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Radio History

  • Julio Cervera Baviera

    Julio Cervera Baviera
    Julio was inspired by Marconi with his radio work, so he created his own radio system in Spain around 1902. For his inspiration, he was able to visit Marconi's radio-telegraphic installations on the English Channel. Marconi and Julio were able to work together on resolving the issues of the wireless telegraph and set up a patent.
  • Marconi

    Marconi
    Marconi was an italian inventor and he sent and received the first radio signal in 1901. Marconi was able to save many lives from the Titanic with the radios he created. Marconi was inspired by Heinrich Rudolf Hertz, thus inventing radios. After his rescue mission, he won a Noble Prize in 1909.
  • Telefunken

    Telefunken
    Telefunken was a company that was founded on May 27, 1903. The makers of the company were Siemens and Halske or (S&H). Telefunken started in Berlin and traveled to New York to put down 600 ft. radio towers there.
  • Audion Tube

    Audion Tube
    Lee De Forest created the audion tube in 1906. The audion tube was a vacuum tube that amplified radio signals. He provided a patent for his invention on November 13, 1906. The audion tube was originated from Edison's lightbulb. No one understood what was going on because this was invented 15 years before the electron was discovered, so they called it the "Edison Effect".
  • Charles David Herrold

    Charles David Herrold
    Charles was an electronics instructor in San Jose, California, who constructed a broadcasting station. He modulated the frequency with a human voice and music later on. His radio station, "San Jose Calling" slowly became known today as KCBS in San Francisco, California.
  • First Broadcast Program

    First Broadcast Program
    The first radio news program made its appearance on radio on August 31, 1920. The station was called 8MK and took place in Detroit, Michigan. Since Michigan is east of the Mississippi River, the call number would have a 'K'.
  • Uncle Charlie

    Uncle Charlie
    People were trying to make their own radio stations since free music, information, etc. was available to everyone. This created a huge problem for a lot of radio stations. All the people that were creating radio stations were making too many frequencies to separate them on radio dial. Uncle Charlie solved this problem by changing to a new frequency.
  • Edwin Armstrong

    Edwin Armstrong
    Edwin Armstrong was an inventor who patented 3 things: regeneration, superheterodyne circuit, and frequency modulation(FM). FM waves were way stronger than AM(Amplitude Modulation) because FM was only for music and AM was for talking and news. Frequency Modulation waves are ranged from 88-108 MH2.
  • Advertising

    Advertising
    Advertising played a huge role in radio history. Ads would play after music or information that played. Radio makes money this way. In 1922, WEAF broadcasted a 10 minute "commercial" for an an apartment complex charging $50.
  • Radio's Demise

    Radio's Demise
    Radio got unpopular when TV came out. TV was invented in the late 1930's. During this time, advertisers went to TV instead of radios. Radio stations lost a lot of their money so they thought of a way to earn it back. MUSIC!!! If it hadn't been the existence of music, radio would've been something in the past.
  • Television

    Television
    Radio changed because of television. Radio stations lost their money because advertisers moved to television to pay on there. Radio was able to survive because they started playing music instead.
  • Golden Era

    Golden Era
    The Golden Era happened in the 30's and the 40's. This occurred during the Great Depression. What was good about radio was that it provided an escape for the people who weren't in their happiest of moods.
  • Changing Radio

    Changing Radio
    Radio has changed from being just AM stations to AM and FM stations. AM stations played everything, from news to music. Now they upgraded and use just FM for music because the wavelengths are long and more powerful.
  • Mobile Phones

    Mobile Phones
    Mobile phones were introduced in 1947 by AT&T in a commercial. At first, the commercials were spread in little towns only to increase the number of customers. Since there were only 3 radio channels available, only 3 customers were able to order at a time. Having a mobile phone was costly as well, paying a lot for the service and every local call.
  • Other Music Companies

    Other Music Companies
    Other music companies came into play by letting people listen to music without having to listen to the radio. Spotify, I-Heart Radio, Pandora and YouTube were all companies where you could download songs for free. That's why today they added the copyrights to almost all songs so the artists could get their money and credit.