The station originally broadcast on 1240 kHz, and was operated by Telegram Printing & Publishing, the owner of the local weekly Sherbrooke Telegram-Observer.
CKTS-AM 900 had its antenna farm located close to 1643 Dion Road in St-Elie d'Orford (which has since become part of Sherbrooke).
Most of the advertising on the station was in French and most listeners were francophones, much to the displeasure of the Canadian Radio-television and Telecommunications Commission.
Despite the fact that Corus had its own English news/talk radio station in Montreal, CINW, CKTS continued to air programming from CJAD.
Due to high ongoing maintenance costs, the station was shut down on November 19, 2006,[2] and its licence was voluntarily revoked as of December 13.