(radio and broadcasting range 3 MHz - 30 MHz)

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• Radio — is the 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… …   Wikipedia

• Radio propagation — is a term used to explain how radio waves behave when they are transmitted, or are propagated from one point on the Earth to another. [ H. P. Westman et al, (ed), Reference Data for Radio Engineers, Fifth Edition , 1968, Howard W. Sams and Co.,… …   Wikipedia

• Radio broadcasting — Long wave radio broadcasting station, Motala, Sweden …   Wikipedia

• Radio clock — A radio clock is a clock that is synchronized by a time code bit stream transmitted by a radio transmitter connected to a time standard such as an atomic clock. Such a clock may be synchronized to the time sent by a single transmitter, such as… …   Wikipedia

• Radio Limerick One — Infobox Radio station name = Radio Limerick one slogan = Closer to you airdate = October, 1989 frequency = Formerly 105.0MHz area = Limerick / Munster format = Pop / Variety/ Chat owner = Gerard Madden website = [http://www.rlotv.com] |Radio… …   Wikipedia

• Radio New Zealand National — Broadcast area New Zealand Frequency …   Wikipedia

• Radio navigation — or radionavigation is the application of radio frequencies to determining a position on the Earth. Like radiolocation, it is a type of radiodetermination.RDF / ADF / NDBThe first system of radio navigation was the Radio Direction Finder, or RDF.… …   Wikipedia

• Radio One (New Zealand) — Radio One (also known simply as The One ) is a student radio station operating from the University of Otago in Dunedin, New Zealand. It broadcasts on a frequency of 91.0 MHz. it is a member of the b.net group of stations, all of which are run… …   Wikipedia

• History of broadcasting — Broadcasting around the World = United States Defining exactly when broadcasting first began is difficult. Very early radio transmissions only carried the dots and dashes of wireless telegraphy. One of the first signals of significant power that… …   Wikipedia

• Radio Scilly — Infobox Radio station name = Scilly Radio airdate = 3 September 2007 frequency = 107.9 MHz area = Isles of Scilly, United Kingdom format = Talk and Music owner = Community Radio website = [http://www.scillyradio.org/ Scilly Radio] Radio Scilly is …   Wikipedia

• Radio Cardiff — Infobox Radio station name = Radio Cardiff city = Butetown, Cardiff, Wales, UKcite web |url=http://www.ofcom.org.uk/static/radiolicensing/Community/CR094.htm |title=CR094 Radio Licensees Community |publisher=Ofcom |accessdate=2008 02 08] area =… …   Wikipedia