I have a Winegard HD8200U antenna on a 40 foot tower and I get great reception on channels 2, 5, 6, 20 and 51. About half the time I get a great signal from 28, but other times it is seriously pixelated or the tv reports low or weak signal with no picture. It seems like there’s some sort of RFI that is causing this problem. Does anyone else have any experience with channel 28 from High Springs Fl.?