Accession Number:

AD0262694

Title:

QUARTZ CRYSTAL CONTROLLED OSCILLATORS

Descriptive Note:

Corporate Author:

BELL TELEPHONE LABS INC NORTH ANDOVER MA

Personal Author(s):

Report Date:

1961-07-10

Pagination or Media Count:

1.0

Abstract:

The results of acceleration, thermal shock nd aging tests on the 5-mc ruggedized version of the GA-10752 crystal unit are given. The units will now meet the stability required of them under vibration, shock, acceleration and aging. The ceramic-metal package has been found to be more gassy than glass bulbs, but improved cleaning techniques should remedy this. Several new aging facilities were finished which will allow the simultaneous aging of up to 16 crystal units with a precision of a few parts in 10 to the 10th power per day. The measurement of aging rates of this order is possible through the use of double ovens, improved voltage sensitivity in the oscillator circuits and an Atomicron as a primary frequency standard. Aging results on a few precision crystal units are given. A preliminary design of a ruggedized, miniature frequency standard is presented. The units will occupy approximately 100 cubic inches and should supply a frequency stable to less than 1 pp 10 to the 9th power per day after a warm up period of two to three weeks. The development of smaller, higher frequency crystal units for future miniature frequency standards was started. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE