1、AMSC N/A FSC 5950 INCH-POUND MIL-T-27/3B 23 September 2009 SUPERSEDING MIL-T-27/3A 6 December 1976 MILITARY SPECIFICATION SHEET TRANSFORMER, AUDIO FREQUENCY This specification is approved for use by all Depart- ments and Agencies of the Department of Defense. The requirements for acquiring the trans
2、former described herein shall consist of this specification sheet and MIL-PRF-27. NOTES: 1. Dimensions are in inches. 2. Metric equivalents are given for general information only. 3. Unless otherwise specified, tolerance on overall case dimensions is +.000 (0.00 mm) -.063 (-1.60 mm). 4. Tolerance on
3、 mounting dimensions is +.016 inch (0.41 mm). 5. Inserts not recommended for new design. 6. Terminal arrangement optional within mounting area indicated. FIGURE 1. Dimensions and configurations. Inches mm .125 3.18 .138 3.51 .219 5.56 .375 9.53 1.125 28.58 1.188 30.18 1.625 41.28 2.375 60.33 CIRCUIT
4、 DIARAM -8 dBm, minimum. Working voltage (1-3) - 175 V, maximum. (4-6) - 175 V, maximum. (7-9) - 175 V, maximum. Primary current: .020 ampere dc through terminal 2; .001 ampere dc, maximum unbalance. Primary impedance (1-3): 10,000 ohms ct. Design and construction: Dimensions and configuration: See
5、figure 1. Duty cycle: Continuous. Case: Metal encased. Material: Steel. Terminals: Solder terminals, No 20 AWG. Height: .312 inch, +.000, -.156 (7.92 mm +0.00 -3.96). Weight: .72 pound, maximum. Terminal strength: MIL-STD-202, method 211, test condition A, 5.0 pounds. Operating temperature: 105C, ma
6、ximum. Dielectric withstanding voltage: MIL-STD-202, method 301; test voltage at sea level, 500 V rms. At reduced barometric pressure, 300 V rms. Electrical characteristics: Harmonic distortion: Not more than 1 percent with 20 V, 300 Hz across (1-3) and .020 ampere dc through terminal 2. No load (ce
7、ntertap voltage unbalance only): With 20 volts, 1,000 hertz across (1-3) and .020 dc through terminal 2: Unbalance (4-5) and (5-6): 1 percent, maximum. Unbalance (7-8) and (8-9): 1 percent, maximum. Unbalance (4-6) and (7-9): 1 percent, maximum. Unbalance (1-2) and (2-3): 1 percent, maximum. Seconda
8、ry load impedance: (4-6) 22,500 ohms ct. (7-9) 22,500 ohms ct 10 percent. (4-9) 90,000 ohms ct. Primary impedance (1-3): With approximately 1 V, 1,000 Hz across (1-3) and .020 ampere dc through terminal 2, and 90,000 ohms ct across (4-9), the primary impedance shall be 10,000 ohms ct 10 percent acro
9、ss (1-3). Frequency response: Range 300 to 10,000 Hz at rated power, flat within 2 dB; reference frequency = 1,000 Hz; test voltage 1 Vrms (1-3). Insertion loss: 1.0 dB maximum, with 20 V, input at 1,000 Hz across (1-3). Resonance: Second resonant frequency = 20,000 Hz, minimum. Provided by IHSNot f
10、or ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-T-27/3B 3 Polarity: Additive, with terminals 3 and 4, and 6 and 7 connected. Temperature rise: 40C maximum, above an ambient of 65C, with rated power at 300 Hz. Vibration (High frequency): MIL-STD-202, method 204, test
11、 condition B. Shock (specified pulse): MIL-STD-202, method 213, test condition I. Part or Identifying Number (PIN): M 27/3-01 A or B MIL specification Specification Dash Stud mounting Insert mounting item sheet no. no. (For cross reference of MS PIN to military PIN, see table I.) TABLE I. Cross refe
12、rence. Mounting MS9000 M27/3 Dash no. Type designation Dash no. Type designation Studs -A TF4RX13AJ001 -01A TF4R21AJ Inserts -B TF4RX13AJ001 -01B TF4R21AJ NOTE: Qualification approval to MIL-T-27/3 shall be sufficient to grant qualification approval to MIL-T-27/4 through MIL-T-27/6. Changes from pre
13、vious 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 cauti
14、oned 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-27, this document references the following: MIL-STD-202. Custodians: Preparing activity: Arm
15、y - CR DLA - CC Navy - EC Air Force - 85 (Project 5950-2009-015) DLA CC Review activities: Army AR, CR4 Navy AS, MC Air Force 19, 99 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-,-,-
