ARTCC RADAR CTLR WAS HAVING RADIO PROBS AND LANGUAGE BARRIER PROBS WITH A C550 AT FL330. AN ACR B737 WAS DSNDED TO THE SAME ALT AS THE C550 AND CLRED DIRECT PIE WHEN ABLE. BOTH ACFT DEVIATING FOR WX. THE B737 CHANGED TO THE NEXT SECTOR AND DUE TO WX TURNED TOWARDS THE C550 AND RESPONDED TO A TCASII RA. FACILITY MGMNT JOINTLY BLAMED THE CTLRS AND THE PLTS FOR THE LOSS OF SEPARATION.

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THE SECTOR IS AN ENRTE; ARR; DEP SECTOR. NUMEROUS INBOUNDS TO MCO AND TPA. ALMOST ALL ACFT ENTERING THE SECTOR HAS TO BE MOVED AT LEAST 2000 FT. ISOLATED TSTMS IN THE AIRSPACE. THE DEP/ARR CORRIDORS ARE NOT BEING USED WELL BECAUSE OF DEVIATING ACFT; IE; HEAD ON. THE CTR'S RADIOS WERE NOT WORKING WELL; XMITTERS AND RECEIVERS. ACFT #2 WAS A FOREIGN CPR PLT AND DID NOT SPEAK GOOD ENGLISH. ACFT #1 SBOUND TO PIE HAD ASKED TO DEVIATE R OF COURSE AT FL350. ACFT #2 IS NBOUND CLBING FL330 TO FL350. I STOPPED HIM AT FL330. ACFT #2 IS 8-10 NM LATERAL SEPARATED BEFORE ACFT #1 ASKED TO DEVIATE FURTHER AWAY. ACFT #1 TURNS R 20-30 DEGS. I THINK I HAVE ENOUGH LATERAL TO DSND ACFT #1. ACFT #1 CLRNC IS 'R OF COURSE DIRECT PIE WHEN ABLE.' AFTER 8-10 NM ACFT #1 TURNS 50-60 DEGS TO THE L AND IS AIMED AT ACFT #2. I HAD SWITCHED ACFT #1 A LITTLE EARLY BECAUSE OF THE BAD FREQS. ACFT #1 HAD AN RA AND DSNDS. THE NEXT CTLR ALSO TURNED ACFT #1 R. IN MY OPINION ACFT #1 SHOULD HAVE STAYED R AND THE LOSS OF SEPARATION WOULD NOT HAVE HAPPENED. BUT ZJX MGMNT HAS BLAMED BOTH THE CTLR AND THE PLT. I HAD LOTS OF TROUBLE GETTING ACFT #2 TO ACKNOWLEDGE MY CLRNC. I CHANGED XMITTER AND RECEIVER WHEN A SECOND ACFT RPTED MY BAD XMISSIONS.