Never thought of this

[Elton A Sanders]

Maybe this page https://fnetpublic.utk.edu/frequencymap.html but I can't get it to load. I remember a page with a heat map of frequency and phase and there could be a difference even in the same grid.
     Sandy
     WB5MMB

On Fri, Nov 29, 2024, at 3:21 PM, Jason Wright wrote:
> One of my coworkers at INL did some research into using the precise frequency measures to locate the source of grid disturbances. Essentially, his research group built a relatively cheap device that you plug into the mains. iirc, the device had a GPS (or you just told it where it was physically, I don't recall). It measured the change in frequency and reported back to a central server. They could look at the changes in the frequency as grid events propagated through the system. (iirc, this work was done 2010 or so).
> 
> I've personally wished the power companies would use a low speed signalling mechanism to put timestamps on the wire... mainly so I wouldn't have to set the clock on my microwave and oven (30 second resolution would suffice for this application).
> 
> On Fri, Nov 29, 2024 at 11:10 AM Elton A Sanders <radiodog77 at pobox.com> wrote:
>> Time stamp by power hum.
>> https://www.youtube.com/watch?v=e0elNU0iOMY 
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