Interesting. It appears to me that it's not simply a power quality issue anymore, it's likely that the old wiring and transformer winding is also arcing over, a

Interesting. It appears to me that it's not simply a power quality issue anymore, it's likely that the old wiring and transformer winding is also arcing over, and creates enormous amount of wideband radio frequency interference, like a spark-gap transmitter, both in the airwaves and on the power lines. It seriously degrades any wireless communication and digital wired communication like DSL as well. If you have a SDR capable of receiving shortwave below 30 MHz, try walking around the neighborhood with a laptop with a loop antenna connected to the SDR, and check the HF spectrum. It's likely that you'll see the entire bands being wiping out. If so, it's a serious violation of radio regulation, you can report the situation to the FCC.