[time-nuts] Spectracom 8170 -> SWCC clock

paul swed paulswedb at gmail.com
Sun Jan 22 15:03:17 EST 2012


OK Clark put some pix up.


On Sun, Jan 22, 2012 at 2:58 PM, Jim Hickstein <jxh at jxh.com> wrote:

> On 1/22/12 1:56 PM, paul swed wrote:
>
>> 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??
>>
>
> It's my day off. :-)
>
>  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.**end2partygovernme**nt.com/**Brooke4Congress.html<http://end2partygovernment.com/**Brooke4Congress.html>
>>> <**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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