I have the RS VU-190 antenna with a preamp going into my E86 receiver. I am receiving my hd stuff from Chicago, about 25 miles as the crow flies from the transmitter SE of the transmitter in Portage, Indiana. I have been battling with reception since I got this setup about 4 months ago, and everything (except WBBM) has been pretty solid. Well, for the past 2 weeks, WGN channel 9 has not come in. I used to get a signal strength in the 80's on that WGN, but now it is hovering in the 15 range. Nothing changed with my setup at all, and all of the other stations remain the same. Any ideas on what I can try to do to get this all working again. I just don't understand why everything else from the Sears Tower is working fine and WGN has disappeared. Any help will be appreciated.