Single channel filter?
 

Do they make a filter that will only allow a specific UHF channel through?

I have an MXU-59 combined with a Y-5713 (MXU-59 has a VHF passthrough) but I want to pick up another distant station on physical channel 26 but its pointing nearly 180 degrees in the opposite direction.

If I combine the antennas I suspect there will be interference. Thats why I'm wondering if there are filters that can only let through a single UHF channel through to prevent this.

Contact TinLee.com, they are not a traditional retailer of consumer consumer grade equipment but will take inquiry re. your specific situation.

The AC-7 series Signal Injector may fit your situation.

If you talk with them, I'd love to hear your review of their service.

I'll be interested to know if current pricing + taxes & shipping would make a secondary external tuner a more attractive solution.