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Maconi sent and received first signal
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Marconi conducts the first transatlantic radio communication
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In 1903 radio's first news broadcast to ships
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In 1906 Lee De Forest created the audion tube
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Reginald Fessenden sent out a program of music and speech. he also developed the first sphisticated radio transmitter which made radio sound way better.
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The first transmission from the ground to an airplane was made.
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In 1920's one of the first radio stations was made. It was called 8XK and later named KDKA
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In 1922 WEAF aired a 10 minitute commercial or toll boradcast for an apartment complex for $50.
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In 1927 the FRC(Federal Radio Commision) was established.
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The 1930's was the start of the Golden Era for radio.
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Amplitude Modulation is also known as AM. Most talk shows are on the AM frequency.
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Regency introduces the pocket ransistor radio