James Burke did a whole episode of Connections on that subject: https://www.youtube.com/playlist?list=PL777ACC303F62C744
The oldest example of an automated phase locked loop I have heard of was used for calibrating newly built pendulum clocks to a master pendulum clock. On Wed, 9 May 2012 17:45:06 -0500, "Don Lewis" <[email protected]> wrote: >Thanks, all ...this thread has helped me a lot. > >It reinforces my beliefs of what a 'second' is ...what we were taught from >day 1 in school: > >One solar day/86,400 (A 'solar' day being an earth solar day) > >So as I try to rationalize all this in my mind, ...a good cesium unit is >just a sophisticated 'counter'. The counter gate is just the solar day. > >It's interesting to note (to ask?): When did someone get smart enough to >start measuring 1/86thousthanth of a day, ....That starts needing a standard >in itself. _______________________________________________ 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.
