C182 COMMERCIAL PLT DEPARTS APA WITHOUT CLRNC.

Narrative

WHILE GETTING READY TO DEPART APA ARPT FOR PIR; SD; VFR; FIRST I NEGLECTED TO HAVE AN ARPT DIAGRAM FOR TAXI PURPOSES. WHEN GND SAID HOLD SHORT OF RWY 10 AND MONITOR GND; SOMETHING DISTR ME AND I TOLD GND I WAS READY; THEN I THOUGHT I HEARD CLRED FOR TKOF. WITHOUT EVEN THINKING; I ENTERED THE RWY 10 AND TOOK OFF. ONLY AFTER AIRBORNE; WHEN GND TOLD ME THAT I HAD NOT BEEN CLRED FOR TKOF AND THEN SEEING THE RADIOS SET ON 122.7 GND; I REALIZED I WAS IN ERROR. I PANICKED THEN THE CTLR SAID CONTACT DENVER ON 132.75. WHEN I CONTACTED THEM; THE CTLR WAS BUSY; SO I SET THE XPONDER TO 1200 AND GOT OUT OF THERE AS FAST AS I COULD. I KNOW IT WAS TOTALLY ALL MY FAULT. CONTRIBUTING FACTORS WERE MY MIND PROBABLY WAS MORE ON THE PARALYZED PATIENT THAT I BROUGHT OUT THERE INSTEAD OF FLYING THE AIRPLANE. IN ADDITION; MY RADIO VOLUME BECAME VERY LOW (WHICH I WILL GET FIXED). GND CTL STATED THAT SOUTH DAKOTA WAS N; NOT S; AND I KNEW THE WX WAS VFR TO THE S AND THEN I CLBED TO 7500 FT; STAYED BELOW CLASS B AIRSPACE. I ALSO NEED TO SPEND MORE PRACTICE TIME AT TWR CTLED ARPTS AND IN AND AROUND CLASS B AND C AIRSPACE AND GET THE RADIOS SO THE VOLUME IS HIGHER.