Portal:Radio
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Welcome to Wikipedia's portal for Radio.
Radio is the wireless transmission of signals, by modulation of electromagnetic waves with frequencies below those of visible light.
Electromagnetic radiation travels by means of oscillating electromagnetic fields that pass through the air and the vacuum of space. It does not require a medium of transport. Information is carried by systematically changing (modulating) some property of the radiated waves, such as their amplitude or their frequency. When radio waves pass an electrical conductor, the oscillating fields induce an alternating current in the conductor. This can be detected and transformed into sound or other signals that carry information.
The word 'radio' is used to describe this phenomenon, and television, radio, and cell phone transmissions are all classed as radio frequency emissions.
Before the advent of television, commercial radio broadcasts included not only news and music, but dramas, comedies, variety shows, and many other forms of entertainment. Radio was unique among dramatic presentation in that it used only sound.
The electromagnetic spectrum, extends from frequencies used in the electric power grid (at the long-wavelength end) to gamma radiation (at the short-wavelength end), covering wavelengths from thousands of kilometres down to fractions of the size of an atom. It is commonly said that EM waves beyond these limits are uncommon, although this is not actually true. The 22-year sunspot cycle, for instance, produces radiation with a period of 22 years, or a frequency of 1.4*10-9 Hz. At the other extreme, photons of arbitrarily high frequency may be produced by colliding electrons with positrons at appropriate energy. 1024 Hz photons can be produced today with man-made accelerators. In our universe the short wavelength limit is likely to be the Planck length, and the long wavelength limit is the size of the universe itself (see physical cosmology), though in principle the spectrum is infinite.
This diagram shows both the position of radio waves in the electromagnetic spectrum as well as how radio waves are used for communication. Photo Credit: User:LadyofHats
WABC AM ("NewsTalkRadio 77") is the flagship station of the ABC Radio Network serving the New York City metropolitan area and is licensed to New York City. The station's transmitter is located in nearby Lodi, New Jersey.
During the 1960s and 1970s, WABC was a highly successful station with its Top 40 format, and was the dominant music station in the New York City area -- reportedly drawing eight million listeners each week at the peak of its success -- and served as a role model for many other Top 40 stations in different cities.
Since the 1980s WABC has had a talk radio format, and is not only the dominant talk radio station in the New York area, but was until recently the most listened to talk radio station in America. WABC is or has been the flagship station for nationally-known radio talkers Rush Limbaugh, Sean Hannity, and John Batchelor.
The following are categories relating to radio:
Radio by country • Radio networks • Radio formats • Radio stations • Radio people • Radio programs • History of radio • Radio drama • Amateur radio • Pirate radio • Types of radios • Radio technology • Radio frequency receivers • Radio hobbies • Radio logos • Radio writers • Years in radio • Military radio systems • Radio astronomy • SETI • Radio-related lists • Radio stubs
The following are lists relating to radio:
97.3 FM • 105.9 FM • BBC Radio 4 programmes • Dad's Army radio episodes • Fictional radio stations • FM broadcasting in Egypt • High school radio • Indie radio stations • Q92 • Q107 • Radio Stations of the BBC • Reith Lecture • Sirius Satellite Radio stations • This American Life episodes • UK radio programmes • World's oldest radio stations • XM Satellite Radio channels • Z103
John Peel, OBE (30 August 1939 – 25 October 2004), was a British disc jockey, radio presenter, and journalist.
He was one of the original DJs of Radio 1 in 1967 and the only one remaining on Radio 1 at the time of his death. Known for the extraordinary range of his taste in music and the occasional mistakes (such as playing records at the wrong speed) that marked his shows, John Peel was one of the most popular and respected DJs and broadcasters in the world. He was one of the first to play reggae and punk on British radio. His profound influence on alternative rock, pop, and dance music is widely acknowledged. The BBC also released albums of his BBC shows, bands like Joy Division, The Fall, Clash. Live and upfront in the BBC studio.
- Radio December 12, 2006 "...to create, expand, and maintain wikipedia articles related to radio, including radio propagation and reception, radio programming, radio personalities, and the business of radio." (Example: Mutual Broadcasting System)
- Amateur Radio August 24, 2006 "...to improve Wikipedia's articles related to Amateur radio, maintain the amateur radio category and its sub-categories for clean organization, and to produce and maintain templates for Amateur radio-related topic identification." (Example: Amateur radio)
- Radio Stations February 15, 2005 "...to coordinate the activities of creating and maintaining articles about radio stations." (Example: KCBS-FM)
- Podcasting January 21, 2007 "...to make Wikipedia's knowledge of notable Podcast and podcast-related information as complete as possible." (Example: Podcast)
