Studios and offices are located on North Water Street and the transmitter site is near St. Louis Bridge Road, sharing the same tower as WDZ.

On April 25, 1922, a license was issued to James Millikin University for a new broadcasting station operating on a wavelength of 360 meters (833 kHz).

[14][10] On May 25, 1928, the recently formed Federal Radio Commission (FRC) issued General Order 32, which notified 164 stations, including WBAO, that "From an examination of your application for future license it does not find that public interest, convenience, or necessity would be served by granting it.

[16] WBAO was formally deleted on October 1, 1928,[10][17] and it was announced that programs previously broadcast by that station would now be heard over WJBL.

[13] As was the case with WBAO, WJBL was included on the May 25, 1928 list of stations in General Order 32, that were required to justify their continued existence.

"[16] On November 11, 1928, as part of a major reallocation due to the implementation of the FRC's General Order 40, WSOY moved to a "local" frequency of 1200 kHz, on a timesharing basis with WJBC in LaSalle.

[22] In 1929, Commodore Broadcasting was formed and took ownership of WJBL, and the station's studios were moved to the Hotel Orlando, although in 1934 they returned to the Gushard Building.

[24] On November 12, 1939, the call sign was changed to WSOY, a reference to soybeans, which are a major agricultural crop in the region.

[34] On February 1, 2024, Neuhoff Media sold radio stations in Danville and Decatur IL to Champaign Multimedia Group for $2 million and has since closed in May 2024.