Oh, my problem is solved, I just put in way less effort than you. 
In my area, my neighbors gave up on OTA since the nearest TV stations is at least 50 miles away. I got signal because I got best of the best antennas out there and have to be precisely tuned to few TV stations. Anyway, bad signal only happens when the weather is bad so I cannot complain. In a way, I know about antenna stuffs.