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Brookmans Park Transmitting Station
The Brookmans Park transmitting station is a facility for medium wave (MW) broadcasting at Brookmans Park, Hertfordshire, north of London (). The station was built in the 1920s by the BBC as the first of a network of regional dual ("twin wave" was the term then used) transmitter stations, replacing the city-based ones used previously, and this was to cover the Home Counties, London and South East. The station is now owned by Arqiva and transmits BBC Radio 5 Live, talkSPORT, Absolute Radio and Lyca Radio. History The first station, on 842 kHz, (356m) 50 kW, went into service in on 21 October 1929, the second on 1,148 kHz, (261m) initially 30 kW, followed on 9 March 1930. The original antenna configuration for the station was two T-antennas hung from four 200 ft (61m) towers, one T-antenna to the north of the station and the other to the south of the station. Shortly after the commencement of transmissions, the channels were identified by a name denotin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Medium Wave
Medium wave (MW) is the part of the medium frequency (MF) radio band used mainly for AM radio broadcasting. The spectrum provides about 120 channels with more limited sound quality than FM stations on the FM broadcast band. During the daytime, reception is usually limited to more local stations, though this is dependent on the signal conditions and quality of radio receiver used. Improved signal propagation at night allows the reception of much longer distance signals (within a range of about 2,000 km or 1,200 miles). This can cause increased interference because on most channels multiple transmitters operate simultaneously worldwide. In addition, amplitude modulation (AM) is often more prone to interference by various electronic devices, especially power supplies and computers. Strong transmitters cover larger areas than on the FM broadcast band but require more energy and longer antennas. Digital modes are possible but have not reached momentum yet. MW was the main radio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
BBC Light Programme
The BBC Light Programme was a national radio station which broadcast chiefly mainstream light entertainment and light music from 1945 until 1967, when it was replaced by BBC Radio 2 and BBC Radio 1. It opened on 29 July 1945, taking over the long wave frequency which had earlier been used – prior to the outbreak of the Second World War on 1 September 1939 – by the National Programme. The service was intended as a domestic replacement for the wartime General Forces Programme which had gained many civilian listeners in Britain as well as members of the British Armed Forces. History The long wave signal on 200 kHz/1500 metres was transmitted from Droitwich in the English Midlands (as it still is today for BBC Radio 4, although adjusted slightly to 198 kHz/1515 metres from 1 February 1988) and gave fairly good coverage of most of the United Kingdom, although a number of low-power medium wave transmitters (using 1214 kHz/247 metres) were added later to fill ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Transmitter Sites In England
In electronics and telecommunications, a radio transmitter or just transmitter is an electronic device which produces radio waves with an antenna. The transmitter itself generates a radio frequency alternating current, which is applied to the antenna. When excited by this alternating current, the antenna radiates radio waves. Transmitters are necessary component parts of all electronic devices that communicate by radio, such as radio and television broadcasting stations, cell phones, walkie-talkies, wireless computer networks, Bluetooth enabled devices, garage door openers, two-way radios in aircraft, ships, spacecraft, radar sets and navigational beacons. The term ''transmitter'' is usually limited to equipment that generates radio waves for communication purposes; or radiolocation, such as radar and navigational transmitters. Generators of radio waves for heating or industrial purposes, such as microwave ovens or diathermy equipment, are not usually called transmitter ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Radio Stations In The United Kingdom
This is a list of radio stations in the United Kingdom. National analogue and digital (DAB) stations This list does not include stations which broadcast on numerous local digital multiplexes or MW licences to achieve near-national coverage. DAB frequencies: * 11A - radio stations operated under the Sound Digital multiplex * 11D / 12A - radio stations operated under the Digital One multiplex, 12A in Scotland and 11D in the rest of the UK * 12B - radio stations operated under the BBC National DAB multiplex National digital (DAB+) stations ''List of stations on the Digital One and Sound Digital multiplexes broadcasting in the newer DAB+ Digital Radio standard'' DAB frequencies: * 11A - radio stations operated under the Sound Digital multiplex * 11D / 12A - radio stations operated under the Digital One multiplex, 12A in Scotland and 11D in the rest of the UK Semi-national analogue and digital (DAB) stations Stations which are available nationally on Freeview and/or satell ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Towers
Several extant building fulfill the engineering definition of a tower: "a tall human structure, always taller than it is wide, for public or regular operational access by humans, but not for living in or office work, and are ''self-supporting'' or ''free-standing'', which means no guy-wires for support." This definition excludes continuously habitable buildings and skyscrapers as well as radio and TV masts. Also excluded because they are not designed for public or regular operational access are bridge towers or pylons, wind turbines, chimneys, transmission towers, sculptures and most large statues and obelisks. Towers are most often built to use their height for various purposes, and can stand alone or as part of a larger structure. Some common purposes are for telecommunications, and as a viewing platform. The Tokyo Skytree, completed in February 2012, is , making it the tallest tower, and third-tallest free-standing structure in the world. Entirely self-supported t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Masts
The tallest structure in the world is the Burj Khalifa skyscraper at . Listed are guyed masts (such as telecommunication masts), self-supporting towers (such as the CN Tower), skyscrapers (such as the Willis Tower), oil platforms, electricity transmission towers, and bridge support towers. This list is organized by absolute height. See List of tallest buildings and structures, List of tallest freestanding structures and List of tallest buildings and List of tallest towers for additional information about these types of structures. Terminology Terminological and listing criteria follow Council on Tall Buildings and Urban Habitat definitions. Guyed masts are differentiated from towers – the latter not featuring any guy wires or other support structures; and buildings are differentiated from towers – the former having at least 50% of occupiable floor space although both are self-supporting structures. List by height This list includes structures with a minimum height o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Digital One
Digital One is a national commercial digital radio multiplex in the United Kingdom, owned by Arqiva. , the multiplex covered more than 90% of the population from 137 transmitters. Coverage was extended to Northern Ireland in July 2013. It contains a list of DAB and DAB+ radio stations operated by Bauer Media Audio UK, Global and Wireless Group. Stations carried DAB DAB+ History On 24 March 1998, the Radio Authority advertised for the first national ensemble to be broadcast on DAB, with the three national commercial services on FM and medium wave required to be included in the ensemble. This included Classic FM, Talk Radio UK (now Talksport) and Virgin Radio (now Absolute Radio). The licence was awarded to the sole applicant, GWR Group and NTL Broadcast to form Digital One. The original licence application included the following stations: Digital One was due to launch on 1 October 1999, but this was postponed until 15 November 1999. The "Classic Gold Rock" servic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
DRG London
DRG London is a Digital Audio Broadcasting multiplex available in the London area that has been broadcasting since January 2002. It is also referred to as the Greater London 3 multiplex. The station operates from ten transmitters: Croydon, Alexandra Palace, Blue Bell Hill, Reigate, Guildford, Brookmans Park, Zouches Farm, BT Bedmont, High Wycombe and Kemsing. The Kemsing site (2 kW) was replaced in 2010 by the more powerful Wrotham site (5 kW) in Kent. Stations available See also * CE London * Switch London Switch London is a DAB ensemble operated by Switchdigital; it broadcasts from a variety of sites in and around London (Alexandra Palace, Arkley, Bluebell Hill, BT Tower, Colindale House, Crystal Palace, Guildford, Hampstead, Harrow Weald, Hemel ... References External links Technical informationCoverage mapDRG's website {{DEFAULTSORT:Drg London Digital audio broadcasting multiplexes ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
BBC Home Service
The BBC Home Service was a national and regional radio station that broadcast from 1939 until 1967, when it was replaced by BBC Radio 4. History 1922–1939: Interwar period Between the early 1920s and the outbreak of World War II, the BBC developed two nationwide radio stations – the National Programme and the Regional Programme (which were begun broadcasting on 9 March 1930) – as well as a basic service from London that include programming originated in six regions. Although the programme items attracting the greatest number of listeners tended to appear on the National, the two services were not streamed: they were each designed to appeal "across the board" to a single but variegated audience by offering between them and at most times of the day a choice of programme type rather than simply catering, each of them exclusively, to two distinct audiences. 1939–1945: World War II On 1 September 1939, the BBC merged the two programmes into one national service from Lo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Standard Telephones And Cables
Standard Telephones and Cables Ltd (later STC plc) was a British manufacturer of telephone, telegraph, radio, telecommunications, and related equipment. During its history, STC invented and developed several groundbreaking new technologies including pulse-code modulation (PCM) and optical fibres. The company was founded in 1883 in London as International Western Electric by the Western Electric Company, shortly after Western Electric became the telephone equipment supplier for the American Telephone and Telegraph Company (AT&T) in the United States. In 1925, Western Electric divested itself of all foreign operations and sold International Western Electric to International Telephone and Telegraph (ITT), in part to thwart antitrust actions by the American government. In mid-1982, STC became an independent company and was listed on the London Stock Exchange; for a time it was a constituent of the FTSE 100 Index. It was bought by Nortel in 1991. History Early days The company wa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Directional Array
An antenna array (or array antenna) is a set of multiple connected antennas which work together as a single antenna, to transmit or receive radio waves. The individual antennas (called ''elements'') are usually connected to a single receiver or transmitter by feedlines that feed the power to the elements in a specific phase relationship. The radio waves radiated by each individual antenna combine and superpose, adding together ( interfering constructively) to enhance the power radiated in desired directions, and cancelling ( interfering destructively) to reduce the power radiated in other directions. Similarly, when used for receiving, the separate radio frequency currents from the individual antennas combine in the receiver with the correct phase relationship to enhance signals received from the desired directions and cancel signals from undesired directions. More sophisticated array antennas may have multiple transmitter or receiver modules, each connected to a separate an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Brookmans Park
Brookmans Park is a village in Hertfordshire, southeast England, known for its BBC transmitter station. Brookmans Park railway station, on the East Coast Main Line, is operated by Great Northern. It is also a waypoint used in air navigation by Heathrow Airport. History Miss Muffet Local legend has it that "Little Miss Muffet" of the nursery rhyme was Patience Moffat, daughter of entomologist Dr. Thomas Moffat (possibly Moffett or Moufet), who lived in the area from 1553 to 1604 on a farm. He had invited a poet over for Christmas. During his stay he overheard Miss Moffat tell her father of how she was eating her curds and whey when a spider came down from the ceiling and frightened her. The poet made an alteration to the name Miss Moffat and wrote the rhyme. However, the traceable origins of the rhyme are murky, as it did not appear in a printed version until 1805. The local connection is celebrated by the inclusion of a spider's web in the badge of Brookmans Park School. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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