On Ydun’s Medium Wave Info I read about the unidentified signals on 243 kHz reported on August 23 at 1500 UTC ( https://mediumwave.info/2023/08/30/denmark-61/ ).
I happen to have a recording of that frequency range around that time made in the Netherlands at the University of Twente WebSDR (of which I’m the developer and maintainer).
However, on that recording I don’t see any suspicious transmissions around that time. At 15:30:44 DR’s carrier came up, and at 15:40:14 the interval music started.
So… it seems the unidentified signal must have been quite weak, and/or quite local to the location where it was heard.
Have their been any reports from other listeners and/or other times?
Regards, Pieter-Tjerk de Boer, PA3FWM (2023-09-17)