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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 limited sound quality. During daytime, only local stations can be received. Propagation in the night allows strong signals within a range of about 2,000 km. This can cause massive interference because on most channels, about 20 to 50 transmitters operate simultaneously worldwide. In addition to that, amplitude modulation (AM) is prone to interference by all sorts of electronic devices, especially power supplies and computers. Strong transmitters cover larger areas than on the FM broadcast band but require more energy. Digital modes are possible but have not reached the momentum yet.
The Gerbrandy Tower is a tower in IJsselstein, the Netherlands. It was built in 1961.
Tallinn TV tower is a free-standing structure with an observation deck, built to provide better telecommunication services for the 1980 Moscow Summer Olympics regatta event. It is located near the suburb Pirita, six km north-east of the Tallinn city center. With its 313 m (1030.2 ft), the TV tower is the tallest nonbuilding structure in Tallinn. The tower was officially opened on 11 July 1980. The viewing platform at a height of 170 metres was open to the public until 26 November 2007, when it was closed for renovation. The tower began receiving visitors again on 5 April 2012. The building is administered by the public company Levira and is a member of the World Federation of Great Towers.
Zendstation Smilde, also known as the CJ2 Data tower is a tall partially guyed tower in Hoogersmilde, the Netherlands, built in 1959, for directional radio services and TV and FM-transmissions. The structure is similar to the Gerbrandy Tower (IJsselstein), and consists of an 80-metre-high reinforced concrete tower and, until a fire accident on July 15, 2011, had a guyed tubular mast mounted on top. When first built, the tower, including the mast, was 270 metres high. The addition of a further section to the mast increased its total height to 303.5 m (996 ft). In September 2007 the analog TV - UHF antenna was removed and replaced by a new UHF antenna for DVB-T, reducing the tower's height to 294 m (965 ft). After rebuilding the collapsed tower in 2012, the new height is 303 metres.
A cell site, cell tower, or cellular base station is a cellular-enabled mobile device site where antennas and electronic communications equipment are placed—typically on a radio mast, tower, or other raised structure—to create a cell in a cellular network. The raised structure typically supports antenna and one or more sets of transmitter/receivers transceivers, digital signal processors, control electronics, a GPS receiver for timing, primary and backup electrical power sources, and sheltering.
A guyed mast or guyed tower is a tall thin vertical structure that depends on guy lines for stability. The mast itself has the compressive strength to support its own weight, but does not have the strength to stand unsupported. It requires guy lines to stay upright and to resist lateral forces such as wind loads. Guy lines are usually spaced at equal angles about the structure's base.
The Mühlacker Broadcasting Transmission Facility is a radio transmission facility near Mühlacker, Germany, first put into service on November 21, 1930. It uses two guyed steel tube masts as aerials and one guyed steel framework mast, which are insulated against ground. It has two transmission aerials for shortwave and one free standing steel framework tower for directional radio services. The shortwave transmitter was shut off on October 19, 2004. The medium wave transmitter was switched off in January 2012.
The Sender Inselsberg is an FM and television-transmission facility on the Großer Inselsberg in Thuringia, Germany. It has two aerial towers, which were built in 1939 and 1974.
The Königs Wusterhausen transmitter was a large transmission facility for longwave, mediumwave and shortwave radio, located near Königs Wusterhausen southeast of Berlin, Germany. Initially built by the telegraph battalion of the German Army, operation began during World War I in 1916. On 22 December 1920, the transmission of a Christmas concert marked the birth of public broadcasting in Germany.
The Mediumwave transmitter Lopik was a medium wave broadcasting facility near Lopik in the Netherlands. It was constructed in 1938 and closed down on 1 September 2015. Its last use was to transmit the Dutch language edition of Radio Maria on 675 kHz. The aerial consisted of a 196-metre guyed steel framework mast, which was insulated against ground.
The mediumwave transmitter Flevoland was a broadcasting facility for medium wave near Zeewolde in the province of Flevoland, Netherlands, situated at 5°25′ E and 52°23′ N. It has been used for broadcasting on 747 kHz and 1008 kHz with a nominal power of 400 kilowatts. As aerial two guyed steel framework masts with a height of 195 metres are used, which form an anti-fading aerial. These masts are grounded and carry a cage aerial, which is upperward the separation insulator, separating the masts in a height of 95 metres in two parts, connected toward the mast construction. The radiation diagram is directional, with a maximum gain of 4 dB in South-Eastern direction, to compensate for the variation in electrical admittance of terrain in the Netherlands.
Radio masts and towers are typically tall structures designed to support antennas for telecommunications and broadcasting, including television. There are two main types: guyed and self-supporting structures. They are among the tallest human-made structures. Masts are often named after the broadcasting organizations that originally built them or currently use them.
A broadcast transmitter is an electronic device which radiates radio waves modulated with information content intended to be received by the general public. Examples are a radio broadcasting transmitter which transmits audio (sound) to broadcast radio receivers (radios) owned by the public, or a television transmitter, which transmits moving images (video) to television receivers (televisions). The term often includes the antenna which radiates the radio waves, and the building and facilities associated with the transmitter. A broadcasting station consists of a broadcast transmitter along with the production studio which originates the broadcasts. Broadcast transmitters must be licensed by governments, and are restricted to specific frequencies and power levels. Each transmitter is assigned a unique identifier consisting of a string of letters and numbers called a callsign, which must be used in all broadcasts.
Arqiva is a British telecommunications company which provides infrastructure, broadcast transmission and smart meter facilities in the United Kingdom. The company headquarters is located at Crawley Court in the village of Crawley, Hampshire, just outside Winchester. Its main customers are broadcasters and utility companies, and its main asset is a network of circa. 1,500 radio and television transmission sites. It is owned by a consortium of investors led by CPP and the Australian investment house Macquarie Bank. Arqiva is a patron of the Radio Academy.
An amateur radio station is a radio station designed to provide radiocommunications in the amateur radio service for an amateur radio operator. Radio amateurs build and operate several types of amateur radio stations, including fixed ground stations, mobile stations, space stations, and temporary field stations. A slang term often used for an amateur station's location is the shack, named after the small enclosures added to the upperworks of naval ships to hold early radio equipment and batteries.
Dillberg transmitter is a transmitting facility of the Bavarian Broadcasting Company on the 595-metre-high Dillberg mountain west of Neumarkt in der Oberpfalz, Bavaria, Germany. Dillberg transmitter went into service in 1955 for serving the area of Nuremberg with TV and FM radio programmes from a 198-metre-tall guyed mast.
The VRT Zendstation Egem is a 305 metres (1,001 ft) tall guyed mast used as a broadcast antenna. It broadcasts the radio and TV programs of the VRT and Q-Music, JOE fm, and Nostalgie Vlaanderen. There are also a number of antennas for mobile communications attached to the mast.
A transmitter station or transmission facility is an installation used for transmitting radio frequency signals for wireless communication, broadcasting, microwave link, mobile telephone or other purposes.
Alticom bv is a Dutch company that owns 30 transmission masts in the Netherlands. It operates as a market leading core communications infrastructure provider in the Netherlands. Alticom offers space on these masts for antennas as well as transmission equipment to operators of telecommunication networks and room within the constructions for the associated equipment and as colocation/data center/backhaul/connectivity.
The Emley Moor transmitting station is a telecommunications and broadcasting facility on Emley Moor, 1 mile (1.6 km) west of the village centre of Emley, between Huddersfield and Wakefield, West Yorkshire, England.
References
- 1 2 3 4 Website NOVEC Key-figures (Dutch), visited 15 February, 2012
- ↑ Report Veilig werken op hoog nivo (save working at a high level),(Dutch) Chapter 2, published: 8 August 2007, Retrieved 15 February, 2012
- ↑ Website Novec: Producten en diensten (Products and services) (Dutch), visited 15 February 2012
- ↑ Novec website Tariff 2012 (Dutch), visited 15 February 2012
- ↑ The Largest Christmas Tree, visited 15 February 2012