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marconi sent and recived 1st radio signal. This was a major advancement because it was one of the 1st examples of someone transmitting radio signals. this made way to many of the later inventions down the road.
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Lee de Frost was the person who took credit for the invention of the audion tube. This invention aplified sound. a major invention that later led to inventions of radios.
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8xk was the 1st radio station to brodcast publically and ts name later changed to KDKA. it was brodcasted by Frank Conrad. he would brodcast by putting a microphone to his record player.
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first advertisement on the radio. WEAF aired a 10 minute long commercial for an appartment complex. this was later how brodcasting stations stayed on the air.
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this was the act that organized the liscense of transmitors. this means that there could no longer be any more Unclecharlieradio stations. It also assinged radio stations frequencies to brodcast on.
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Edwin Armstrong expiremented with fm frequencies. theese frequencies he found out were clearer. he first began with W2XMN and expiremented.
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when the 1st tv wasinvented it majorly crippled the radio industry because many of theadvertisements were moving to tv. radio was going todie out unless they came up with an idea. there idea was to broadcast songs.
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radio show that brodcasted for 15 minutes on WGN. this show was about a little orphan girl and her troubles, but it was mostly commical. It was addapted latter to tv.
