[time-nuts] 50/60 Hz clocks
paulswedb at gmail.com
Thu Mar 10 22:38:01 UTC 2011
Be it 50 or 60 Hertz clocks if you do not want to alter it you need to use a
DC to AC converter. Generally these things are inexpensive and used for cars
or computer UPS systems. Though some of these actually have a square wave
out. Not great for the little motors.
Internally you would need to get into the thing that controls the 60 Hz
frequency and add your control in from the Tbolt by any number of
approaches. The other thing you need is a way to slew the clock forward or
back to synchronize it.
This is all fairly inexpensive I see APC UPS's at fleamarkets for very
little cost. Especially if the batteries are dead.
That would be my non HP approach to the problem.
On Thu, Mar 10, 2011 at 5:21 PM, ehydra <ehydra at arcor.de> wrote:
> The exclusive solution feasible is:
> Nice, as you can program it for PPS at 10KHz or some other frequency.
> More cheap, not so spectacular:
> Cirrus CS2000 PLL
> Locks on 50Hz or more
> - Henry
> Cezary Rozluski schrieb:
> Let us suppose I have Thunderbolt (I really have one) as a time/frequency
>> source, but any other time-nuts recognized frequency source should by
>> sufficient for the fun to drive old 50/60Hz stuff with the highest precision
>> available (and for fun, comparable to www.leapsecond.com solution,
>> modulo cesium/hydrogen clock). It would be very nice to see correction for
>> leap seconds as well :-) :-)
> time-nuts mailing list -- time-nuts at febo.com
> To unsubscribe, go to
> and follow the instructions there.
More information about the time-nuts