Fascinating question. I can see why he might like it; look at all those sub channels.
https://en.wikipedia.org/wiki/KCKS-LD
http://www.rabbitears.info/market.ph...&callsign=KCKS
Since your HDHR test showed that you almost go it, maybe it's possible.
The antenna would need more gain and have a pattern that would reject the stronger signals from the south when it is aimed at KCKS at 255 degrees magnetic.
Antennas to consider are:
Antennas Direct DB4e for a little more gain and a little more narrow beamwidth
https://www.antennasdirect.com/cmss_files/attachmentlibrary/Technical%20Data%20PDF's/DB4E-TDS.pdf
Antennas Direct 91XG; even more gain and more narrow beamwidth to reject signals from the south
https://www.antennasdirect.com/cmss_files/attachmentlibrary/Technical%20Data%20PDF's/91XG-TDS.pdf
How long is the feedline from the antenna to the TV?
Try it without a preamp first. If you must have a preamp, consider the CM3410 or the Antennas Direct Juice.
Aim the antenna for best signal quality and best symbol quality on the HDHR,
The last resort would be a high gain UHF antenna, custom single channel bandpass filter for channel 25 from Tin Lee Electronics, and an overload resistant preamp.
http://www.tinlee.com/index.php
Tin Lee also makes the AC7 signal injector that could combine the KCKS antenna signal with the main antenna.
http://www.tinlee.com/PDF/AC7-custom...kup%20Info.pdf