WBBM (AM)

Common card · No. 454476

WBBM (780 kHz) – branded Newsradio 105.9 WBBM – is a commercial all-news AM radio station licensed to serve Chicago, Illinois. Owned by Audacy, Inc., its studios are located at Two Prudential Plaza in the Chicago Loop, while the station's transmitter—diplexed with sister station WSCR—is in the nearby suburb of Bloomingdale. WBBM is a Class A station that broadcasts on a clear-channel AM frequency, powered with 45,000 watts by day and 43,000 watts at night, using a non-directional antenna. Its daytime signal provides at least grade B coverage to most of the northern two-thirds of Illinois (as far south as Springfield) as well as large portions of Wisconsin, Iowa, Michigan and Indiana. Its city-grade coverage reaches as far north as Milwaukee. At night, WBBM can be heard across much of North America under favorable conditions, but is strongest in the Midwest. In addition to a standard analog transmission, WBBM is simulcast over WCFS-FM (105.9), and is available online via Audacy.

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