"How close is your neighbor? What model radio are you using
and is the output resonably clean?"
It does not matter what kind of rig is being used nor how clean it is. You
could have a rig with substantial harmonics and one that has no harmonics.
One can have -10 db 3rd order imd and the other -50. The results will be
the same.
A device that is designed as a switch at 60 Hz is acting as an hf receiver.
What is happening is receiver overload. Nothing can be done at the
transmitter, except to reduce power or move the transmitting antenna further
away from the receiver (or receiving antenna - the lines going to the
switching device). There is a rare occasion when the transmitter is
radiating through the power line, but that can be solved with a power line
filter at the transmitter.
Buying a low pass filter to solve a telephone problem, or buying a new rig
with class A finals will not solve an overload problem on a switch. Often,
these switches that are affected by stray rf are also bad crap generators,
putting square waves on your ham bands, and using their same wiring for
antennas.
Tell the neighbor to get a new dimmer, or better yet, replace the dimmer
with a swtich and forget the dimmer. If the light is too bright, put in a
smaller bulb.
If the dimmer is in a lamp, you can simply install a ferrite line core
around the line where it eneters the lamp. The antenna goes away and
neighbor is happy.
Decades ago I defended a gentlemen who had a neighbor who turned her
television set too loud and left her window open so everyone in the
neighborhood was annoyed. He asked her to turn it down, but she refused.
One day he knocked on the door and when she opened it, he took his hunting
rifle and blew away the television set. Fortunately, it was in the old days
when judges had a sense of humor and were not locked in to mandatory prison
sentences. The judge gave a lecture to the woman and made my client pay for
the damage and spend a month in the pokey. I even got his hunting rifle
back. Today, he would have 3 life sentences and be listed on the television
predator list.
Colin K7FM
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