[time-nuts] Quartz crystall and beyond (was: What’s the BEST crystal?)

[Poul-Henning Kamp]

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In message <20200229225810.821060243849550a915d21f7 at kinali.ch>, Attila Kinali writes:

> >The diameter of the blank has to be scaled with its thickness, in
> >order not to compromise the f*Q product. Which in turn makes it
> >a bit problematic in terms of packaging, but nothing unsolvable.
> 
> Isn't that where "whispering gallery" modes come into the picture ?

Different concept. Quartz oscillators are mechanical resonators.

I am pretty sure that the first Quartz resonators Bell Labs played
with, almost a hundred years ago, were whispering gallery mode:

	https://archive.org/details/bstj8-3-493/page/n3/mode/2up


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