HDG TRACK POS DEV DURING VOR RADIAL INTERCEPT MANEUVER.

Narrative

WE DEPARTED THE WILEY POST ARPT (PWA); OKC ENRTE TO FT WORTH; TX. OUR CLRNC WAS TRACK THE IRW 167 DEG RADIAL OUTBOUND TO INTERCEPT THE ADM 321 DEG RADIAL ADM. AFTER TRACKING THE 167 DEG RADIAL FOR A TIME LONG ENOUGH TO HAVE INTERCEPTED THE ADM 321 DEG RADIAL I DISCOVERED THE WRONG FREQ HAD BEEN ENTERED INTO THE RECEIVER. THE ADM FREQ IS 116.7. THE BRIDGEPORT VOR FREQ (BPR); WHICH IS ONLY 66 MI FROM ADM IS 116.5. THE PROB WAS IN THE FACT THAT THAT STATION WAS CLOSE ENOUGH AND STRONG ENOUGH TO RECEIVE AT THAT ALT WHICH MADE IT LOOK GOOD WITH NO FLAGS AND THE PROPER TO-FROM INDICATION. OUR ACFT HAS THE KING FLIP FLOP SELECTORS (KX165) AND MAKE IT EVEN MORE EASILY CONFUSED 116.7 WAS ON ONE SIDE - STANDBY AND 116.5 WAS ON THE OTHER; IN USE - SIDE. BOTH ON THE #2 NAV RECEIVER. THE REASON FOR THAT WAS THE FACT THAT BPR 116.5 WAS THE NEXT VOR IN OUR CLRNC. THE CTLR MADE US AWARE THAT WE HAD OVERSHOT OUR INBOUND RADIAL AND CLRED US DIRECT TO OUR DEST. WE HAVE SET UP A DOUBLE-CHKING PROC TO COVER THE MISUSE OF THE FLIP FLOP FEATURE OF THESE RECEIVERS ESPECIALLY WHEN THE FREQS ARE SO CLOSE TOGETHER. WE BELIEVE THE BEST WAY TO PROTECT OURSELVES WITH THIS IS A CHKLIST ENTRY IN THE TKOF-CLB-CRUISE; APCH TO LNDG WARNING OFF POSSIBLE WRONG FREQ IN THE 'IN USE' SIDE OF THE RECEIVER.