Thanks for the help you guys. Unfortunately, I think my wife's patience is inversely related to the number of posts in this thread.
As far as the above questions go, I've tried aiming the antenna (left, right) while watching the signal strength and haven't been able to improve the signal. I haven't tried lowering the antenna or changing the pitch (up, down angle) but plan to try more re-positioning this weekend. It's currently mounted to the chimney but I'll try unmounting it and moving around the roof a bit. Did anyone get a chance to look at the picture I linked to to see if the neighboring house and trees might be an issue.
As far as the cabling goes, I gave a bit more detail in some of my above posts. I just replaced all of the old cabling with a single 100' 75 ohm quad shielded cable from monoprice. The single cable runs to one TV (through my Tivo box) with no splitters or couplers. The new cable seems to have fixed the pixelation on the other channels but not channel 7.
So I assume there's still no way to tell if the problem is with the signal strength or interference. And in reference to interference, what are ferrite chokes? Thanks.
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