Hmmmm....my parents were pretty good at hiding modern technology from me. I was still standing at the set turning the tuner and adjusting the rabbit ears in the 70's. It wasn't a major chore, considering there were only 3 channels back then.
My grandparents had one of those. It made a clicking sound. I tried to replicate the sound with a plastic comb and it would not stop changing channels until I turned it off!