CIDR FM 93.9 Windsor, ON


Slogan/Positioner: 93.9 The River

Format: Adult Album Alternative

Web site:

E-mail: visit web site

Power/Height/Class: 100,000 watts / 618 feet / C1, directional

FCC technical information (note: Canadian station data not regularly updated):

More about station:

Call Sign History:

  • CIDR: 1993
  • CKLW-FM: 1991
  • CKMR: 1988
  • CKLW-FM: 1986
  • CKEZ: 1985
  • CFXX: 6/1984
  • CKJY: 1/1982
  • CKLW-FM: 1948

Call Sign Origin: Detroit River

On Air Date: 1948

Owner: Bell Media

Telephone: (248) 646-8484



  • 2007: CTVglobemedia purchases CHUM Radio group.
  • 9/1/2006: Hot AC format, '93.9 FM; Today's Best Music' is dropped and station begins stunting toward format change to Adult Album Alternative to be fully implemented on September 4th. Stunt includes snippets of 7,000 rock-based songs as station returns to using the name '93.9 The River'.
  • Summer 2005: Format shifts to hot adult contemporary as "Today's Best Music".
  • 8/25/2000: Format change to adult contemporary as 'Lite Rock 93-9 FM'.
  • 10/1998: Station now referring to itself as 'Smooth Rock 93.9 The River' - not much difference in playlist, but more mainstream Classic Rock is more common.
  • 1994: Format change to adult alternative as 'The River'.
  • 1993: Call sign change to CIDR as 'I-94', classic rock format.
  • 1993: CKLW-AM and FM acquired by CHUM Ltd.
  • 1991: Back to CKLW-FM once again as '93.9 The Legend' in another attempt to recapture the glory days of CKLW AM.
  • 1988: Call sign change to CKMR as 'More 94' with a pop/middle-of-the-road format as 'The Motor City's Adult Music Station'.
  • 1986: Call sign changed back to CKLW-FM and easy listening is changed to oldies in an attempt to recapture the magic of 'The Big 8' of the late 1960s and early 70s. The format included many of the legacy sounds of CKLW, including 20/20 news and jingles.
  • 1985: Baton Broadcasting sells AM & FM to CUC Broadcasting. The Big Band format was moved to AM 800 while FM 93.9 became CKEZ with an easy listening format.
  • 1984: Top 40 CFXX 'The Fox' programmed from 5pm - 7pm during weekday evenings and two hours in morning drive. The Canadian Radio-television and Telecommunications Commission, however, refused to approve more than four hours of pop music programming a day and the attempt to change the station's format was abandoned before it ever was ever fully implemented. The Fox was meant to take over the top 40 sound of CKLW AM 800 which was struggling in the ratings due to popularity of the FM band.
  • 1/1982: Format is changed to big band as CKJY.
  • 1974: Format is full service/country, marketed towards Windsor.
  • 1970: Both FM and AM stations sold to Canadian-based Baton Broadcasting due to the Canadian Radio-television and Telecommunications Commission's new rules limiting foreign ownership of Canadian media.
  • 1967: Separate programming block now from 6pm - Midnight daily.
  • 10/1/1963: Adds separate programming from AM 800 from 7pm - 9pm daily.
  • 1963: Power increase to 50,000 watts, RKO takes over complete ownership of CKLW-AM/FM.
  • 1956: Along with AM 800, acquired in 1956 by a consortium that included the American company RKO.
  • 1950: Drops CBC programming and became Detroit affiliate of Mutual Broadcasting System despite being a Canadian radio station.
  • 1948: On the air as CKLW-FM duplicating AM 800 at 250 watts, owned by Western Ontario Broadcasting. Programming was from CBC Dominion Network.



Approximate coverage area:



Transmitter location:

Essex County, ON


Old logo gallery:












Southeast MI | Flint/Tri-Cities | Mid-Michigan | West Michigan

Northern MI | Upper Peninsula | Ontario | Television

TV Markets | FM Radio | LPFM | FM Translators

AM Radio | Sports | Owners | Weather Radio

LPTV | AM TIS | Format Key


Home Page | Contact | Station Listings | History | Links

Search | About | Shop | Sitemap | Weather


Twitter Facebook E-mail Feed