> Is there something magic about quartz that has a turnover in the > region that > just happens to be handy for OCXOs? Or is it the other way around: > people > chose the cut angle to get a temperature that works well for ovens?
First, better heat-only than heat-cool or cool-only because of - efficiency - temperature stability (see my recent mail "against" the Peltier cell) Second, think about the inside of an instrument. Think about a heat- only control. Account for some 5 degrees minimum difference between the quartz and its environment. 70-80 degrees Celsius is the most comfortable temperature. Physicists designed the resonator for the inversion temperature to be 75 deg Celsius. That's it. > Could I cut a crystal with a temperature at (say) 0C or something > handy for > Peltiers? Probably yes, if it made sense. Very best Enrico Rubiola professor of electronics web: http://rubiola.org e-mail: [EMAIL PROTECTED] FEMTO-ST Institute 32 av. de l'Observatoire 25044 Besancon, FRANCE voice: +33(0)381.853940 (E.Rubiola) voice: +33(0)381.853999 (switchboard) fax: +33(0)381.853998 _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.