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
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.
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