To give you an idea of how long a time. The first commercial UHF Analog Tv Station to go on the air was KPTV UHF channel 27 , Portland Oregon , September 18 1952. And UHf television testing was happening before that. UHF Tv antenna designs were appearing in electronics magazines in the late 1940s , I have the magazines and books. There was a time when many people had at least some knowledge of Tv antennas. Now almost know one does.
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