The housing on the CA7078 has the matching transformer that connects the antenna metal receiving elements to the coax connection. Check out the housing/transformer the connections inside and the coax connection. I recommend remove All of the preamplifier , the outside part and the inside parts so you are not tempted to connect the preamplifier. Then after checking out the matching transformer on the CA7078 , run one known to be good coax from the CA7078 through a open window or door direct to the tv that has a built in Digital Broadcast Tuner , what is the reception like now?? The Tv stations that are in the direction that you are receiving have a spread of about 25 degrees. The CA7078 has a wide forward beam width. The
http://www.winegarddirect.com , HD7698P , has a narrower beam width that will cover the 25 degree spread. The HD7698P antenna has more gain then the CA7078 so the HD7698P antenna will supply more signal to the Tv's with out a preamplifier. A distribution amplifier CM3414 can be used if needed.