[circeseye]

the only thing i can suggest is to raise the antenna higher (above the power lines usually works) make sure if you do this that you secure the hell out of it cause it will sway badly if you dont. my grandparents had the same issue and that helped fix it.
thats the problem with just using a antenna. any power tools that have alot of power will effect any signal near by sucks to no end. and having a factory accross the street really must suck