The station, known as "10AK" began broadcasting in 1928 as an amateur station at 250 metres. In 1933, the station changed to 1200 kHz, moved to 1210 kHz in 1936 and then moved to its present frequency at 1240 kHz on March 29, 1941. 10AK switched to its present callsign CJCS in 1935.
CJCS was owned by Raedio Inc. and opened up a new FM sister station CHGK-FM on September 2, 2003.
In September 2010, Raedio Inc. announced a tentative deal, pending CRTC approval, to sell the station to Haliburton Broadcasting Group which received CRTC approval on February 21, 2011.
On April 23, 2012 Vista Broadcast Group, which owns a number of radio stations in western Canada, announced a deal to acquire Haliburton Broadcasting, in cooperation with Westerkirk Capital. The transaction was approved by the CRTC on October 19, 2012.