I'm seriously toying with the idea of putting a small heater in the cabinet, so I can have an OCPO - oven controlled pendulum oscillator.
Hi Jim, Yes, do it! No joke. It should work really well and be easy to do. Temperature is a useful lever in almost all clocks. Also consider a 1 Hz speed modulated fan (note that 1PPS can also mean one Puff Per Second) to both energize and to synchronize your clock. Your timing is good; I'm writing a HSN article right now that touches on all the levers: LCPC -- length controlled pendulum clock (variable rod) MCFC -- mass controlled pendulum clock (variable CoG) GCPC -- gravity controlled pendulum clock (elevation) ACPC -- amplitude controlled pendulum clock (PE) VCPC -- velocity controlled pendulum clock (KE) FCFC -- friction controlled pendulum clock (Q) TCPC -- temperature controlled pendulum clock QCPC -- quartz controlled pendulum clock QEPC -- quartz enhanced pendulum clock APC -- atomic pendulum clock GPSDPC -- GPS disciplined pendulum clock The paper examines the debate between "controlling" as in keeping one or many external parameters constant, which is fair and reputable, letting the free pendulum stay free vs. "controlling" as in the active, hands-on, precise electronic measurement and unabashed manipulation of the pendulum swing itself. Although not "pure" by some measure, there's nothing wrong with the latter approach. In fact there are so many ways to manipulate pendulum clock performance that it becomes an art form in itself. I really encourage you to try the heater or the fan approach and let us know (or HSN article) how it goes. Within a certain capture range, you know the same model works for quartz and some atomic clocks as well. It's a good day in the lab when tempco can be your clever tool instead of your constant torment. /tvb _______________________________________________ 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.
