CTLR VECTORED CLIMBING SVFR DEP THROUGH THE PATH OF INBOUND IFR WITH NO ALT SEPARATION; RESULTING IN LESS THAN STANDARD SEPARATION.

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I WAS VECTORING SMT X INBND; IFR; FOR AN ILS APCH. LCL CTL CALLED ME ON OVERRIDE REQUESTING A SVFR RELEASE FOR SMA Y NBOUND TO 1A0. 1A0 IS A VFR ARPT APPROX 8 MI N OF CHA ARPT; W OF THE ARR/DEP PATH FOR RWY 20; INSIDE THE W SECTOR AIRSPACE. I ASKED IF THE SMA Y WAS IMMEDIATELY READY TO DEPART AND WAS TOLD YES. I RELEASED THE ACFT; ANTICIPATING A W TURNOUT WHICH IS STANDARD. I WIDENED SMT X'S PATTERN VECTORS; ANTICIPATING THE WBOUND COURSE OF SMA Y AND THE PROX OF 1A0 TO THE ARR COURSE. WHEN SMA Y DEPARTED AND CONTACTED ME; I WAS INITIALLY UNABLE TO ESTABLISH RADAR IDENT. I DETERMINED THAT THE ACFT WAS IN A LEFT TURN TO 1A0 WHICH IS NONSTANDARD. DUE TO THE ACFT'S PROX TO THE RADAR ANTENNA (WHICH IS ON THE ARPT) I WAS UNABLE TO ESTABLISH RADAR CONTACT UNTIL THE ACFT WAS 1/2 MI E OF THE ARPT ABEAM AND PARALLELING THE RWY ON A 020 DEG HDG. AT THIS TIME I INSTRUCTED THE ACFT TO ADVISE ME PRIOR TO CLBING ABOVE 25 AND INDICATED SUCH ON THE STRIP. AT THIS TIME; I ANTICIPATED ENSURING ALT SEP BY HAVING SMA Y PASS ABOVE SMT X. THE ERROR WAS HUMAN. IT OCCURRED WHEN I LOOKED AT THE STRIP ON SMA Y AND ERRONEOUSLY CONCLUDED THAT HE WAS LEVEL AT 25. THE ACFT DID NOT HAVE MODE C. I VECTORED SMA Y ACROSS THE APCH PATH IN FRONT OF SMT X; AND COURSE DIVERGENCE WAS ESTABLISHED; BUT NOT BEFORE THE ACFT WERE WITHIN 1 MI AND 100' OF EACH OTHER. WHEN I REALIZED THAT THE ACFT WAS NOT AT 25; AND THAT I DID NOT HAVE STANDARD SEP; I ISSUED AN EVASIVE TURN TO SMT X; WHO RPTED THE TFC IN SIGHT. POSSIBLE CONTRIBUTING FACTORS: NO STANDARD SVFR PROCS LOCALLY. ACFT NOT ISSUED HDG TO FLY BY LC. LACK OF RADAR IDENT. COORD CONFUSION BTWN LC AND RADAR. COORD BTWN E/W RADAR WHEN ACFT TURNED INTO E AIRSPACE. OTHER ACFT CALLING ON FREQ; POSSIBLY DIVERTING ATTN. HUMAN PERFORMANCE CONSIDERATIONS: 3RD DAY BACK AFTER NINE DAYS OFF. 1ST HOUR OF 8 AM SHIFT AFTER 2-10 PM SHIFT PREVIOUS DAY. NO MATTER HOW MANY CONTRIBUTING FACTORS WERE INVOLVED; THE ERROR STILL RESTS WITH ME. I READ 25 ON THE STRIP; SOMEHOW GOT IT IN MY HEAD THAT THE ACFT WAS LEVEL AT THAT ALT AND ISSUED MY INSTRUCTIONS WITH THAT IN MIND. IN THE TIME IT TOOK ME TO REALIZE THAT THAT WAS NOT THE CASE; THE OP ERROR HAD OCCURRED. TO PREVENT A RECURRENCE: ESTABLISH SPECIFIC COORD PROCS FOR SVFR DEPS REFERENCE INTENDED HDGS; CONTROL SECTORS. READ AND REREAD STRIPS; USE CLBING OR DSNDING ARROWS ON STRIPS: ESPECIALLY WHEN ACFT DO NOT HAVE MODE C.