[time-nuts] Spectracom 8170 -> SWCC clock

paul swed paulswedb at gmail.com
Sun Jan 22 14:56:28 EST 2012


Yahoo for real voltage power and current. Teletype style.
Yes indeed the old loop currents seriously worked.
No AA batteries here. ;-)

When will we see a pix of this unit??
Regards
Paul
WB8TSL

On Sat, Jan 21, 2012 at 9:25 PM, Brooke Clarke <brooke at pacific.net> 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.
>>
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>>
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