Radio

Timeline of the Radio

Timeline created by 7d12009 in History
Event Date: Event Title: Event Description:
230px heinrich rudolf hertz Heinrich Hertz Heinrich Hertz detects and produces radio waves.
225px guglielmo marconi Marchese Guglielmo Marconi Marchese Guglielmo Marconi builds his first radio equipment, a device that will ring a bell from 30 ft. away.
225px guglielmo marconi Marchese Guglielmo Marconi Marconi establishes first radio link between England and France.
220px fessenden R.A. Fessenden American scientist R.A. Fessenden transmists human speech via radiowaves.
225px guglielmo marconi Marchese Guglielmo Marconi Marconi transmits telegraphic radio messages from Cornwall to Newfoundland
200px valdemar poulsen c1898 Valdemar Poulsen Valdemar Poulsen patents an arc transmission that generates continuous radio waves, producing a frequency of 100 kHz and receivable over 150 miles.
Timeline Radio Transmission First radio transmission of music at Graz, Austria.
225px guglielmo marconi Marchese Guglielmo Marconi Marconi invents the directional radio antennae.
220px fessenden R.A. Fessenden First radio program of voice and music broadcast in the U.S. (by R.A. Fessenden)
220px fessenden R.A. Fessenden Fessenden invents a high-frequency electric generator that produces radio waves with a frequency of 100 kHz.
Timeline Radio Communication GE develops a 100 kHz, 2 kW alternator for radio communication.
Timeline Radio Communication Radio communications gain publicity when the captain of the Montrose alerts Scotland via radio of an escaping criminal.
Timeline Radio Recievers The cascade-tuning radio receiver and the heterodyne receiver are introduced.
225px edwinhowardarmstrong 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
225px edwinhowardarmstrong 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.
Timeline Shortwave Radio Shortwave radio is developed.
RCA is founded.
Timeline First Licensed Radio Broadcast KDKA broadcasts the first regular licensed radio broadcast out of Pittsburgh, PA.
Timeline 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.
Timeline WWJ Radio Station WWJ, an AM station in Detroit, offers the University of Michigan broadcasting rights for extension lectures.
1 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.
1 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.
Timeline WWJ Radio Station WJR-AM offers educational broadcasting spots to the UM. The UM continued to broadcast on WWJ as well
Timeline Broadcasting TV A radio statio in NYC, WRNY begins to broadcast television shows.
Timeline Radio Education The UM School of Music pursues the idea of radio as education. It taught school band lessons via radio.
Timeline 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).
Timeline FM Radio FM radio is born, but only in mono
Timeline FM Radio The FCC sets aside educational/non-profit bandwidth on FM.
Timeline First FM Station Columbia University's Radio Club opens the first regularly scheduled FM station
Timeline FM Radio The UM decides it needs an FM station, and expresses a commitment to radio broadcasting
Timeline 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.
Timeline Television There are six TV stations in the nation
Timeline 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.
Timeline New Studio A small studio is created in the newly-erected South Quadrangle.
Timeline 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.
Timeline Advertising Advertising is accepted on WCBN-AM.
Timeline More Radio The number of radio receivers in the world exceeds the number of newspapers printed daily.
Timeline First Broadcasting Association WCBN hosts the first National Association of College Broadcasters.
Timeline 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.
Timeline FM is Developing FCC approves FM stereo broadcasting, which spurs FM development.
Timeline Stereophonic Sound United States radio stations begin broadcasting in stereophonic sound.
Timeline 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.
Timeline 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.
Timeline WCBN-FM FM plans are finalized for WCBN. The UM Regents approves plans for WCBN-FM, and building begins.
Timeline 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.
Timeline 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
Timeline WCBN only Educational? U-M President Robben Fleming urges that WCBN should be used only for educational purposes and restricted to students only
Timeline Radio Fundraiser First WCBN fundraiser is organized by Ann Rebentisch, and raises 5,000
Timeline 18 Hour Song CBN plays "It's my Party" by Leslie Gore for 18 hours straight the day after Reagan is elected.
Timeline Disgruntled Staff FCC complaint against CBN filed by disgruntled staffers. The FCC takes it very seriously but does not level a fine
Timeline 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.
Timeline Very Rude At WJJX (WCBN's AM counterpart), a student DJ is fired for broadcasting a series of racist jokes.
Timeline Poem Broadcasted The U-M decides to oust non-students from WCBN.
WCBN airs Allan Ginsberg's Howl.
Timeline Digital Transmitter In Paris an experimental digital FM transmitter begins operation
Timeline RDS In the US, FM radio stations begin to use the RDS already in place in Europe.