A C182 PERFORMS A RWY INCURSION AFTER CLRING THE ACTIVE RWY AND BEING ADVISED TO 'MONITOR GND.' HE PROCEEDS TO TAXI WITH STATIC IN HIS EARPHONES AND PARKS AT THE RAMP IN PRC; AZ.

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FLYING INTO PRESCOTT; I WAS ABLE TO CONTACT TWR DUE TO 1 CTLR HANDLING 2 RWYS (RWY 21L&R); AND APPROX 20 ACFT LNDG AND TAKING OFF. I FINALLY MADE CONTACT AFTER SEVERAL 360 DEG TURNS 7 MI OUT. I WAS FINALLY CLRED TO LAND. I WAS ASKED TO GO AROUND ON SHORT FINAL -- TWICE. UPON FINALLY LNDG; TWR TOLD ME TO TAXI TO THE END OF RWY 21; TURN L OR R AND MONITOR GND. I DID SO; EVEN THOUGH NOT CONTACTING GND IS VERY UNUSUAL. IN ORDER TO GET TO TRANSIT PARKING I HAD TO CROSS RWY 30. THERE WAS A HELI LEAVING; OVERFLYING RWY 30 AND HAD PASSED THE INTXN. THE FREQ FOR GND WAS ONLY GIVING ME STATIC LIKE 2 PEOPLE TALKING AT ONCE. APPARENTLY; BOTH TWR FREQ AND GND WERE TRYING TO CONTACT ME TO NOT CROSS THE RWY. I DID NOT HEAR TWR AS I WAS ON GND AND I DID NOT HEAR ANYTHING THAT I COULD UNDERSTAND UNTIL I REACHED TRANSIT PARKING. I CALLED TWR BY PHONE AND GOT THE USUAL CHEWING; FOR XING THE RWY. HINDSIGHT BEING 20/20; I SHOULD HAVE IGNORED TWR AND CONTACTED GND ANYWAY. I ASSUMED THEY WERE SO BUSY THEY DIDN'T HAVE TIME FOR TAXI INSTRUCTIONS. THE INCIDENT DID NOT CREATE ANY KIND OF NEAR MISS; ETC; BUT WAS STILL A RWY INCURSION.