Hi Brenda,

Brenda Ann wrote:
It's kind of funny, really. Since they took clocks 'off the grid',
they've tried more and more elaborate bandaid measures to keep them
accurate. I have a good old fashioned AC synchronous wall clock that
never gains nor loses time as long as it has power, and half a dozen
"quartz-accurate" clocks that never seem to keep time, including the one
in my DVR, which loses time like crazy.

The frequency of AC power is tightly controlled. Some short
term variations in frequency are allowed. But, long term
it has to be very accurate (precisely for this reason as
a timebase).

I always wondered how wris****ches could be so damned accurate
considering how cheap they are (especially these disposable ones).
But, then realized they operate at a constant temperature, etc.

By contrast, look at how poorly clocks in cars keep time...