An antenna farm , satellite dish farm or dish farm is an area dedicated to television or radio telecommunications transmitting or receiving antenna equipment, such as C , K u or K a band satellite dish antennas , UHF / VHF / AM / FM transmitter towers or mobile cell towers . The history of the term "antenna farm" is uncertain, but it dates to at least the 1950s.
115-410: In telecom circles, any area with more than three antennas could be referred to as an antenna farm. In the case of an AM broadcasting station ( mediumwave and longwave , occasionally shortwave ), the multiple mast radiators may all be part of an antenna system for a single station, while for VHF and UHF the site may be under joint management . Alternatively, a single tower with many separate antennas
230-461: A radiation (closer to daylight or radiant heat in energy level, much less disruptive to cellular activity than emissions from radioactive elements or x-ray machines) hazard unless stations are powered-down. Where terrain and road access allows, mountaintop sites are very attractive for non-AM broadcast stations and others, because it increases the stations' height above average terrain , allowing them to reach further by avoiding obstructions on
345-563: A skywave . The medium-wave transmitter at Berlin-Britz for transmitting RIAS used a cross dipole mounted on five 30.5-metre-high guyed masts to transmit the skywave to the ionosphere at nighttime. Because at these frequencies atmospheric noise is far above the receiver signal-to-noise ratio , inefficient antennas much smaller than a wavelength can be used for receiving. For reception at frequencies below 1.6 MHz, which includes long and medium waves, loop antennas are popular because of their ability to reject locally generated noise. By far
460-565: A better site, but there were also objections that it would ruin the view of that mountain from the valley. Despite other alternatives, the new "supertower" was forced on Lookout Mountain by the U.S. Congress , allowing the existing towers to be removed in 2009 after analog shutdown . The site began operating in spring 2008. Mediumwave Medium wave ( MW ) is a 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
575-791: A downtown Heinen's supermarket. Cleveland's historic ecclesiastical architecture includes the Presbyterian Old Stone Church in downtown Cleveland, the onion domed St. Theodosius Russian Orthodox Cathedral in Tremont , and the Catholic Cathedral of St. John the Evangelist along with myriad other ethnically inspired Roman Catholic churches. The Cleveland City Planning Commission has officially designated 34 neighborhoods in Cleveland. Centered on Public Square, Downtown Cleveland
690-740: A few specially licensed AM broadcasting stations. These channels are called clear channels , and they are required to broadcast at higher powers of 10 to 50 kW. Initially, broadcasting in the United States was restricted to two wavelengths: "entertainment" was broadcast at 360 meters (833 kHz), with stations required to switch to 485 meters (619 kHz) when broadcasting weather forecasts, crop price reports and other government reports. This arrangement had numerous practical difficulties. Early transmitters were technically crude and virtually impossible to set accurately on their intended frequency and if (as frequently happened) two (or more) stations in
805-685: A foreign-born population of 30%. At this time, Cleveland saw the rise of radical labor movements, most prominently the Industrial Workers of the World (IWW), in response to the conditions of the largely immigrant and migrant workers. In 1919, the city attracted national attention amid the First Red Scare for the Cleveland May Day Riots , in which local socialist and IWW demonstrators clashed with anti-socialists. The riots occurred during
920-562: A gradual economic recovery under Mayor George V. Voinovich in the 1980s. Downtown saw the construction of the Key Tower and 200 Public Square skyscrapers, as well as the development of the Gateway Sports and Entertainment Complex – consisting of Progressive Field and Rocket Mortgage FieldHouse – and North Coast Harbor, including the Rock and Roll Hall of Fame , Cleveland Browns Stadium , and
1035-613: A high school diploma or equivalent. The median age was 36.6 years. As of 2020 , the racial and ethnic composition of the city was 47.5% African American, 32.1% non-Hispanic white , 13.1% Hispanic or Latino , 2.8% Asian , 0% Pacific Islander , 0.2% Native American, and 3.8% from two or more races . 85.3% of Clevelanders age five and older spoke only English at home, while 14.7% spoke a language other than English, including Spanish , Arabic , Chinese , Hungarian , Albanian , and various Slavic languages ( Russian , Polish , Serbian , Croatian , and Slovene ). The city's spoken accent
1150-798: A homogeneous settlement of New England Protestants , it evolved into a city with a diverse religious composition. The predominant faith among Clevelanders today is Christianity ( Catholic , Protestant, and Eastern and Oriental Orthodox ), with Jewish, Muslim , Hindu , and Buddhist minorities. Within Cleveland, the neighborhoods with the highest foreign-born populations are Asiatown/Goodrich–Kirtland Park (32.7%), Clark–Fulton (26.7%), West Boulevard (18.5%), Brooklyn Centre (17.3%), Downtown (17.2%), University Circle (15.9%, with 20% in Little Italy), and Jefferson (14.3%). Recent waves of immigration have brought new groups to Cleveland, including Ethiopians and South Asians , as well as immigrants from Russia and
1265-514: A lower one for omnidirectional and a higher one for directional radiation with minima in certain directions. The power limit can also be depending on daytime and it is possible that a station may not operate at nighttime, because it would then produce too much interference. Other countries may only operate low-powered transmitters on the same frequency, again subject to agreement. International medium wave broadcasting in Europe has decreased markedly with
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#17328554706051380-619: A naturalization ceremony of new immigrants. Cleveland's location on the Cuyahoga River and Lake Erie has been key to its growth as a major commercial center. Steel and many other manufactured goods emerged as leading industries. The city has since diversified its economy in addition to its manufacturing sector. Established in 1914, the Federal Reserve Bank of Cleveland is one of 12 U.S. Federal Reserve Banks . Its downtown building, located on East 6th Street and Superior Avenue ,
1495-465: A new tower is added. This has been increasingly so for TV stations , which have been pursuing with alacrity the construction of new digital television antennas. Because many of these towers are already full, or were built well before there was the expectation of DTV, many stations have been forced to go through the even greater expense of constructing a new tower. One such situation was in Colorado , in
1610-404: A poor vertical radiation pattern, and 195 electrical degrees (about 400 millivolts per meter using one kilowatt at one kilometre) is generally considered ideal in these cases. Mast antennas are usually series-excited (base driven); the feedline is attached to the mast at the base. The base of the antenna is at high electrical potential and must be supported on a ceramic insulator to isolate it from
1725-616: A population of 372,624 in 2020. The city anchors the Cleveland metropolitan area , the 33rd-largest in the U.S. at 2.18 million residents, as well as the larger Cleveland– Akron – Canton combined statistical area with 3.63 million residents. Cleveland was founded in 1796 near the mouth of the Cuyahoga River as part of the Connecticut Western Reserve in modern-day Northeast Ohio by General Moses Cleaveland , after whom
1840-436: A quarter- wavelength (about 310 millivolts per meter using one kilowatt at one kilometre) to 5/8 wavelength (225 electrical degrees; about 440 millivolts per meter using one kilowatt at one kilometre), while high power stations mostly use half-wavelength to 5/9 wavelength. The usage of masts taller than 5/9 wavelength (200 electrical degrees; about 410 millivolts per meter using one kilowatt at one kilometre) with high power gives
1955-554: A residential street. In the late 1880s, writer Bayard Taylor described it as "the most beautiful street in the world". Known as Cleveland's "Crystal Palace", the five-story Cleveland Arcade (sometimes called the Old Arcade) was built in 1890 and renovated in 2001 as a Hyatt Regency Hotel. Another major architectural landmark, the Cleveland Trust Company Building , was completed in 1907 and renovated in 2015 as
2070-763: A total of 13 times beginning in 1868. It was the river fire of June 1969 that spurred the city to action under Mayor Carl B. Stokes, and played a key role in the passage of the Clean Water Act in 1972 and the National Environmental Policy Act later that year. Since that time, the Cuyahoga has been extensively cleaned up through the efforts of the city and the Ohio Environmental Protection Agency (OEPA). In addition to continued efforts to improve freshwater and air quality, Cleveland
2185-420: A vertical radiator wire. A popular choice for lower-powered stations is the umbrella antenna , which needs only one mast one-tenth wavelength or less in height. This antenna uses a single mast insulated from ground and fed at the lower end against ground. At the top of the mast, radial top-load wires are connected (usually about six) which slope downwards at an angle of 40–45 degrees as far as about one-third of
2300-460: Is 569 feet (173 m) above sea level ; however, the city lies on a series of irregular bluffs lying roughly parallel to the lake. In Cleveland these bluffs are cut principally by the Cuyahoga River , Big Creek, and Euclid Creek . The land rises quickly from the lake shore elevation of 569 feet. Public Square, less than one mile (1.6 km) inland, sits at an elevation of 650 feet (198 m), and Hopkins Airport, 5 miles (8 km) inland from
2415-601: Is a port city , connected to the Atlantic Ocean via the Saint Lawrence Seaway . Its economy relies on diverse sectors that include higher education, manufacturing, financial services, healthcare, and biomedicals. The city serves as the headquarters of the Federal Reserve Bank of Cleveland , as well as several major companies. The GDP for the Greater Cleveland MSA was US$ 138.3 billion in 2022. Combined with
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#17328554706052530-518: Is a city in the U.S. state of Ohio and the county seat of Cuyahoga County . Located along the southern shore of Lake Erie , it is situated across the Canada–United States maritime border and lies approximately 60 mi (97 km) west of Pennsylvania . Cleveland is the most populous city on Lake Erie, the second-most populous city in Ohio, and the 54th-most populous city in the U.S. with
2645-477: Is adequate for talk and news but not for high-fidelity music. However, many stations use audio bandwidths up 10 kHz, which is not hi-fi but sufficient for casual listening. In the UK, until 2024 most stations used a bandwidth of 6.3 kHz. However in 2024, Ofcom expanded the allowed bandwidth to 9khz, giving a noticeable improvement in quality. With AM, it largely depends on the frequency filters of each receiver how
2760-970: Is an advanced form of Inland Northern American English , similar to other Great Lakes cities, but distinctive from the rest of Ohio. In the 19th and early 20th centuries, Cleveland saw a massive influx of immigrants from Ireland, Italy , and the Austro-Hungarian , German , Russian , and Ottoman empires, most of whom were attracted by manufacturing jobs. As a result, Cleveland and Cuyahoga County today have substantial communities of Irish (especially in West Park), Italians (especially in Little Italy), Germans , and several Central -Eastern European ethnicities, including Czechs , Hungarians , Lithuanians , Poles , Romanians , Russians , Rusyns , Slovaks , Ukrainians , and ex- Yugoslav groups, such as Slovenes , Croats and Serbs . The presence of Hungarians within Cleveland proper was, at one time, so great that
2875-449: Is gaining popularity and offers AM stations the chance to switch over if no frequency in the FM band is available, (however digital radio still has coverage issues in many parts of Europe). Many countries in Europe have switched off or limited their MW transmitters since the 2010s. The term is a historic one, dating from the early 20th century, when the radio spectrum was divided on the basis of
2990-544: Is now exploring renewable energy. The city's two main electrical utilities are FirstEnergy and Cleveland Public Power . Its climate action plan , updated in December 2018, has a 2050 target of 100% renewable power , along with reduction of greenhouse gases to 80% below the 2010 level. In recent decades, Cleveland has been working to address the issue of harmful algal blooms on Lake Erie, fed primarily by agricultural runoff, which have presented new environmental challenges for
3105-450: Is often called a " candelabra tower". Commercial antenna farms are managed by radio stations , television stations , satellite teleports or military organizations and are mostly very secure facilities with access limited to broadcast engineers , RF engineers or maintenance technicians . This is not only for the physical security of the location (including preventing equipment / metal theft ), but also for safety, as there may be
3220-497: 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 band for broadcasting from the beginnings in the 1920s into the 1950s until FM with a better sound quality took over. In Europe, digital radio
3335-638: Is possible and is or was offered by some stations in the U.S., Canada, Mexico, the Dominican Republic, Paraguay, Australia, The Philippines, Japan, South Korea, South Africa, Italy and France. However, there have been multiple standards for AM stereo . C-QUAM is the official standard in the United States as well as other countries, but receivers that implement the technology are no longer readily available to consumers. Used receivers with AM Stereo can be found. Names such as "FM/AM Stereo" or "AM & FM Stereo" can be misleading and usually do not signify that
3450-433: Is primarily only used by low-power stations; it is the preferred range for services with automated traffic, weather, and tourist information. The channel steps of 9 and 10 kHz require limiting the audio bandwidth to 9 and 10 kHz (at maximum without causing interference; ±4.5 kHz (9 kHz) and ±5 kHz (10 kHz) on each two sidebands) because the audio spectrum is transmitted twice on each side band . This
3565-744: Is the World Trade Center Tower One, on which many of the New York City television and several FM stations had their antennas. All were lost when Twin Towers One and Two collapsed after the September 11 attacks in 2001. Most of those stations reverted to broadcasting from their previous home, 200 feet lower, on the Empire State Building . Antenna farms have often been the source of complaints from local neighborhoods, particularly when
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3680-510: Is the ITU-approved system for use outside North America and U.S. territories . Some HD Radio receivers also support C-QUAM AM stereo, although this feature is usually not advertised by the manufacturer. For broadcasting, mast radiators are the most common type of antenna used, consisting of a steel lattice guyed mast in which the mast structure itself is used as the antenna. Stations broadcasting with low power can use masts with heights of
3795-825: Is the city's central business district, encompassing a wide range of subdistricts, such as the Nine-Twelve District , the Campus District , the Civic Center , East 4th Street , and Playhouse Square . It also historically included the lively Short Vincent entertainment district. Mixed-use areas, such as the Warehouse District and the Superior Arts District , are occupied by industrial and office buildings as well as restaurants, cafes, and bars. The number of condominiums , lofts , and apartments has been on
3910-424: Is the warmest month with a mean temperature of 74.5 °F (23.6 °C), and January, with a mean temperature of 29.1 °F (−1.6 °C), is the coldest. Normal yearly precipitation based on the 30-year average from 1991 to 2020 is 41.03 inches (1,042 mm). The least precipitation occurs on the western side and directly along the lake, and the most occurs in the eastern suburbs. Parts of Geauga County to
4025-725: The Akron MSA , the eight-county Cleveland–Akron metropolitan economy was $ 176 billion in 2022, the largest in Ohio. Designated as a global city by the Globalization and World Cities Research Network , Cleveland is home to several major cultural institutions, including the Cleveland Museum of Art , the Cleveland Museum of Natural History , the Cleveland Orchestra , the Cleveland Public Library , Playhouse Square , and
4140-878: The Appalachian Mountains of the Eastern United States, Poor Mountain serves most of the FM and TV stations in the Roanoke / Lynchburg market. Holston Mountain in upper East Tennessee is home to most of the FM and TV stations in the Tri-Cities ( Bristol, Virginia - Kingsport, Tennessee - Johnson City, Tennessee ) DMA. Other examples are Signal Mountain near Chattanooga, Tennessee, Sharp's Ridge in Knoxville, Tennessee, and Paris Mountain in Greenville, South Carolina . Other examples of co-located towers on mountain peaks in
4255-754: The Beverage antenna ) and the ferrite sleeve loop antenna. ELF 3 Hz/100 Mm 30 Hz/10 Mm SLF 30 Hz/10 Mm 300 Hz/1 Mm ULF 300 Hz/1 Mm 3 kHz/100 km VLF 3 kHz/100 km 30 kHz/10 km LF 30 kHz/10 km 300 kHz/1 km MF 300 kHz/1 km 3 MHz/100 m HF 3 MHz/100 m 30 MHz/10 m VHF 30 MHz/10 m 300 MHz/1 m UHF 300 MHz/1 m 3 GHz/100 mm SHF 3 GHz/100 mm 30 GHz/10 mm EHF 30 GHz/10 mm 300 GHz/1 mm THF 300 GHz/1 mm 3 THz/0.1 mm Cleveland, Ohio Cleveland
4370-449: The Cfa humid subtropical climate . Summers are hot and humid, while winters are cold and snowy. East of the mouth of the Cuyahoga, the land elevation rises rapidly in the south. Together with the prevailing winds off Lake Erie, this feature is the principal contributor to the lake-effect snow that is typical in Cleveland (especially on the city's East Side) from mid-November until the surface of
4485-484: 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)
4600-607: The Federal Communications Commission (FCC) to shut down, reduce power, or employ a directional antenna array at night in order to avoid interference with each other due to night-time only long-distance skywave propagation (sometimes loosely called ‘skip’). Those stations which shut down completely at night are often known as "daytimers". Similar regulations are in force for Canadian stations, administered by Industry Canada ; however, daytimers no longer exist in Canada,
4715-552: The Glenn Research Center in Cleveland. Jones Day , one of the largest law firms in the U.S., was founded in Cleveland in 1893. Healthcare plays a major role in Cleveland's economy. The city's "Big Three" hospital systems are the Cleveland Clinic , University Hospitals , and MetroHealth . The Cleveland Clinic is the largest private employer in the state of Ohio, with a workforce of over 55,000 as of 2022 . It carries
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4830-662: The Great Lakes Science Center . Although the city emerged from default in 1987, it later suffered from the impact of the subprime mortgage crisis and the Great Recession . Nevertheless, by the turn of the 21st century, Cleveland succeeded in developing a more diversified economy and gained a national reputation as a center for healthcare and the arts. The city's downtown and several neighborhoods have experienced significant population growth since 2010, while overall population decline has slowed. Challenges remain for
4945-610: The Reno / Tahoe area. Some cities instead have combined many stations onto one tower, often through diplexers into just one or two antennas, such as atop the Empire State Building in New York , the landmark Sutro Tower of San Francisco , or the huge Miami Gardens tower serving the Miami and Fort Lauderdale region . Cleveland, Ohio has its antenna farm in the suburb of Parma, Ohio due to Parma's high elevation. In central Oklahoma City most of
5060-677: The Rock and Roll Hall of Fame , as well as Case Western Reserve University . Known as " The Forest City " among many other nicknames , Cleveland serves as the center of the Cleveland Metroparks nature reserve system. The city's major league professional sports teams include the Cleveland Browns ( football ; NFL ), the Cleveland Cavaliers (basketball; NBA ), and the Cleveland Guardians (baseball; MLB ). Cleveland
5175-672: The Union during the American Civil War . Decades later, in July 1894, the wartime contributions of those serving the Union from Cleveland and Cuyahoga County would be honored with the Soldiers' and Sailors' Monument on Public Square. The Civil War vaulted Cleveland into the first rank of American manufacturing cities and fueled unprecedented growth. Its prime geographic location as a transportation hub on
5290-704: The former USSR , Southeast Europe (especially Albania ), the Middle East, East Asia, and Latin America. In the 2010s, the immigrant population of Cleveland and Cuyahoga County began to see significant growth, becoming a major center for immigration in the Great Lakes region. A 2019 study found Cleveland to be the city with the shortest average processing time in the nation for immigrants to become U.S. citizens . The city's annual One World Day in Rockefeller Park includes
5405-490: The ionosphere and return to Earth at much greater distances; this is called the skywave . At night, especially in winter months and at times of low solar activity, the lower ionospheric D layer virtually disappears. When this happens, MW radio waves can easily be received many hundreds or even thousands of miles away as the signal will be reflected by the higher F layer . This can allow very long-distance broadcasting, but can also interfere with distant local stations. Due to
5520-591: The last station having signed off in 2013, after migrating to the FM band . Many countries have switched off most of their MW transmitters in the 2010s due to cost-cutting and low usage of MW by the listeners. Among those are Germany, France, Russia, Poland, Sweden, the Benelux, Austria, Switzerland, Slovenia and most of the Balkans. Other countries that have no or few MW transmitters include Iceland, Ireland, Finland and Norway. Large networks of transmitters are remaining in
5635-661: The wavelength of the waves into long wave (LW), medium wave, and short wave (SW) radio bands. For Europe, Africa and Asia the MW band consists of 120 channels with carrier frequencies from 531 to 1602 kHz spaced every 9 kHz. Frequency coordination avoids the use of adjacent channels in one area. The total allocated spectrum including the modulated audio ranges from 526.5 to 1606.5 kHz. Australia uses an expanded band up to 1701 kHz. North and South America use 118 channels from 530 to 1700 kHz using 10 kHz spaced channels. The range above 1610 kHz
5750-624: The 1832 completion of the Ohio and Erie Canal . This key link between the Ohio River and the Great Lakes connected Cleveland to the Atlantic Ocean via the Erie Canal and Hudson River, and later via the Saint Lawrence Seaway . The town's growth continued with added railroad links . In 1836, Cleveland, then only on the eastern banks of the Cuyahoga, was officially incorporated as a city, and John W. Willey
5865-405: The 1960s, Cleveland's economy began to slow down, and residents increasingly sought new housing in the suburbs, reflecting the national trends of suburban growth following federally subsidized highways. Industrial restructuring , particularly in the steel and automotive industries, resulted in the loss of numerous jobs in Cleveland and the region, and the city suffered economically. The burning of
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#17328554706055980-617: The Cleveland Transit System, the predecessor to the Greater Cleveland Regional Transit Authority . After the war, Cleveland initially experienced an economic boom , and businesses declared the city to be the "best location in the nation". In 1949, the city was named an All-America City for the first time, and in 1950, its population reached 914,808. In sports, the Indians won the 1948 World Series ,
6095-691: The Cuyahoga River in June 1969 brought national attention to the issue of industrial pollution in Cleveland and served as a catalyst for the American environmental movement . Housing discrimination and redlining against African Americans led to racial unrest in Cleveland and numerous other Northern U.S. cities. In Cleveland, the Hough riots erupted from July 18 to 24, 1966, and the Glenville Shootout took place on July 23, 1968. In November 1967, Cleveland became
6210-615: The East and West Sides, while Broadway–Slavic Village is sometimes referred to as the South Side. Several neighborhoods have begun to attract the return of the middle class that left the city for the suburbs in the 1960s and 1970s. These neighborhoods are on both the West Side (Ohio City, Tremont, Detroit–Shoreway, and Edgewater) and the East Side (Collinwood, Hough, Fairfax, and Little Italy). Much of
6325-434: The Great Lakes played an important role in its development as an industrial and commercial center. In 1870, John D. Rockefeller founded Standard Oil in Cleveland, and in 1885, he moved its headquarters to New York City, which had become a center of finance and business. Cleveland's economic growth and industrial jobs attracted large waves of immigrants from Southern and Eastern Europe as well as Ireland . Urban growth
6440-482: The MW band is thinning out, many local stations from the remaining countries as well as from North Africa and the Middle East can now be received all over Europe, but often only weak with much interference. In Europe, each country is allocated a number of frequencies on which high power (up to 2 MW) can be used; the maximum power is also subject to international agreement by the International Telecommunication Union (ITU). In most cases there are two power limits:
6555-534: The South. Between 1910 and 1970, the black population of Cleveland, largely concentrated on the city's East Side, increased significantly as a result of the First and Second Great Migrations . Cleveland's Latino community consists primarily of Puerto Ricans , as well as smaller numbers of immigrants from Mexico, Cuba , the Dominican Republic , South and Central America, and Spain. The city's Asian community, centered on historical Asiatown, consists of Chinese , Koreans , Vietnamese , and other groups. Additionally,
6670-503: The U.S. during the Battle of Lake Erie in the War of 1812 . Locals adopted Commodore Oliver Hazard Perry as a civic hero and erected a monument in his honor decades later. Largely through the efforts of the settlement's first lawyer Alfred Kelley , the village of Cleveland was incorporated on December 23, 1814. In spite of the nearby swampy lowlands and harsh winters, the town's waterfront location proved to be an advantage, giving it access to Great Lakes trade. It grew rapidly after
6785-433: The UK, Spain and Romania. In the Netherlands and Scandinavia, some new idealistically driven stations have launched low power services on the former high power frequencies. This also applies to the ex-offshore pioneer Radio Caroline that now has a licence to use 648 kHz, which was used by the BBC World Service over decades. In Italy, the government closed its high power transmitters but low power private stations remain. As
6900-428: The United States are on Red Mountain in Birmingham, Alabama; Mount Wilson near Los Angeles; the Sutro Tower in Clarendon Heights near Mount Sutro in San Francisco; Lookout Mountain, Colorado near Denver; Cedar Hill between Dallas and Fort Worth; South Mountain Park near Phoenix; Nelson Peak near Salt Lake City; Sandia Crest near Albuquerque, New Mexico. Probably the most famous broadcast antenna farm of all
7015-755: The audio is reproduced. This is a major disadvantage compared to FM and digital modes where the demodulated audio is more objective. Extended audio bandwidths cause interference on adjacent channels. Wavelengths in this band are long enough that radio waves are not blocked by buildings and hills and can propagate beyond the horizon following the curvature of the Earth; this is called the groundwave . Practical groundwave reception of strong transmitters typically extends to 200–300 miles (320–480 km), with greater distances over terrain with higher ground conductivity , and greatest distances over salt water. The groundwave reaches further on lower medium wave frequencies. Medium waves can also reflect off charged particle layers in
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#17328554706057130-459: The broader strike wave that swept the U.S. that year. Cleveland's population continued to grow throughout the Roaring Twenties . The decade saw the establishment of the city's Playhouse Square , and the rise of the risqué Short Vincent . The Bal-Masque balls of the avant-garde Kokoon Arts Club scandalized the city. Jazz came to prominence in Cleveland during this period. Prohibition first took effect in Ohio in May 1919 (although it
7245-435: The city and for northern Ohio. At the 2020 census, there were 372,624 people and 170,549 households in Cleveland. The population density was 4,901.51 inhabitants per square mile (1,892.5/km ). The median household income was $ 30,907 and the per capita income was $ 21,223. 32.7% of the population was living below the poverty line. Of the city's population over the age of 25, 17.5% held a bachelor's degree or higher, and 80.8% had
7360-450: The city and the county have significant communities of Albanians , Arabs (especially Lebanese , Syrians , and Palestinians ), Armenians , French , Greeks , Iranians , Scots , Turks , and West Indians . A 2020 analysis found Cleveland to be the most ethnically and racially diverse major city in Ohio. The influx of immigrants in the 19th and early 20th centuries drastically transformed Cleveland's religious landscape. From
7475-439: The city and the county include Aleris , American Greetings , Applied Industrial Technologies , Eaton , Forest City Realty Trust , Heinen's Fine Foods, Hyster-Yale Materials Handling , Lincoln Electric , Medical Mutual of Ohio , Moen Incorporated , NACCO Industries , Nordson Corporation , OM Group , Swagelok , Kirby Company , Things Remembered , Third Federal S&L , TransDigm Group , and Vitamix . NASA maintains
7590-425: The city ascends into the Heights on the east, where the region known as the " Snow Belt " begins. Extending from the city's East Side and its suburbs, the Snow Belt reaches up the Lake Erie shore as far as Buffalo . The all-time record high in Cleveland of 104 °F (40 °C) was established on June 25, 1988, and the all-time record low of −20 °F (−29 °C) was set on January 19, 1994. On average, July
7705-429: The city boasted the highest concentration of Hungarians in the world outside of Budapest . Cleveland has a long-established Jewish community , historically centered on the East Side neighborhoods of Glenville and Kinsman, but now mostly concentrated in East Side suburbs such as Cleveland Heights and Beachwood , location of the Maltz Museum of Jewish Heritage . The availability of jobs attracted African Americans from
7820-464: The city from Santa Monica, California in the Women's Air Derby . The Van Sweringen brothers commenced construction of the Terminal Tower skyscraper in 1926 and oversaw it to completion in 1927. By the time the building was dedicated as part of Cleveland Union Terminal in 1930, the city had a population of over 900,000. Cleveland was hit hard by the Wall Street Crash of 1929 and the subsequent Great Depression . A center of union activity ,
7935-408: The city of Golden filed legal objections, including challenging the authority of the Federal Communications Commission (FCC) to override denial of zoning permits by local government (in this case, the Jefferson county commission ). The city of Golden also sought to condemn the site, even though it was outside city limits. It was decided that scenic Eldorado Mountain near Boulder might be
8050-402: The city saw significant labor struggles in this period, including strikes by workers against Fisher Body in 1936 and against Republic Steel in 1937. The city was also aided by major federal works projects sponsored by President Franklin D. Roosevelt 's New Deal . In commemoration of the centennial of Cleveland's incorporation as a city, the Great Lakes Exposition debuted in June 1936 at
8165-513: The city was named. The city's location on the river and the lake shore allowed it to grow into a major commercial and industrial metropolis by the late 19th century, attracting large numbers of immigrants and migrants . It was among the top 10 largest U.S. cities by population for much of the 20th century, a period that saw the development of the city's cultural institutions. By the 1960s, Cleveland's economy began to slow down as manufacturing declined and suburbanization occurred. Cleveland
8280-563: The city's North Coast Harbor , along the Lake Erie shore north of downtown. Conceived by Cleveland's business leaders as a way to revitalize the city during the Depression, it drew four million visitors in its first season, and seven million by the end of its second and final season in September 1937. On December 7, 1941, Imperial Japan attacked Pearl Harbor and declared war on the U.S. Two of
8395-543: The city's media outlets transmitter and tower facilities are located between the Kilpatrick Turnpike to the south and Interstate 44 to the north, Broadway Extension to the west and Interstate 35 to the east with Britton Road being the central thoroughfare. In addition, all three network affiliates and one of the 3 major radio groups have their studio facilities located within the Oklahoma City tower farm. In
8510-418: The city's west side is led by president and CEO Christine Alexander-Rager. Formerly known as City Hospital, it operates one of two Level I trauma centers in the city, and has various locations throughout Greater Cleveland. In 2013, Cleveland's Global Center for Health Innovation opened with 235,000 square feet (21,800 m ) of display space for healthcare companies across the world. To take advantage of
8625-426: The city, with improvement of city schools, economic development of neighborhoods, and continued efforts to tackle poverty, homelessness , and urban blight being top municipal priorities. According to the U.S. Census Bureau , the city has a total area of 82.47 square miles (213.60 km ), of which 77.70 square miles (201.24 km ) is land and 4.77 square miles (12.35 km ) is water. The shore of Lake Erie
8740-535: The country and/or abroad), no longer having to broadcast weather and government reports on a different frequency than entertainment. Class A and B stations were segregated into sub-bands. In the US and Canada the maximum transmitter power is restricted to 50 kilowatts, while in Europe there are medium wave stations with transmitter power up to 2 megawatts daytime. Most United States AM radio stations are required by
8855-508: The distinction of being one of the best hospital systems in the world. The clinic is led by Croatian-born president and CEO Tomislav Mihaljevic and it is affiliated with Case Western Reserve University School of Medicine . University Hospitals includes the University Hospitals Cleveland Medical Center and its Rainbow Babies & Children's Hospital . Cliff Megerian serves as that system's CEO. MetroHealth on
8970-416: The east receive over 44 inches (1,100 mm) of liquid precipitation annually. With its extensive cleanup of its Lake Erie shore and the Cuyahoga River, Cleveland has been recognized by national media as an environmental success story and a national leader in environmental protection. Since the city's industrialization, the Cuyahoga River had become so affected by industrial pollution that it "caught fire"
9085-604: The end of the Cold War and the increased availability of satellite and Internet TV and radio, although the cross-border reception of neighbouring countries' broadcasts by expatriates and other interested listeners still takes place. In the late 20th century, overcrowding on the Medium wave band was a serious problem in parts of Europe contributing to the early adoption of VHF FM broadcasting by many stations (particularly in Germany). Due to
9200-461: The first major American city since the Great Depression to enter into a financial default on federal loans. The national recession of the early 1980s "further eroded the city's traditional economic base." While unemployment during the period peaked in 1983, Cleveland's rate of 13.8% was higher than the national average due to the closure of several steel production centers. The city began
9315-425: The first major American city to elect an African American mayor, Carl B. Stokes , who served from 1968 to 1971 and played an instrumental role in restoring the Cuyahoga River. During the 1970s, Cleveland became known as "Bomb City U.S.A." due to several bombings that shook the city, mostly due to organized crime rivalries. In December 1978, during the turbulent tenure of Dennis Kucinich as mayor, Cleveland became
9430-578: The frequency. Because such tall masts can be costly and uneconomic, other types of antennas are often used, which employ capacitive top-loading ( electrical lengthening ) to achieve equivalent signal strength with vertical masts shorter than a quarter wavelength. A "top hat" of radial wires is occasionally added to the top of mast radiators, to allow the mast to be made shorter. For local broadcast stations and amateur stations of under 5 kW, T- and L-antennas are often used, which consist of one or more horizontal wires suspended between two masts, attached to
9545-535: The golden age in Downtown Cleveland retail, centered on major department stores Higbee's , Bailey's, the May Company , Taylor's , Halle's , and Sterling Lindner Davis , which collectively represented one of the largest and most fashionable shopping districts in the country, often compared to New York's Fifth Avenue . In 1929, Cleveland hosted the first of many National Air Races , and Amelia Earhart flew to
9660-1014: The ground, and by increasing the radio horizon . With a clearer line of sight in both cases, more signal can be received. While the same is true of a very tall tower, like Paris ’ Eiffel Tower , such towers are expensive, dangerous, and difficult to access the top of, and may collect and drop large amounts of ice in winter, or even collapse in a severe ice storm and/or high winds. Multiple small towers also allow stations to have backup facilities co-located on each other's towers for redundancy . Satellite antenna farms are usually located at remote locations, far away from urban development, especially high rise buildings or airplane flight paths, to avoid and minimize disruption to transmission and reception, and so as to not be an eyesore. Although most radio and TV stations are in fierce competition with each other in their broadcast markets, they will often locate their broadcasting antennas very near each other, and in some cases, will even share land or towers with each other, in
9775-423: The ground. Shunt-excited masts, in which the base of the mast is at a node of the standing wave at ground potential and so does not need to be insulated from the ground, have fallen into disuse, except in cases of exceptionally high power, 1 MW or more, where series excitation might be impractical. If grounded masts or towers are required, cage or long-wire aerials are used. Another possibility consists of feeding
9890-408: The growth has been spurred on by attracting creative class members, which has facilitated new residential development and the transformation of old industrial buildings into loft spaces for artists. Typical of the Great Lakes region , Cleveland exhibits a continental climate with four distinct seasons, which lies in the humid continental ( Köppen Dfa ) zone. The climate is transitional with
10005-673: The high demand for frequencies in Europe, many countries set up single frequency networks; in Britain , BBC Radio Five Live broadcasts from various transmitters on either 693 or 909 kHz. These transmitters are carefully synchronized to minimize interference from more distant transmitters on the same frequency. In Asia and the Middle East, many high-powered transmitters remain in operation. China , Indonesia , South Korea , North Korea , Japan , Thailand , Vietnam , Philippines , Saudi Arabia , Egypt , India , Pakistan and Bangladesh still use medium wave. Israel returns to mediumwave after
10120-596: The hockey team, the Barons , became champions of the American Hockey League, and the Browns dominated professional football in the 1950s. As a result, along with track and boxing champions produced, Cleveland was declared the "City of Champions" in sports at this time. Additionally, the 1950s saw the rising popularity of a new music genre that local WJW (AM) disc jockey Alan Freed dubbed " rock and roll ". However, by
10235-644: The increase since 2000 and especially 2010, reflecting downtown's growing population. Clevelanders geographically define themselves in terms of whether they live on the east or west side of the Cuyahoga River. The East Side includes the neighborhoods of Buckeye–Shaker , Buckeye–Woodhill , Central , Collinwood (including Nottingham ), Euclid–Green , Fairfax , Glenville , Goodrich–Kirtland Park (including Asiatown ), Hough , Kinsman , Lee–Miles (including Lee–Harvard and Lee–Seville), Mount Pleasant , St. Clair–Superior , Union–Miles Park , and University Circle (including Little Italy ). The West Side includes
10350-586: The interests of space, land availability, and the cost of putting a transmission building on top of a mountain. Most metropolitan areas have at least one antenna farm, such as: Dedham / Needham in the metro Boston market, Mount Wilson in greater Los Angeles (seen at right), Sweat Mountain in metro Atlanta , Farnsworth Peak for the Salt Lake Valley , Riverview in Tampa , Florida, Baltimore 's Television Hill and Slide Mountain ( Mount Rose ski area ) in
10465-479: The lake freezes, usually in late January or early February. The lake effect causes a relative differential in geographical snowfall totals across the city. On the city's far West Side, the Hopkins neighborhood only reached 100 inches (254 cm) of snowfall in a season three times since record-keeping for snow began in 1893. By contrast, seasonal totals approaching or exceeding 100 inches (254 cm) are not uncommon as
10580-480: The lake, is at an elevation of 791 feet (241 m). Cleveland borders several inner-ring and streetcar suburbs . To the west, it borders Lakewood , Rocky River , and Fairview Park , and to the east, it borders Shaker Heights , Cleveland Heights , South Euclid , and East Cleveland . To the southwest, it borders Linndale , Brooklyn , Parma , and Brook Park . To the south, the city borders Newburgh Heights , Cuyahoga Heights , and Brooklyn Heights and to
10695-487: The late 1990s and early to mid-2000s. Many of the Denver metropolitan area TV stations already transmitted analog TV from Lookout Mountain , but needed the extra space for more antennas. Additionally, since many people live on Lookout Mountain, there was also the concern about safety, not only from falling ice or even the slight risk of a tower collapse, but also ongoing from the additional RF that it would create. Residents and
10810-578: The limited number of available channels in the MW broadcast band, the same frequencies are re-allocated to different broadcasting stations several hundred miles apart. On nights of good skywave propagation, the skywave signals of a distant station may interfere with the signals of local stations on the same frequency. In North America, the North American Regional Broadcasting Agreement (NARBA) sets aside certain channels for nighttime use over extended service areas via skywave by
10925-486: The mast or the tower by cables running from the tuning unit to the guys or crossbars at a certain height. Directional aerials consist of multiple masts , which need not to be of the same height. It is also possible to realize directional aerials for mediumwave with cage aerials where some parts of the cage are fed with a certain phase difference. For medium-wave (AM) broadcasting, quarter-wave masts are between 153 feet (47 m) and 463 feet (141 m) high, depending on
11040-613: The most common antenna for broadcast reception is the ferrite-rod antenna , also known as a loopstick antenna. The high permeability ferrite core allows it to be compact enough to be enclosed inside the radio's case and still have adequate sensitivity. For weak signal reception or to discriminate between different signals sharing a common frequency directional antennas are used. For best signal-to-noise ratio these are best located outdoors away from sources of electrical interference. Examples of such medium wave antennas include broadband untuned loops, elongated terminated loops, wave antennas (e.g.
11155-452: The neighborhoods of Brooklyn Centre , Clark–Fulton , Cudell , Detroit–Shoreway , Edgewater , Ohio City , Old Brooklyn , Stockyards , Tremont (including Duck Island ), West Boulevard , and the four neighborhoods colloquially known as West Park : Kamm's Corners , Jefferson , Bellaire–Puritas , and Hopkins . The Cuyahoga Valley neighborhood (including the Flats ) is situated between
11270-610: The open Cleveland Mall and share a common neoclassical architecture . They were built in the early 20th century as the result of the 1903 Group Plan. They constitute one of the most complete examples of City Beautiful design in the U.S. Completed in 1927 and dedicated in 1930 as part of the Cleveland Union Terminal complex, the Terminal Tower was the tallest building in North America outside New York City until 1964 and
11385-416: The outbreak of Israel-Hamas war . China operates many single-frequency networks across the country. As of May 2023, many Japanese broadcasters like NHK broadcast in medium wave, with many high power transmitters operating across Japan. There are also some low power relay transmitters for rural areas. Some countries have stopped using mediumwave, including Malaysia and Singapore. Stereo transmission
11500-545: The radio will decode C-QUAM AM stereo, whereas a set labelled "FM Stereo/AM Stereo" or "AMAX Stereo" will support AM stereo. In September 2002, the United States Federal Communications Commission approved the proprietary iBiquity in-band on-channel (IBOC) HD Radio system of digital audio broadcasting , which is meant to improve the audio quality of signals. The Digital Radio Mondiale (DRM) system standardised by ETSI supports stereo and
11615-529: The rural South arrived in Cleveland (among other Northeastern and Midwestern cities) as part of the Great Migration for jobs, constitutional rights, and relief from racial discrimination . By 1920, the year in which the Cleveland Indians won their first World Series championship , Cleveland had grown into a densely-populated metropolis of 796,841, making it the fifth-largest city in the nation, with
11730-566: The same part of the country broadcast simultaneously the resultant interference meant that usually neither could be heard clearly. The Commerce Department rarely intervened in such cases but left it up to stations to enter into voluntary timesharing agreements amongst themselves. The addition of a third "entertainment" wavelength, 400 meters, did little to solve this overcrowding. In 1923, the Commerce Department realized that as more and more stations were applying for commercial licenses, it
11845-484: The southeast, it borders Warrensville Heights , Maple Heights , and Garfield Heights . To the northeast, along the shore of Lake Erie, Cleveland borders Bratenahl and Euclid . Cleveland's downtown architecture is diverse. Many of the city's government and civic buildings, including City Hall , the Cuyahoga County Courthouse , the Cleveland Public Library , and Public Auditorium , are clustered around
11960-468: The tallest in the city until 1991. It is a prototypical Beaux-Arts skyscraper. The two other major skyscrapers on Public Square, Key Tower (the tallest building in Ohio) and 200 Public Square, combine elements of Art Deco architecture with postmodern designs. Running east from Public Square through University Circle is Euclid Avenue , which was known as "Millionaires' Row" for its prestige and elegance as
12075-419: The time as the sixth-largest U.S. city. Its automotive companies included Peerless , Chandler , and Winton , maker of the first car driven across the U.S. Other manufacturing industries in Cleveland included steam cars produced by White and electric cars produced by Baker . The city counted major Progressive Era politicians among its leaders, most prominently the populist Mayor Tom L. Johnson , who
12190-482: The total height, where they are terminated in insulators and thence outwards to ground anchors . Thus the umbrella antenna uses the guy wires as the top-load part of the antenna. In all these antennas the smaller radiation resistance of the short radiator is increased by the capacitance added by the wires attached to the top of the antenna. In some rare cases dipole antennas are used, which are slung between two masts or towers. Such antennas are intended to radiate
12305-415: The victims of the attack were Cleveland natives – Rear Admiral Isaac C. Kidd and ensign William Halloran. The attack signaled America's entry into World War II . A major hub of the " Arsenal of Democracy ", Cleveland under Mayor Frank Lausche contributed massively to the U.S. war effort as the fifth largest manufacturing center in the nation. During his tenure, Lausche also oversaw the establishment of
12420-428: Was accompanied by significant strikes and labor unrest, as workers demanded better wages and working conditions . Between 1881 and 1886, 70 to 80% of strikes were successful in improving labor conditions in Cleveland. The Cleveland Streetcar Strike of 1899 was one of the more violent instances of labor strife in the city during this period. By 1910, Cleveland had become known as the "Sixth City" due to its status at
12535-575: Was completed in 1923 by the Cleveland architectural firm Walker and Weeks . The headquarters of the Federal Reserve System's Fourth District, the bank employs 1,000 people and maintains branch offices in Cincinnati and Pittsburgh . Cleveland and Cuyahoga County are home to Fortune 500 companies Cleveland-Cliffs , Progressive , Sherwin-Williams , Parker-Hannifin , KeyCorp , and Travel Centers of America . Other large companies based in
12650-547: Was elected its first mayor. That same year, it nearly erupted into open warfare with neighboring Ohio City over a bridge connecting the two communities. Ohio City remained an independent municipality until its annexation by Cleveland in 1854. A center of abolitionist activity, Cleveland (code-named "Station Hope") was a major stop on the Underground Railroad for escaped African American slaves en route to Canada. The city also served as an important center for
12765-706: Was established on July 22, 1796, by surveyors of the Connecticut Land Company when they laid out Connecticut 's Western Reserve into townships and a capital city. They named the settlement "Cleaveland" after their leader, General Moses Cleaveland , a veteran of the American Revolutionary War . Cleaveland oversaw the New England –style design of the plan for what would become the modern downtown area, centered on Public Square , before returning to Connecticut, never again to visit Ohio. The town's name
12880-426: Was not practical to have every station broadcast on the same three wavelengths. On 15 May 1923, Commerce Secretary Herbert Hoover announced a new bandplan which set aside 81 frequencies, in 10 kHz steps, from 550 kHz to 1350 kHz (extended to 1500, then 1600 and ultimately 1700 kHz in later years). Each station would be assigned one frequency (albeit usually shared with stations in other parts of
12995-570: Was not well-enforced in Cleveland), became law with the Volstead Act in 1920, and was eventually repealed nationally by Congress in 1933. The ban on alcohol led to the rise of speakeasies throughout the city and organized crime gangs, such as the Mayfield Road Mob , who smuggled bootleg liquor across Lake Erie from Canada into Cleveland. The era of the flapper marked the beginning of
13110-407: Was often shortened to "Cleveland", even by Cleaveland's original surveyors. A common myth emerged that the spelling was altered by The Cleveland Advertiser in order to fit the name on the newspaper's masthead . The first permanent European settler in Cleveland was Lorenzo Carter , who built a cabin on the banks of the Cuyahoga River. The emerging community served as an important supply post for
13225-561: Was responsible for the development of the Cleveland Mall Plan . The era of the City Beautiful movement in Cleveland architecture saw wealthy patrons support the establishment of the city's major cultural institutions. The most prominent among them were the Cleveland Museum of Art , which opened in 1916, and the Cleveland Orchestra , established in 1918. In addition to the large immigrant population, African American migrants from
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