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A clear-channel station is a North American AM radio station that has the highest level of protection from interference from other stations, particularly from nighttime skywave signals. This classification exists to ensure the viability of cross-country or cross-continent radio service enforced through a series of treaties and statutory laws. Known as Class A stations since the 1983 adoption of the Regional Agreement for the Medium Frequency Broadcasting Service in Region 2, they are occasionally still referred to by their former classifications of Class I-A, Class I-B, or Class I-N. The term "clear-channel" is used most often in the context of North America and the Caribbean, where the concept originated.
The FM broadcast band is a range of radio frequencies used for FM broadcasting by radio stations. The range of frequencies used differs between different parts of the world. In Europe and Africa and in Australia and New Zealand, it spans from 87.5 to 108 megahertz (MHz) - also known as VHF Band II - while in the Americas it ranges from 88 to 108 MHz. The FM broadcast band in Japan uses 76 to 95 MHz, and in Brazil, 76 to 108 MHz. The International Radio and Television Organisation (OIRT) band in Eastern Europe is from 65.9 to 74.0 MHz, although these countries now primarily use the 87.5 to 108 MHz band, as in the case of Russia. Some other countries have already discontinued the OIRT band and have changed to the 87.5 to 108 MHz band.
WSB is a commercial AM radio station in Atlanta, Georgia. It airs a talk radio radio format, simulcast on Doraville-licensed WSBB-FM. WSB is the flagship station for Cox Media Group; in addition to WSB and WSBB-FM, it owns three other Atlanta radio stations and Atlanta's ABC Television Network affiliate, WSB-TV. From 1939 to 2019, WSB was owned by Cox Enterprises along with the Atlanta Journal-Constitution daily newspaper; the station had been established by the Journal in 1922. The station's studios and offices are located at the WSB Television and Radio Group building on West Peachtree Street in Midtown Atlanta, which is shared with its television and radio partners.
KKOB is a commercial AM radio station, licensed to Albuquerque, New Mexico and owned by Cumulus Media. Its news/talk format is branded as "96.3 Newsradio KKOB", reflecting a simulcast with co-owned KKOB-FM 96.3 MHz. Studios and offices are located in Downtown Albuquerque. KKOB is the oldest station in New Mexico and is the state's primary entry point for the Emergency Alert System.
KXLY is a commercial AM radio station in Spokane, Washington. It broadcasts a news/talk radio format with the branding "920 News Now". The station is owned by QueenB Radio, with its license held by Morgan Murphy Media.
WBAP is an AM news/talk radio station licensed to Fort Worth, Texas, and serving the Dallas-Fort Worth Metroplex. WBAP is owned by Cumulus Media and broadcasts with 50,000 watts from a transmitter site in the northwest corner of Mansfield. Its programming is also simulcast on WBAP-FM (93.3) in Haltom City.
KFAB is a commercial AM radio station in Omaha, Nebraska, with studios and offices on Underwood Avenue in Omaha. It broadcasts a news/talk format and is owned by iHeartMedia, Inc.
KFBK is a commercial AM radio station in Sacramento, California. It is simulcast on KFBK-FM 93.1 MHz. KFBK-AM-FM air a news-talk radio format and are owned by iHeartMedia, Inc. The studios and offices are on River Park Drive in North Sacramento, near the Arden Fair Mall.
WISN is a commercial AM radio station in Milwaukee, Wisconsin. It broadcasts a news/talk radio format and is owned by iHeartMedia, Inc. The studios are on Howard Avenue in the Milwaukee suburb of Greenfield.
WOAI is a commercial AM radio station in San Antonio, Texas, which airs a news/talk format. It is owned and operated by locally based iHeartMedia, Inc., and is that company's flagship station. Studios are located in the Stone Oak neighborhood in Far North San Antonio. Its non-directional antenna transmitter site is off Santa Clara Road in Zuehl, Texas.
The North American Regional Broadcasting Agreement refers to a series of international treaties that defined technical standards for AM band (mediumwave) radio stations. These agreements also addressed how frequency assignments were distributed among the signatories, with a special emphasis on high-powered clear channel allocations.
KGNC is an AM radio broadcast station in Amarillo, Texas, United States with a news/talk format. The station is owned by Alpha Media LLC. Studios for KGNC and its partners are located in southwest Amarillo near the former Western Plaza shopping center. KGNC's programming is also broadcast on 97.5 FM by translator K248DE in Amarillo.
The Federal Radio Commission's (FRC) General Order 40, dated August 30, 1928, described the standards for a sweeping reorganization of radio broadcasting in the United States. This order grouped the AM radio band transmitting frequencies into three main categories, which became known as Clear Channel, Regional, and Local. It also included provisions for coordination with Canadian station assignments. The majority of the reassignments resulting from the plan's implementation went into effect on November 11, 1928.
KTRH is a commercial radio station licensed to Houston, Texas. It airs a news/talk radio format and is owned by iHeartMedia, Inc. Its studios are along the West Loop Freeway (I-610) in the city's Uptown district. The transmitter site, a four-tower array, is in unincorporated Liberty County, off Cox Road in Dayton. KTRH is one of the oldest radio stations in the United States, first licensed to Austin on April 22, 1922. Programming is also heard on co-owned KODA's HD 2 subchannel at 99.1MHz, and on the iHeartRadio platform. KTRH is Southeast Texas' primary entry point station for the Emergency Alert System.
ABC Northern Tasmania is the ABC Local Radio station for northern Tasmania, based in Launceston, owned by the Australian Broadcasting Corporation. It broadcasts on the frequency of 91.7 MHz on the FM band from Mount Barrow at a power of 192 kW which covers much of Northern Tasmania.
ABC North and West SA is a local radio station based in Port Pirie, South Australia, owned by the Australian Broadcasting Corporation. Its callsign is 5CK and is transmitted on the AM band from high power transmitters situated near Crystal Brook.
KNTS is a commercial AM radio station licensed to Seattle, Washington. Along with sister station KKDZ 1250 AM, it simulcasts a format of South Asian music and talk from the Radio Punjab network. It is owned by the Baaz Broadcasting Corporation, with offices on 104th Avenue SE in Kent.
Copies of the World Radio TV Handbook have identified 1602 kHz as a local frequency, akin to the Class C radio stations in North America which are limited to 1kW.
The following radio stations broadcast on AM frequency 1215 kHz:
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