MIL-C-3098 Revision G, October 20, 1979
CRYSTAL UNITS, QUARTZ
Includes all amendments and changes through Cancellation Notice 3, January 10, 1997
Additional Comments: CNCL S/S BY MIL-PRF-3098
This specification covers the general requirements for quartz crystal units, (see 6.5.1), designed for frequency control of Armed Services electronic equipment (see 6.1).
The type designation applies only to crystal units meeting all requirements of the specification. The type designation shall be in the following form, and as specified (see 3.1, 3.21, and 6.2):
Crystal units are identified by the two-letter symbol "CR."
The number identifies a type of crystal unit which has been designed with certain electrical and physical characteristics, covered by a single specification sheet. The number comprises one or more digits, or one or more digits followed by a letter, and is preceded by a hyphen; the letter indicates a modification of the basic type, e.g., 15B.
The basic application for which a crystal unit has been designed is indicated by the symbol "/U" denoting "general utility."
This appendix details the procedure to submit samples with related data for qualification of crystal units covered by this specification.