Don Collie wrote: > Yes, you can cut a crystal to have an inversion temp at 25Deg C. [well > certainly with an AT cut - I`m not sure about the SC cut.] > Cheers,............................................Don C.
The AT cut has an inflection point at 25 degrees C. You cannot get a "turnover" (which is what I think you mean an "inversion") at the inflection point. As SC cut inventor Jack Kusters explained to me, the "true" SC cut has an inflection point temperature of around 85 degrees C. You can get a turnover above or below this, depending on minor angle changes. Some crystal fabs make a so called "fake SC" cut where they attempt to change the inflection point. However, when this is done the stress compensation is degraded or lost. Rick Karlquist N6RK _______________________________________________ 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.
