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To: Larry Holmes who wrote (1551)6/25/1999 4:55:00 PM
From: Lyle Abramowitz  Read Replies (1) | Respond to of 7618
 
Larry,

Sorry to take so long getting back to you.

In the case of power lines I think it is the current which produces the fields, at least at 60 Hz. To propagate a field over a line a waveguide is needed, the simplest form being a coaxial cable. High tension power lines are waveguides, I think. It sounds as if they may be talking about using the power line as a waveguide of some sort. I suppose that a signal modulated at some RF could be superimposed on the line. It doesn't seem like one could propagate signals very far that way and it would also has a "last mile" problem as local power distribution may not use a waveguide. I don't know much about the technology you're describing. Can you point me to the articles ?

There are existing schemes where narrowband signals can be broadcast around one's home on the power lines. There were(are?)music set-ups where a speaker is plugged into the wall and plays music from the base system. Don't know exactly how they operate.

Lyle