"Steve Stone" wrote in message
et...

From:
http://www.qrpis.org/~k3ng/bpl.html
-----------

Q: What is intermodulation?

A: Intermodulation is the mixing of radio signals which produces new
radio signals. Think of
it as radio waves having children. But just how do radio waves have
children ?


[snip]

Reality trumps theory. BPL is being tested. If BPL was making much in
the way of harmonics or IMD products, the low end of the BPL spectrum
will be interfering with the high end of the BPL spectrum. The high end
of the BPL spectrum would be interfering with TV and FM radio.

BPL's fundamentals are the confirmed problem for the radio hobbyist. Ed
Hare and other radio amateurs have done alot of work documenting the
interference levels on SW radio.

Frank Dresser