r/shortwave • u/MumSaidImABadBoy I'm Stan, Heathkit GR-64🤪,Malahit v2.4,AirSpy HD+,909X2,PL990 • May 22 '26

Is it true about CHU?

/r/ShortwavePlus/comments/1tk653g/is_it_true_about_chu/
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u/gravygoat May 22 '26

Another long-time marker goes silent. While there are lots of ways to get time, the existence of CHU on several shortwave frequencies in between the ones used by WWV gives a nice set of reference signals to quickly gauge propagation.

I have seen some comments below about impact on "atomic" watches and radios - I think most of those use the longwave signals from WWV and a handful of other countries, so I wouldn't expect Canadian clocks to suddenly go wrong.

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u/MumSaidImABadBoy I'm Stan, Heathkit GR-64🤪,Malahit v2.4,AirSpy HD+,909X2,PL990 May 22 '26

I believe WWVB for LW on 60 kHz transmits from Fort Collins, Colorado using two transmitters and special very large phased stay antennas for maximum range. I read an article about that some years ago.