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Radio K
KUOM (770 AM) – branded ''Radio K'' – is a daytime-only non-commercial educational college/alternative rock radio station licensed to serve Minneapolis, Minnesota. KUOM covers the Minneapolis–Saint Paul metropolitan area, and extends its reach with three low-power broadcast relay stations and one full-power repeater that also allow KUOM's programming to be heard 24 hours a day. Owned by the University of Minnesota, Twin Cities, the station is operated by both faculty and students. The KUOM studios are located at the Rarig Center on the University of Minnesota campus, while the station transmitter is in Falcon Heights. Besides a standard analog transmission, KUOM is also available online. KUOM's AM signal operates with a non-directional antenna located on the St. Paul/ Falcon Heights campus. Due to its 770 kHz frequency located low on the band combined with the region's flat terrain and excellent soil conductivity, the station's AM coverage is comparable to that of a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Minneapolis, Minnesota
Minneapolis () is the largest city in Minnesota, United States, and the county seat of Hennepin County. The city is abundant in water, with thirteen lakes, wetlands, the Mississippi River, creeks and waterfalls. Minneapolis has its origins in timber and as the flour milling capital of the world. It occupies both banks of the Mississippi River and adjoins Saint Paul, the state capital of Minnesota. Prior to European settlement, the site of Minneapolis was inhabited by Dakota people. The settlement was founded along Saint Anthony Falls on a section of land north of Fort Snelling; its growth is attributed to its proximity to the fort and the falls providing power for industrial activity. , the city has an estimated 425,336 inhabitants. It is the most populous city in the state and the 46th-most-populous city in the United States. Minneapolis, Saint Paul and the surrounding area are collectively known as the Twin Cities. Minneapolis has one of the most extensive public ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Broadcast Relay Station
A broadcast relay station, also known as a satellite station, relay transmitter, broadcast translator (U.S.), re-broadcaster (Canada), repeater ( two-way radio) or complementary station (Mexico), is a broadcast transmitter which repeats (or transponds) the signal of a radio or television station to an area not covered by the originating station. It expands the broadcast range of a television or radio station beyond the primary signal's original coverage or improves service in the original coverage area. The stations may be (but are not usually) used to create a single-frequency network. They may also be used by an AM or FM radio station to establish a presence on the other band. Relay stations are most commonly established and operated by the same organisations responsible for the originating stations they repeat. However, depending on technical and regulatory restrictions, relays may also be set up by unrelated organisations. Types Broadcast translators In its simplest f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
University Of Iowa
The University of Iowa (UI, U of I, UIowa, or simply Iowa) is a public research university in Iowa City, Iowa, United States. Founded in 1847, it is the oldest and largest university in the state. The University of Iowa is organized into 12 colleges offering more than 200 areas of study and seven professional degrees. On an urban 1,880-acre campus on the banks of the Iowa River, the University of Iowa is classified among "R1: Doctoral Universities – Very high research activity". In fiscal year 2021, research expenditures at Iowa totaled $818 million. The university is best known for its programs in health care, law, and the fine arts, with programs ranking among the top 25 nationally in those areas. The university was the original developer of the Master of Fine Arts degree and it operates the Iowa Writers' Workshop, which has produced 17 of the university's 46 Pulitzer Prize winners. Iowa is a member of the Association of American Universities, the Universities Research ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Morse Code
Morse code is a method used in telecommunication to encode text characters as standardized sequences of two different signal durations, called ''dots'' and ''dashes'', or ''dits'' and ''dahs''. Morse code is named after Samuel Morse, one of the inventors of the telegraph. International Morse code encodes the 26 basic Latin letters through , one accented Latin letter (), the Arabic numerals, and a small set of punctuation and procedural signals ( prosigns). There is no distinction between upper and lower case letters. Each Morse code symbol is formed by a sequence of ''dits'' and ''dahs''. The ''dit'' duration is the basic unit of time measurement in Morse code transmission. The duration of a ''dah'' is three times the duration of a ''dit''. Each ''dit'' or ''dah'' within an encoded character is followed by a period of signal absence, called a ''space'', equal to the ''dit'' duration. The letters of a word are separated by a space of duration equal to three ''dits' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spark-gap Transmitter
A spark-gap transmitter is an obsolete type of radio transmitter which generates radio waves by means of an electric spark."Radio Transmitters, Early" in Spark-gap transmitters were the first type of radio transmitter, and were the main type used during the wireless telegraphy or "spark" era, the first three decades of radio, from 1887 to the end of World War I. German physicist Heinrich Hertz built the first experimental spark-gap transmitters in 1887, with which he proved the existence of radio waves and studied their properties. A fundamental limitation of spark-gap transmitters is that they generate a series of brief transient pulses of radio waves called damped waves; they are unable to produce the continuous waves used to carry audio (sound) in modern AM or FM radio transmission. So spark-gap transmitters could not transmit audio, and instead transmitted information by radiotelegraphy; the operator switched the transmitter on and off with a telegraph key, creating puls ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Telegraphy
Telegraphy is the long-distance transmission of messages where the sender uses symbolic codes, known to the recipient, rather than a physical exchange of an object bearing the message. Thus flag semaphore is a method of telegraphy, whereas pigeon post is not. Ancient signalling systems, although sometimes quite extensive and sophisticated as in China, were generally not capable of transmitting arbitrary text messages. Possible messages were fixed and predetermined and such systems are thus not true telegraphs. The earliest true telegraph put into widespread use was the optical telegraph of Claude Chappe, invented in the late 18th century. The system was used extensively in France, and European nations occupied by France, during the Napoleonic era. The electric telegraph started to replace the optical telegraph in the mid-19th century. It was first taken up in Britain in the form of the Cooke and Wheatstone telegraph, initially used mostly as an aid to railway signalling ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Oldest Radio Stations
It is generally recognised that the first radio transmission was made from a temporary station set up by Guglielmo Marconi in 1895. This followed on from pioneering work in the field by a number of people including Alessandro Volta, André-Marie Ampère, Georg Ohm and James Clerk Maxwell.Mimi Colligan, ''Golden Days of Radio'', Australia Post, 1991 The several potential contenders for the title of "oldest radio station" are listed below, organized by sign-on date. These are not restricted to radio broadcasting, i.e., the transmissions were not necessarily intended to reach a wide audience. Stations AM on Mediumwave and Longwave FM or Shortwave Networks See also * History of radio * Timeline of radio * History of broadcasting *AM broadcasting ** Extended AM broadcast band *FM broadcasting ** FM broadcasting in the USA **List of the initial commercial FM station assignments issued by the Federal Communications Commission on October 31, 1940 * * Oldest television statio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
WABC (AM)
WABC (770 AM) is a commercial radio station licensed to New York, New York, carrying a conservative talk format known as "Talkradio 77". Owned by John Catsimatidis' Red Apple Media, the station's studios are located in Red Apple Media headquarters on Third Avenue in Midtown Manhattan and its transmitter is in Lodi, New Jersey. Its 50,000-watt non-directional clear channel signal can be heard at night throughout much of the Eastern United States and Canada. It is the primary entry point for the Emergency Alert System in the New York metropolitan area and New Jersey. WABC simulcasts on WLIR-FM in Hampton Bays, New York, on eastern Long Island. Owned and operated by the American Broadcasting Company for much of its history, it is one of the country's oldest radio stations. WABC began broadcasting in early October 1921, originally as WJZ in Newark, New Jersey. From 1943 through 2007, the station served as the flagship for the original ABC Radio Network (and its direct pr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mankato
Mankato ( ) is a city in Blue Earth, Nicollet, and Le Sueur counties in the state of Minnesota. The population was 44,488 according to the 2020 census, making it the 21st-largest city in Minnesota, and the 5th-largest outside of the Minneapolis–Saint Paul metropolitan area. It is along a large bend of the Minnesota River at its confluence with the Blue Earth River. Mankato is across the Minnesota River from North Mankato. Mankato and North Mankato have a combined population of 58,763 according to the 2020 census. It completely encompasses the town of Skyline. North of Mankato Regional Airport, a tiny non-contiguous part of the city lies within Le Sueur County. Most of the city is in Blue Earth County. Mankato is the larger of the two principal cities of the Mankato-North Mankato metropolitan area, which covers Blue Earth and Nicollet Counties and had a combined population of 103,566 at the 2020 census. The U.S. Census Bureau designated Mankato a Metropolitan Statistica ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Omnidirectional Antenna
In radio communication, an omnidirectional antenna is a class of antenna which radiates equal radio power in all directions perpendicular to an axis (azimuthal directions), with power varying with angle to the axis ( elevation angle), declining to zero on the axis. When graphed in three dimensions ''(see graph)'' this radiation pattern is often described as ''doughnut-shaped''. Note that this is different from an isotropic antenna, which radiates equal power in ''all'' directions, having a ''spherical'' radiation pattern. Omnidirectional antennas oriented vertically are widely used for nondirectional antennas on the surface of the Earth because they radiate equally in all horizontal directions, while the power radiated drops off with elevation angle so little radio energy is aimed into the sky or down toward the earth and wasted. Omnidirectional antennas are widely used for radio broadcasting antennas, and in mobile devices that use radio such as cell phones, FM radios, wa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Analog Transmission
Analog transmission is a transmission method of conveying information using a continuous signal which varies in amplitude, phase, or some other property in proportion to that information. It could be the transfer of an analog signal, using an analog modulation method such as frequency modulation (FM) or amplitude modulation (AM), or no modulation at all. Some textbooks also consider passband data transmission using a digital modulation method such as ASK, PSK and QAM, i.e. a sinewave modulated by a digital bit-stream, as analog transmission and as an analog signal. Others define that as digital transmission and as a digital signal. Baseband data transmission using line codes, resulting in a pulse train, are always considered as digital transmission, although the source signal may be a digitized analog signal. Methods Analog transmission can be conveyed in many different fashions: * Optical fiber * Twisted pair or coaxial cable * Radio * Underwater acoustic communication Th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Falcon Heights, Minnesota
Falcon Heights is a suburb of Saint Paul and a city in Ramsey County, Minnesota, United States. The population was 5,321 at the 2010 census. It became a village in 1949 and a city in 1973. Falcon Heights is the home of the University of Minnesota's St. Paul Campus; the Gabbert Raptor Center and Les Bolstad Golf Course, the Minnesota State Fairgrounds, and the Gibbs Museum of Pioneer and Dakotah Life. Its University Grove neighborhood is known for its modern architecture. History Heman Gibbs settled in the 1850s near the modern intersection of Cleveland and Larpenteur Avenues. His homestead is on the National Register of Historic Places and his home is a county museum. On September 2, 1901, then-Vice President Theodore Roosevelt first publicly used the African proverb "Speak softly and carry a big stick" in a speech at the Minnesota State Fairgrounds, which was still a part of St. Paul at the time. Roosevelt became president just two weeks later, upon the assassination of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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