That sounds like normal crystal aging. See <http://www.ieee-uffc.org/freqcontrol/quartz/vig/vigaging.htm>
-----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Chuck Harris Sent: Thursday, June 05, 2008 11:21 AM To: Discussion of precise time and frequency measurement Subject: [time-nuts] An interesting behavior with my Sulzer 2.5A... Hi Gang! Being the season of thunderstorms and protracted power outages; As my UPS quit before the power restored, I am reminded of a behavior that I have always found curious: When the power fails on my Sulzer 2.5A, for more than a few minutes, the frequency takes a quick hop lower a few parts in E9. I then get to spend a couple of days bringing it back on frequency, and find that for the next several month it begins a very slow climb up in frequency back to where it was after the short interruption in power. Any ideas on what is happening? -Chuck Harris _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
