Medium wave (MW) is the part of the medium frequency (MF) radio band used mainly for AM radio broadcasting. For Europe the MW band ranges from 526.5 kHz to 1606.5 kHz, using channels spaced every 9 kHz, and in North America an extended MW broadcast band ranges from 525 kHz to 1705 kHz, using 10 kHz spaced channels. The term is a historic one, dating from the early 20th century, when the radio spectrum was divided on the basis of the wavelength of the waves into long wave (LW), medium wave, and short wave (SW) radio bands.
The Blosenbergturm is a former radio transmission tower built for the German-language radio station DRS at Beromünster in the Canton of Lucerne, Switzerland, in 1937. It radiated at 531 kHz, the lowest officially allocated frequency in the European medium-wave band.
WLW, branded "Newsradio 700 WLW", is a commercial news/talk radio station serving Greater Cincinnati. Owned by iHeartMedia, the station's studios are located in Sycamore Township, and its transmitter is at Mason, Ohio. One of the oldest radio stations in the United States, in the 1930s it was also the only U.S. station ever authorized to broadcast with a power of 500,000 watts.
The Crystal Palace transmitting station, officially known as Arqiva Crystal Palace, is a broadcasting and telecommunications site in the Crystal Palace area of the London Borough of Bromley, England. It is located on the site of the former television station and transmitter, operated by John Logie Baird, from 1933.
Grimeton Radio Station in southern Sweden, close to Varberg in Halland, is an early longwave transatlantic wireless telegraphy station built in 1922-1924, that has been preserved as a historical site. From the 1920s through the 1940s it was used to transmit telegram traffic by Morse code to North America and other countries, and during World War 2 was Sweden's only telecommunication link with the rest of the world. It is the only remaining example of an early pre-electronic radio transmitter technology called an Alexanderson alternator. It was added to the UNESCO World Heritage List in 2004, with the statement: "Grimeton Radio Station, Varberg is an outstanding monument representing the process of development of communication technology in the period following the First World War." The radio station is also an anchor site for the European Route of Industrial Heritage. The transmitter is still in operational condition, and each year on a day called Alexanderson Day is started up and transmits brief Morse code test transmissions, which can be received all over Europe.
A broadcast transmitter is a transmitter used for broadcasting, 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.
The Wenvoe transmitting station is a facility for broadcasting and telecommunications situated close to the village of Wenvoe in the Vale of Glamorgan, Wales, in the UK. It comprises a 260.7-metre (855 ft) guyed mast with antennas attached at various heights. The mast plus the Main UHF (TV) antenna on top gives a height of 260.7 metres (869 ft). The average height above sea level is 392 metres for the television antennas. It is owned and operated by Arqiva. The mast sways 10 feet, or 4 meters, which is quite high for a mast this size. As of 31/05/2019, 5G was launched on the Wenvoe Transmitter on EE. The 4G services were also upgraded, from Double Speed 4GEE to 4G+ with an extra 10MHz of bandwidth being added with this upgrade.
4MMM a commercial FM rock radio station in Brisbane, Australia. It broadcasts on the Triple M network on 104.5 MHz frequency.
A radio repeater is a combination of a radio receiver and a radio transmitter that receives a signal and retransmits it, so that two-way radio signals can cover longer distances. A repeater sited at a high elevation can allow two mobile stations, otherwise out of line-of-sight propagation range of each other, to communicate. Repeaters are found in professional, commercial, and government mobile radio systems and also in amateur radio.
WRNR-FM is a commercial radio station licensed to Grasonville, Maryland, broadcasting mainly to the Annapolis / Anne Arundel County area and the Eastern Shore of Maryland on 103.1 FM. WRNR-FM airs an adult album alternative music format.
The Ontario Parliament Network is a television channel in the Canadian province of Ontario, established in 1986 to broadcast the parliamentary proceedings of the Legislative Assembly of Ontario. It is available on all cable television providers in Ontario, as well as by webcast.
An umbrella antenna is a top-loaded electrically lengthened monopole antenna, consisting in most cases of a mast fed at the ground end, to which a number of radial wires are connected at the top, sloping downwards. They are used as transmitting antennas below 1 MHz, in the LF and particularly the VLF bands, at frequencies sufficiently low that it is impractical or infeasible to build a full size quarter-wave monopole antenna. The outer end of each radial wire, sloping down from the top of the antenna, is connected by an insulator to a supporting rope or (usually) insulated cable anchored to the ground; the radial wires can also support the mast as guy wires. The radial wires make the antenna look like the frame of a giant umbrella – without the cloth – hence the name.
WMIT is a non-profit FM radio station licensed to Black Mountain, North Carolina. WMIT is a listener-supported ministry of the Billy Graham Evangelistic Association. It airs a mix of Contemporary Christian music with some Christian talk and teaching programs, including national religious leaders Jim Daly, John MacArthur, David Jeremiah, Chuck Swindoll and Charles Stanley. Studios and offices are on Porters Cove Road in Asheville. WMIT's tower rises 180 feet (55 m) above 6,557-foot (1,999 m) Clingman's Peak.
KOBR, virtual and VHF digital channel 8, is an NBC-affiliated television station licensed to Roswell, New Mexico, United States and also serving Carlsbad. It is a satellite of KOB in Albuquerque which is owned by Hubbard Broadcasting. KOBR's transmitter is located near Caprock, New Mexico. KOBF in Farmington also serves as a satellite of KOB. These satellite operations provide additional news bureaus for KOB and sell advertising time to local sponsors.
Radio is the technology of signaling or communicating using radio waves. Radio waves are electromagnetic waves of frequency between 30 hertz (Hz) and 300 gigahertz (GHz). They are generated by an electronic device called a transmitter connected to an antenna which radiates the waves, and received by a radio receiver connected to another antenna. Radio is very widely used in modern technology, in radio communication, radar, radio navigation, remote control, remote sensing and other applications. In radio communication, used in radio and television broadcasting, cell phones, two-way radios, wireless networking and satellite communication among numerous other uses, radio waves are used to carry information across space from a transmitter to a receiver, by modulating the radio signal in the transmitter. In radar, used to locate and track objects like aircraft, ships, spacecraft and missiles, a beam of radio waves emitted by a radar transmitter reflects off the target object, and the reflected waves reveal the object's location. In radio navigation systems such as GPS and VOR, a mobile receiver receives radio signals from navigational radio beacons whose position is known, and by precisely measuring the arrival time of the radio waves the receiver can calculate its position on Earth. In wireless radio remote control devices like drones, garage door openers, and keyless entry systems, radio signals transmitted from a controller device control the actions of a remote device.
Fazilka TV Tower, often nicknamed the Fazilka Eiffel Tower, is a 304.8 m (1,000 ft) tall Indian lattice tower at Fazilka, Punjab, India, which is used for FM-/TV-broadcasting in the whole of Punjab. The tower is currently the forty-fourth in the world and the second tallest man-made structure in India.
Tower of Power is a 777 ft (236.8 m), 100,000 watt TPO communications tower of GMA Network located in Tandang Sora, Barangay Culiat, Quezon City. It serves as a transmitter facility for GMA's flagship stations: the main channel's DZBB-TV 7, GMA News TV's DWDB-TV 27, and Barangay FM's DWLS 97.1 MHz.
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, in Kirklees, West Yorkshire, England, made up of a 1,084-foot-tall (330.4 m) concrete tower and apparatus which began transmitting in 1971. It is protected under UK law as a Grade II listed building. It is the tallest freestanding structure in the United Kingdom, seventh-tallest freestanding structure and fourth-tallest tower in Europe outside Russia, and 24th-tallest tower in the world.
Divis transmitting station is the main high-power UHF and BBC National FM/DAB station that serves County Antrim and parts of County Down.
NAA was a major radio facility, located in Arlington, Virginia from 1913 until 1941 and operated by the United States Navy. The station was originally constructed as the first link in a network of high-powered transmitters used for international communication. During its years of operation NAA was best known for broadcasting daily time signals, however, it also provided a variety of additional services, using multiple transmitters operating on frequencies ranging from longwave to shortwave. The station also conducted extensive experimental work, including, in 1915, the first transatlantic transmission of speech.
