Hi Antonio, precise pendulum clocks also suffer rate jumps, the process of rate jumping seems to be common to most time counting systems.
I have an LPRO rubidium oscillator. I mounted it on a heat sink with fins and placed it in an insulated box. A small (40mm) fan is switched to control the base-plate temperature at 40*C + or - 0.05*. As it warms up to the control point the oscillator control voltage changes by 1 volt, so the oscillator control voltage is very temperature sensitive. I do not think it will age beyond its control range. I hope that the temperature control will improve the frequency accuracy by a large ratio. cheers, Neville Michie On 23/10/2008, at 8:02 AM, iovane@@inwind..it wrote: > I would be very pleased to know when (date and time) anybody > out there happened to record jumps in frequency of crystals. > I have stable (e-07) tuning forks which happen to jump too, > and I don't understand why, even having under control > temperature and air pressure. Sometimes they return to their > prior frequency with another jump, and this could happen even > days later, sometimes they jump and then recover smoothly the > prior frequency in a short time (such as one hour). > I have no idea whether any correlations would exist between > crystals and tuning forks jumps, regarding the causes that > could trigger metastability, and hence I would have a look at > crystal data in order to improve the base for future > speculation. > > Thanks in advance. > Antonio I8IOV > > > > _______________________________________________ > 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.
