CKSO is the former call sign of two radio stations and a television station in Greater Sudbury, Ontario, Canada, as well as the current call sign of a radio station in the city which has no affiliation with any of the older stations.
The current CKSO is a Christian music station, which broadcasts at 101.1 on the FM dial.
The CKSO call letters were chosen because of their historic significance in the Sudbury area. The following stations in Sudbury previously used the CKSO call letters:
CICI was CKSO-TV, Canada's first privately owned television station, from 1953 to 1971.
Each of those stations' histories with the call letters is discussed in more depth on their pages. After 1990, the CKSO call letters did not exist in the Sudbury market until the current CKSO debuted in 2003.
A road in the southernmost portion of Sudbury is named CKSO Road, because the original CKSO's transmitters were located there.
When the original owner, W.E. Mason died in 1948, the executors of his estate took over operation of CKSO and in 1949 (some uncertainty over the date, also listed as 1951), CKSO Radio Ltd. whose owners were George M. Miller, J.M. Cooper, W.B. Plaunt Sr., and W.J. Woodill, purchased CKSO from the Mason estate.
CKSO TV ► It was back in 1953, when CKSO TV signed on the air becoming Canada's first privately owned commercial television station.
CKSO and sister station CIGM were owned by Cambrian Broadcasting, who sold them to United Broadcasting in 1979.
While CKSO had struggled in the radio ratings against CHNO, CJRQ quickly became the most-listened to radio station in Northern Ontario, and has retained that status ever since.
After the 1990 swap, the CKSO call sign no longer existed in the Sudbury area until a Christian music station signed on in 2003.