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heinrich hertz
Heinrich detects radio waves and even produces radio waves. -
Guglielmo Marconi
In 1901 he succsessfully broadcasted a transatlantic radio signal. His company ended the isolation of time travel, and saved hundreds of lives, including the people on the titanic. -
radio waves
Valdemar poulsen patents an arc transition that makes continuous radio waves, producing a frequency of 100 kHz and can recite over 150 miles away. -
music transmission
in 1904,the first radio transmission of music at Graz,austria. -
radio attenna
Guglielmo Marconi made the first radio equipment from 30 yards away but now he has invented the radio antenna. -
Audion Tube
Lee De Forest, made the audio tube and it was a vacuum tube that amplifies signal.this was made to instead of hearing the signal, you can see the signal. -
1906 program
on Christmas eve 1906 Reginald Fessenden an engineering professor transmits a voice and music program in Massachusetts that is picked up as far away as Virginia. -
High frequency eletric generoator
Fessenden makes a high-frequency electric generator that produces radio waves with a frequency of 100 kHz. -
radio receiver
Edwin Armstrong patents a radio receiver circuit with positive feedback. Part of the amplified high-frequency signal is given back to the tuning circuit to enhance certain and sensitivity -
superheterodyne radio receiver
Armstrong develops the super heterodyne radio receiver and is now the basis for all radio receivers now in use. -
long distance
rca starts operating Radio central on long island.The American Radio League establishes contact a shortwave radio with Paul Godley in Scotland, proving that shortwave radio can also be used for long distance communication. -
educational broadcasting.
WJR-AM offers educational broadcasting spots to the UM. The UM continued to broadcast on WWJ also. -
increasing
Educational programming originating at the UM grows.
The Regents of the UM become interested in radio.
WJR stops broadcasting the UM's educational broadcasts for commercial broadcasting.Edward Armstrong patents wide band frequency modulation (FM radio). -
tv is born
Television is born ,and FM is moved from its original home of 42-50 Mhz to 88-108 Mhz to make room for TV. There are six TV stations in the nation now. -
Michigan Radium
The UM starts its first station, known as Michigan Radium or WUOM.The Regents publish a mandate for broadcasting.
WOUM is not an outlet for student broadcasting, so student radio clubs form and make small studios in East and West Quadrangle
