Hi And you want to keep both sides of the tuning fork equal length to roughly one part in 50,000 when you move it 1 part in 365.
Bob -----Original Message----- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Jim Lux Sent: Tuesday, May 17, 2011 11:09 AM To: time-nuts@febo.com Subject: Re: [time-nuts] Sidereal timekeeping On 5/17/11 7:01 AM, Jean-Louis Oneto wrote: > I realized that there was lot of way to avoid this [pulldown] problem, > but as I said, it was a long time ago (around 1976...), I was young and > inexperimented, and I just tried once on an almost broken 5 FF (~$1) > wristwatch, then I decided that the software approach would be better > for me. > I used a fine-grained handheld sharpening stone very carefully and just > a few light touchs were enough (um, rather too much!). > a bit of jeweler's rouge embedded on the end of a pencil eraser or wooden stick and a steady hand. 1000 grit lapping paper might be even better, because you wouldn't have to worry about the grit remaining on the quartz. You've got a pretty big move.. one part in 365, right? It's not like moving a 10 MHz crystal up by 1000 Hz. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.