PLT EXPERIENCED INTERMITTENT XMISSIONS ON UNICOM FREQ. ANOTHER ACFT MANEUVERED TO PROVIDE SEPARATION IN AN UNCTLED ARPT TFC PATTERN.

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FLEW N FROM EOK TO BRL AT 3500 FT; ENTERING A R DOWNWIND AT A 45 DEG FOR RWY 18 AT BRL. CALLED TO UNICOM ABOUT 8 MI S FOR ADVISORY AND HEARD NO REPLY (ALREADY HAD LISTENED TO ASOS: WINDS 210 DEGS AT 12 KTS; ALTIMETER 30.10). CALLED PATTERN ENTRY ABOVE ABOUT 2 OR 3 MI S; THEN 'MIDFIELD R DOWNWIND;' AND 'BASE TO FINAL' TURN (ALL FOR RWY 18). ON BASE; SAW COMMUTER ON ABOUT A 1 MI STRAIGHT-IN FINAL FOR RWY 18; BUT ALREADY BEGINNING TO CLB A BIT AND START A TURN TOWARD THE W. CONTINUED FOR LNDG WHILE THE COMMUTER APPARENTLY DID A R 360 DEG TURN AND THEN LANDED AFTER I HAD CALLED 'CLR OF RWY 18' AND WAS APCHING THE RAMP. LINE GUY CAME OVER AFTER SHUTDOWN AND INDICATED THAT THE COMMUTER HAD BEEN TRYING TO MAKE RADIO CONTACT ON UNICOM BUT HAD NOT HEARD ANY ANSWER. CHKED THE RADIO AND VERIFIED THAT XMIT WAS SET TO #2 COM; THE AUDIO PANEL TO 'AUTO;' AND THE COM ITSELF TO 123.0; THE BRL UNICOM FREQ. LINE GUY SAID HE HAD HEARD ONLY MY FIRST XMISSION BUT NOT ANY SUBSEQUENT ONES. (WHEN; ON DEP; CHKED #2 RADIO; IT WAS OK; BUT #1 WAS RPTED 'MUCH BETTER.' USED #2 FOR ENTIRE TRIP BACK TO MSN AS A TEST; HOWEVER; INCLUDING FLT FOLLOWING FROM MLI; RFD; AND MSN; WITH NO APPARENT OR RPTED DIFFICULTY.) WENT OVER AND TALKED WITH COMMUTER CAPT AND FO; APOLOGIZED FOR THEIR NEED TO GO AROUND (SINCE I WOULD HAVE DEFERRED TO A SCHEDULED CARRIER AS A COURTESY); AND TRIED TO FIGURE OUT WITH THEM WHAT HAD HAPPENED. THEY INDICATED THAT THEY HAD HEARD ALL MY RADIO CALLS (UNLIKE THE LINE GUY) SO THEY KNEW MY LOCATION THROUGHOUT; BUT HAD BEEN UNABLE TO ESTABLISH CONTACT WITH ME. CAPT COMMENTED I HAD 'DONE RIGHT' BECAUSE I 'KEPT BROADCASTING MY POS.' FO SAID THEY ALSO HAD ME ON TCASII 'INTERMITTENTLY.' BOTH SEEMED TO TAKE THE GAR IN STRIDE; THOUGH FO NOTED I SHOULD BE SURE TO CHK THE RADIOS ON DEP.