wado66 also has another thread:
How do I read the topo map
http://forum.tvfool.com/showthread.php?t=16077
Dividing the problem into two threads makes it harder to help him. Keeping it all on one thread would be better.
His problem channel is WSMV NBC real channel 10, so a 91XG wouldn't do it. He might even need an MCM 30-2476 that can tilt up for VHF because of the hill plus a UHF antenna, if a UHF/VHF combo antenna doesn't work for NBC.
http://www.tvfool.com/?option=com_wr...e2cbd4dffce5f3
He can't use a preamp because it will be overloaded, so he must depend upon antenna gain.