Ah the mystery channel 2 or 3 switch. Why the choice was given on all of these RF switches, I'll never know, because not gonna look it up. When I was growing up, HBO was channel 3, which led to some interesting lead-ins while preparing to play video games (my favorite was Dream On; learned a bunch about women from that show). No one I knew had this set to channel 2. Still, somehow this thing would get changed and you would be trying to figure out why you couldn't see your new crap game on the TV. Let them henceforth be known as switch elves.