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I don’t think most people have the patience to try all of that! Luckily, most people don’t seem to have serious problems with hum.
Despite the fact that your transmitter is low power, it can put a sizable amount of RF on the ac line in your home. In some cases, quite a bit more than the 50 kW station some distance away.
Today while driving to the store, I compared the signal from my SSTran in the living room to that from my Rangemaster out on the garage roof. Driving down my street, the SSTran put out a surprisingly strong signal all the way to the end of the block– stronger than the Rangemaster in some spots– but as soon as I turned the corner, it died out. All of the signal was coming from the power line! And this, despite the fact that I am not intentionally driving it with RF.
The Rangemaster, which is on a separate ground of its own and is mounted out on the garage, is well isolated from the ac line. It goes a lot further than my living room SSTran setup, but it does not benefit from the antenna provided by the power line that goes down my street.
Instead of putting line conditioners on all of your offending appliances, what about putting one on your transmitter? If you can do a really good job of isolating the transmitter from the line, it might not bother all of your susceptible appliances. Those little chargers can really cause problems!
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