Don and group, I was about to write about the "pendulum as a VCO" concept. I've seen articles in the NAWCC Horological Journal that describe ways to do it, but have been hesitant to do anything to my grandfather's Seth Thomas wall clock. It gets wound once a week, and generally doesn't need setting.
One thing about an old clock, though. The minute hand can be off by a minute on either side of vertical due to gravity and wear of the gears. "Anathem" surprises on many levels, especially the 'alien' encounter. Excellent "elsewhere" read, far from the daily news. Bill Hawkins -----Original Message----- From: Don Latham Sent: Wednesday, March 04, 2009 1:22 PM I've driven "quartz movement" clocks with one pps signals, bypassing the "quartz" works. To synchronize pendula (?) is relatively simple, but best done using a mechanical/magnetic impulse phase locked loop, considering the pendulum as a VCO. BTW, I recommend Stephenson's new effort, "Anathem" loosely based on the clock of the Long Now Foundation, q.v. Don Latham -- Dr. Don Latham AJ7LL Six Mile Systems LLP 17850 Six Mile Road POB 134 Huson, MT, 59846 VOX 406-626-4304 www.lightningforensics.com www.sixmilesystems.com _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
