WBBM (AM)

WBBM
Chicago, Illinois; United States;
Broadcast area	Chicago metropolitan area
Frequency	780 kHz
Branding	Newsradio 105.9 WBBM
Programming
Language	English
Format	All-news radio
Affiliations	CBS News Radio; Bloomberg Radio; WBBM-TV;
Ownership
Owner	Audacy, Inc.; (Audacy License, LLC);
Sister stations	WBBM-FM, WBMX, WCFS-FM, WSCR, WUSN, WXRT
History
First air date	February 6, 1924
Call sign meaning	None (sequentially assigned), but founder Frank Atlass announced that they stood for "We Broadcast Better Music"
Technical information
Licensing authority	FCC
Facility ID	9631
Class	A
Power	35,000 watts (day); 42,000 watts (night);
Transmitter coordinates	41°56′3.11″N 88°4′22.25″W / 41.9341972°N 88.0728472°W (main); 41°56′18″N 87°45′5″W / 41.93833°N 87.75139°W (aux);
Repeater(s)	105.9 WCFS-FM (Elmwood Park)
Links
Public license information	Public file; LMS;
Webcast	Listen live (via Audacy)
Website	www.audacy.com/wbbm780

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 35,000 watts by day and 42,000 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 broadcasts over HD Radio using the in-band on-channel standard, is simulcast over WCFS-FM (105.9), and is available online via Audacy.