I have a Radio Shack 15-2160 mountd on a mast about 12-15 feet above the roofline with solid RG-6 lead in direct to my receiver.
One day when it was very windy I was able to lock on to KAMC 28.1.
All the other stations come in fine.
I did not watch NBC last night, however I did watch a little of the tennis yesterday afternoon and there were no apparrent audio problems.
From my roof top I can see the towers of KLBK and KAMC. KAMC is almost directly behind KLBK, that may be some of my problem.
z71tahoe193, by awful. do you mean pixellation, or just the SD picture on an HD monitor?
My picture on KLBK-DT is very good, this may be a characteristic of my analog projector, vs a digital projector or RPTV, I don't know.