First, please run a new TV Fool report, the the database was using information that will become accurate if and when WGPX completes the upgrade authorized in their construction permit. The TVF staff have
edited the database to reflect the current power and antenna height of WGPX. Thanks @scott784 for picking up on the problem in the first place.
The Winegard U4000 and Antennas Direct CS-4 are similar in electrical design. Both are examples of 4-bay panel antennas.
Here is an example of an
FM trap.
If WGPX-ION is a 'must have', let's look at your updated TVFR before any money is spent.