<P> The next advancement was the vacuum tube detector , invented by Westinghouse engineers . On Christmas Eve 1906 , Reginald Fessenden used a synchronous rotary - spark transmitter for the first radio program broadcast , from Ocean Bluff - Brant Rock , Massachusetts . Ships at sea heard a broadcast that included Fessenden playing O Holy Night on the violin and reading a passage from the Bible . This was , for all intents and purposes , the first transmission of what is now known as amplitude modulation or AM radio . </P>
<P> The next advancement was the vacuum tube detector , invented by Westinghouse engineers . On Christmas Eve 1906 , Reginald Fessenden used a synchronous rotary - spark transmitter for the first radio program broadcast , from Ocean Bluff - Brant Rock , Massachusetts . Ships at sea heard a broadcast that included Fessenden playing O Holy Night on the violin and reading a passage from the Bible . This was , for all intents and purposes , the first transmission of what is now known as amplitude modulation or AM radio . </P>
who made the first radio broadcast in the world
who made the first radio broadcast in the world
On Christmas Eve 1906
On Christmas Eve 1906