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I have vague memories from the early 1990:s of some sort of service that broadcast something related to sunspot numbers, in CW, probably shortwave. I think the world "BOULDER" was in there somewhere. Whatever it was, I could hear it in southern Sweden. What was it? Is is still there? On what frequency?

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  • $\begingroup$ Do you have DK0WCY in mind? $\endgroup$
    – henryflower
    Commented Nov 3, 2020 at 8:59
  • $\begingroup$ Well, my memory is so foggy it's hard to say with any certainty, but the callsign feels familiar, and the telegram sample looks familiar, so that's very probably it. Write it up as an answer and I'll accept it! $\endgroup$
    – Ture Pålsson
    Commented Nov 3, 2020 at 9:07
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    $\begingroup$ That could be WWV. See en.wikipedia.org/wiki/WWV_(radio_station) that is not CW but voice. $\endgroup$
    – Jean-Marie
    Commented Nov 3, 2020 at 12:09
  • $\begingroup$ Hello Ture, and welcome to ham.SE! $\endgroup$
    – rclocher3
    Commented Nov 3, 2020 at 15:04

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The beacon DK0WCY transmits such information on 80 and 30m.

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