[time-nuts] Improving the stability of crystal oscillators

Magnus Danielson magnus at rubidium.dyndns.org
Wed Oct 10 17:00:23 EDT 2007

From: SAIDJACK at aol.com
Subject: Re: [time-nuts] Improving the stability of crystal oscillators
Date: Wed, 10 Oct 2007 14:17:24 EDT
Message-ID: <bd4.1a3ab729.343e7134 at aol.com>


> In a message dated 10/10/2007 11:13:21 Pacific Daylight Time, jra at febo.com  
> writes:
> >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!




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