On Mon, Jun 20, 2016 at 10:54:44AM -0400, Christopher Browne wrote:
Interesting if the synchronization has gotten lost.
For quite a long time, electric clocks were often synchronized based on the 60hz; apparently the Hammond Clocks were from the same Hammond more noted for producing organs, which apparently also used power line frequency stability to stay in pitch... <https://en.wikipedia.org/wiki/Hammond_organ>
In the early days of quartz crystal clocks, they did *not* give as good stability as the "beats" provided by the 60hz of the power grid. It seems interesting if the power grids have decided to ignore this. While the clock application has become much less relevant, I would imagine it easier to maintain exact cadence today, with there being more precise clocks.
I suspect the power grid is doing fine, I just don't know if I trust the APC to be measuring it that accurately. -- Len Sorensen