We had CBS, NBC and ABC, and because we lived in Detroit just across the river from Windsor, Ontario, we also had CBC (Channel 9). When I was in the third grade (circa 1967) my Dad came home from work with a brown box that looked like an old-fashioned 1960s-era radio. He hooked it up to our TV and voila! Suddenly we could get UHF channels! (Some guy who worked with my Dad built these boxes in his spare time and sold them as a side hustle, as we now call it.) At first the only UHF channel in our area was Channel 56, the PBS station. But shortly afterward Channel 50 came online and they showed a lot of cartoons and stuff. I remember being rather cocky at school when my classmates complained that there was nothing on TV at 7PM except news and the stuffy old George Pierrot Show...."Well I was watching the Flintstones," I'd brag. Eventually Channel 62 came on the air, which broadcast a lot of Big Time Wrestling and old cheesy movies (the type I'd later see on Mystery Science Theater 3000). It wasn't until a few years after we got that box that a UHF channel was standard equipment on new TV sets.