Timeline of the Radio

Timeline created by 7d12009
In History
  • Heinrich Hertz

    Heinrich Hertz
    Heinrich Hertz detects and produces radio waves.
  • Marchese Guglielmo Marconi

    Marchese Guglielmo Marconi
    Marchese Guglielmo Marconi builds his first radio equipment, a device that will ring a bell from 30 ft. away.
  • Marchese Guglielmo Marconi

    Marchese Guglielmo Marconi
    Marconi establishes first radio link between England and France.
  • R.A. Fessenden

    R.A. Fessenden
    American scientist R.A. Fessenden transmists human speech via radiowaves.
  • Marchese Guglielmo Marconi

    Marchese Guglielmo Marconi
    Marconi transmits telegraphic radio messages from Cornwall to Newfoundland
  • Valdemar Poulsen

    Valdemar Poulsen
    Valdemar Poulsen patents an arc transmission that generates continuous radio waves, producing a frequency of 100 kHz and receivable over 150 miles.
  • Radio Transmission

    First radio transmission of music at Graz, Austria.
  • Marchese Guglielmo Marconi

    Marchese Guglielmo Marconi
    Marconi invents the directional radio antennae.
  • R.A. Fessenden

    R.A. Fessenden
    First radio program of voice and music broadcast in the U.S. (by R.A. Fessenden)
  • R.A. Fessenden

    R.A. Fessenden
    Fessenden invents a high-frequency electric generator that produces radio waves with a frequency of 100 kHz.
  • Radio Communication

    GE develops a 100 kHz, 2 kW alternator for radio communication.
  • Radio Communication

    Radio communications gain publicity when the captain of the Montrose alerts Scotland via radio of an escaping criminal.
  • Radio Recievers

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

    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
  • Edwin Armstrong

    Edwin Armstrong
    Armstrong develops the superheterodyne radio receiver. The principle for this receiver is the basis for all radio receivers now in use.A 200 kW alternator starts operating at Station NFF, the Naval station in New Brunswick NJ, which was the most powerful radio transmitter of the time.
  • Shortwave Radio

    Shortwave radio is developed.
    RCA is founded.
  • First Licensed Radio Broadcast

    KDKA broadcasts the first regular licensed radio broadcast out of Pittsburgh, PA.
  • Contact via Shortwave

    RCA starts operating Radio Central on Long Island.
    The American Radio League establishes contact via a shortwave radio with Paul Godley in Scotland, proving that shortwave radio can be used for long distance communication.
  • WWJ Radio Station

    WWJ, an AM station in Detroit, offers the University of Michigan broadcasting rights for extension lectures.
  • Professor Dreese

    Professor Dreese
    UM's Professor Dreese submits a proposal for several UM operated stations. His proposal was tabled by the Regents, who were not concerned with radio at the time.
  • Professor Dreese

    Professor Dreese
    Dreese instead runs experimental station WCBC as a project in the basement of West Engineering. This project died at the end of the academic year.
  • WWJ Radio Station

    WJR-AM offers educational broadcasting spots to the UM. The UM continued to broadcast on WWJ as well
  • Broadcasting TV

    A radio statio in NYC, WRNY begins to broadcast television shows.
  • Radio Education

    The UM School of Music pursues the idea of radio as education. It taught school band lessons via radio.
  • Edward Armstrong

    : Educational programming originating at the UM grows.
    The Regents of the UM become interested in radio.
    WJR cuts the UM's educational broadcasts for commercial broadcasting. Edward Armstrong patents wide-band frequency modulation (FM radio).
  • FM Radio

    FM radio is born, but only in mono
  • FM Radio

    The FCC sets aside educational/non-profit bandwidth on FM.
  • First FM Station

    Columbia University's Radio Club opens the first regularly scheduled FM station
  • FM Radio

    The UM decides it needs an FM station, and expresses a commitment to radio broadcasting
  • Television is Created

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

    There are six TV stations in the nation
  • UM's First Station

    The UM starts its first station, known as Michigan Radiom or WUOM.The Regents publish a mandate for broadcasting.
    WOUM is no outlet for studen broadcasting, so student radio clubs form and create small studios in East Quadrangle and West Quadrangle. These studios broadcast on AM to their respective buildings via carrier current.
  • New Studio

    A small studio is created in the newly-erected South Quadrangle.
  • Transistor Radio

    Sony offers a miniature transistor radio. This is one of the first mass-produced consumer AM/FM radios.
    The studios in the UM dormitories jorn forces, and "The Campus Broadcasting Network" is born as WCBN-AM.
  • Advertising

    Advertising is accepted on WCBN-AM.
  • More Radio

    The number of radio receivers in the world exceeds the number of newspapers printed daily.
  • First Broadcasting Association

    WCBN hosts the first National Association of College Broadcasters.
  • Poem Broadcasted

    CBN moves into the new Student Activities Building, and its studios start to become centralized.Allan Ginsberg's controvesial poem, "Howl" is broadcast for the first time.
  • FM is Developing

    FCC approves FM stereo broadcasting, which spurs FM development.
  • Stereophonic Sound

    United States radio stations begin broadcasting in stereophonic sound.
  • Studios are Completely Centralized

    WCBN studios are completely centralized in the SAB. CBN's identity becomes stronger as its programming becomes increasingly eclectic and challenging.
  • FM Transmitter

    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.

    FM plans are finalized for WCBN. The UM Regents approves plans for WCBN-FM, and building begins.
  • 89.5 FM

    WCBN-FM 89.5 FM is born, broadcasting at 10 watts.
    WCBN-AM is maintained, and adopts a "60's Gold" format.
  • Frequency Change

    Frequency change for WCBN takes place (from 89.5FM to 88.3FM). The Sex Pistols' Never Mind the Bollocks is released. "Things change." --Ken Freedman
  • WCBN only Educational?

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

    First WCBN fundraiser is organized by Ann Rebentisch, and raises 5,000
  • 18 Hour Song

    CBN plays "It's my Party" by Leslie Gore for 18 hours straight the day after Reagan is elected.
  • Disgruntled Staff

    FCC complaint against CBN filed by disgruntled staffers. The FCC takes it very seriously but does not level a fine
  • RDS

    In Europe, FM radio stations begin to use the subcarrier signal of FM radio to transmit digital data. This RDS (radio data system) is used to transmit messages on display screens to radios.
  • Very Rude

    At WJJX (WCBN's AM counterpart), a student DJ is fired for broadcasting a series of racist jokes.
  • Poem Broadcasted

    The U-M decides to oust non-students from WCBN.
    WCBN airs Allan Ginsberg's Howl.
  • Digital Transmitter

    In Paris an experimental digital FM transmitter begins operation
  • RDS

    In the US, FM radio stations begin to use the RDS already in place in Europe.