Hi If you look at the mode shapes for the various overtones, their energy maxima are at different locations on the blank. If you put an electrode on top of the 3rd overtone energy pattern (and avoid the fundamental pattern) you will boost the 3rd and reduce the fundamental. You can actually find examples of this in production.
A more aggressive approach would be to “sort circuit” the fundamental energy so that the fundamental went down even further. While it can be done, I have never seen a production example of doing this. Bob > On Oct 27, 2016, at 11:31 PM, Richard (Rick) Karlquist > <rich...@karlquist.com> wrote: > > > > On 10/27/2016 4:50 PM, Bob Camp wrote: >> Hi >> >> Crystals are highly optimized for the specific overtone they are >> intended to operate on. In fact, you can fiddle them to the point >> that they no longer have a “fundamental” response. >> >> Bob >> > > That's interesting. Every overtone crystal I have played with > would happily oscillate at the fundamental. How do they > get rid of the fundamental? > > Rick > _______________________________________________ > 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. _______________________________________________ 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.
