WBMX

The station began broadcasting in September 1953, holding the call sign WSEL. It aired beautiful music, light classical music, recorded music and show tunes along with news reports."WSEL, New FM Station, Lists Music, News", Chicago Tribune. September 6, 1953. Part 3, p. 2. The station had an ERP of 40,000 watts, and its transmitter was located atop Chicago's Randolph Tower. WSEL was owned by Chicago Skyway Broadcasting Company.

A previous station in Chicago had briefly operated on 104.3 MHz in 1949. WCFL-FM, owned by the Chicago Federation of Labor, broadcast from 3 to 9 p.m. as a 400-watt simulcast of WCFL, but the owners surrendered the station's license, as it was not profitable.{{cite magazine|url=https://books.google.com/books?id=Lg4EAAAAMBAJ&pg=PT5|title=Chi FM Bumped; 1 Outlet Folds, Prexy Out in 2nd|magazine=The Billboard|date=October 22, 1949|page=6|volume=63|number=43|location=Cincinnati, Ohio|access-date=January 20, 2019|archive-date=April 7, 2022|archive-url=https://web.archive.org/web/20220407160748/https://books.google.com/books?id=Lg4EAAAAMBAJ&pg=PT5|url-status=live}}

In 1958, WSEL's transmitter was moved to the Willoughby Tower at 8 South Michigan Avenue. In 1960, the station was sold to Plough Broadcasting for $50,000, and it was taken silent."[https://www.americanradiohistory.com/Archive-BC/BC-1960/BC-1960-07-04.pdf Changing Hands]", Broadcasting. July 4, 1960. p. 46. Retrieved January 20, 2019.

The station returned to the air January 2, 1961, with its call sign changed to WJJD-FM.[https://www.americanradiohistory.com/Archive-BC-YB/1963/B%20A-M%20Radio%20Broadcasting%20Yearbook%201963.pdf 1963 Broadcasting Yearbook], Broadcasting, 1963. p. B-56. Retrieved January 20, 2019. It was co-owned with 1160 WJJD by Plough Broadcasting. At the time, 1160 WJJD was a daytimer. WJJD-FM initially aired classical music, show tunes, folk music, and jazz."[https://www.americanradiohistory.com/Archive-US-Radio/61/U-S-Radio-1961-Jan.pdf Additional Stations Turn to I.G.M.'s Automated FM]", U.S. Radio. January 1961. p. 1. Retrieved February 16, 2019."[https://www.americanradiohistory.com/Archive-US-Radio/61/U-S-Radio-1961-Sep.pdf FM Station Key]", U.S. Radio. September 1961. p. 65. Retrieved February 16, 2019.

On February 15, 1965, WJJD adopted a country music format, and WJJD-FM simulcast 1160 WJJD, with WJJD-FM continuing WJJD's country programming after sunset."[https://www.americanradiohistory.com/Archive-Billboard/60s/1965/Billboard%201965-01-30.pdf Plough's WJJD to Go Country Format] {{Webarchive|url=https://web.archive.org/web/20211107055038/https://worldradiohistory.com/Archive-All-Music/Billboard/60s/1965/Billboard%201965-01-30.pdf |date=2021-11-07 }}", Billboard. January 30, 1965. pp. 3 & 42. Retrieved January 20, 2019.Brack, Ray. "[https://www.americanradiohistory.com/Archive-Billboard/60s/1965/Billboard%201965-10-16.pdf WJJD Format Boosts Country]", Billboard. October 16, 1965. pp. 3, 60, & 62. Retrieved January 20, 2019."[https://www.americanradiohistory.com/Archive-Billboard/60s/1965/Billboard%201965-10-16.pdf Stations By Format]", Billboard. October 16, 1965. p. 62. Retrieved January 20, 2019.

In 1971, the station's transmitter was moved to the Prudential Building, and its ERP was reduced to 14,100 watts.

In February 1977, the station's call sign was changed to WJEZ'. The station adopted a "beautiful country" format, playing easy listening country music, with large amount of instrumentals, in an approach patterned on the beautiful music format."[https://www.americanradiohistory.com/Archive-Billboard/70s/1977/Billboard%201977-02-26.pdf WJJD-FM Out; New Country In]", Billboard. February 26, 1977. p. 18. Retrieved January 20, 2019."[https://www.americanradiohistory.com/Archive-RandR/1970s/1977/RR-1977-12-23.pdf Radio News 1977]", Radio & Records. December 23, 1977. p. 14. Retrieved January 20, 2019.Penchansky, Alan. "[https://www.americanradiohistory.com/Archive-Billboard/70s/1978/Billboard%201978-12-23.pdf In Chicago, WJEZ -FM Going After Highly Rated WMAQ-AM]", Billboard. December 23, 1978. pp. 38, 58. Retrieved January 20, 2019.

In September 1978, the station adopted a "modern country" format, with a playlist that was approximately 80% country, 20% adult contemporary.Hall, Doug. "[https://www.americanradiohistory.com/Archive-Billboard/70s/1978/Billboard%201978-09-30.pdf Vox Jox]", Billboard. September 30, 1978. p. 30. Retrieved January 20, 2019."[https://www.americanradiohistory.com/Archive-RandR/1970s/1978/RR-1978-12-15.pdf 1978 Country Review]", Radio & Records. December 15, 1978. p. 77. Retrieved January 20, 2019."[https://www.americanradiohistory.com/Archive-Station-Albums/Chicago-Trib-1979-Mar-About-Chi-Radio.pdf Stations, everywhere: a listeners' guide to the AM and FM bands]", Chicago Tribune Magazine, March 4, 1979. p. 37. Retrieved January 20, 2019. The station was branded "Z-104". In 1982, WJEZ gained competition as WUSN also adopted a country format.Kirby, Kip. "[https://books.google.com/books?id=-yMEAAAAMBAJ&pg=PT19 Country Clicks for WUSN] {{Webarchive|url=https://web.archive.org/web/20200216230853/https://books.google.com/books?id=-yMEAAAAMBAJ&pg=PT19 |date=2020-02-16 }}", Billboard. July 3, 1982. pp. 20, 49. Retrieved January 20, 2019. At that point, WJJD 1160 adopted an adult standards format, known as "The Music Of Your Life". In 1984, Infinity Broadcasting acquired WJEZ and WJJD for $13.5 million."[https://www.americanradiohistory.com/Archive-RandR/1980s/1984/RR-1984-03-23.pdf Infinity on the Move]", Radio & Records. March 23, 1984. p. 1. Retrieved January 20, 2019.[https://licensing.fcc.gov/cgi-bin/ws.exe/prod/cdbs/pubacc/prod/comment.pl?Application_id=67997&File_number=BALH-19840326GS Public Notice Comment - BALH-19840326GS] {{Webarchive|url=https://web.archive.org/web/20190121133212/https://licensing.fcc.gov/cgi-bin/ws.exe/prod/cdbs/pubacc/prod/comment.pl?Application_id=67997&File_number=BALH-19840326GS |date=January 21, 2019 }}, fcc.gov. Retrieved January 20, 2019.[https://licensing.fcc.gov/cgi-bin/ws.exe/prod/cdbs/pubacc/prod/app_det.pl?Application_id=67997 Application Search Details - BALH-19840326GS] {{Webarchive|url=https://web.archive.org/web/20190121130943/https://licensing.fcc.gov/cgi-bin/ws.exe/prod/cdbs/pubacc/prod/app_det.pl?Application_id=67997 |date=January 21, 2019 }}, fcc.gov. Retrieved January 20, 2019.

File:Oldies 104.3 WJMK logo.png

In early August 1984, the station adopted an oldies format as "Magic 104" and its call sign was changed to WJMK."[https://www.americanradiohistory.com/Archive-RandR/1980s/1984/RR-1984-08-03.pdf WJEZ Switches to Gold Format] {{Webarchive|url=https://web.archive.org/web/20240203095255/https://www.worldradiohistory.com/Archive-All-Music/Archive-RandR/1980s/1984/RR-1984-08-03.pdf |date=2024-02-03 }}", Radio & Records. August 3, 1984. pp. 3, 32. Retrieved January 21, 2019.{{cite web|url=http://wjmk.com:80/showdj.asp?DJID=1077|archive-url=https://web.archive.org/web/20000607023705/http://wjmk.com:80/showdj.asp?DJID=1077|title=Dick Biondi|publisher=WJMK|access-date=January 21, 2019|archive-date=June 7, 2000|url-status=dead}} Dick Biondi was the first disc jockey heard on "Magic 104". Ron Britain was also one of WJMK's original DJs. Initially, "Magic 104" included a few currents in its playlist, but by early 1985, all songs from the current decade were dropped, with the station playing music from the 1950s, 1960s, and early 1970s.[https://www.americanradiohistory.com/Archive-Other-Documments/Chicago_Magazine/Chicago-Radio-Guide-May-1985.pdf Chicago Radio Guide] {{Webarchive|url=https://web.archive.org/web/20240203095254/https://www.worldradiohistory.com/Archive-Other-Documments/Chicago_Magazine/Chicago-Radio-Guide-May-1985.pdf |date=February 3, 2024 }}. Vol. 1, No. 1. May 1985. Retrieved January 21, 2019."[https://www.americanradiohistory.com/Archive-Other-Documments/Chicago_Magazine/Chicago-1989-Fall.pdf WYLL FM 106.7] {{Webarchive|url=https://web.archive.org/web/20240203095253/https://www.worldradiohistory.com/Archive-Other-Documments/Chicago_Magazine/Chicago-1989-Fall.pdf |date=2024-02-03 }}", Radio Chicago. Fall 1989. p. 35. Retrieved January 21, 2019.

In 1987, the station's transmitter was moved to the Sears Tower, and its ERP was reduced to 4,100 watts.[https://licensing.fcc.gov/cgi-bin/ws.exe/prod/cdbs/pubacc/prod/comment.pl?Application_id=76229&File_number=BPH-19850219IC Public Notice Comment - BPH-19850219IC] {{Webarchive|url=https://web.archive.org/web/20190123130657/https://licensing.fcc.gov/cgi-bin/ws.exe/prod/cdbs/pubacc/prod/comment.pl?Application_id=76229&File_number=BPH-19850219IC |date=January 23, 2019 }}, fcc.gov. Retrieved January 22, 2019.[https://licensing.fcc.gov/cgi-bin/ws.exe/prod/cdbs/pubacc/prod/comment.pl?Application_id=100941&File_number=BLH-19870506KJ Public Notice Comment - BLH-19870506KJ] {{Webarchive|url=https://web.archive.org/web/20190123125810/https://licensing.fcc.gov/cgi-bin/ws.exe/prod/cdbs/pubacc/prod/comment.pl?Application_id=100941&File_number=BLH-19870506KJ |date=January 23, 2019 }}, fcc.gov. Retrieved January 22, 2019.

In 1991, the station's moniker was changed to "Oldies 104.3".Ross, Sean; Rosen, Craig; Stark, Phyllis. "[https://www.americanradiohistory.com/Archive-Billboard/90s/1991/BB-1991-06-01.pdf Vox Jox] {{Webarchive|url=https://web.archive.org/web/20240203095254/https://www.worldradiohistory.com/Archive-All-Music/Billboard/90s/1991/BB-1991-06-01.pdf |date=2024-02-03 }}", Billboard. June 1, 1991. p. 16. Retrieved January 21, 2019. In early September 1993, John Records Landecker joined WJMK as morning drive DJ, remaining with the station until 2003.Kening, Dan. "[https://www.chicagotribune.com/news/ct-xpm-1994-01-11-9401110061-story.html `Big 89' Star John Landecker Back On The Air At WJMK] {{Webarchive|url=https://web.archive.org/web/20190121090854/https://www.chicagotribune.com/news/ct-xpm-1994-01-11-9401110061-story.html |date=2019-01-21 }}", Chicago Tribune. January 11, 1994. Retrieved January 21, 2019."[https://www.allaccess.com/top40-mainstream/10-questions/archive/15830/10-questions-with-john-records-landecker 10 Questions with ... John Records Landecker] {{Webarchive|url=https://web.archive.org/web/20180823110030/https://www.allaccess.com/top40-mainstream/10-questions/archive/15830/10-questions-with-john-records-landecker |date=2018-08-23 }}", All Access Music Group. March 19, 2013. Retrieved January 21, 2019.

In 1996, Infinity Broadcasting was purchased by the parent company of CBS."[https://www.latimes.com/archives/la-xpm-1997-02-06-fi-25879-story.html Westinghouse to Change Name to CBS After Spinoff] ", Bloomberg News. Los Angeles Times. February 6, 1997. Retrieved January 21, 2019.

In 1999, with competition from the new Jammin' Oldies format of WUBT, WJMK increased the number of 1970s songs playing 3 to 4 per hour on the station while reducing the number of 1950s songs to about 2 per hour, and playing a total number of pre-1964 to about 3 per hour. The station added several dozen 80s songs playing about 1 every 2 hours.Kirk, Jim. "[https://www.chicagotribune.com/news/ct-xpm-2000-05-14-0005140256-story.html WJMK's Makeover Helping it Face Down Rival WUBT on Oldies Front] {{Webarchive|url=https://web.archive.org/web/20190121084813/https://www.chicagotribune.com/news/ct-xpm-2000-05-14-0005140256-story.html |date=2019-01-21 }}", Chicago Tribune. May 14, 2000. Retrieved January 21, 2019. By 2002, the station had replaced the All Request Saturday Night oldies show with a 1970s and early 80s program.{{cite web|url=http://www.wjmk.com:80/personalities.asp|archive-url=https://web.archive.org/web/20010331082502/http://www.wjmk.com:80/personalities.asp|title=Oldies 104.3 Personalities|publisher=WJMK|access-date=January 21, 2019|archive-date=March 31, 2001|url-status=dead}}{{cite web|url=http://wjmk.com|archive-url=https://web.archive.org/web/20020326232040/http://wjmk.com:80/|title=Lisa Greene|publisher=WJMK|access-date=January 21, 2019|archive-date=March 26, 2002|url-status=dead}}"[https://www.allaccess.com/net-news/archive/story/36182/fresh-105-9-adds-lebaron-and-greene Fresh 105.9 Adds LeBaron And Greene] {{Webarchive|url=https://web.archive.org/web/20190121175154/https://www.allaccess.com/net-news/archive/story/36182/fresh-105-9-adds-lebaron-and-greene |date=2019-01-21 }}", All Access Music Group. February 14, 2008. Retrieved January 21, 2019.

On February 15, 2002, WJMK returned to its former moniker, "Magic 104.3", and its playlist was shifted to include more 1980s music, while further reducing the music played from the '50s and early '60s.{{cite news|last=Feder|first=Robert|author-link=Robert Feder|url=https://www.highbeam.com/doc/1P2-1428354.html|archive-url=https://web.archive.org/web/20160911111110/https://www.highbeam.com/doc/1P2-1428354.html|title='Magic' is coming back to oldies station WJMK|newspaper=Chicago Sun-Times|date=February 13, 2002|access-date=January 21, 2019|archive-date=September 11, 2016|url-status=dead}}{{cite news|last=Feder|first=Robert|author-link=Robert Feder|url=https://www.highbeam.com/doc/1P2-1494507.html|archive-url=https://web.archive.org/web/20180312083908/https://www.highbeam.com/doc/1P2-1494507.html|title=WJMK 'growing up' with oldies audience|newspaper=Chicago Sun-Times|date=July 24, 2003|access-date=January 21, 2019|archive-date=March 12, 2018|url-status=dead}} In July 2003, the station once again changed monikers, going back to "Oldies 104.3" and its playlist was refocused on music of the '60s and '70s.{{cite web|url=http://wjmk.com|archive-url=https://web.archive.org/web/20030921190519/http://wjmk.com:80/|title=About Oldies 104.3|publisher=WJMK|access-date=January 21, 2019|archive-date=September 21, 2003|url-status=dead}} In 2004, the station dropped the "Oldies" moniker and became known simply as "104.3 WJMK" with the slogan "The Greatest Hits of the 60s and 70s".{{cite web|url=http://www.wjmk.com|archive-url=https://web.archive.org/web/20041130093022/http://www.wjmk.com:80/|title=104.3 WJMK|publisher=WJMK|access-date=January 21, 2019|archive-date=November 30, 2004|url-status=dead}}

On June 3, 2005, at 4{{nbsp}}pm, WJMK switched to an adult hits format known as "Jack FM". On the same day, veteran oldies station WCBS-FM in New York City made the same switch exactly one hour later at 5 pm.Schmeltzer, John. "[https://www.chicagotribune.com/news/ct-xpm-2005-06-07-0506070285-story.html Random radio fights back with 'Jack FM'] {{Webarchive|url=https://web.archive.org/web/20190122144949/https://www.chicagotribune.com/news/ct-xpm-2005-06-07-0506070285-story.html |date=2019-01-22 }}", Chicago Tribune. June 7, 2005. Retrieved January 22, 2019.{{cite news|last=Feder|first=Robert|author-link=Robert Feder|url=http://www.suntimes.com:80/output/feder/cst-fin-feder04.html|archive-url=https://web.archive.org/web/20050609012944/http://www.suntimes.com:80/output/feder/cst-fin-feder04.html|title=Oldies station hits the road for 'Jack'|newspaper=Chicago Sun-Times|date=June 4, 2005|access-date=January 22, 2019|archive-date=June 9, 2005|url-status=dead}} The station had a 1980s centric playlist, along with some titles from the 1960s, 1970s, 1990s, and 2000s. It usually had no live DJs and instead used sarcastic remarks voiced by Howard Cogan during breaks.[http://transcripts.cnn.com/TRANSCRIPTS/0508/19/sbt.01.html Showbiz Tonight Transcript] {{Webarchive|url=https://web.archive.org/web/20190126071955/http://transcripts.cnn.com/TRANSCRIPTS/0508/19/sbt.01.html |date=January 26, 2019 }}, Showbiz Tonight. CNN Headline News. August 19, 2005. Retrieved January 22, 2019.

Though WJMK's previous oldies format continued to be streamed online and on the WJMK's second HD Radio subchannel, complaints about WJMK's switch were numerous.{{cite news|last=Feder|first=Robert|author-link=Robert Feder|url=http://www.suntimes.com:80/output/feder/cst-fin-feder07.html|archive-url=https://web.archive.org/web/20050609015100/http://www.suntimes.com:80/output/feder/cst-fin-feder07.html|title=Why oldies station didn't have to die|newspaper=Chicago Sun-Times|date=June 7, 2005|access-date=January 22, 2019|archive-date=June 9, 2005|url-status=dead}}Feder, Robert. "[https://www.pressreader.com/usa/chicago-sun-times/20061102/282445639554489 Legendary Dick Biondi Back to Spinning Oldies] {{Webarchive|url=https://web.archive.org/web/20190122144949/https://www.pressreader.com/usa/chicago-sun-times/20061102/282445639554489 |date=2019-01-22 }}", Chicago Sun-Times. November 2, 2006. Retrieved January 22, 2019.Sotonoff, Jamie. "[https://www.dailyherald.com/entlife/20171025/an-oldie-and-a-goodie---legendary-chicago-dj-dick-biondi An oldie and a goodie - legendary Chicago DJ Dick Biondi] {{Webarchive|url=https://web.archive.org/web/20190123010159/https://www.dailyherald.com/entlife/20171025/an-oldie-and-a-goodie---legendary-chicago-dj-dick-biondi |date=2019-01-23 }}", Daily Herald. December 7, 2006. Retrieved January 22, 2019. In July 2006, in a cost-cutting move by CBS Radio, the entire DJ staff of WJMK-HD2 was laid off. Shortly thereafter, 94.7 WZZN, which had recently switched to an oldies format, hired several of WJMK's former airstaff.

With a format change on WCKG from hot talk to adult contemporary, Steve Dahl and Buzz Kilman moved to WJMK to host mornings on November 5, 2007.Rosenthal, Phil. "[https://www.chicagotribune.com/news/ct-xpm-2007-10-31-0710300565-story.html Dahl-Meier reunion talk still only that] {{Webarchive|url=https://web.archive.org/web/20190122145028/https://www.chicagotribune.com/news/ct-xpm-2007-10-31-0710300565-story.html |date=2019-01-22 }}", Chicago Tribune. October 31, 2007. Retrieved January 22, 2019. Dahl was dismissed on December 5, 2008.Rosenthal, Phil. "[https://newsblogs.chicagotribune.com/towerticker/2008/12/steve-dahl-out.html Steve Dahl out at CBS' WJMK-FM] {{Webarchive|url=https://web.archive.org/web/20190122152004/https://newsblogs.chicagotribune.com/towerticker/2008/12/steve-dahl-out.html |date=2019-01-22 }}", Chicago Tribune. December 5, 2008. Retrieved January 22, 2019. With the exception of Dahl and Kilman, Chicago's Jack FM had no live personalities.{{cite magazine|last=Feder|first=Robert|author-link=Robert Feder|url=http://feder.blogs.chicago.timeout.com/2011/03/09/hit-the-road-jack-eddie-jobo-will-host-mornings-on-new-k-hits/|archive-url=https://web.archive.org/web/20110517111253/http://feder.blogs.chicago.timeout.com/2011/03/09/hit-the-road-jack-eddie-jobo-will-host-mornings-on-new-k-hits/|title=Hit the road, Jack: Eddie & Jobo will host mornings on new K-Hits|magazine=Time Out Chicago|date=March 9, 2011|access-date=January 22, 2019|archive-date=May 17, 2011|url-status=dead}}

WJMK's ratings plummeted after the switch to Jack FM, and the station saw further ratings erosion when Bonneville International debuted "Rewind 100.3" (a mostly 1980s-based format) on rival WILV in June 2010.Kampert, Patrick. "[https://www.chicagotribune.com/news/ct-xpm-2006-07-19-0607190212-story.html WGN back on top of radio rankings] {{Webarchive|url=https://web.archive.org/web/20190122095711/https://www.chicagotribune.com/news/ct-xpm-2006-07-19-0607190212-story.html |date=2019-01-22 }}", Chicago Tribune. July 19, 2006. Retrieved January 22, 2019.[https://www.rbr.com/chicagos-wjmk-fm-flipping-to-khits/ Chicago's WJMK-FM flipping to KHITS] {{Webarchive|url=https://web.archive.org/web/20190122195542/https://www.rbr.com/chicagos-wjmk-fm-flipping-to-khits/ |date=January 22, 2019 }}", Radio & Television Business Report. March 10, 2011. Retrieved January 22, 2019.

On March 10, 2011, CBS Radio announced the station would return to their previous classic hits format as "104.3 K-Hits", setting the time of relaunch for the following Monday, March 14, at 1:04 pm; at 12:30 that afternoon, after playing "Goodbye to You" by Scandal,"[http://www.chicagoradioandmedia.com/multimedia/audio/1492-wjmk-jack-to-k-hits-031411 WJMK - Jack to K-Hits 03/14/11] {{Webarchive|url=https://web.archive.org/web/20190209124046/http://www.chicagoradioandmedia.com/multimedia/audio/1492-wjmk-jack-to-k-hits-031411 |date=2019-02-09 }}", Chicagoland Radio and Media. March 14, 2011. Retrieved February 9, 2019.Venta, Lance. "[https://radioinsight.com/headlines/netgnomes/32490/k-hits-coming-to-chicago/ K-Hits Coming to Chicago] {{Webarchive|url=https://web.archive.org/web/20181013211730/https://radioinsight.com/headlines/netgnomes/32490/k-hits-coming-to-chicago/ |date=2018-10-13 }}", Radio Insight. June 20, 2011. Retrieved January 22, 2019. the station began stunting with a 34-minute montage of songs and pop culture clips, demarked year by year from 1966 to 1989; at the time promised, "K-Hits" was then launched with "Beginnings" by, fittingly, Chicago."[http://formatchange.com/wjmk-relaunches-as-k-hits-104-3/ WJMK Relaunches As K-Hits 104.3] {{Webarchive|url=https://web.archive.org/web/20160406174423/http://formatchange.com/wjmk-relaunches-as-k-hits-104-3/ |date=2016-04-06 }}", Format Change Archive. Retrieved January 22, 2019.

Chicago radio personalities Ed Volkman and Joe "Bohannon" Colborn (Eddie and JoBo) hosted the station's morning show, along with Gary Spears in middays, Bo Reynolds in afternoon drive time and George McFly heard in the evening.{{cite web|url=http://khitschicago.radio.com:80/shows|archive-url=https://web.archive.org/web/20111025081539/http://khitschicago.radio.com:80/shows|title=K-Hits Shows|publisher=104.3 K-Hits|access-date=January 22, 2019|archive-date=October 25, 2011|url-status=dead}} Weekend hosts included Tommy Edwards, Ken Cocker, and John Calhoun.Feder, Robert "[https://www.timeout.com/chicago/tv/oldies-legend-tommy-edwards-adds-credibility-to-new-k-hits Oldies legend Tommy Edwards ‘adds credibility’ to new K-Hits] {{Webarchive|url=https://web.archive.org/web/20190123171315/https://www.timeout.com/chicago/tv/oldies-legend-tommy-edwards-adds-credibility-to-new-k-hits |date=2019-01-23 }}", Time Out Chicago. March 22, 2011. Retrieved January 22, 2019.

Eddie and JoBo were released on December 6, 2012, with the station citing low ratings as the main factor.Feder, Robert "[https://www.timeout.com/chicago/tv/its-over-and-out-for-eddie-jobo-on-k-hits-morning-show It’s over and out for Eddie & Jobo on K-Hits morning show] {{Webarchive|url=https://web.archive.org/web/20190123171320/https://www.timeout.com/chicago/tv/its-over-and-out-for-eddie-jobo-on-k-hits-morning-show |date=2019-01-23 }}", Time Out Chicago. December 6, 2012. Retrieved January 22, 2019."[http://chicagoradioandmedia.com/news/2971-eddie-a-jobo-released-from-1043-k-hits Eddie & Jobo Released From 104.3 K-Hits] {{Webarchive|url=https://web.archive.org/web/20190123121530/http://chicagoradioandmedia.com/news/2971-eddie-a-jobo-released-from-1043-k-hits |date=2019-01-23 }}", Chicagoland Radio and Media. December 6, 2012. Retrieved January 22, 2019. Mornings were then hosted by Dave Fogel, formerly of WLS-FM.Lazare, Lewis. "[https://www.bizjournals.com/chicago/news/2013/01/07/classic-hits-wjmk-fm-tries-dave-fogel.html Classic hits WJMK-FM tries Dave Fogel in morning drive] {{Webarchive|url=https://web.archive.org/web/20141206214330/http://www.bizjournals.com/chicago/news/2013/01/07/classic-hits-wjmk-fm-tries-dave-fogel.html |date=2014-12-06 }}", Chicago Business Journal. January 7, 2013. Retrieved January 22, 2019. Tommy Edwards retired from radio on September 12, 2014.Feder, Robert "[https://www.robertfeder.com/2014/09/05/tommy-edwards-signing-off-on-a-legendary-career/ Tommy Edwards signing off on a legendary career] {{Webarchive|url=https://web.archive.org/web/20190328065834/https://www.robertfeder.com/2014/09/05/tommy-edwards-signing-off-on-a-legendary-career/ |date=2019-03-28 }}", RobertFeder.com. September 5, 2014. Retrieved January 22, 2019."[https://chicago.cbslocal.com/2014/09/05/chicago-radio-personality-tommy-edwards-set-to-retire-after-five-decades-of-broadcasting/ Chicago Radio Personality Tommy Edwards Set To Retire After Five Decades Of Broadcasting] {{Webarchive|url=https://web.archive.org/web/20190123121523/https://chicago.cbslocal.com/2014/09/05/chicago-radio-personality-tommy-edwards-set-to-retire-after-five-decades-of-broadcasting/ |date=2019-01-23 }}", CBS 2 Chicago. September 5, 2014. Retrieved January 22, 2019. The rest of the station's final airstaff included Brian Peck in middays and Jeffrey T. Mason in afternoon drive.

In its last year, WJMK primarily played music from the 1970s and 1980s.

On February 2, 2017, CBS Radio announced it would merge with Entercom.{{cite web|url=https://radioinsight.com/headlines/116299/cbs-radio-to-merge-with-entercom/|title=CBS Radio to Merge with Entercom|last=Venta|first=Lance|work=Radio Insight|date=February 2, 2017|access-date=November 17, 2017|archive-date=August 26, 2017|archive-url=https://web.archive.org/web/20170826120259/http://radioinsight.com/headlines/116299/cbs-radio-to-merge-with-entercom/|url-status=live}} The merger was approved on November 9, and was consummated on November 17.{{cite web|url=http://entercom.com/press/entercom-receives-fcc-approval-merger-cbs-radio/|title=Entercom Receives FCC Approval for Merger with CBS Radio|work=Entercom|date=November 9, 2017|access-date=November 17, 2017|archive-date=December 1, 2017|archive-url=https://web.archive.org/web/20171201030954/http://entercom.com/press/entercom-receives-fcc-approval-merger-cbs-radio/|url-status=live}}{{cite web|url=https://radioinsight.com/headlines/121072/entercom-completes-cbs-radio-merger/|title=Entercom Completes CBS Radio Merger|last=Venta|first=Lance|work=Radio Insight|date=November 17, 2017|access-date=November 17, 2017|archive-date=November 18, 2017|archive-url=https://web.archive.org/web/20171118222152/https://radioinsight.com/headlines/121072/entercom-completes-cbs-radio-merger/|url-status=live}}

On November 17, at 10{{nbsp}}am, after playing "The Long and Winding Road" by The Beatles and "Changes" by David Bowie, WJMK began stunting with sound effects and clips of a man giving occasional comments, such as "What's going on here?" and "It's almost time to start." One hour later, WJMK flipped to classic hip-hop, branded as "104.3 Jams", which began with an introduction by legendary rapper, actress, radio DJ, and station voice MC Lyte. The first song on "Jams" was "Hypnotize" by The Notorious B.I.G.{{cite web|url=https://radioinsight.com/headlines/121092/104-3-wjmk-chicago-stunting/|title=WJMK Flips to Classic Hip-Hop|last=Venta|first=Lance|work=Radio Insight|date=November 17, 2017|access-date=January 22, 2019|archive-date=June 18, 2018|archive-url=https://web.archive.org/web/20180618002547/https://radioinsight.com/headlines/121092/104-3-wjmk-chicago-stunting/|url-status=live}}{{cite web|url=http://www.robertfeder.com/2017/11/17/entercom-flips-k-hits-hip-hop-104-3-jams/|title=Entercom Flips K-Hits to hip-hop '104.3 Jams'|last=Feder|first=Robert|work=RobertFeder.com|date=November 17, 2017|access-date=January 22, 2019|archive-date=February 4, 2019|archive-url=https://web.archive.org/web/20190204014137/http://www.robertfeder.com/2017/11/17/entercom-flips-k-hits-hip-hop-104-3-jams/?|url-status=live}}{{cite web|url=https://formatchange.com/k-hits-becomes-104-3-jams/|title=Audio of Flip from K-Hits to 104.3 Jams|work=FormatChange.com|date=November 17, 2017|access-date=January 22, 2019|archive-date=May 21, 2019|archive-url=https://web.archive.org/web/20190521153602/https://formatchange.com/k-hits-becomes-104-3-jams/|url-status=live}}

Entercom applied to move the WBMX call sign to 104.3 from its sister station in Boston to match the new format; the change took effect on December 4, 2017.{{cite news|last1=Feder|first1=Robert|author-link1=Robert Feder|title=Robservations: Bruce DuMont retiring from broadcast museum|url=https://www.robertfeder.com/2017/11/29/robservations-bruce-dumont-retiring-broadcast-museum/|access-date=December 5, 2017|work=robertfeder.com|date=November 29, 2017|archive-date=December 4, 2017|archive-url=https://web.archive.org/web/20171204183130/http://www.robertfeder.com/2017/11/29/robservations-bruce-dumont-retiring-broadcast-museum/|url-status=live}} The WBMX call letters had previously been used by new rival WVAZ from 1974 to 1988.[https://cdbs.recnet.com/corres/?doc=80078 History Cards for WVAZ], fcc.gov. Retrieved January 23, 2019.[https://licensing.fcc.gov/cgi-bin/ws.exe/prod/cdbs/pubacc/prod/call_hist.pl?Facility_id=6588&Callsign=WVAZ6588 Call Sign History (WVAZ)] {{Webarchive|url=https://web.archive.org/web/20190123225142/https://licensing.fcc.gov/cgi-bin/ws.exe/prod/cdbs/pubacc/prod/call_hist.pl?Facility_id=6588&Callsign=WVAZ6588 |date=January 23, 2019 }}, fcc.gov. Retrieved January 23, 2019. In addition to WVAZ, WBMX also competes with WPWX and WGCI in the urban radio market.

WBMX is the second station in Chicago to use the "Jams" moniker, the first station being WEJM in the mid-1990s.Heise, Kenan. "[https://www.chicagotribune.com/news/ct-xpm-1996-11-08-9611080312-story.html Isadore Pink, WEJM Rap Deejay Pinkhouse] {{Webarchive|url=https://web.archive.org/web/20190123223545/https://www.chicagotribune.com/news/ct-xpm-1996-11-08-9611080312-story.html |date=2019-01-23 }}", Chicago Tribune. November 8, 1996. Retrieved January 23, 2019.

{{Reflist}}

• {{Official website|https://www.audacy.com/1043jams}}

{{FM station data|28621|WBMX}}

{{Chicago Radio}}

{{Entercom}}

Category:Radio stations established in 1953

Category:1953 establishments in Illinois

BMX

Category:Classic hip-hop radio stations in the United States

Category:Audacy, Inc. radio stations