As nothing has changed, copied and pasted from the previous 530 thread (from April 2023):
520 F9, an aeronautical beacon in Mirimichi, New Brunswick, has made it here several times over the years. It's 125 watts, sending out NB in Morse Code. I first heard it soon after getting an Akai AT-VO4, renowned for its FM section but with a great AM side as well (including an external and thus steerable ferrite rod antenna), starting at 520 and going to 1620. I used it mostly for FM DX, but F9 came in clear as a bell the first time I heard it.
530 Radio Enciclopedia (CMBQ in some listings), Villa Maria, Cuba, with 10 kW when I first heard it in 2018. About a week later, in popped CIAO Brampton, Ont. (now CHLO) with its mix of foreign language programs, punching above its 250-watt weight courtesy the magic of low frequencies and little competition.
I wonder in retrospect if I caught Turks and Caicos or Radio Rebelde over the years, or even TICAL on 525. There was a lot of Spanish I couldn't ID prior to SDRs for direction finding and hearing more clearly what I received with interference.
and from the previous 540 thread (from April-May 2023):
In the beginning, there was WYLO, Jackson, Wis., with 250 watts. It's a booming 400 as WAUK now.
That's just enough more power to inflict harm on the 50 kW of CBK Watrous, Sask., at night. Once reliable, now one must set the antenna just so to knock WAUK down, and it isn't always a success.
Others heard on 640: KNOE Monroe, La.; XEWA San Luis Potosi, Mex. (in its 150 kW glory days) and most recently, WBWD Islip, N.Y. on 9/1/2021, with Spanish music instead of reports on Figure-8 demolition derbies.