For those that are interested in this method: A read to go crystal heater can be bought from Kuhne Electronics. Look for
http://www.kuhne-electronic.de/en/shop/155_Crystal_Heater Best regards Ulrich Bangert > -----Ursprungliche Nachricht----- > Von: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] Im Auftrag von Remco den Besten > Gesendet: Montag, 8. Dezember 2008 00:25 > An: [EMAIL PROTECTED]; Discussion of precise time and > frequency measurement > Betreff: [time-nuts] thermostated 14.31818 MHz > > > In order to minimise the temperature dependency of my system > clock I made a > thermostate with an uA723, > and soldered it on the 14.31818 MHz reference crystal of the > system clock > PLL. > > The temperature of the thermostate converges to approx. 50 > degr C and the > results are really good for such a simple > solution. My jitter decreased with an order (approx 10 > times). With FreeBSD > I have 'pps stabilities' of > 0.001 - 0.003 ppm, whereas 0.020 - 0.050 ppm was observed without the > thermostate. > The PLL offset remains within +/- 1 usec most of the time for > my ntp server > ntp.remco.org. > > For graphs: see http://remco.org/difference.php > > Remco > > > > > > > > _______________________________________________ > 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.
