I recommend a Winegard HD7082P antenna connected to the CM7777 preamp. The HD7082P antenna is a all channel antenna that receives all the channels , VHF low 2 thru 6 , VHF high 7 thru 13 , UHF 14 thru 69. WTVF is being transmitted on UHF 50 - it is a weak transmission that you are not receiving with the 91XG . WTVF is all so being transmitted on VHF low 5 - it is a strong transmission that will be received by the HD7082P. Also WNPT VHF high 8 and WSMV VHF high 10 will be received by the HD7082P. Read and understand about , REAL Digital Broadcast Tv Channels , Virtual Digital Broadcast Tv Channels , Analog Broadcast Tv Channels ,
http://forum.tvfool.com/showthread.php?t=695