Hi Some of the early 100 KHz resonators were ring shaped. The British really pioneered this side of things ( while the US was still doing bars …) back in the 1930’s. AFIK the mode is not a whispering gallery.
Given the low frequency of a 100 KHz resonator, a “not space limited” design might get to some pretty insane Q values. Meter level dimensions probably would be involved. Good luck sourcing the raw quartz :) :) :) ( …. and yes, that’s only the first of a long list of issues ….). Bob > On Mar 31, 2021, at 3:23 PM, Poul-Henning Kamp <p...@phk.freebsd.dk> wrote: > >> If you were going insane on a fountain, you likely would go with one of the >> sapphire whispering gallery devices as the start of your chain. A good one >> will blow a quartz crystal based part away …. > > That reminds me: > > I think the first quartz-crystal at Bell Labs was ring-shaped, do you know if > that used a whispering gallery vibration mode ? > > > -- > Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 > p...@freebsd.org | TCP/IP since RFC 956 > FreeBSD committer | BSD since 4.3-tahoe > Never attribute to malice what can adequately be explained by incompetence. _______________________________________________ time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an email to time-nuts-le...@lists.febo.com To unsubscribe, go to and follow the instructions there.
