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Athlone Transmitting Station
The Athlone transmitting station is a decommissioned AM radio transmission site in the townland of Moydrum, near the town of Athlone, County Westmeath, Ireland. The site is notable for being displayed on European valve radios at the time. History The Athlone transmitter was brought into service in 1932 for that year's Eucharistic Congress in Dublin as Radio Athlone (later Radio Éireann). It was switched off after the event to allow for completion of the site and reopened on 6 February 1933 at 60 kW ERP with a water-cooled Marconi transmitter; later uprated to 100 kW. A T-aerial was used, which was suspended between two 300 ft masts. The Marconi transmitter was replaced around 1958 with an air-cooled Brown Boveri transmitter, also rated at 100 kW ERP. In 1975, a new site near Tullamore in County Offaly replaced the Athlone transmitter. The transmitter at Tullamore was capable of up to 500 kW ERP. Athlone was brought back into service from 1979 to carry R ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
AM Radio
AM broadcasting is radio broadcasting using amplitude modulation (AM) transmissions. It was the first method developed for making audio radio transmissions, and is still used worldwide, primarily for medium wave (also known as "AM band") transmissions, but also on the longwave and shortwave radio bands. The earliest experimental AM transmissions began in the early 1900s. However, widespread AM broadcasting was not established until the 1920s, following the development of vacuum tube receivers and transmitters. AM radio remained the dominant method of broadcasting for the next 30 years, a period called the " Golden Age of Radio", until television broadcasting became widespread in the 1950s and received most of the programming previously carried by radio. Subsequently, AM radio's audiences have also greatly shrunk due to competition from FM (frequency modulation) radio, Digital Audio Broadcasting (DAB), satellite radio, HD (digital) radio, Internet radio, music streaming servi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Brown Boveri
Brown, Boveri & Cie. (Brown, Boveri & Company; BBC) was a Swiss group of electrical engineering companies. It was founded in Zürich, in 1891 by Charles Eugene Lancelot Brown and Walter Boveri who worked at the Maschinenfabrik Oerlikon. In 1970 BBC took over the Maschinenfabrik Oerlikon. In 1988 it merged with ASEA to form ABB. Early History of BBC Brown Boveri BBC Brown Boveri was established in 1891. The company was one of only a few multinational corporations to operate subsidiaries that were larger than the parent company. Because of the limitations of the Swiss domestic market, Brown Boveri established subsidiaries throughout Europe relatively early in its history, and at times had difficulty maintaining managerial control over some of its larger operating units. The merger with ASEA, a company which was praised for its strong management, was expected to help Brown Boveri reorganize and reassert control over its vast international network. Activity in Britain Brown Boveri' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Radio Masts And Towers In Europe
Radio is the technology of signaling and 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 another antenna connected to a radio receiver. 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 (impressing an information signal on the radio wave by varying some aspect of the wave) in the transmitter. In radar, used to locate and track objects like aircraft, ships, spacecraft an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Buildings And Structures In County Westmeath
A building, or edifice, is an enclosed structure with a roof and walls standing more or less permanently in one place, such as a house or factory (although there's also portable buildings). Buildings come in a variety of sizes, shapes, and functions, and have been adapted throughout history for a wide number of factors, from building materials available, to weather conditions, land prices, ground conditions, specific uses, prestige, and aesthetic reasons. To better understand the term ''building'' compare the list of nonbuilding structures. Buildings serve several societal needs – primarily as shelter from weather, security, living space, privacy, to store belongings, and to comfortably live and work. A building as a shelter represents a physical division of the human habitat (a place of comfort and safety) and the ''outside'' (a place that at times may be harsh and harmful). Ever since the first cave paintings, buildings have also become objects or canvasses of much artistic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Westmeath Independent
The ''Westmeath Independent'' is a local newspaper serving County Westmeath, Ireland. It is based in the town of Athlone. Publication is weekly on Wednesdays. It is owned by Celtic Media Group Celtic Media Group provides publishing, printing and pre-press (graphic design) services to the Irish newspaper sector. It also has a digital consultancy service. It is owned by its Irish management team, following a management buy-out led b .... Circulation as of 2012 was 7726. References External links * Athlone Mass media in County Westmeath Newspapers published in the Republic of Ireland Publications with year of establishment missing Weekly newspapers published in Ireland {{Ireland-newspaper-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wavelength
In physics, the wavelength is the spatial period of a periodic wave—the distance over which the wave's shape repeats. It is the distance between consecutive corresponding points of the same phase on the wave, such as two adjacent crests, troughs, or zero crossings, and is a characteristic of both traveling waves and standing waves, as well as other spatial wave patterns. The inverse of the wavelength is called the spatial frequency. Wavelength is commonly designated by the Greek letter ''lambda'' (λ). The term ''wavelength'' is also sometimes applied to modulated waves, and to the sinusoidal envelopes of modulated waves or waves formed by interference of several sinusoids. Assuming a sinusoidal wave moving at a fixed wave speed, wavelength is inversely proportional to frequency of the wave: waves with higher frequencies have shorter wavelengths, and lower frequencies have longer wavelengths. Wavelength depends on the medium (for example, vacuum, air, or water) that a wav ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hertz
The hertz (symbol: Hz) is the unit of frequency in the International System of Units (SI), equivalent to one event (or cycle) per second. The hertz is an SI derived unit whose expression in terms of SI base units is s−1, meaning that one hertz is the reciprocal of one second. It is named after Heinrich Rudolf Hertz (1857–1894), the first person to provide conclusive proof of the existence of electromagnetic waves. Hertz are commonly expressed in multiples: kilohertz (kHz), megahertz (MHz), gigahertz (GHz), terahertz (THz). Some of the unit's most common uses are in the description of periodic waveforms and musical tones, particularly those used in radio- and audio-related applications. It is also used to describe the clock speeds at which computers and other electronics are driven. The units are sometimes also used as a representation of the energy of a photon, via the Planck relation ''E'' = ''hν'', where ''E'' is the photon's energy, ''ν'' is its freq ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Radiowaves
Radio waves are a type of electromagnetic radiation with the longest wavelengths in the electromagnetic spectrum, typically with frequencies of 300 gigahertz (GHz) and below. At 300 GHz, the corresponding wavelength is 1 mm (shorter than a grain of rice); at 30 Hz the corresponding wavelength is (longer than the radius of the Earth). Like all electromagnetic waves, radio waves in a vacuum travel at the speed of light, and in the Earth's atmosphere at a close, but slightly lower speed. Radio waves are generated by charged particles undergoing acceleration, such as time-varying electric currents. Naturally occurring radio waves are emitted by lightning and astronomical objects, and are part of the blackbody radiation emitted by all warm objects. Radio waves are generated artificially by an electronic device called a transmitter, which is connected to an antenna which radiates the waves. They are received by another antenna connected to a radio receiver, whi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Continental Electronics
Continental Electronics is an American manufacturer of broadcast and military radio transmitters, based in Dallas, Texas. Although Continental today is best known for its FM, shortwave, and military VLF transmitters, Continental is most significant historically for its line of mediumwave ( AM) transmitters, many of which are still in active service as either main transmitters or backup facilities. Among clear-channel AM stations in the U.S. and Canada, the Continental 317C was the most popular transmitter type in the 1970s and 1980s. History Continental Electronics was founded in Dallas in 1946 by James O. Weldon, as a spin-off of the broadcast consulting business in which he was a partner, Weldon & Carr. In 1953, when Western Electric's radio equipment business was broken up by Federal antitrust regulators, Continental acquired the AM transmitter business, and with it the U.S. patent on the Doherty linear RF amplifier. Continental became part of Ling-Temco-Vought in a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
RTÉ 2fm
(RTÉ) (; Irish for "Radio & Television of Ireland") is the national broadcaster of Ireland headquartered in Dublin. It both produces and broadcasts programmes on television, radio and online. The radio service began on 1 January 1926, while regular television broadcasts began on 31 December 1961, making it one of the oldest continuously operating public service broadcasters in the world. RTÉ also publishes a weekly listings and lifestyle magazine, the ''RTÉ Guide''. RTÉ is a statutory body, overseen by a board appointed by the Government of Ireland, with general management in the hands of the Executive Board, headed by the Director-General. RTÉ is regulated by the Broadcasting Authority of Ireland. RTÉ is financed by television licence fee and through advertising, with some of its services funded solely by advertising, while others are funded solely by the licence fee. Radio Éireann, RTÉ's predecessor and at the time a section of the Department of Posts and Telegraphs ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
County Offaly
County Offaly (; ga, Contae Uíbh Fhailí) is a county in Ireland. It is part of the Eastern and Midland Region and the province of Leinster. It is named after the ancient Kingdom of Uí Failghe. It was formerly known as King's County, in honour of Philip II of Spain. Offaly County Council is the local authority for the county. The county population was 82,668 at the 2022 census. Central Statistics Office figures Geography and political subdivisions Offaly is the 18th largest of Ireland's 32 counties by area and the 24th largest in terms of population. It is the fifth largest of Leinster's 12 counties by size and the 10th largest by population.Physical geography [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tullamore Transmitter
Tullamore (; ) is the county town of County Offaly in Ireland. It is on the Grand Canal, in the middle of the county, and is the fourth most populous town in the midlands region with 14,607 inhabitants at the 2016 census. The town retained Gold Medal status in the National Tidy Town Awards in 2015 and also played host to the World Sheep Dog Trials in 2005 which attracted international interest in the region. The Tullamore Show is held near the town every year. The town's most famous export is Tullamore Dew – an Irish whiskey distilled by Tullamore Distillery – that can be traced back to 1829. The original distillery was shut down in 1954, with the brand later being resurrected and produced at the Midleton Distillery, in Cork. However, the brand's new owners, William Grant & Sons, invested in a new distillery near Tullamore, bringing whiskey production back to the town in 2014. History In the Middle Ages, Tullamore was within the Gaelic territory of Fir ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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