Got a 113BR clock many years ago because it looked like the clock in the Smithsonian. Used a 103 precision OCXO for the source.
It is noisy. That's part of why it has a heavy metal case. I expect that a rebuilt stepping motor might have been quieter. I kept it in a larger wooden box lined with R19 fiberglass insulation. I used an insulated wooden front door held by magnetic catches to close the box, had to remove the door to see it. The manual reset is a feature. If the clock stops for any reason, it stays stopped. If it restarted by itself it would authoritatively show you the wrong time. A battery and float charger are required if you want to see how much it varies in a year. If all you want is a technically attractive clock, talk to a watchmaker about driving it with a synchronous clock motor. Or do your own 10 Hz stepping motor (or whatever gear ratio is easy). Best of luck Bill Hawkins -----Original Message----- * Divider circuits need to be manually started using internal switches [snip] Similarly the motor must be manually started. "These clocks are not a lot of fun to live with. They sing along quite loudly at 1KHz." _______________________________________________ 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.
