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Electromagnetic

500 CPS Synchronous Rotary Gap transmitter at Brant Rock, Ma. Ca: 1906.
Society: IEEEMain Category: ElectricEra: 1900-1909DateCreated: 1906Blackman's PointBrant RockState: MAZip: 02050Country: USAWebsite: http://www.ieeeghn.org/wiki/index.php/Milestones:First_Wireless_Radio_Broadcast_by_Reginald_A._Fessenden,_1906Creator: Reginald A. Fessenden

On 24 December 1906, the first radio broadcast for entertainment and music was transmitted from Brant Rock, Massachusetts to the general public. This pioneering broadcast was achieved after years of development work by Reginald Aubrey Fessenden (1866-1932) who built a complete system of wireless transmission and reception using amplitude modulation (AM) of continuous electromagnetic waves. This technology was a revolutionary departure from transmission of dots and dashes widespread at the time.

YearAdded:
2008
Image Credit: Courtesy Michael Thompson (CC BY-SA 2.5)Image Caption: 500 CPS Synchronous Rotary Gap transmitter at Brant Rock, Ma. Ca: 1906.Era_date_from: 1906
Society: IEEEMain Category: ElectricEra: 1890-1899DateCreated: 1890Institut Catholique de ParisParisZip: 75006Country: FranceWebsite: http://www.ieeeghn.org/wiki/index.php/Milestones:Discovery_of_Radioconduction_by_Edouard_Branly,_1890Creator: Branly, Edouard
The discovery of the radioconduction is a phenomenon which revolutionized the means of communication. It is at the origin of the development of the TSF (Télégraphie Sans Fil, or wireless telegraphy). As a member of the French Academy of Sciences (it gains vis-a-vis Marie Curie), Branly received international recognition. No more than about fifteen years separate the first wireless transmission across a few meters (1890) from the first transatlantic communication (Marconi, December 1901).
YearAdded:
2010
Image Credit: Courtesy WikipediaImage Caption: Edouard BranlyEra_date_from: 1890
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