radio history

By hotshot1o1331

  • Heinrich Hertz

    Heinrich Hertz
    Detects and produces radio waves.

  • marconi

    frist radiolink.

  • marconi

    infants the radio antennae

  • The cascade

    The cascade-tuning radio receiver and the heterodyne receiver are introduced.

  • Edwin Armstrong

    Edwin Armstrong patents a radio receiver circuit with positive feedback. Part of the amplified high-frequency signal is fed back to the tuning circuit to enhance selectivity and sensitivity.

  • Shortwave radio

    Shortwave radio is developed.
    RCA is founded.

  • Television is born

    FM is moved from its original home of 42-50 Mhz to 88-108 Mhz to make room for TV.

  • WCBN

    WCBN starts to think about purchasing an FM transmitter.
    FM is deemed necessary to reach off-campus students and the community at large. CBN's audience is a different audience from WUOM's, so there would be no competition.
    February: WCBN's Program Director announces that programming will be designed to meet the needs of the audience, not the needs of the air staff.

  • U-M President Robben

    U-M President Robben Fleming urges that WCBN should be used only for educational purposes and restricted to students only.

  • First WCBN

    First WCBN fundraiser is organized by Ann Rebentisch, and raises $5,000.

  • : In Paris

    an experimental digital FM transmitter begins operation

  • marchese

    build the fist radio equipment.