Brian your clock will be running. I can assure none of our CS, RBs or me will be. Not sure how I will break, but those pesky things called capacitors, resistors and semiconductors will. Almost every piece of test gear I have picked up as broken was due to one form or another of some cap. being bad. Don't get me wrong I love bad caps. Makes for a fine test bench. Best regards. Please send a pix. Paul WB8TSL
On Fri, Jan 31, 2014 at 2:50 PM, Brian, WA1ZMS <[email protected]> wrote: > Thanks for all the ideas and replies. Let me see if I can address all > points in just > one e-mail. > > 1) The clock(s) in question are very costly and to modify them in any way > would > instantly kill the value. These are part of history collection in 100% > original condition. > > 2) These clocks wind with a crank handle and winding rolls the cable back > onto the > main-wheel drum. (Chain drive clocks were a ~100 year later design in > America) > > 3) The pendulum is 1 meter long and takes a full second to travel from one > end to the > other. So 1PPS or 0.5PPS synching is easy to do with a magnet, etc... > > 4) The escapement is of the anchor type, and as such when you wind the > running weight > you are driving the main wheel backwards. Such an escapement will run > backwards during > the winding and so I lose about 20 seconds or so during the winding. The > speed of the wind > also can allow for a typical forward second to happen between the clicks on > the drum. > Sometimes I get a loss of 15 seconds, sometimes 20, etc... > > 5) The pendulum is still swinging during the wind. It's a 1kg weight on a > 1m > rod. Takes > lots of energy to stop it. > > 6) The escapement shaft comes through the front dial to a small second hand > and so you > can see the second hand either pause, run forward, run backwards during a > wind. > > I am concluding that without a fancy way to wind such a clock, it will only > be locked to > an external source during a typical 7-day run. I'm asking for a solution > to > a problem that > exists only as a want, not a need. Nevertheless, it is still very > satisfying > to hear the tick > of such an old clock as the trigger LEDs on a 5370B blink at the same rate. > It was TVB that > pointed out to me the idea of just how many of our Rb's, Cs's, and OCXOs > will still be > running 200 years from now. That thought still gives me pause. > > > -Brian, WA1ZMS > > _______________________________________________ > 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. > _______________________________________________ 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.
