AN ACR FLC FLYING B727-200 INTO CVG BECOMES DISTR ON APCH BECAUSE OF UNFAMILIARITY WITH AVIONICS EQUIP RESULTING IN A TRACK DEV.

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FLYING FROM ORD DIRECT CVG IN A B737-200 ON THE FIRST LEG OF THE SECOND DAY OF A 4 DAY ROTATION. THIS PARTICULAR B737 IS DIFFERENT FROM THE REST OF THE 200 FLEET. IT HAS A MANUAL AUTOPLT WHICH ALLOWS CTL STICK STEERING. IT HAS NO ALT CAPTURE AND IS CAT I RESTR. THE FLT DIRECTOR GIVES A STEERING CUE; BUT THE PITCH MUST BE SET MANUALLY. THIS WAS MY FIRST TIME IN THIS ACFT. I HAD FLOWN IT TO ORD THE PREVIOUS NIGHT AND WAS NOW THE PNF ON THE LEG BACK TO CVG. THE COPLT WAS ALSO UNFAMILIAR; WITH ABOUT THE SAME EXPERIENCE IN TYPE AS ME. UPON ARR INTO CVG WE WERE INSTRUCTED TO INTERCEPT THE CVG RWY 18R LOC. I TUNED IN THE FREQ FOR RWY 18L LOC. MY APCH PLATES WERE IN MY MANUAL WITH RWY 18L&R PLATES OPEN; SIDE-BY-SIDE. AS THE WX WAS VFR AND ONCE WE WERE WITHIN VISUAL CONTACT WITH THE FIELD (ABOUT 7-10 MI); WE WOULD ACCEPT A VISUAL APCH; I LEFT MY PLATES IN MY MANUAL. THE COPLT HAD PLACED HIS RWY 18R PLATE ON HIS YOKE CLIPBOARD; BUT AS HE WAS BUSY TRYING TO MANAGE AN UNFAMILIAR AUTOPLT AND COCKPIT DURING A BUSY TIME; HE FAILED TO DOUBLECHK THE CORRECT FREQ. WE; THEREFORE; INTERCEPTED THE WRONG LOC AND CAUSED ANOTHER ACFT TO BE VECTORED OUT OF OUR WAY BEFORE WE WERE VECTORED OFF THE RWY 18L LOC AND TO OUR PROPER LOC; RWY 18R. IN A SENSE; WE WERE SET UP FOR MAKING A MISTAKE. OUR TRAINING FOR THIS ACFT CONSISTED OF LOOKING AT A SET OF COMPUTER SLIDES. IN BOTH CASES (MINE AND THE FO'S) THIS WAS OVER 6 MONTHS AGO. BECAUSE OF THE EXTRA TIME NEEDED JUST TO FLY AND MONITOR; WE GOT OUT OF OUR HABIT PATTERNS. EVEN SO; ESPECIALLY WHEN I AM IN AN UNFAMILIAR ACFT; I SHOULD BE EXTRA VIGILANT AND IN THIS I FAILED.