|City of license||Oshawa, Ontario|
|Branding||107.7 FM & 1580 AM CKDO|
|Slogan||Durham's Classic Hits|
|Frequency||1580 kHz (AM), 107.7 MHz (FM)|
|First air date||October 5, 1946|
|Power||10 kW(AM), 2 kW(FM)|
|Owner||Durham Radio Inc.|
|Website||107.7 FM & 1580 AM CKDO|
CKDO is a Canadian Class A clear-channel (Canada only) radio station, broadcasting at 1580 AM in Oshawa, Ontario. The station airs an oldies format. CKDO also has an FM rebroadcaster (CKDO-FM-1) at 107.7 FM. There are 51 stations on 1580 AM in the United States; 1580 AM is a regional channel in the U.S. The only other Canadian station on 1580 AM is CBPK, a 50 watt weather information station.
CKDO was launched in 1946 by T. W. Elliott, an executive with the Canadian division of General Motors. Its original frequency was 1240.
In 1950, Elliott sold the station to Lakeland Broadcasting, who adopted the new callsign CKLB. The station moved to AM 1350 in 1956. The following year, Lakeland launched an FM sister station, CKLB-FM. In 1979, the stations were acquired by Grant Broadcasting, and CKLB adopted the new call sign CKAR.
In 1990, Grant Broadcasting sold the stations to Power Broadcasting. In 1992, Power readopted the station's original CKDO calls and its current format. In 1996, the station moved to an adult contemporary format, sometimes simulcasting the programming of its FM sister station and other times airing its own distinct programming schedule.
In 2000, Corus Entertainment acquired the stations. In February 2001, Corus converted CKDO to its short-lived talk radio network (also consisting of CHML in Hamilton, CFPL in London, CKRU in Peterborough, CFFX in Kingston and CJOY in Guelph), but the station returned to the oldies format by the summer of that year.
In 2003, CKDO and CKGE were acquired by their current owner, Durham Radio.
Durham established the FM rebroadcaster in 2005. The station had originally been approved by the CRTC in 2004, conditional on choosing a different frequency than 107.7, for which the station had originally applied.
- 107.7 FM & 1580 AM CKDO
- CKDO history at Canadian Communications Foundation
- Radio-Locator information on CKDO
- Query the REC's Canadian station database for CKDO
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