What I had to do at my present QTH is physically move the antennas away from the house and power lines +50ft away. I have one leg of my Inverted - L going over the creek valley. (Which is fine since minnows, crayfish, and frogs, don't bitch about RFI.) I even had to move the wide-band Diamond Discone antenna since I was still getting power line noise on 2M, MURS, and even 222MHz, FM! WOW!!!! You actually got the power company to come out and do something? Huh, in WV if I even try to complain about power line noise, they say G.F.Y.S. and deal with it. So, I'm always looking for NR here as well, and thus far, distance seems the most effective, but at the cost of distant feed line loss. BTW, I also had an MFJ-9406 10W USB rig. A very fun rig indeed, whether portable, base, or mobile. Got a lot of QSL card requests from that rig's use in the 1990's. Even talked to the UK on a home brew dipole! Ended up selling it to a friend.