Kalundborg 243 kHz. Today at 0400 UTC the transmitter was still on reduced power, but at 0800 back on full power, it seems. (re: https://mediumwave.info/2022/08/28/denmark-40/)
The transmitter in Kalundborg was inaugurated on August 29th, 1927 and is still on air four times a day.
Ydun Ritz (2022-08-29)