MS21381E-2007 COILS, RADIO FREQUENCY, MOLDED, VARIABLE....pdf

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 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 the 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 Source: http:/ - Downloaded: 2008-06-06T06:29Z Check the source to verify that this is the current version before use. 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. Temperature 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 voltage: 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 values: 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). Source: http:/ - Downloaded: 2008-06-06T06:29Z Check the source to verify that this is the current version before use. MS21381E 3 TABLE I. Electrical characteristics (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 readjusting 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. Source: http:/ - Downloaded: 2008-06-06T06:29Z Check the source to verify that this is the current version before use. 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 Source: http:/ - Downloaded: 2008-06-06T06:29Z Check the source to verify that this is the current version before use. 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 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 documents. 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 5950-2007-015) 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. Source: http:/ - Downloaded: 2008-06-06T06:29Z Check the source to verify that this is the current version before use.