[time-nuts] Improving the stability of crystal oscillators
Magnus Danielson
magnus at rubidium.dyndns.org
Wed Oct 10 21:00:23 UTC 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>
John,
> 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!
Agree!
Thanks!
Cheers,
Magnus
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