Jean-Paul, This is just my opinion and I am curious. I know that gravity is a=20 very weak force and we are surrounded by so much noise that I wonder a=20 non lab grade freq meter would be able to show the change. Just asking?=20 I didn't say anything about his approach being insane or even wrong. Thanks, rich! On 8/1/2014 8:57 AM, Jean-Paul Louis wrote: > Richard, > What do you mean by "change through the noise=94? To me the experiment wa= s very repeatable and consistent. I do not know if the change was due to gr= avity, but before I criticize Dave, I would have to bring some serious data= to show that he is wrong, > > Yigit Turgut just blasted at Dave without any proof of anything. What are= Yigit's credentials to make that obviously derogatory comment. > > I have been a degreed engineer for over 42 years, and I do not reject Dav= e=92s point as insane. Crystal resonance can be affected by many things, an= d most likely gravity has a part to play. What he was showing was a deviati= on of about 2 or 3 mHz on a 10 MHz frequency. That=92s about 2.5 x 10 to th= e 10th power. > Changing the angle of the crystal relative to the gravity vector might be= the reason of the change. > > > My $0.02, > Jean-Paul > AC9GH > > On Aug 1, 2014, at 9:13 AM, Richard R. Pope wrot= e: > --=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 .