. 3. These coils are intended to be mounted by the body. 4. Solderable/weldable lead wire, AWG number 22. FIGURE 1. Dimensions and configuration. AMSC N/A FSC 5950 INCH-POUND Inactive f
4、or new design.Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MS14047A 2 REQUIREMENTS: Design, construction, and physical dimensions: See figure 1. Style: LT10. Grade: 1. Class: A. Weight: 2.0 grams, maximum. Operating temperature range: -55C to +105
5、C. Ambient temperature: 90C maximum. Temperature rise: 15C maximum. Terminal pull: 5 pounds minimum. Altitude: 70,000 feet. Shock, specified pulse: Method 213 of MIL-STD-202, test condition I, is applicable. Dielectric withstanding voltage: At sea level: Method 301 of MIL-STD-202, test voltage 1,000
6、 V rms for a minimum of 60 seconds. At reduced barometric pressure: Method 105 of MIL-STD-202, test condition C, test voltage 200 V rms for a minimum of 60 seconds. Electrical characteristics: See table I and table II. Inductance: See table I. Q values: See table I. Self-resonant frequency (SRF): Se
7、e table I. DC resistance (DCR): See table I. Part or Identifying Number (PIN): MS14047- (dash number from table I). Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MS14047A 3 TABLE I. Electrical characteristics (initial). Dash number 1/ Type designat
8、ion 2/ Superseded MS PIN Inductance (H) 10% Q (min) Test frequency (MHz) SRF min (MHz) DC resistance (ohms) Rated dc current (mA) -1 LT10K138 MS75052-3 68 70 2.5 13.0 3.3 168 -2 LT10K139 MS75052-4 82 65 2.5 11.7 3.5 162 -3 LT10K140 MS75052-5 100 65 2.5 10.7 3.8 155 -4 LT10K141 MS75052-6 120 75 .79 9
9、3 4.7 142 -5 LT10K142 MS75052-7 150 75 .79 8.3 5.3 132 1/ The dash number added to MS military standard number constitutes the MS PIN; for example MS14047-1. 2/ The decrease in maximum operating temperature from 125C to 105C does not downgrade these coils but assures satisfactory operation at 105C
10、for a minimum of 2,000 hours of life rather than a shorter period of operation at 125C. TABLE II. Electrical characteristics (final). 1/ Allowable variation from Initial measurement Allowable percent from specified minimum value in electrical characteristics (initial) table Inspection group Inductan
11、ce (percent) DC resistance Self-resonant frequency Q Qualification inspection Group II Group III Group IV 2/ 2 5 5 - (3% +.001 ohm) (2% +.001 ohm) - -8 -10 -10 -10 -15 Conformance inspection group C Subgroup I Subgroup II 2/ Subgroup III 2 5 5 - (2% +.001 ohm) (3% +.001 ohm) - -10 -8 -10 -15 -10 1/
12、Test fixture allowance of +.01 H shall be added to all change in inductance limits ( _ percent +.01 H). 2/ The polarizing voltage during the moisture resistance tests Is applied with the positive lead connected to the coil terminals tied together, and the negative lead connected to the metal strap.
13、Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MS14047A 4 Changes from previous issue. The margins of this specification are marked with vertical lines to indicate where changes from the previous issue were made. This was done as a convenience only
14、and the Government assumes no liability whatsoever for any inaccuracies in these notations. Bidders and contractors are cautioned to evaluate the requirements of this document based on the entire content irrespective of the marginal notations and relationship to the last previous issue. Referenced d
15、ocuments. In addition to MIL-PRF-15305, this document references MIL-STD-202. Custodians: Preparing activity: Army CR DLA CC Navy EC Air Force 11 (Project 5950-2007-005) DLA - CC Review activities: Army - AR, MI Navy OS Air Force - 99 NOTE: The activities listed above were interested in this documen
16、t 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-,-,-
