An interferogram showing the nodes etc. of such a resonating quartz crystal ring was posted by me in either February or March 2020.
Bruce > On 01 April 2021 at 15:16 Bob kb8tq <[email protected]> wrote: > > > 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 <[email protected]> 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 > > [email protected] | 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 -- [email protected] -- To unsubscribe send an > email to [email protected] > To unsubscribe, go to and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] -- To unsubscribe send an email to [email protected] To unsubscribe, go to and follow the instructions there.
