WCHY Mix 105.1 Madison WI 9-2012.png
Broadcast areaMadison metropolitan area
Frequency105.1 MHz
BrandingMix 105.1
FormatHot adult contemporary
First air date
April 20, 1992 (1992-04-20) (as WYZM)
Former call signs
WIMN (1991–92)
WYZM (1992–2000)
WBZU (2000–05)
WCHY (2005–12)
Call sign meaning
WMHX = "Mix"
Technical information
Licensing authority
Facility ID73655
ERP6,000 watts
HAAT74 meters (243 ft)
Transmitter coordinates
43°13′19″N 89°18′00″W / 43.222°N 89.300°W / 43.222; -89.300
Public license information
WebcastListen live (via Audacy)

WMHX (105.1 FM "Mix 105.1") is a commercial radio station licensed to Waunakee, Wisconsin and serving the Madison metropolitan area. The station is owned by Audacy, Inc. and broadcasts a hot adult contemporary radio format. From mid November to December 25, 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". The station was the first country FM competitor to WWQM-FM.[2]

It became WBZU ("105-1 The Buzz") in November 2000, launching a 1980s music format with a 5,000-song marathon without interruption.[3] 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.

On May 5, 2005,[4] 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 (8–11 a.m.) as well as "No-Repeat Work Weeks", in which no song was repeated for the entire 9 a.m.–5 p.m. 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. (The WBZU call letters would be parked at 910 AM in Scranton, Pennsylvania.[5])

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.[6]


  1. ^ Broadcasting & Cable Yearbook 1994 page B-418
  2. ^ Kovalic, John (May 8, 1992). "There's a new kid on the radio block". Wisconsin State Journal. p. Rhythm 21. Retrieved February 24, 2020.
  3. ^ http://www.americanradiohistory.com/Archive-RandR/2000s/2000/RR-2000-11-24.pdf[bare URL PDF]
  4. ^ Alesia, Tom (May 6, 2005). "'Buzz' stops buzzing; now, 'Charlie' runs show". Wisconsin State Journal. p. C6. Retrieved February 24, 2020.
  5. ^ Ondrako, Mary (June 4, 2005). "Jack airs his eclectic tastes on growing range of stations". Times-Tribune. p. B3. Retrieved February 24, 2020.
  6. ^ "Mix 105.1 Debuts," from RadioInsight, originally reported 8/15/2012 and updated 9/4/2012