I have both. . Was planning of using the ab switch so I might be able to make 4 imputs. I might just do the ab switch splitter combination with an antenna conection for an experiment.
RF is surely not the technology you want to be using if you have a choice. You can get other kinds of switches that will allow you to conveniently introduce more line level signals into your TV.
Amazon and others offer 4-way composite switches for under $13 and the 8-way models can be had for under $20. S-VHS switches are more.
The motivation for staying away from RF is that each time you use it, the signal is being converted at least twice before you see it on the screen and each conversion necessarily does significant damage to the quality.
99 times out of 100, it is better to tell us specifically what you're trying to accomplish from source (i.e. Betamax videotape) to screen (i.e. HDTV) rather than starting somewhere down a path.