"Michael Black" wrote in message
...

"DesignGuy" ) writes:
For several years there have been annoying carriers on the SW bands at
my
location - one of which was parked on top of WWV 10MHz. I recently
decided
to track down some various RFI noise and discovered that my home
intercom
system was the culprit. The one I have includes an AM/FM receiver and I
think it's the FM section putting out a carrier on or about 10MHz.

Hope this helps someone with similar troubles.



How are the intercom stations connected? There's the obvious wire, but
at lest some use signals in the hundreds of KHz range. The signal is
impressed on the house wiring, and while much of the signal will be
limited
to the AC line, obviously some of the weak signal can radiate.


Sorry, forgot to mention this is a *wired* intercom, built in the walls of
the house. Not like the kind that plug in a run over the AC lines.