WAS NOT THE NEIGHBOR'S BUG ZAPPER - FINAL UPDATE 07-11-10
Hello all, just when you thought you knew what the problem was, time goes by, and yet another mystery solved. For all of you who have read my 100 & something posts on interference, here is the latest results of my findings.
OK GUYS, first, it was not the neighbors bug zapper. She has it on again & no interference 07-11-2010. It was not my AC service to my house. It wasn't anything in my house. It was not the neutral service ground. It was not my Mast's ground. In fact, it was nothing from my property at all.
OK, I know, the suspense is killing everyone.
IT WAS THE NEIGHBORS UNDERGROUND AC DROP. After com-ed came out with their scopes trying to scan the problem, they left. I did not see them for about two months. Then I saw them come back. They tore up a piece of the yard in back of her house & installed a brand new Transformer box for her underground drop.
It has been well over 4 or 5 months now. NO NOISE SINCE. NO NOISE AT ALL. At night, I am getting only 1.5 db or less ground floor noise. They must have found stray AC interference in her underground from the pole. And just like McDonalds says, (I'M LOVIN IT!) 
