Misplaced Pages

#147852

73-490: The station first signed on in 1962 as CKY-FM simulcasting AM 580 CKY broadcasting at 360,000 watts, making it the most powerful FM radio station in North America. The station adopted its current call sign , CITI-FM , on April 1, 1978, The first song played on CITI was Deep Purple 's " Highway Star ". In the early 1990s, the station was acquired by Rogers Radio , who converted CITI's sister A.M. station CKY to

146-411: A fiber optic line to the cable headend . Other broadcasters that are part of a radio or television network may run an unedited feed of the network's overnight programming from a central location, without local advertising . During what are otherwise closedown hours, some channels may also simulcast their teletext pages or full page headlines with music or feeds from sister radio stations playing in

219-780: A radio network that provides content in a common radio format , either in broadcast syndication or simulcast , or both. The encoding of a radio broadcast depends on whether it uses an analog or digital signal . Analog radio broadcasts use one of two types of radio wave modulation : amplitude modulation for AM radio , or frequency modulation for FM radio . Newer, digital radio stations transmit in several different digital audio standards, such as DAB ( Digital Audio Broadcasting ), HD radio , or DRM ( Digital Radio Mondiale ). The earliest radio stations were radiotelegraphy systems and did not carry audio. For audio broadcasts to be possible, electronic detection and amplification devices had to be incorporated. The thermionic valve ,

292-427: A "radio station" as a government-licensed AM or FM station; an HD Radio (primary or multicast) station; an internet stream of an existing government-licensed station; one of the satellite radio channels from XM Satellite Radio or Sirius Satellite Radio ; or, potentially, a station that is not government licensed. AM stations were the earliest broadcasting stations to be developed. AM refers to amplitude modulation ,

365-455: A biographical film, after criticism from the LGBT community over Gill—who was a trans man —being played by a cisgender woman. Wheeler compared being transgender to being an "actor" that "pretends" to be a "different thing", and also expressed similar sentiment over Facebook Messenger with a listener who discussed the issue further, stating that "If someone is born human. And they pretend to be

438-423: A broadcaster has to drastically reduce power or sign off entirely at sunset was traditionally the least desirable assignment, which would usually go to small or new-entrant stations when all of the more favourable slots were already allocated. These AM daytimers are becoming less common as stations (and audiences) migrate to FM or to frequencies vacated by the closure of other stations, but a handful still exist in

511-428: A broadcaster's digital specialty or sub-channels may sign-on and sign-off at significantly different times than its main channels. Like other television programming , sign-on and sign-off sequences can be initiated by a broadcast automation system, and automatic transmission systems can turn the carrier signal and transmitter on/off by remote control . Sign-on and sign-off sequences have become less common due to

584-494: A business opportunity to sell advertising or subscriptions to a broader audience. This is more efficient than broadcasting to a single country, because domestic entertainment programs and information gathered by domestic news staff can be cheaply repackaged for non-domestic audiences. Governments typically have different motivations for funding international broadcasting. One clear reason is for ideological, or propaganda reasons. Many government-owned stations portray their nation in

657-479: A continuity announcement, clock and the country's national anthem (for BBC One Wales and HTV Wales , Hen Wlad Fy Nhadau was also played beforehand), while Granada and Channel 4 signed-off with just an announcement, clock and ident, and BBC Two , Yorkshire and Border closed down with an announcement over their station clock. In Germany , it is a custom to play the national anthem (for Bayerischer Rundfunk and stations owned by ProSiebenSat.1 Media ,

730-657: A day instead of signing off. In 2012, TV1 broadcast 24 hours a day during the London Olympics in 2012 , due to the time difference. This would become permanent in August 2012, to coincide with their sister channel TV2 by showing reruns from the broadcaster's archive library and movies on early mornings before start-up. During the Holy Week in the Philippines that occurs anywhere between the last week of March to

803-729: A dog. It is not right to agree with them for the sake of their feelings". Multiple businesses pulled their advertising from the station in response to the comments. After Wheeler's departure, co-hosts Jae and Dave Turnbull continued on the morning show along with former Winnipeg Blue Bomber Kelly Butler as a new addition. TJ Connors, son of legendary radio host Scruff Connors, joined the show replacing Butler in 2018. In 2021, Jae left CITI Mornings. 49°45′20″N 97°07′53″W  /  49.75556°N 97.13139°W  / 49.75556; -97.13139 Sign-on A sign-on (or start-up in Commonwealth countries except Canada)

SECTION 10

#1732797691148

876-463: A kind of vacuum tube , was invented in 1904 by the English physicist John Ambrose Fleming . He developed a device that he called an "oscillation valve," because it passes current in only one direction. The heated filament, or cathode , was capable of thermionic emission of electrons that would flow to the plate (or anode ) when it was at a higher voltage. Electrons, however, could not pass in

949-546: A mode of broadcasting radio waves by varying the amplitude of the carrier signal in response to the amplitude of the signal to be transmitted. The medium-wave band is used worldwide for AM broadcasting. Europe also uses the long wave band. In response to the growing popularity of FM stereo radio stations in the late 1980s and early 1990s, some North American stations began broadcasting in AM stereo , though this never gained popularity and very few receivers were ever sold. The signal

1022-592: A national boundary. In other cases, a broadcast may be considered "pirate" due to the type of content, its transmission format, or the transmitting power (wattage) of the station, even if the transmission is not technically illegal (such as a webcast or an amateur radio transmission). Pirate radio stations are sometimes referred to as bootleg radio or clandestine stations. Digital radio broadcasting has emerged, first in Europe (the UK in 1995 and Germany in 1999), and later in

1095-475: A new contract with Corus Radio . On January 12, 2015, the station's morning show Wheeler in the Morning began to be simulcast by sister Citytv station CHMI-DT , replacing the cancelled Winnipeg version of Breakfast Television . The former Breakfast Television hosts Jenna Khan and Drew Kozub presented news and entertainment segments that were shown on television when CITI played music. On July 6, 2016,

1168-426: A positive, non-threatening way. This could be to encourage business investment in or tourism to the nation. Another reason is to combat a negative image produced by other nations or internal dissidents, or insurgents. Radio RSA , the broadcasting arm of the apartheid South African government, is an example of this. A third reason is to promote the ideology of the broadcaster. For example, a program on Radio Moscow from

1241-478: A sign-off sequence at a certain time in the night (usually between 10:00 p.m. and 1:00 a.m.) as a formality to signify the end of its operating day (in the United States, the broadcast logging day ends at 12:00 midnight local time). The sign-off sequence may include some or all of the following stages, but not necessarily in this order: Some countries have a legal protocol for signing-off: in

1314-460: A significant threat to the AM broadcasting industry. It required purchase of a special receiver. The frequencies used, 42 to 50 MHz, were not those used today. The change to the current frequencies, 88 to 108 MHz, began after the end of World War II and was to some extent imposed by AM broadcasters as an attempt to cripple what was by now realized to be a potentially serious threat. FM radio on

1387-411: A similar general pattern. It is common for sign-ons to be followed by a network's early morning newscast , or their morning or breakfast show . Some broadcasters that have ceased signing on and signing off in favour of 24-hour broadcasting may perform a sign-on sequence at a certain time in the morning (usually between 4:00 and 7:00 a.m.) as a formality to signify the start of its operating day (in

1460-545: A similar general pattern. Many stations follow the reverse process to their sign-on sequence at the start of the day. Many stations, while no longer conducting a sign-off and being off air for a period of time each day, instead run low-cost programming during those times of low viewer numbers. This may include infomercials , movies , television show reruns, simple weather forecasts , low cost news or infotainment programming from other suppliers, simulcasts of sister services, or feeds of local cable TV companies' programming via

1533-426: Is all that is necessary for a narrowband FM signal. The 200 kHz bandwidth allowed room for ±75 kHz signal deviation from the assigned frequency, plus guard bands to reduce or eliminate adjacent channel interference. The larger bandwidth allows for broadcasting a 15 kHz bandwidth audio signal plus a 38 kHz stereo "subcarrier" —a piggyback signal that rides on the main signal. Additional unused capacity

SECTION 20

#1732797691148

1606-421: Is little affected by daily changes in the ionosphere, so broadcasters need not reduce power at night to avoid interference with other transmitters. FM refers to frequency modulation , and occurs on VHF airwaves in the frequency range of 88 to 108 MHz everywhere except Japan and Russia . Russia, like the former Soviet Union , uses 65.9 to 74 MHz frequencies in addition to the world standard. Japan uses

1679-472: Is sometimes mandatory, such as in New Zealand, which uses 700 kHz spacing (previously 800 kHz). The improved fidelity made available was far in advance of the audio equipment of the 1940s, but wide interchannel spacing was chosen to take advantage of the noise-suppressing feature of wideband FM. Bandwidth of 200 kHz is not needed to accommodate an audio signal — 20 kHz to 30 kHz

1752-453: Is subject to interference from electrical storms ( lightning ) and other electromagnetic interference (EMI). One advantage of AM radio signal is that it can be detected (turned into sound) with simple equipment. If a signal is strong enough, not even a power source is needed; building an unpowered crystal radio receiver was a common childhood project in the early decades of AM broadcasting. AM broadcasts occur on North American airwaves in

1825-515: Is the broadcasting of audio (sound), sometimes with related metadata , by radio waves to radio receivers belonging to a public audience . In terrestrial radio broadcasting the radio waves are broadcast by a land-based radio station , while in satellite radio the radio waves are broadcast by a satellite in Earth orbit. To receive the content the listener must have a broadcast radio receiver ( radio ). Stations are often affiliated with

1898-420: Is the beginning of operations for a radio or television station , generally at the start of each day. It is the opposite of a sign-off (or closedown in Commonwealth countries except Canada), which is the sequence of operations involved when a radio or television station shuts down its transmitters and goes off the air for a predetermined period; generally, this occurs during the overnight hours although

1971-447: Is used by some broadcasters to transmit utility functions such as background music for public areas, GPS auxiliary signals, or financial market data. The AM radio problem of interference at night was addressed in a different way. At the time FM was set up, the available frequencies were far higher in the spectrum than those used for AM radio - by a factor of approximately 100. Using these frequencies meant that even at far higher power,

2044-531: The Bayernhymne was also played beforehand) and the European Union anthem . In Spain , it is a custom to play the national anthem (for RTVA , EITB and Televisión de Galicia , La bandera blanca y verde , Eusko Abendaren Ereserkia and Os Pinos was also played beforehand respectively). In a number of countries closedowns formerly took place during the daytime as well as overnight. In

2117-524: The Catholic Media Network prominently follow the latter pattern, broadcasting Paschal Triduum services and other similar programming. Campus radio stations ' operations during this time are left to the discretion of their respective schools, colleges, or universities by either closing down on the afternoon and/or evening of Holy Wednesday or remaining off-air for the entire Holy Week. On cable, satellite, and live TV streaming, with

2190-570: The Marconi Research Centre 2MT at Writtle near Chelmsford, England . A famous broadcast from Marconi's New Street Works factory in Chelmsford was made by the famous soprano Dame Nellie Melba on June 15, 1920, where she sang two arias and her famous trill. She was the first artist of international renown to participate in direct radio broadcasts. The 2MT station began to broadcast regular entertainment in 1922. The BBC

2263-803: The United Kingdom , this was initially due to government-imposed restrictions on daytime broadcasting hours, and later, due to budgetary constraints. The eventual relaxation of these rules meant that afternoon closedowns ceased permanently on the ITV network in October 1972, but the BBC maintained the practice until Friday 24 October 1986, before commencing a full daytime service on the following Monday. Afternoon closedowns continued in South Korea until December 2005. Hong Kong's broadcasting networks (particularly

CITI-FM - Misplaced Pages Continue

2336-516: The medium wave frequency range of 525 to 1,705 kHz (known as the "standard broadcast band"). The band was expanded in the 1990s by adding nine channels from 1,605 to 1,705 kHz. Channels are spaced every 10 kHz in the Americas , and generally every 9 kHz everywhere else. AM transmissions cannot be ionospheric propagated during the day due to strong absorption in the D-layer of

2409-702: The 1960s to the 1980s was What is Communism? A second reason is to advance a nation's foreign policy interests and agenda by disseminating its views on international affairs or on the events in particular parts of the world. During the Cold War the American Radio Free Europe and Radio Liberty and Indian Radio AIR were founded to broadcast news from "behind the Iron Curtain " that was otherwise being censored and promote dissent and occasionally, to disseminate disinformation . Currently,

2482-593: The 76 to 90 MHz frequency band. Edwin Howard Armstrong invented wide-band FM radio in the early 1930s to overcome the problem of radio-frequency interference (RFI), which plagued AM radio reception. At the same time, greater fidelity was made possible by spacing stations further apart in the radio frequency spectrum. Instead of 10 kHz apart, as on the AM band in the US, FM channels are 200 kHz (0.2 MHz) apart. In other countries, greater spacing

2555-594: The English-speaking channels) also practiced this until mid-2008. In these cases, the station's transmitters later did not actually shut-down for the afternoon break; either a test-card was played or a static schedule was posted telling viewers of the programming line-up once broadcasting resumes. In Indonesia, restrictions on broadcast hours were also implemented in July 2005 as part of an energy saving campaign. Three years later, they were implemented again due to

2628-660: The FM band in 2004 , and retained the CKY call sign on that station. That station now plays a hot AC format. CKY-FM was originally North America's most powerful commercial FM station. (That distinction currently belongs to WBCT in Grand Rapids, Michigan . Canada's most powerful FM station is CJKR-FM , also in Winnipeg.) In 2003 CITI-FM was granted a decrease in effective radiated power from 210,000 to 100,000 watts. Its transmitter

2701-506: The U.S. Federal Communications Commission designates the 88–92 megahertz band in the U.S. for non-profit or educational programming, with advertising prohibited. In addition, formats change in popularity as time passes and technology improves. Early radio equipment only allowed program material to be broadcast in real time, known as live broadcasting. As technology for sound recording improved, an increasing proportion of broadcast programming used pre-recorded material. A current trend

2774-759: The US and Canada , just two services, XM Satellite Radio and Sirius Satellite Radio exist. Both XM and Sirius are owned by Sirius XM Satellite Radio , which was formed by the merger of XM and Sirius on July 29, 2008, whereas in Canada , XM Radio Canada and Sirius Canada remained separate companies until 2010. Worldspace in Africa and Asia, and MobaHO! in Japan and the ROK were two unsuccessful satellite radio operators which have gone out of business. Radio program formats differ by country, regulation, and markets. For instance,

2847-862: The US and México. During religious holidays or occasions, Doordarshan and Akashvani will broadcast a prayer of any religion through the day, a week or a month (e.g. During Ramadan , a reading from the Quran, a Muslim quote, or a call for Azan and Fajr prayer will be broadcast. During Lent , a Christian prayer, a hymn or a psalm will be broadcast). In Bali during Nyepi , all terrestrial television and radio stations go off-the-air. During Yom Kippur , virtually all radio and television stations based in Israel go silent for 24 hours, as required by law. However, most international networks broadcast in Israel (e.g. CNN ) continue to broadcast as usual. During Ramadan , Malaysian public broadcaster RTM operated TV1 24 hours

2920-580: The US operates similar services aimed at Cuba ( Radio y Televisión Martí ) and the People's Republic of China , Vietnam , Laos and North Korea ( Radio Free Asia ). Besides ideological reasons, many stations are run by religious broadcasters and are used to provide religious education, religious music, or worship service programs. For example, Vatican Radio , established in 1931, broadcasts such programs. Another station, such as HCJB or Trans World Radio will carry brokered programming from evangelists. In

2993-628: The United States and Canada have chosen to use HD radio , an in-band on-channel system that puts digital broadcasts at frequencies adjacent to the analog broadcast. HD Radio is owned by a consortium of private companies that is called iBiquity . An international non-profit consortium Digital Radio Mondiale (DRM), has introduced the public domain DRM system, which is used by a relatively small number of broadcasters worldwide. Broadcasters in one country have several reasons to reach out to an audience in other countries. Commercial broadcasters may simply see

CITI-FM - Misplaced Pages Continue

3066-589: The United States came from KDKA itself: the results of the Harding/Cox Presidential Election . The Montreal station that became CFCF began broadcast programming on May 20, 1920, and the Detroit station that became WWJ began program broadcasts beginning on August 20, 1920, although neither held a license at the time. In 1920, wireless broadcasts for entertainment began in the UK from

3139-643: The United States, France, the Netherlands, South Africa, and many other countries worldwide. The simplest system is named DAB Digital Radio, for Digital Audio Broadcasting , and uses the public domain EUREKA 147 (Band III) system. DAB is used mainly in the UK and South Africa. Germany and the Netherlands use the DAB and DAB+ systems, and France uses the L-Band system of DAB Digital Radio. The broadcasting regulators of

3212-482: The United States, the broadcast logging day begins at 6:00 a.m. local time). The sign-on sequence may include some or all of the following stages, but not necessarily in this order: While most of these sign-on steps are done as a service to the public, or for advertising reasons, some of them may be required by the government of the country. Sign-offs, like sign-ons, vary from country to country, from station to station, and from time to time; however, most follow

3285-501: The United States, the minimum requirement is the station's call sign , followed by its designated city of license . Many stations do include other protocols, such as the national anthem or transmitter information, as a custom, or as a service to the public. In the United Kingdom, before the introduction of 24-hour television, there was no known legal protocol for a sign-off: BBC One and many ITV regions customarily included

3358-446: The background. Some stations, after doing a sign-off, nonetheless continue to transmit throughout the off-air period on cable/satellite; this transmission may involve a test pattern , static image, local weather radar display, teletext pages or full-page headlines which was accompanied by music or a local weather radio service. Some broadcasters that have ceased signing on and signing off in favour of 24-hour broadcasting may perform

3431-728: The case of the Broadcasting Services of the Kingdom of Saudi Arabia , both governmental and religious programming is provided. Extensions of traditional radio-wave broadcasting for audio broadcasting in general include cable radio , local wire television networks , DTV radio , satellite radio , and Internet radio via streaming media on the Internet . The enormous entry costs of space-based satellite transmitters and restrictions on available radio spectrum licenses has restricted growth of Satellite radio broadcasts. In

3504-722: The college teamed up with WLOE in Boston to have students broadcast programs. By 1931, a majority of U.S. households owned at least one radio receiver . In line to ITU Radio Regulations (article1.61) each broadcasting station shall be classified by the service in which it operates permanently or temporarily. Broadcasting by radio takes several forms. These include AM and FM stations. There are several subtypes, namely commercial broadcasting , non-commercial educational (NCE) public broadcasting and non-profit varieties as well as community radio , student-run campus radio stations, and hospital radio stations can be found throughout

3577-714: The company and the Carver Corporation later cut the number of models produced before discontinuing production completely. As well as on the medium wave bands, amplitude modulation (AM) is also used on the shortwave and long wave bands. Shortwave is used largely for national broadcasters, international propaganda, or religious broadcasting organizations. Shortwave transmissions can have international or inter-continental range depending on atmospheric conditions. Long-wave AM broadcasting occurs in Europe, Asia, and Africa. The ground wave propagation at these frequencies

3650-467: The country at night. During the night, absorption largely disappears and permits signals to travel to much more distant locations via ionospheric reflections. However, fading of the signal can be severe at night. AM radio transmitters can transmit audio frequencies up to 15 kHz (now limited to 10 kHz in the US due to FCC rules designed to reduce interference), but most receivers are only capable of reproducing frequencies up to 5 kHz or less. At

3723-486: The dominant medium, especially in cities. Because of its greater range, AM remained more common in rural environments. Pirate radio is illegal or non-regulated radio transmission. It is most commonly used to describe illegal broadcasting for entertainment or political purposes. Sometimes it is used for illegal two-way radio operation. Its history can be traced back to the unlicensed nature of the transmission, but historically there has been occasional use of sea vessels—fitting

SECTION 50

#1732797691148

3796-498: The electricity crisis. Medium wave radio is a special case due to its unusual propagation characteristics; it can bounce hundreds of miles by reflecting from the upper atmosphere at night, but during the day these same layers absorb signal instead of reflecting. A few powerful regional clear-channel stations have an extensive secondary coverage area which is protected by having smaller local co-channel stations in distant communities sign off shortly before sunset. A frequency on which

3869-442: The exception of specialty channels that broadcast horse racing , cockfighting , and the like that remain dormant during this period, most international networks distributed in the Philippines or Philippine-exclusive cable channels either continue to broadcast their 24/7 regular programming service week-long or provide specially-arranged schedules from Holy Thursday to Black Saturday. Radio broadcasting Radio broadcasting

3942-583: The highest and lowest sidebands is quite apparent to the listener. Such distortion occurs up to frequencies of approximately 50 MHz. Higher frequencies do not reflect from the ionosphere, nor from storm clouds. Moon reflections have been used in some experiments, but require impractical power levels. The original FM radio service in the U.S. was the Yankee Network , located in New England . Regular FM broadcasting began in 1939 but did not pose

4015-434: The increasing prevalence of 24/7 broadcasting. However, some national broadcasters continue the practice; particularly those in countries with limited broadcast coverage. Stations may also sometimes close for transmitter maintenance, or to allow another station to broadcast on the same channel space. Sign-ons, like sign-offs, vary from country to country, from station to station, and from time to time; however, most follow

4088-411: The ionosphere. In a crowded channel environment, this means that the power of regional channels which share a frequency must be reduced at night or directionally beamed in order to avoid interference, which reduces the potential nighttime audience. Some stations have frequencies unshared with other stations in North America; these are called clear-channel stations . Many of them can be heard across much of

4161-402: The most common perception of a pirate—as broadcasting bases. Rules and regulations vary largely from country to country, but often the term pirate radio describes the unlicensed broadcast of FM radio, AM radio, or shortwave signals over a wide range. In some places, radio stations are legal where the signal is transmitted, but illegal where the signals are received—especially when the signals cross

4234-441: The new band had to begin from the ground floor. As a commercial venture, it remained a little-used audio enthusiasts' medium until the 1960s. The more prosperous AM stations, or their owners, acquired FM licenses and often broadcast the same programming on the FM station as on the AM station (" simulcasting "). The FCC limited this practice in the 1960s. By the 1980s, since almost all new radios included both AM and FM tuners, FM became

4307-455: The range of a given FM signal was much shorter; thus its market was more local than for AM radio. The reception range at night is the same as in the daytime. All FM broadcast transmissions are line-of-sight, and ionospheric bounce is not viable. The much larger bandwidths, compared to AM and SSB, are more susceptible to phase dispersion. Propagation speeds are fastest in the ionosphere at the lowest sideband frequency. The celerity difference between

4380-475: The reverse direction because the plate was not heated, and thus not capable of thermionic emission of electrons. Later known as the Fleming valve , it could be used as a rectifier of alternating current, and as a radio wave detector . This greatly improved the crystal set , which rectified the radio signal using an early solid-state diode based on a crystal and a so-called cat's whisker . However, an amplifier

4453-410: The same service area. This prevents the sideband power generated by two stations from interfering with each other. Bob Carver created an AM stereo tuner employing notch filtering that demonstrated that an AM broadcast can meet or exceed the 15 kHz baseband bandwidth allotted to FM stations without objectionable interference. After several years, the tuner was discontinued. Bob Carver had left

SECTION 60

#1732797691148

4526-440: The station rebranded as 92.1 CITI , using a new standardized branding used by most Rogers-owned rock stations. In July 2018, Wheeler was fired by Rogers for having been involved in "multiple disciplinary incidents" on-air. His firing came in the wake of transphobic remarks Wheeler made during his morning show; during a segment, Wheeler discussed Scarlett Johansson having declined a starring role as gangster Dante "Tex" Gill in

4599-486: The station rebranded itself as "World Class Rock" and began playing more 1980s, ’90s and 2000s-based rock . On September 13, 2012, CITI announced that longtime morning show hosts Tom McGouran and Joe Aiello had been let go, and would be replaced with Dave Wheeler, Phil Aubrey and Rena Jae, formerly of rival station CJKR-FM . The latter three, having comprised the morning show of Wheeler In The Morning with Philly and Rena since September 2009, were unable to come to terms on

4672-534: The station was moved to the top of the Westinghouse factory building in East Pittsburgh, Pennsylvania . Westinghouse relaunched the station as KDKA on November 2, 1920, as the first commercially licensed radio station in the United States. The commercial broadcasting designation came from the type of broadcast license ; advertisements did not air until years later. The first licensed broadcast in

4745-669: The third week of April (depending on the Roman Catholic liturgical calendar ), terrestrial television and radio stations continue their regular schedules from Palm Sunday until Holy Wednesday . From the midnight of Holy Thursday until the early hours of Easter Sunday (before 4 AM PHT ), most commercial television and radio networks either remain off-the-air or reduce their broadcast hours. Stations that opt to remain on-air provide special programming such as Lenten drama specials, news coverage of various services and rites, Christian and mellow music content. Member stations of

4818-408: The time that AM broadcasting began in the 1920s, this provided adequate fidelity for existing microphones, 78 rpm recordings, and loudspeakers. The fidelity of sound equipment subsequently improved considerably, but the receivers did not. Reducing the bandwidth of the receivers reduces the cost of manufacturing and makes them less prone to interference. AM stations are never assigned adjacent channels in

4891-519: The world. Many stations broadcast on shortwave bands using AM technology that can be received over thousands of miles (especially at night). For example, the BBC , VOA , VOR , and Deutsche Welle have transmitted via shortwave to Africa and Asia. These broadcasts are very sensitive to atmospheric conditions and solar activity. Nielsen Audio , formerly known as Arbitron, the United States –based company that reports on radio audiences, defines

4964-530: Was amalgamated in 1922 and received a Royal Charter in 1926, making it the first national broadcaster in the world, followed by Czechoslovak Radio and other European broadcasters in 1923. Radio Argentina began regularly scheduled transmissions from the Teatro Coliseo in Buenos Aires on August 27, 1920, making its own priority claim. The station got its license on November 19, 1923. The delay

5037-513: Was carrying audio by the next year. (Herrold's station eventually became KCBS ). In The Hague, the Netherlands, PCGG started broadcasting on November 6, 1919, making it arguably the first commercial broadcasting station. In 1916, Frank Conrad , an electrical engineer employed at the Westinghouse Electric Corporation , began broadcasting from his Wilkinsburg, Pennsylvania garage with the call letters 8XK. Later,

5110-460: Was due to the lack of official Argentine licensing procedures before that date. This station continued regular broadcasting of entertainment, and cultural fare for several decades. Radio in education soon followed, and colleges across the U.S. began adding radio broadcasting courses to their curricula. Curry College in Milton, Massachusetts introduced one of the first broadcasting majors in 1932 when

5183-537: Was quickly becoming viable. However, an early audio transmission that could be termed a broadcast may have occurred on Christmas Eve in 1906 by Reginald Fessenden , although this is disputed. While many early experimenters attempted to create systems similar to radiotelephone devices by which only two parties were meant to communicate, there were others who intended to transmit to larger audiences. Charles Herrold started broadcasting in California in 1909 and

5256-494: Was still required. The triode (mercury-vapor filled with a control grid) was created on March 4, 1906, by the Austrian Robert von Lieben ; independently, on October 25, 1906, Lee De Forest patented his three-element Audion . It was not put to practical use until 1912 when its amplifying ability became recognized by researchers. By about 1920, valve technology had matured to the point where radio broadcasting

5329-430: Was then relocated 20 kilometers north of its former site. Some notable announcers through the years at CITI are: Ross Porter (Murray), Brother Jake Edwards, Terry Klassen, Terry Dimonte, Andy Frost, Howard Mandshein, Craig Thulner, Tim "Trucker" Bradley, Gordo Fry, Lamont Hollywood, Shadoe Davis, Tom McGouran, Alix Michaels, Larry Updike, Joe Aiello, Harry Callaghan, Brian Cook, Duncan MacPhail and Cosmo. On May 17, 2012,

#147852