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In this day of dozens of HDTV channels delivered via hardwired cable or satellite transmission, it’s hard to remember that watching TV wasn’t always quite so easy. Way back when, every television had an antenna connected to it. If you were distant from the transmission tower, you might have had a big mast antenna on your roof, as did your next-door neighbor, and his next-door neighbor, and so on, until the suburban skyline came to be defined by these skeletal sculptures reaching into the bright dawn of a soaring postwar America. If you lived a little closer to the tower, you probably just used the telescopic rabbit ears poking up from the back or top of every set, and the ritual of changing channels (to another of the seven or eight available) involved walking across the room, manually clicking the TV’s rotary tuning knob, and then reorienting the antenna arms to minimize the distortion. Even then, it didn’t always work. Depending on conditions, it wasn’t uncommon to get snowy artifacts from a weak signal, or ghosting caused by multipath reception as the signal bounced off nearby buildings or other large objects.