1、 MS21367G 2 July 2007 SUPERSEDING MS21367F(USAF) 9 June 1976 MILITARY SPECIFICATION SHEET COILS, RADIO FREQUENCY, ENCAPSULATED, FIXED, MICRO-MINIATURE, SHIELDED (IRON CORE) TYPES LT10K354 TO LT10K383 INCL. This specification is approved for use by all Depart- ments and Agencies of the Department of
2、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. Coils are held rigidly by the body during vibration and mechanical shock t
3、esting. 4. The “G” dimension is not applicable within one-sixteenth of the body of the coil. FIGURE 1. Dimensions and configuration. AMSC N/A FSC 5950 INCH-POUND Dimensions in inches with metric equivalents (mm) in parentheses Ltr Minimum Maximum .090 (2.29) - .210 (5.33) .110 (2.79) .065 (1.65) - .
4、350 (8.89) REF .080 (2.03) .010 (0.25) .002 (0.05) .110 (2.79) .014 (0.36) .003 (0.08) A B C D E F G H .005 (0.13) NOM Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MS21367G 2 REQUIREMENTS: Design, construction, and physical dimensions: See figure
5、1. Style: LT10. Grade: 1. Class: A. Core material: Powdered iron. Lead material: Beryllium copper with an electro-tin plating .0001 to .0002 inch thickness composed of 60 percent tin minimum and 40 percent lead maximum. Weight: .03 gram, maximum. Operating temperature range: -55C to +105C. Ambient t
6、emperature: 90C maximum. Temperature rise: 15C maximum. Power dissipation: 20.5 mW, maximum. Maximum power is the wattage dissipated by the coil when rated dc current produces a 15C temperature rise at 90C ambient. Terminal pull: 227 grams minimum. Terminal bend: 2 operations minimum. Terminal twist
7、: Not applicable. 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 140 V rms minimum. At reduced barometric pressure: Method 105 of MIL-STD-202, test condi
8、tion C, test voltage 50 V rms minimum. Percent coupling: 3 percent maximum. Resistance to soldering heat: Method 210 of MIL-STD-202, test condition A, is applicable. Electrical characteristics: See table I, table II, and table III. Inductance: See table I. Q values: See table I. Self-resonant freque
9、ncy (SRF): See table I. DC resistance (DCR): See table I. Part or Identifying Number (PIN): MS21367 - (dash number from table I). Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MS21367G 3 TABLE I. Electrical characteristics (initial). Dash number 1/
10、 Type designation Nominal Inductance (H) Q (min) Test frequency (MHz) SRF min (MHz) DC resistance (ohms) at 25C (max) Rated dc current (mA) -1 LT10K354 .015 30% 40 50 250 .065 492 -2 LT10K355 .022 30% 40 50 250 .090 418 -3 LT10K356 .033 30% 40 50 250 .115 370 -4 LT10K357 .047 30% 40 50 250 .120 360
11、-5 LT10K358 .068 30% 40 50 250 .150 324 -6 LT10K359 .100 30% 40 50 250 .170 304 -7 LT10K360 .120 20% 35 25 250 .140 335 -8 LT10K361 .150 20% 40 25 250 .160 313 -9 LT10K362 .180 20% 40 25 250 .190 287 -10 LT10K363 .220 20% 40 25 250 .210 274 -11 LT10K364 .270 20% 40 25 250 .240 256 -12 LT10K365 .330
12、20% 40 25 250 .250 251 -13 LT10K366 .390 20% 40 25 200 .280 237 -14 LT10K367 .470 20% 40 25 175 .310 225 -15 LT10K368 .560 20% 40 25 170 .450 185 -16 LT10K369 .680 20% 40 25 165 .620 159 -17 LT10K370 .820 20% 35 25 160 .650 155 -18 LT10K371 1.00 20% 35 25 135 .730 145 -19 LT10K372 1.20 10% 35 7.9 12
13、0 1.00 125 -20 LT10K373 1.50 10% 32 7.9 110 1.20 114 -21 LT10K374 1.80 10% 32 7.9 95 1.50 102 -22 LT10K375 2.20 10% 35 7.9 80 1.70 96 -23 LT10K376 2.70 10% 35 7.9 70 2.00 89 -24 LT10K377 3.30 10% 37 7.9 65 2.20 84 -25 LT10K378 3.90 10% 37 7.9 60 2.80 75 -26 LT10K379 4.70 10% 40 7.9 55 3.10 71 -27 LT
14、10K380 5.60 10% 40 7.9 50 3.30 69 -28 LT10K381 6.80 10% 40 7.9 45 3.80 64 -29 LT10K382 8.20 10% 40 7.9 43 5.00 56 -30 LT10K383 10.0 10% 40 7.9 40 5.60 53 1/ The dash number added to MS military standard number constitutes the MS PIN; for example MS21367-1. Provided by IHSNot for ResaleNo reproductio
15、n or networking permitted without license from IHS-,-,-MS21367G 4 TABLE II. Electrical characteristics (final). (For .015 H through 1.0 H) 1/ Allowable variation from Initial measurement Allowable percent from specified minimum value in electrical characteristics (initial) table Inspection group Ind
16、uctance (percent) DC resistance Self-resonant frequency Q Qualification inspection Group II Group III Group IV 5 10 5 - (3% +.001 ohm) (2% +.001 ohm) - -10 -10 -10 -15 -10 Conformance inspection group C Subgroup I Subgroup II Subgroup III 5 5 10 - (2% +.001 ohm) (3% +.001 ohm) - -10 -10 -10 -10 -15
17、TABLE III. Electrical characteristics (final). (For 1.2 H through 10 H) 1/ Allowable variation from Initial measurement Allowable percent from specified minimum value in electrical characteristics (initial) table Inspection group Inductance (percent) DC resistance Self-resonant frequency Q Qualifica
18、tion inspection Group II Group III Group IV 2 5 2 - (3% +.001 ohm) (2% +.001 ohm) - -8 -10 -10 -10 -10 Conformance inspection group C Subgroup I Subgroup II Subgroup III 2 2 5 - (2% +.001 ohm) (3% +.001 ohm) - -10 -8 -10 -10 -10 1/ The test fixture in the diagram below or its equivalent shall be use
19、d for electrical measurements. Inductance values are effective inductance as indicated on a HP260A or equivalent, Q meter, when tested in the test fixture. Inductance of 10 H or less are corrected for residual meter and test fixture inductance which is typically .050 H. Provided by IHSNot for Resale
20、No reproduction or networking permitted without license from IHS-,-,-MS21367G 5 NOTES: 1. Polarization during moisture resistance test is not applicable. 2. The percent coupling between two radio frequency coils is to be determined by measuring the voltage induced in a coil when a voltage is applied
21、 to an adjacent coil. Percent coupling is not to be measured for parts with nominal inductances of less than 1.0 H. The measurement is to be performed at 10 kHz for nominal inductance values from 1.0 H through 100 H and at 1 kHz for nominal inductance values greater than 100 H. The measurement circu
22、it is shown in the figure below. Equipment for 1 kHz and 10 kHz consists of General Radio Audio Oscillator and Power Amplifier type 1308-A, or equivalent and Model 400 vacuum tube voltmeter, or equivalent. The coils to be tested shall be taped or otherwise secured such that the bodies of the coils a
23、re kept parallel and in contact with each other to insure maximum coupling as shown in the figure below. The voltage levels shall be as low as possible to permit reliable readings of V2. The inductance shall be measured with .02 volt injection voltage on a Hewlett-Packard model 260A Q-meter or equiv
24、alent. The percent coupling is to be calculated using the equation: Percent coupling = 21LLX 12VVX 100 where: L1= effective inductance of primary coil (measured at standard Q-meter test frequency) L2= effective inductance of secondary coil (measured at standard Q-meter test frequency) V1= voltage me
25、asured across primary V2= voltage measured across secondary 3. For dielectric withstanding voltage, barometric pressure and insulation resistance units shall be placed on flat metal plate with leads insulated from surface. Measurement of dielectric withstanding voltage, barometric pressure and insul
26、ation resistance shall be between the leads of the coil connected together and the metal plate. 4. The marking shall be as specified in MIL-PRF-15305 except that the marking shall be on the unit package or container. FIGURE 1. Typical coil test fixture. Provided by IHSNot for ResaleNo reproduction o
27、r networking permitted without license from IHS-,-,-MS21367G 6 FIGURE 1. Typical coil test fixture - Continued. 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 on
28、ly 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. Reference
29、d documents. In addition to MIL-PRF-15305, this document references MIL-STD-202. Custodians: Preparing activity: Air Force 11 DLA CC DLA - CC (Project 5950-2007-013) 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-,-,-
