The National Research Council (NRC) of Canada announced that the station's transmissions will cease. The NRC's official shortwave time signal is scheduled to permanently stop broadcasting on June 22, 2026.
National Research Council Canada station CHU was one of the world’s best-known shortwave time signal stations. Operating continuously from near Ottawa, Ontario, CHU transmitted official Canadian time signals on three frequencies: 3330 kHz, 7850 kHz and 14670 kHz. The station broadcast 24 hours a day using atomic-clock-derived timing signals. Listeners would hear precise one-second ticks, minute markers, bilingual voice announcements, and digital time codes. Unlike ordinary broadcast stations, CHU served a technical purpose. Engineers, researchers, surveyors, broadcasters, radio operators, and hobbyists used it to synchronize clocks and calibrate equipment with remarkable precision.
More info at: https://nrc.canada.ca/en/chu-short-wave-station/
Good article: https://swling.com/blog/2026/05/canadas-chu-will-go-silent-on-shortwave-on-june-22-2026/
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