1、 MS21381E 2 July 2007 SUPERSEDING MS21381D 8 May 1987 MILITARY SPECIFICATION SHEET COILS, RADIO FREQUENCY, MOLDED, VARIABLE, SUBMINIATURE, IRON CORE, MAGNETICALLY SHIELDED TYPES LT10V174 TO LT10V209 INCL. AND LT10V247 TO LT10SV258 INCL. This specification is approved for use by all Depart- ments and
2、 Agencies of the Department of Defense. The requirements for acquiring the products described herein shall consist of this specification and MIL-PRF-15305. NOTES: 1. Dimensions are in inches. 2. Metric equivalents are given for general information only. 3. These coils are intended to be mounted by t
3、he body. 4. Solderable/weldable lead wire, tinned copper, AWG number 24. FIGURE 1. Dimensions and configuration. AMSC N/A FSC 5950 INCH-POUND Inactive for new design. Inches mm .002 .010 .020 .030 .062 .200 .300 .375 .400 0.05 0.25 0.51 0.76 1.57 5.08 7.62 9.53 10.16 Provided by IHSNot for ResaleNo
4、reproduction or networking permitted without license from IHS-,-,-MS21381E 2 REQUIREMENTS: Design, construction, and physical dimensions: See figure 1. Style: LT10. Grade: 1. Class: A. Weight: 1.5 grams, maximum. Operating temperature range: -55C to +105C. Ambient temperature: 90C maximum. Temperatu
5、re rise: 15C maximum. Working voltage: 300 V dc. Percent coupling: 3 percent maximum. Terminal pull: 3 pounds minimum. Altitude: 70,000 feet. Tuning torque: .40 inch-ounce to 6 inch-ounce. Shock, specified pulse: Method 213 of MIL-STD-202, test condition I, is applicable. Dielectric withstanding vol
6、tage: At sea level: Method 301 of MIL-STD-202, test voltage 840 V rms for a minimum. At reduced barometric pressure: Method 105 of MIL-STD-202, test condition C, test voltage 630 V rms for a minimum of 60 seconds. Electrical characteristics: See table I and table II. Inductance: See table I. Q value
7、s: See table I. Self-resonant frequency (SRF): See table I. DC resistance (DCR): See table I. Part or Identifying Number (PIN): MS21381- (dash number from table I). Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MS21381E 3 TABLE I. Electrical charac
8、teristics (initial). 1/ Inductance tuning range (H) Dash number 2/ L Nom L Min L Max Test Frequency (L equal to or less than MIN. L and equal to or more than MAX. L. The variable shall then be set to the nominal inductance. The remaining applicable electrical characteristics shall be read without re
9、adjusting the unit. Allowable variation from initial inductance shall be the percent change between nominal inductance and the final inductance reading. The variable shall not be reset or adjusted between initial and final inductance tests. Provided by IHSNot for ResaleNo reproduction or networking
10、permitted without license from IHS-,-,-MS21381E 5 NOTE: Tolerance is .005 (0.13 mm). FIGURE 2. Test fixture for electrical measurements. Inches mm .063 .094 .187 .200 .219 .312 .625 .750 1.000 1.437 1.60 2.39 4.75 5.08 5.56 7.92 15.88 19.05 25.40 36.50 Provided by IHSNot for ResaleNo reproduction or
11、 networking permitted without license from IHS-,-,-MS21381E 6 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 and the Government assumes no liability whatsoe
12、ver 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 documents. In addition to MIL-PRF-15305, this do
13、cument references MIL-STD-202. Custodians: Preparing activity: Army CR DLA CC Navy EC Air Force 11 (Project 5950-2007-015) DLA - CC Review activities: Army MI Air Force 19 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-,-,-
