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WCHY "Mix 105.1"
CityWaunakee, Wisconsin
Broadcast areaMadison metropolitan area
BrandingMix 105.1
SloganToday’s Hits
Frequency105.1 MHz
First air dateApril 20, 1992 (as WYZM)
FormatHot Adult Contemporary
Christmas music (Nov.-Dec.)
ERP6,000 watts
HAAT74 meters (243 f)
Facility ID73655
Callsign meaningWMHX = "Mix"
Former callsignsWIMN (1991-1992)
WYZM (1992-2000)
WBZU (2000-2005)
WCHY (2005-2012)
OwnerEntercom Communications
(Entercom License, LLC.)
Sister stationsWMMM-FM, WOLX-FM
WebcastListen Live

WMHX (105.1 MHz "Mix 105.1") is a commercial FM radio station licensed to Waunakee, Wisconsin and serving the Madison metropolitan area. The station is owned by Entercom Communications and broadcasts a hot adult contemporary radio format. From mid November to December 25th, it switches to all Christmas music.


On April 20, 1992, the station first signed on as WYZM, owned by Janice and Ronald Felder.[1] The station was known throughout most of the 1990s as country music station "The Big Y-105."

It became WBZU ("105-1 The Buzz") in November 2000, launching a 1980s music format with a 5,000-song marathon without interruption.[2] Over time, the station started to sprinkle hits from the 70s and 90s into its format, with an eventual emphasis on classic hits from all three decades.

In May 2005, the station became WCHY and rebranded as "105.1 Charlie FM" ("We Play Everything"), adopting an adult hits format very similar to the Jack FM-branded stations, with a wide-ranging list of popular music from the 70s, 80s, and 90s, along with occasional music from the 1960s and 2000s. In later years, "Charlie FM" would feature commercial-free weekday morning music blocks (8-11AM) as well as "No-Repeat Work Weeks", in which no song was repeated for the entire 9AM-5PM Monday-thru-Friday work week. Aside from airing the syndicated Kidd Kraddick in the Morning show between March 2009 and May 2010, "Charlie FM" used no regular roster of live disc jockeys, with prerecorded voiceovers serving as the continuity element.

On September 4, 2012, at 2 p.m., after playing a half-hour of "goodbye"-themed songs (ending with *Nsync's "Bye Bye Bye" and R.E.M.'s "It's The End of the World As We Know It (And I Feel Fine)"), WCHY flipped to a hot adult contemporary format as "Mix 105.1", launching with Carly Rae Jepsen's "Call Me Maybe". (The station would change its call sign to WMHX on September 20, 2012.) In announcing the change, Entercom-Madison VP/Market Manager Michael Keck stated that "There is a hole in the [Madison] market for a station like Mix;" indeed, Madison had lacked a Hot AC-formatted station since WXXM ("Mix 92.1") dropped the format for progressive talk in 2004. "Mix 105.1" aimed to position itself musically between popular competitors WZEE (Top 40) and WMGN (AC) with a playlist emphasizing current musicians including Adele, Pink, Rihanna, and Maroon 5.[3]




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Coordinates: 43°13′19″N 89°18′00″W / 43.222°N 89.300°W / 43.222; -89.300