Hi For that matter, how hard is it to put it in a vacuum with temperature control? Gets two big issues out of the way pretty fast. We certainly buy crystal oscillators that are heated and enclosed in pressure tight containers (not quite the same as vacuum, but close).
Bob -----Original Message----- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Bob Holmstrom Sent: Monday, August 09, 2010 12:47 PM To: time-nuts@febo.com Subject: Re: [time-nuts] Regulating a pendulum clock Food for thought. I find it interesting that no one has suggested alternatives to improving the performance of a pendulum clock other than controlling it with a higher performance clock. If the goal is a better clock why not attempt to understand the source of the errors and work on methods to control or compensate for them? Teddy Hall has been taken to task for using a quartz controlled oscillator to measure the amplitude of a pendulum in the control loop of his Littlemore clock. Tom Van Baak has developed techniques for analyzing the performance and hence potential error sources of pendulum clocks - perhaps he will share some of his work here. Horological history is full of many attempts at solutions to the problem, but it would seem that the creativity of this group might generate some new ideas that are more in the spirit of better timekeeping than attaching the pendulum to a better oscillator. How about a wireless controlled device attached to the pendulum that changes its position based on error sensor readings, not time errors, but instead, temperature, barometric pressure, gravity, etc. that would maintain a more constant pendulum period? Bob Holmström Editor Horological Science Newsletter www.hsn161.com _______________________________________________ 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.
