1、AMSC N/A FSC 5950 INCH-POUND MIL-T-27/9B 9 November 2009 SUPERSEDING MIL-T-27/9A 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 transfo
2、rmer 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 moun
3、ting dimensions is +.016 (0.41 mm). 5. Inserts not recommended for new design. 6. Terminal arrangement optional within mounting area indicated. FIGURE 1. Dimensions and configurations. .020 AMP DC THROUGH TERMINAL 2 1 MAX ALTITUDE: 50,000 FT.3 67CIRCUIT DIAGRAM AND MARKING1.1881.188 +.000- .1251.188
4、 1.625 SQ. .219 .219 1.188 1.125 DIA (MAX) TERMINAL MTG. AREA CIRCUIT DIAGRAM .1 W, minimum. Working voltage: (1-3): 525 V, maximum. (4-5): 175 V, maximum. (6-7): 175 V, maximum. Primary current: .020 ampere dc through terminal 2, .001 ampere dc, maximum unbalance. Primary impedance (1-3): 15,000 oh
5、ms ct. Design and construction: Dimensions and configuration: See figure 1. Duty cycle: Continuous. Case: Metal encased. Material: Steel. Terminals: Solder terminals, No. 18 AWG. Height: .375 (9.53 mm) +.000 -.188 (4.78 mm). Weight: .72 pound, maximum. Operating temperature range: -55C to +105C. Alt
6、itude: 50,000 feet, maximum. Life expectancy: 10,000 hours, minimum. Terminal strength: MIL-STD-202, method 211, test condition A, 5.0 pounds. Dielectric withstanding voltage: MIL-STD-202, method 301 At sea level: 1,500 V rms. At reduced barometric pressure: 500 V rms. Electrical characteristics: Ha
7、rmonic distortion: Not more than 1 percent with 173 V, 300 Hz across (1-3) and .020 ampere dc through terminal 2. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-T-27/9B 3 No load (center-tap voltage unbalance only): With 173 V, 1,000 Hz across (
8、1-3) and .020 ampere dc through terminal 2: Unbalance (4-5) and (6-7): 1 percent, maximum. Unbalance (1-2) and (2-3): 1 percent, maximum. Secondary load impedance: (4-5) 150 ohms. (6-7) 150 ohms 10 percent. (4-7) 600 ohms ct. Primary impedance: With approximately 30 V, 1,000 Hz across (1-3) and .020
9、 ampere dc though terminal 2 and 600 ohms ct across (4-7), the primary impedance shall be 15,000 ohms ct 10 percent across (1-3). Frequency response: Range: 300 to 10,000 Hz at rated power, flat within 2 dB, reference frequency = 1,000 Hz; test voltage 30 V rms (1-3). Insertion loss: 1.5 dB maximum,
10、 with 173 V, input at 1,000 Hz across (1-3). Resonance: Second resonant frequency = 20,000 Hz, minimum. Polarity: Additive with terminals 3 and 4, and 5 and 6 connected. Temperature rise: 20C maximum, above an ambient of 85C, with rated power at 300 Hz. Vibration (high frequency): MIL-STD-202, metho
11、d 204, test condition B. Shock (specified pulse): MIL-STD-202, method 213, test condition I. Part or Identification Number (PIN): M27/9-01A or -01B. TABLE I. Cross reference. Mounting MS90006B M27/9 Dash no. Dash no. Studs -A -01A Inserts -B -01B NOTE: Qualification approval to MIL-T-27/9 shall be s
12、ufficient to grant qualification approval to MIL-T-27/3 through MIL-T-27/8. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-T-27/9B 4 Changes from previous issue. The margins of this specification are marked with vertical lines to indicate where
13、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 t
14、he 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: Army - CR DLA - CC Navy - EC Air Force - 85 (Project 5950-2009-008) DLA - CC Review activities: Army
15、 - 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-,-,-
