[time-nuts] Improving the stability of crystal oscillators
didier at cox.net
Wed Oct 10 19:24:33 EDT 2007
I bought 10kohm nominal NTC thermistors from Digikey, P/N 490-4653-ND. They
are very small, 1/10th of an inch long or so.
I have used those (or similar parts) in projects both at home and at work
(in military equipment...) for about 15 years.
> -----Original Message-----
> From: time-nuts-bounces at febo.com
> [mailto:time-nuts-bounces at febo.com] On Behalf Of SAIDJACK at aol.com
> Sent: Wednesday, October 10, 2007 1:17 PM
> To: time-nuts at febo.com
> Subject: Re: [time-nuts] Improving the stability of crystal
> In a message dated 10/10/2007 11:13:21 Pacific Daylight Time,
> jra at febo.com
> >We first built a small proportional heater circuit that we
> could shove
> >in next to the crystal, and that worked OK. We finally found a
> >source for thermistors spot welded to a spring clip that
> would mount
> >snugly directly to the crystal case. With 12 volts applied, these
> >heated the crystals very nicely. With the heaters, we were able to
> >keep the systems running year round with about 1/10 the
> service calls.
> Hi John,
> interesting anecdote!
> Would you know if the thermistors are still available? Who made them?
> ************************************** See what's new at
> http://www.aol.com _______________________________________________
> time-nuts mailing list -- time-nuts at febo.com To unsubscribe,
> go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> and follow the instructions there.
More information about the time-nuts