Radio Krakow PL 90.0 MHz

Last week I received a very enthusiastic mail from Jerzy Pawelczyk ( Fonoteka Radia Kraków) confirming my reception of Radio Krakow last summer. Jerzy writes:
We told the listeners about that curious phenomenon in one of our broadcasts. I will try to find it among archive server recordings. As soon as I succeed I will send you this recording.