Donald manson working as an employee of the marconi company

Radio History-Naima Batson

By naimabatson

  • First radio signal

    First radio signal
    Italian inventor Marconi sent and recieved the first radio signal. He didnt actuall say anthing just sent thea signal such as morris code.

  • Fleming invents the diode valve

    Profesor in london, acted as a consulted to Marconi. He new dectectors were very weak and created something to make them stronger

  • Audion Tube

    Audion Tube
    Lee De Forest created( or borrowed the idea for) the Audion tube. The audion tube ia a vacuum tube that amplifies signals. It's widels believed that the canadian inventor Reginald Fessended actually came up with the idea, but Fessenden didnt seem to make it into the books for the invention

  • The triode used as an amplifer

    The triode used as an amplifer
    De forest succeeded in using the triode as an amplifer after many attempts. He built the amplifer with two devices

  • armstrong invets the superhet

    armstrong invets the superhet
    Armstrong developed a reciever where the incoming signal was converted down to a fixed intermediate frequency. There is can be amplified and filtered

  • The first clear transmission

    The first clear transmission
    This was the first clear transmission of human speech. Adter experimenting many times.

  • Radio Stations

    Radio Stations
    The first radio station was 8xk later names KDKA. Frank Conrad was the speaker. The radio station has been around for 93 years broad casting out of pittsburg pennsylvania.

  • The dawn of advertising

    The dawn of advertising
    In 1922 WEAF aired a 10 minute comercial or toll broadcast. THe did this from an apartment and charged $50.

  • FRC

    FRC
    This was estblashed because uncle charlie was too popular. Established 1927. It organized the licensing of transmitters. They also assigned station frequencies, call letters, and power limits.

  • Golder era

    Golder era
    This was the middle of the great depression when listening to the radio was considered a "escape". People were tight on money but havining a radio was essential. The radio was also a family medium, everybody could listen together.

  • A new wave length plan

    A new wave length plan
    New wave lengths were set un in europe at the time of the war. GIven a few medium frequencies

  • Radio's Demise

    Radio's Demise
    As popularity grew towards tv so did advertising. Advertisers thought it was smarter to show the views the product rather for them to just hear it. So when the money went to tv radio started to downfall.

  • HIghest paid singer

    HIghest paid singer
    Janet Jackson becomes the highest-paid musician in history when she signs an $80-million deal with Virgin Records.

  • Music share

    Music share
    Apple Computer introduces Apple iTunes Music Store, which allows people to download songs for 99 cents each.

  • Micheal jackson dies

    Micheal jackson dies
    Michael Jackson, the pop icon, dies suddenly in Los Angeles, California, on June 25, 2009, of cardiac arrest. His death stunned fans around the world. He had been set to embark on a comeback tour at the time of his death.