Hi Tom--most television antennas uses a conventional 300-Ohm to 75-Ohm Balanced-to-Unbalanced balun, and the 75-Ohm transmission line is just led away from the antenna in a manner to keep it near to the antenna centerline or boom.
With UHF television antennas, you can use ferrite beads slipped over the coaxial cable as a choke balun. You can buy split ferrite beads so you do not have to remove the F-connector to slip them over the coaxial cable. See
https://www.digikey.com/en/products/det ... 81/8594058That bead has an ID of 0.354. An RG-6 cable should have an OD of about 7mm or 0.275-inch.
This smaller bead will be a tight fit; its ID is 6.60mm:
https://www.digikey.com/en/products/det ... 81/8594000Of you could fashion a coil from the transmission line. The one on my VHF Marine Band antenna was a diameter of about three inches and has two turns.
It can't hurt turn to try a choke balun. Generally suppression of antenna currents on the transmission line tends to improve the pattern of the antenna by keeping everything symmetrical. I have used ferrite bead slip-over hinged beads on some TV antennas I have at my condo which are indoors and are pointing out a window.
Re the TV antenna in my attic, you can see the TV antenna in another article. Visit:
Reception of UHF TV Stations in Northern Leelanau County Michiganhttps://continuouswave.com/radio/UHF_TV ... higan.html