A cut at that angle has no turn over temperature. The zero temperature coefficient point is 25°. Its temperature coefficient everywhere else is positive.
On Friday, June 2, 2017, Bob kb8tq <[email protected]> wrote: > Hi > > If you are going to use an oven, it’s better to run it at the turn > temperature of > the crystal. That would put you above 50C for an AT and a bit higher still > for an SC. > > Bob > > > On Jun 2, 2017, at 2:09 PM, Donald E. Pauly <[email protected] > <javascript:;>> wrote: > > > > https://www.febo.com/pipermail/time-nuts/2017-May/105566.html > > > > If we build this circuit it would be a bench model not designed to be > > inside a hot chassis. It would be able to lock ± 5° C of 25° C. My > > idea of an oven is to keep the crystal and oscillator at 25° C ±0.001 > > °C with 60 second warm up/cool down time. > > > > πθ°μΩω±√·Γλ > > WB0KVV > > > > ---------- Forwarded message ---------- > > From: Bob kb8tq <[email protected] <javascript:;>> > > Date: Fri, Jun 2, 2017 at 5:57 AM > > Subject: Re: [time-nuts] HP5061B Versus HP5071 Cesium Line Frequencies > > To: Discussion of precise time and frequency measurement < > [email protected] <javascript:;>> > > > > Hi > > > > I would suggest you check a few real crystals over the 20 to 40C range …. > > With all the “stuff” in a 5061, it will change (rise) at least 10C > > after turn on. > > > > Bob > > _______________________________________________ > > time-nuts mailing list -- [email protected] <javascript:;> > > 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.
