7O6T worked 80m

Good signal on 3504  579 peaking  but huge pile up.
I called several times direct on their QSX but not heard.
After long persistent calling to my surprise I received the 599.
Lots of QRM on 80m of course but the band was empty anyway
 guess no one could have a problem with that.
 Later 7O6T  very strong on 30m hard to believe it was real.
But no QSO