The Buzzer (4625 KHz) is doing interesting things currently:

You can tune in here:
websdr.ewi.utwente.nl:8901/

You can read more about it here:
en.wikipedia.org/wiki/UVB-76

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@fribbledom It's apparent that the Buzzer tone's are to indicate when that station is *not* sending any messages. So anything being sent while the tones are occurring is outside interference. When they want to send a message in the past, they've turned the tones off during the message, then back on. Clever way of doing it since only they can turn the tones on and off.

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