I haven't DX'd the longwave beacons for over 20 years.  I used (and still have) a BC-453B that I restored for that purpose.  Using no processing aids and my inverted L ham antenna I logged almost 100 from CA over a couple of winters.  It was fun.

But I will never forget one night while tuning around looking for new ones, I heard Frank Sinatra on 279KHz.  I cursed because that was obviously a mixing product of AM stations being produced in the receiver or some rectifying junction on my property.  Then I noticed it had a very slow fade of minutes duration with a peak that was surprising in strength.  When the song ended, a male announcer came on in Russian, made some commentary, and then introduced the next Sinatra selection while giving the song title in English, heavily accented.  Whoa!  It took some investigation and more listening the next night to determine it was Radio Rossii's transmitter on the edge of the Sea of Okhotsk in Siberia.  700' antenna with something like 1MW.  Radio Rossii shut down all but its FM service in 2014, but since the Ukranian invasion it has reactivated selected sites.

Dennis AE6C