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| WJMK (FM) | |
|---|---|
| Name | WJMK (FM) |
| City | Plainfield, Illinois |
| Area | Chicago metropolitan area |
| Branding | WJMK 104.3 |
| Frequency | 104.3 MHz |
| Airdate | 1964 (as WCLR) |
| Format | Adult hits / Classic hits |
| Erp | 4,000 watts |
| Haat | 121 meters |
| Facility id | 15377 |
| Owner | Audacy, Inc. |
| Licensee | Audacy License, LLC |
| Sister stations | WBBM, WCFS-FM, WEEW, WFYR, WGCI-FM |
WJMK (FM) is an FM radio station licensed to Plainfield, Illinois, serving the Chicago metropolitan area with a format focused on adult hits and classic hits. The station operates on 104.3 MHz and is part of a cluster of stations owned by Audacy, Inc., a major American broadcasting company. WJMK's programming and technical footprint intersect with Chicago's commercial radio market and its roster of legacy broadcasters, music catalog rights holders, and regional advertisers.
WJMK broadcasts on 104.3 MHz with an effective radiated power and antenna height appropriate for a Class A FM facility in the Chicago market. The station's corporate affiliation places it alongside WBBM (AM), WCBS-FM, WGCI-FM, WLS-FM, and other notable Chicago outlets within national radio ownership groups. WJMK's playlist leans on catalog libraries representing artists associated with Motown Records, Capitol Records, Atlantic Records, Columbia Records, and Warner Records. As a commercial broadcaster, WJMK engages with entities such as the Federal Communications Commission, the Radio Advertising Bureau, and music licensing organizations including ASCAP, BMI, and SESAC.
WJMK traces its roots to an original sign-on in the mid-1960s under a different call sign when suburban FM growth accompanied postwar population shifts in Cook County, DuPage County, and Will County. Over decades the station underwent multiple call sign changes, format pivots, and ownership transactions involving broadcasting companies with histories tied to consolidation trends exemplified by deals among CBS Radio, Entercom, and later Audacy, Inc.. The station's transitions mirrored broader shifts in American radio from beautiful music and automated formats to personality-driven Top 40, adult contemporary, and ultimately classic hits programming popularized during the catalog-oriented 1990s and 2000s. Notable figures in the station's on-air lineage include program directors and morning hosts who previously worked at legacy outlets such as WLS (AM), WMAQ-TV radio alumni, and personalities who migrated between SiriusXM and terrestrial radio.
WJMK's weekday schedule combines music blocks, local traffic and weather reports, and syndicated segments sourced from national syndicators like Premiere Networks and Westwood One. The music library emphasizes recurrent and gold tracks from artists associated with The Beatles, Stevie Wonder, Fleetwood Mac, Madonna, Prince, and Bruce Springsteen, as well as catalog repertoires from The Rolling Stones, Eagles (band), Adele, Michael Jackson, and Prince (musician). Specialty weekend programming has featured countdown shows, themed blocks tied to anniversaries of albums from Motown, deep-dive features referencing the Rock and Roll Hall of Fame, and listener-request hours that interact with social media platforms like Twitter, Facebook, and Instagram. News and traffic inserts are produced in coordination with regional newsrooms and meteorological services including affiliations with AccuWeather and local television partners such as WGN-TV and WFLD for breaking coverage.
Operating as a Class A FM facility, WJMK's technical parameters include an ERP suitable for suburban coverage, an antenna HAAT calibrated to balance service contours with interference protection regulations of the Federal Communications Commission. The station's transmitter site employs broadcast equipment from industry manufacturers, with studio-to-transmitter links, emergency alert system integration, and digital processing chains compatible with HD Radio technology standards promoted by organizations such as iBiquity Digital Corporation. WJMK maintains public inspection files consistent with FCC rules and participates in spectrum coordination with nearby FM allotments in the Chicago radio market and adjacent markets such as Joliet, Illinois and Aurora, Illinois.
WJMK's primary service area covers substantial portions of the Chicago suburbs across Cook County, Will County, and DuPage County, with fringe reception extending into portions of Kane County and Lake County. Urban-center reception in downtown Chicago can vary due to co-channel and adjacent-channel signals from other metropolitan frequency users and the dense radio environment that includes high-rise multipath. Audience measurement and ratings for the station are tracked by firms such as Nielsen Audio, informing sales efforts with agencies and advertisers including regional branches of Clear Channel Outdoor, local shopping centers, and automotive dealers.
WJMK is owned by Audacy, Inc., a publicly traded broadcasting company with a portfolio that includes major-market stations and digital platforms. Management structure aligns with corporate divisions handling programming, sales, engineering, and legal compliance, and interacts with national advertising clients, record label promotion departments, and performance rights organizations. Past ownership entities have included legacy broadcasters whose mergers and acquisitions exemplify regulatory and commercial dynamics involving the Telecommunications Act of 1996 and subsequent media consolidation activity. Station leadership has often included executives with backgrounds at national companies such as CBS Corporation and Viacom.
WJMK has participated in regional promotion events, charitable radiothons, and concert sponsorships alongside partners like municipal governments in Plainfield, Illinois, nonprofit organizations, and venues such as the United Center and Ravinia Festival. The station has hosted remote broadcasts at fairs, supported disaster relief campaigns coordinated with organizations like the American Red Cross, and engaged in voter-registration drives and public-service outreach concurrent with initiatives by Illinois Secretary of State offices and county election boards. Special broadcasts have marked milestones for legacy artists inducted into the Rock and Roll Hall of Fame and local anniversaries tied to suburban cultural institutions.
Category:Radio stations in Illinois