Early mobile radios used amplitude modulation (AM) to convey intelligence through the communications channel.
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After the M/V Fury fiasco, Ferraro purchased a small licensed AM station, WHVW in Hyde Park, New York.
On 24 December 1906, Reginald Fessenden, a Canadian inventor and radio pioneer, broadcast the first AM radio program, which started with a phonograph record of "Ombra mai fu" followed by him playing "O Holy Night" on the violin and singing the final verse.
The Wireless Group had its British origins in the company Talk Radio, named after the national AM station around which it was formed, which was later purchased by TalkCo, a consortium whose members included MVI, News International, Radio Investments and LMC Radio headed by chief executive Kelvin MacKenzie, the former editor of The Sun newspaper.
1963 -- The WEDR call letters have been in South Florida since 1963 when the station's then owner Ed Rivers acquired them from an AM radio station in Birmingham, Alabama.
Specialty awards are available for establishing two-way contact with stations in all 40 zones using certain transmission modes including: CW, AM, SSB, amateur radio satellites, Radioteletype (RTTY), a digital mode other than RTTY, or Slow-scan television (SSTV).
Ring modulation, also known as amplitude modulation, is an effect made famous by Doctor Who's Daleks and commonly used throughout sci-fi.
As for the media radio, there are amplitude modulation stations such as Radio FM and 1000, radio Ybyty Rok, Pan American, Yaguarón, Oda, Mensajera, and Carapeguá Colmenar.