SDR recording catch.
Strong AM signal at 0405-0408 with an unshazamable song.
Back on at 0417-0419 with "I Am A Man Of Constant Sorrow"
Then on at 0419 with USB with Led Zeppelin. This was much weaker, and could have been a different station.
Off at 0423
Back on at 0427 MotorHead "Ace of Spades"
Off at 0428