It broadcasts on 1040 kHz with a daytime power of 10,000 watts and a nighttime power of 5,000 watts as a class B station, using a directional antenna with the same directional pattern day and night to protect WHO in Des Moines, Iowa.
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The call sign CJMS was chosen as the original plan was to use the 1280 kHz frequency, which was allocated instead by the Canadian Radio-television and Telecommunications Commission (CRTC) to multilingual station CFMB.