SMA ON TRAINING FLT HAS NMAC WITH LEAR JET WHEN ON FINAL APCH. CTLR TURNS RPTR ACFT INTO ONCOMING TFC.

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AT APPROX 6 MI OUT; APCH CTL CLRED ME FOR VISUAL APCH TO RWY 1L. MY HDG WAS 010 DEGS AND I WAS ON A STRAIGHT IN APCH. I WAS TOLD TO MAINTAIN 2000 FT AND NAS ON VECTORS. I WAS CONCERNED THAT IT WOULD BE DIFFICULT TO SLOW DOWN THE ACFT AND DSND TO REACH THE RWY. AT APPROX 3 MI OUT AND STILL ON APCH FREQ; I WAS INFORMED OF A LEAR WHO WOULD BE LNDG PRIOR; AND RECEIVED A COMMAND TO TURN TO 090 DEGS AND MAINTAIN 2000 FT. I SAW THE LEAR ENTERING FROM MY R. THE LEAR WAS RATHER CLOSE. I ATTEMPTED TO ASSESS THE SIT AND WAS GIVEN THE COMMAND AGAIN. I THOUGHT IT RATHER ODD THAT THE CTLR WOULD BE TURNING ME TOWARD THE TFC; TURNING ME OFF THE EXTENDED CTRLINE WHEN I WAS CLRED FOR THE APCH; AND THAT I HADN'T BEEN TURNED OVER TO TWR AT THIS POINT. IN THE CONFUSION; I HAD INADVERTENTLY DSNDED BTWN 200 AND 400 FT; BUT I MADE THE TURN AS REQUESTED BY ATC. THE LEAR HAD BEEN TOLD TO 'KEEP IT TIGHT' BUT HADN'T; AND PASSED UNDER MY NOSE; BARELY MISSING ME. BY THIS TIME I WAS APPROX 2 1/2 MI FROM RWY THRESHOLD AND AT HDG 090 DEGS AND WAS TURNED OVER TO TWR WHO CLRED ME TO LAND WITH 'S TURNS APPROVED.' THIS IS NOT STANDARD PROC IN A TWIN; BUT I COMPLIED; STILL SHAKEN BY THE NEAR MISS. I LANDED WITHOUT FURTHER INCIDENT. ATC SHOULD HAVE EITHER GIVEN THE LEAR A 360 DEG TURN FOR SPACING; SLOWED HIM DOWN SO SPDS WERE COMPATIBLE; OR GIVEN HIM RWY 01R. THEY ALSO COULD HAVE GIVEN ME A 360 DEG; BUT TURNING ME TOWARD OPPOSING TFC WAS COUNTER INTUITIVE TO BASIC SURVIVAL INSTINCTS. GIVING S TURNS TO A TWIN WAS ALSO A POTENTIALLY DANGEROUS SIT IN CASE OF SINGLE ENG FAILURE. I BELIEVE THAT APCH FORGOT ABOUT ME AND WAS ATTEMPTING TO RECTIFY THE ENSUING TFC CONFLICT. IN RETROSPECT; I SHOULD HAVE COMPLIED MORE QUICKLY WITH ATC'S INSTRUCTION; BUT IT DID NOT SEEM SAFE TO DO SO AT THAT TIME. I ALSO SHOULD HAVE MAINTAINED ALT AND REQUESTED A GAR OR A 360 DEG. IT SEEMED THAT THE LEAR WAS GIVEN PRIORITY ALTHOUGH MY APCH SPD WAS PROBABLY ONLY 20 KTS LESS THAN HIS; AND I WAS ALREADY ESTABLISHED ON EXTENDED CTRLINE AND HAD BEEN CLRED FOR A VISUAL APCH. ALSO; CLRING SOMEONE FOR A VISUAL APCH WITH AN ALT RESTR MADE NO SENSE. 'SLAM DUNKING' A TWIN IS NOT RECOMMENDED; ESPECIALLY ON A NIGHT OF VERY LIGHT TFC.