Allen, I agree. I'm wondering if the average frequency meter is sensitive=20 enough to detect the change through the noise. I don't know, maybe,=20 maybe not. I might try to replicate his findings. Thanks, rich! On 8/1/2014 8:04 AM, Allen Mulvey wrote: > It has become extremely obvious to me lately, as I have been working on t= he > doors of my house, that gravity bends and warps things. It would seem tha= t a > quartz crystal is no different. Stress is applied, no matter how slight. = I > would expect such stress to influence the resonance of the crystal. I.e. > Change the stress =3D change the resonance. > > Allen > >> -----Original Message----- >> From: piclist-bounces@mit.edu [mailto:piclist-bounces@mit.edu] On Behalf > --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .