The ANT751/R is not all that directional of a antenna , the ANT751/R receives all directions. The ANT751/R is aimed at the weakest stations the Tucson stations and will receive the Phoenix stations easely.
Here is a example but not the only example of a 75 ohm terminators that are installed on any unused outputs of the CM3418 distribution amplifier.
http://www.solidsignal.com/pview.asp...ator)-(SPTERM)