On Wed, 15 Nov 2006 17:20:44 -0700, Don Lancaster
wrote:

wrote:
At 15 kHz, an AT quartz resonator would need to be (in size) about 200
times that,
2 cm thick (and broader than it is thick, so it'd be a Frisbee-sized
disk). They don't
make those, as far as I know. Normal mortals couldn't afford one.


This guy came close , quartz ring, not a frisbee, but close :

http://www.btinternet.com/~time.lord/QuartzRings.html

Steve Roberts


Statek used to be the original source for tuning fork style crystals,
which is what you need at low kilohertz frequencies.

http://www.statek.com/

---
You beat me to it!

These are wonderful people.


--
JF