The station was founded in 1974 as multilingual radio station catering to various groups within the city.
In the '80's it also boasted, for a very short time, a cutting edge alternative music program (well before such programs existed on AM radio in particular) called Nightbeat. This program was responsible for promoting local talent and giving airplay to music that wasn't being played on mainstream radio.
In May 2011, Newcap Radio announced that it was selling CKJS and CHNK-FM to Evanov Communications, pending CRTC approval. On October 24, 2011, the CRTC approved Duffern Communications (aka: Evanov Communications) to acquire CKJS and its sister station CHNK-FM.