[time-nuts] No more 60Hz, How do I discipline 120VAC 60Hz from a UPS

EB4APL eb4apl at cembreros.jazztel.es
Sat Jun 25 18:54:05 UTC 2011

I remember that on the NASA Manned Flight Tracking Stations during the 
Apollo program, inside one of the racks of the timing subsystem was a 
big Marantz HiFi amplifier.  It was used to amplify a 60 Hz signal 
derived from the Cesium reference to drive the common wall clocks that 
were in many places.  Of course, the operations time displays were digital.

Ignacio, EB4APL

On 25/06/2011 18:50, Don Mimlitch wrote:
> I collect clocks an have many clocks with 60Hz Synchronous Motors.
> How would I go about Disciplining a 60Hz 120VAC source from an
> Unintteruptable Power Supply (UPS)?
> This would solve both my problem with power outages and the new problem
> of possibly undisciplined power from the power companies (Henry Warren
> must be rolling over in his grave!)
> I have no Idea how you would disciple such a low frequency at such a high voltage and
> deliver the power required to drive several (or many) Clocks.
> I assume you would start with a commercially available UPS and either a disciplined 1 Second
> or 10Mhz source such as a thunderbolt (also powered off the UPS or the batteries in the UPS).
> Does anyone have an suggestions for circuits which would do this disciplining?
> Thanks
> Don
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