In the 1940s, right after WWII, there was a rush to get radios into the home; AM radios, that is. Large boxes ensconced on a shelf or table; some a piece of furniture themselves, some sold as part of a stereo that included a record player.
Cincinnati had the following stations when I was a kid. WKRC 550; WLW 700; WCPO 1230; WSAI 1360; WCKY 1530 were the available. stations. All were AM; FM was not yet available. Mostly, their formats were all music, all the time.
In the 1960s, FM radio came into the home if you had a receiver. Cars were just now being sold with AM radios. You could buy an FM converter to get those channels into your automobile. In the late 1960s, AM-FM radios were being put into luxury cars and others on request.
FM stations could be built and run with relatively low wattage compared to AM stations. FM signals could not travel as far as AM, but they were more clear and could be done in stereo. Eventually, AM channels cut back or eliminated music from their format. FM sounded better and took over the music market.
It wasn't long before their was an FM channel for every type of music available. AM channels were concentrating on news and sports. That's where we are today. Where will we be tomorrow?
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