The last remaining medium wave in North Macedonia [810 kHz] has failed at least since August 14, 2021. According to gossip from the region, the cause in this case is external.
Accordingly, the transformer station of the broadcasting station Ovce Pole was damaged by bush fires. The repair or replacement of the destroyed system parts is solely in the hands of EVN Makedonija, the responsible network operator.
This would mean that the medium wave would be as good as empty during the day in Thessaloniki as well. The stations on 972 and 1368 kHz, which can still be heard quite well there, are two of the medium wave pirates who are practically permanently active in Greece and ignored by the authorities.
[Google translated from German)
Information from Georgi Bancov in Radio Eins Radio-News (2021-09-08)