scope:

This specification is approved for use by all Departments and Agencies of the Department of Defense.

The complete requirements for procuring the crystal unit, quartz, described herein shall consist of this document and the latest issue of Military Specification MIL-C-3098.

Pertinent characteristics: 10 to 12 MHz; fundamental; controlled; antiresonance.

TABLE I. Requirements

Requirement Specified Value or Condition ---------------------------------------------------------------------------- Holder . . . . . . . . . . . . . . . . . . HC-25/U (MIL-H-10056/11) [A circled] Dimensions, marking and configuration. . . See Figure Frequency range. . . . . . . . . . . . . . 10 to 12 MHz, inclusive Capacitance, shunt . . . . . . . . . . . . 7.0 pf, maximum Mode of oscillation. . . . . . . . . . . . Fundamental Government reference standard test set . . TS-330/TSM Rated drive level. . . . . . . . . . . . . 2.5 ±0.5 mW Calibration values Equivalent resistance . . . . . . . . 11 ohms Crystal current. . . . . . . . . . . 15 ma Antiresonance, load capacitance. . . . . . 32.0 ±0.5 pf Reference temperature. . . . . . . . . . . 85° ±2°C Operating temperature range. . . . . . . . 80°C to 90°C, inclusive Frequency tolerance. . . . . . . . . . . ±0.002 percent Equivalent resistance. . . . . . . . . . 22 ohms, maximum Frequency stability. . . . . . . . . . . . ±0.0001 percent Operable temperature range . . . . . . . . −55°C to +80°C, inclusive Shock: Frequency change permitted. . . . . . . 4 hertz, maximum Equivalent resistance . . . . . . . . . ±10 percent Vibration:1/ Frequency change permitted. . . . . . . 4 hertz, maximum Equivalent resistance change permitted. ±10 percent Temperature cycling: Frequency. . . . . . . . . . . . . . . . Within ±0.002 percent of normal frequency Equivalent resistance. . . . . . . . . . Shall not exceed 22 ohms, maximum Aging: Frequoncy change permitted . . . . . . . 0.0005 percent 1/ Method 204 of MIL-STD-202, Test condition A.