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1920s it resulted in the creation of the AM broadcast band.
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The shortwave video was made in 1922 by Frank Conrad.
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Reserved for non-commercial stations, with the other eighty normally used by commercial stations.
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The first "commercial" cable radio station in the United States was CABL-FM 108 in California
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Direct-to-consumer satellite radio broadcasting was introduced in the United States in 1997
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When it was established in July 1986, Radio 2000 would "simulcast" the original soundtracks of television programmes which were dubbed in Afrikaans, thereby catering for English speakers who wished to watch them in the original language.[3]
