[time-nuts] Features of a Precision Clock?

[Bill Hawkins]

How about a version that works from the 50/60 Hz power frequency
with a 1 PPS output and internal micro clock oscillator?

Great for watching the power grid lose time and regain it as the
power generated vs. consumed balance varies. If the power line
PPS lags behind at an increasing rate, it's time to turn off the
air conditioner and run all those clock ovens on battery before
the under-frequency relays start cascading.

Of course, you need the precision version for comparison.

Does anybody in this group look at power line frequency drift?

Bill Hawkins