TFC WATCH ACFT TURNS BACK TOWARD CLASS B AIRSPACE AND ENTERS WITHOUT CLRNC. CREATES AN NMAC.

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IT WOULD BE BEST TO DESCRIBE WHAT HAPPENED BY RECOUNTING THE XMISSIONS BTWN MYSELF AND NEWARK TWR. IT ALSO MUST BE UNDERSTOOD THAT MY JOB ENTAILS LISTENING TO XX BROADCASTING IN MY L EAR AND ATC FACILITIES IN MY R. AT THE TIME OF THE INCIDENT I WAS MAKING A RECORDING FOR BROADCAST ON A LCL RADIO STATION. HEREAFTER EWR WILL REFER TO NEWARK TWR AND ABC WILL REFER TO MY ACFT. EWR: ABC; LEAVING THE CLASS B AIRSPACE; SQUAWK VFR; FREQ CHANGE APPROVED. ABC: 'ROGER NEWARK. THANK YOU AND HAVE A GOOD DAY.' AT THIS TIME I WAS COMPLETING THE RECORDING AND CHANGING MY XPONDER CODE TO VFR. AFTER ABOUT 30 SECONDS I REALIZED I HAD NEGLECTED TO RPT ON SOME TFC ON THE GARDEN STATE PARKWAY TO THE BROADCASTING GND STATION. AT THAT POINT I PROCEEDED TO TURN BACK EBOUND TO GET A BETTER VIEW TO MAKE MY RPT. BEING JUST CLRED FROM THE AIRSPACE I TRIED TO REMAIN OUTSIDE AT WHICH TIME I HEARD THIS: EWR: 'CESSNA ABC IT LOOKS LIKE YOU'VE GOT SOMEONE IN YOUR FACE THERE. IT SEEMS ABC HAS REENTERED THE CLASS B. ABC; WHAT ARE YOU DOING? I THOUGHT YOU WERE HDG W.' ABC: 'YES SIR I KNOW BUT I NEEDED TO VIEW THE PARKWAY ONE MORE TIME TO MAKE A RPT BUT I GUESS THE CESSNA'S GOT IT. SORRY ABOUT THAT. HDG W NOW FOR ABC.' EWR: 'OK THEN.' CESSNA ABD WAS ANOTHER TFC RPTING PLANE WHICH I CAME WITHIN ABOUT 500 FT OF AT THIS TIME. UPON SEEING THE TFC AND HEARING EWR I IMMEDIATELY BANKED TO THE L AND HEADED W. I BELIEVED I WAS REMAINING JUST OUTSIDE EWR'S CLASS B. HAVING BEEN JUST CLRED. I ASSUMED EWR STILL HAD ME ON RADAR AND COULD SEE I WAS JUST OUTSIDE. I GUESS NOT.