Guess I simply did not read enough threads I see the pix. Thanks On Sat, Jan 21, 2012 at 9:42 PM, Brooke Clarke <bro...@pacific.net> wrote:
> Hi again: > > Sorry sent too soon. > > The time constant of the loop is L/R. By increasing R the loop runs > faster. > Western Union ran the clocks from 200 Volts with a dropping resistor to > get the desired current. > > When driven form say 12 Volts the clock response is sluggish, but when > driven from higher voltages the response is very snappy. > > I think a simple blocking oscillator could be used to charge up a photo > cap and dump it into one or more series connected clocks. > http://www.prc68.com/I/SWCC.**shtml <http://www.prc68.com/I/SWCC.shtml> > http://www.prc68.com/I/SWCC2.**shtml <http://www.prc68.com/I/SWCC2.shtml> > http://www.prc68.com/I/SETSC.**shtml#IMP2<http://www.prc68.com/I/SETSC.shtml#IMP2> > http://www.prc68.com/I/SWCC.**shtml#L<http://www.prc68.com/I/SWCC.shtml#L> > > Have Fun, > > Brooke Clarke > http://www.PRC68.com > http://www.**end2partygovernment.com/**Brooke4Congress.html<http://www.end2partygovernment.com/Brooke4Congress.html> > > > Brooke Clarke wrote: > >> Hi Jim: >> >> There are a number of options. >> >> Ken's clock clinic sells what appears to be a No. 6 Battery that has a >> synchronization function for the Western Union clocks. >> But the problem with it and the drivers for slave clocks is that they use >> fairly low voltage circuitry. >> >> Stock Tickers and Teletype machines are tpically run with loop voltages >> in the 60 to 200 Volt range. >> >> Have Fun, >> >> Brooke Clarke >> http://www.PRC68.com >> http://www.**end2partygovernment.com/**Brooke4Congress.html<http://www.end2partygovernment.com/Brooke4Congress.html> >> >> >> Jim Hickstein wrote: >> >>> I have a Spectracom 8170 in the living room (who doesn't?), and a >>> Western Union time-service clock, a.k.a SWCC clock -- a nice one, in a >>> 3-foot-high wood case. I've been watching TV with this combination for >>> years and years but never got around to feeding a pulse from the 8170 to >>> discipline the other one. Now that Western Union no longer provides the >>> service. :-) But it just begs to be done. >>> >>> I did draw up a TTL circuit, once (on a napkin, naturally, which I have >>> now misplaced), that could live inside the 8170. I figured out the minimum >>> number of inputs needed to detect when the MM:SS LED displays said 00:00 >>> (for one second). It would close a relay, which could feed the >>> winding-battery power to the hour-set solenoid down a pair of wires from 10 >>> feet away. But I never built it. >>> >>> A little over a year ago the TS clock was getting gummy and free-running >>> slower and slower, so I sent it to the clock hospital. It's back and >>> free-running nicely, so maybe it's finally time I did this. Anyone got a >>> better idea than my little TTL circuit, on a breadboard inside the 8170? >>> I'd like to get it across the rear panel without cutting a new hole, if I >>> can avoid it. But maybe the right connector would do. Another time-code >>> receiver in the TS clock, e.g. a GPS module that provides a relay closure >>> for 1 second on the hour (if such exists) might be neater. But the living >>> room faces north. >>> >>> ______________________________**_________________ >>> time-nuts mailing list -- time-nuts@febo.com >>> To unsubscribe, go to https://www.febo.com/cgi-bin/** >>> mailman/listinfo/time-nuts<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<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<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.