BELL 206 DRIFTED INTO TFR. CONTACT WITH APCH CONTROL HAD BEEN ATTEMPTED; BUT THE PLT LATER REALIZED THAT THE RADIO WAS INOP.

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THE MISSION WAS TO RELOCATE A NEWLY REFURBISHED EMS ACFT TO OUR COMPANY MAINT FACILITY TO HAVE RADIOS AND GPS'S PROGRAMMED WITH UPDATED FREQS AND DATA. THE 2 GPS'S ON BOARD WERE A GARMIN 430 AND A GARMIN 396. ALL FLT PLANS AND FLT FOLLOWING WERE TO BE CONDUCTED THROUGH THE COMPANY COMS CTR. I DEPARTED AT XA34 WITH THE FIRST FUEL STOP AT ZZZ1. THE SECOND LEG WAS TO ZZZ2. I DEPARTED ZZZ2 AT XF31 WITH A DEST OF ZZZ3. THIS STRAIGHT LINE LEG WOULD HAVE TAKEN ME THROUGH THE SE CORNER OF A TFR. APPROX 10 MINS AFTER DEPARTING; I ATTEMPTED TO CONTACT ZZZ APCH ON MY COM #2 RADIO NUMEROUS TIMES. BOTH GPS'S WERE NOT SHOWING TFR AND I WANTED TO GET CLRNC THROUGH THE EXTREME SE CORNER OF THE TFR. WHEN IT WAS APPARENT THAT I HAD NO COM WITH ZZZ APCH; I STARTED DRIFTING MORE S TO AVOID THE TFR WHILE NAVING OFF THE VFR SECTIONAL AND CONTINUING TO TRY TO CONTACT APCH. WHILE SWITCHING RADIO FREQS; RADIOS AND NAVING OFF THE VFR SECTIONAL; I RECOGNIZED THE INTERSTATE OFF MY NOSE AND KNEW I HAD ACCIDENTALLY PENETRATED THE TFR WHILE IN THIS HVY PLT WORKLOAD. I IMMEDIATELY STARTED A L TURN TO THE SE; WITH AN APPROX HDG OF 150 DEGS TO EXIT THE TFR WHILE STILL TRYING TO CONTACT ZZZ OR ZZZ4 APCH. ONCE OUTSIDE AND S OF THE TFR; I WAS ABLE TO CONTACT ZZZ4 APCH THROUGH COM #1 RADIO. THIS IS ALSO WHEN I REALIZED THAT MY COM #2 RADIO WAS NO LONGER OPERATIONAL. ZZZ4 ACCEPTED MY FLT FOLLOWING TO MY DEST OF ZZZ3 AND ADVISED ME TO CONTACT ZZZ APCH; ON THE GIVEN PHONE NUMBER; UPON MY ARR. I CONTACTED ZZZ AND GAVE THEM THE REQUESTED INFO. THEY ALSO SAID THEY TRIED TO CONTACT ME ON THE GUARD FREQ. I THEN DEPARTED ZZZ3 FOR THE COMPANY MAINT FACILITY AT XH17 AND ARRIVED AT XI05 TO FIND THAT MY COM #2 RADIO WAS NOT OPERATIONAL DUE TO THE ANTENNA COAXIAL CABLE BEING CUT BY CHAFING THE TAIL ROTOR DRIVE SHAFT. THE DRIVE SHAFT WAS CONDEMNED AND REPLACED AND THE RADIO COAXIAL CABLE WAS ALSO REPLACED. IT WAS AT THIS TIME THAT I LEARNED THAT THE GPS'S HAD NOT BEEN UPDATED SINCE OCT/07 AND THAT THE COM RADIOS HAD NO GUARD CAPABILITY. I BELIEVE THAT THE RADIO MALFUNCTION; GPS'S NOT SHOWING THE TFR; PLT WORKLOAD; AND NO VHF GUARD CAPABILITY WERE ALL CONTRIBUTING FACTORS IN MY ACCIDENTAL PENETRATION OF THE TFR.