A TB10 TOBAGO PLT GETS CONFUSED DURING HIS ILS APCH TO MYF WHEN HE IS ISSUED A STRANGE FREQ FOR THE TWR. TEXT STATES THAT 'LINDBERGH TWR' WAS SAID; VERSUS 'MONTGOMERY TWR.' RPTR DOES A 360 DEG ON FINAL TO ATC'S CONCERN.

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APCH NAV FREQS CURRENTLY SET AND VERIFIED. TURN TO INTERCEPT LOC NORMAL AND BOTH LOC AND GS NEEDLES CTRED. CLRNC TO COMPLETE THE APCH GIVEN AND ACKNOWLEDGED; ALTHOUGH R/T VOLUME WAS VERY HIGH. ALTHOUGH ON A VECTORED INST APCH; CONDITIONS WERE VFR AND IN VIEW OF HIGH VFR TFC VOLUME A VFR SCAN WAS MAINTAINED AS WELL MONITOR OF PANEL INDICATIONS. APPROX 1 NM OUTSIDE LOM (ESTIMATE SINCE AURAL INDICATIONS OBSCURED MY R/T TFC AND PANEL INDICATION OF APCH AND PASSAGE NOT RECALLED); APCH DIRECTED SHIFT TO TWR FREQ. HOWEVER; INSTEAD OF EXPECTED 'CONTACT MFY TWR ON 119.2' THE FOLLOWING RECEIVED: '...CONTACT 125.7...LINDBERGH TWR.' THIS WAS A FREQ I WAS NOT FAMILIAR WITH; AND WHICH IS NOT SHOWN ON APCH PLATE. AT THIS POINT WHAT HAD BEEN A NORMAL APCH TO THE ILS BEGAN TO DETERIORATE. MY INITIAL THOUGHT (DESPITE CORRECT PANEL INDICATIONS) WAS THAT APCH THINKS I AM INBOUND TO SAN AND SOMEHOW I HAVE ENDED UP IN THE SAN APCH STREAM. DUE TO R/T VOLUME; I WAS NOT ABLE TO GET IN TO THE CTLR TO CLARIFY. THE SIT COMPOUNDED WHEN I LOOKED R AND SAW AN ARPT WITH AN E/W RWY LOW AND 3 O'CLOCK POS. I THOUGHT (AGAIN DESPITE CORRECTLY CTRED NEEDLES) THAT I WAS PASSING MYF TO THE L (ARPT WAS SEE). DUE TO THE LOW HAZE; I COULD NOT SEE VISUALLY WHERE INST INDICATIONS INDICATED MYF SHOULD BE. AT THIS POINT MY SPATIAL AND SITUATIONAL AWARENESS DETERIORATED. I TRIED AGAIN TO RAISE APCH WITH NO RESULT AND ELECTED TO EXECUTE A SLOW 360 DEG TURN IN ORDER TO ATTEMPT TO CLARIFY MY POS. HALFWAY THROUGH THE TURN APCH CONTACTED ME AND ASKED IF I WAS TURNING. I VERIFIED THAT I WAS AND REQUESTED VERIFICATION OF THE GIVEN FREQ (125.7) AND MY LOCATION. THE FREQ WAS VERIFIED AND THE STUPIDITY OF MY TURNING MANEUVER POINTED OUT. I ROLLED ONTO THE FINAL APCH LEG AND WAS TOLD I WAS NOW ON VISUAL APCH TO THE RWY 28R. THE REMAINING LEG OF THE APCH AND LNDG WAS COMPLETED WITHOUT INCIDENT. I WAS DIRECTED TO CONTACT SOCAL TRACON SUPVR (NOT UNEXPECTED). WE DISCUSSED THE STUPIDITY OF MY MANEUVER AT SOME LENGTH; A DISCUSSION WHICH I AGREED WITH. CONTRIBUTING FACTORS: TWR FREQ NOT COMMONLY USED; HIGH R/T VOLUME FOR SAN TFC; PLT FATIGUE DUE TO COCKPIT HEAT (HELD ON GND AT EMT FOR 30 MINS AWAITING FLOW RELEASE); SPLIT ATTN BTWN INST APCH AND VFR SCAN; REDUCED VISUAL GND CUES AND FAILURE TO TRUST INST INDICATIONS. ALL COMBINING TO CREATE LOSS OF SITUATIONAL AND SPATIAL AWARENESS.