[sdiy] Re: radio signal riding on mains

[J. Larry Hendry]

R.F. "carrier" is actually quite common on AC power lines in the US at
138,000 volts and above.  Frequency ranges are 75-200Khz.  It is blocked at
the ends of the power line with simple tuned wave traps that are almost
invisible to the 60Hz (big coil, little cap)  :).
Larry Hendry


----- Original Message -----
From: KA4HJH <ka4hjh at gte.net>
Old-fashioned (wire as opposed to optic fiber)
cable TV systems in the US have the signal riding
on 30 or 60V, 60Hz square-wave AC.