> Here is another idea: how about subjecting the watch to 32KHz ultrasonic > sound that beats with, and pulls the tuning fork?
I did this a couple of years ago with mixed results. I think one reason is that the hp 32 kHz signal generator wasn't stable enough and I probably dithered the poor tuning fork more than pulled it. Still, it clearly looked like it would work. You can buy 30 kHz ultrasonic transducers for a few dollars. Also, have a look at: http://www.leapsecond.com/pages/Junghans/ That wrist watch data was collected simply with a magnetic coil pick-up, amplified, and sent directly to a 53132A as a 1PPS signal. Those of you curious about the world of mechanical watch, clock, and pendulum measurement (as opposed to the usual time-nuts focus on precision electronic timekeeping) should spend a few minutes looking at Bryan Mumford's site. Almost all the mechanical clock and watch guys I know use his gear: http://www.bmumford.com/ Also check out his cool time machine (intervalometer). /tvb _______________________________________________ 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.
