Thank you very much for that information. I have began experimenting with the antenna and it is receiving again with mixed results.
The City of Dallas, Dallas County, and a number of smaller towns have moved over to
this regional TRS, which uses simulcast sites.
As has been noted a number of times, simulcast distortion can be extremely location specific, and with experimentation, you may find a location in your residence where the HP-2 does receive a fair amount of traffic despite simulcast issues.
What I've done, with my HP-2, in addition to moving the scanner around to try to find an optimal location, is to use the old OEM antenna, not one of the 'gain' antennas such as the REM-800B (which is the newer version of what we used to call the 'Radio Shack 800MHz antenna). I position the antenna horizontally, parallel to the desktop, not vertical. With it aligned in that manner, I get quite a few of the calls. Not 100% to be sure, but more than enough to at least be useful.