[rabbit73]

If KCKS is important, you will need a separate antenna with more gain aimed directly at it. If you try to use a preamp for that antenna only, it might be overloaded by your strong local signals, unless it is resistant to overload. Also, the strong signals will be weaker when the separate antenna is aimed away from them.

You can use an A/B switch to select which antenna is needed. You will need to rescan after each antenna change unless the TV can add a channel after a scan like my Sony.

An alternate plan would be to connect the main antenna to the TV antenna input and the KCKS antenna to a separate tuner with its output connected to the TV aux input.

It is possible to buy a custom combiner to integrate the KCKS antenna into one system, but that would be expensive. Each antenna should get what you want before combining. Using a splitter in reverse as a combiner probably would not work.