PLT OF AN SMA SEL ACFT TOOK EVASIVE ACTION TO AVOID WAKE TURB OF A WDB ACFT RESULTING IN AN MLG ACFT CLBING OFF OF ASSIGNED ALT IN RESPONSE TO A TCASII RA GENERATED BY THE SMA ACFT CLBING.

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ON SUNDAY MORNING; AUG/XX/93; MY WIFE AND I DEPARTED CABLE ARPT (CCB) IN UPLAND; CA; FOR A FLT TO OCEANSIDE; CA (L32). OUR COURSE WAS V363 S FROM POM VOR TO KRAUZ V23 OCN. THIS WAS A VFR FLT. NO FLT PLAN WAS FILED. DEP TIME WAS APPROX XY30 AM LCL. OUR ACFT IS AN SMA SEL. AFTER DEPARTING CABLE; I CONTACTED ONT APCH CTL. THEY HANDED ME OFF TO COAST APCH. AT APPROX 15 NM S OF POM VOR; COAST APCH ADVISED ME OF A WDB XING IN FRONT OF ME; AT APPROX THE SAME TIME I HAD VISUAL CONTACT OF THIS ACFT. AS THE 2 OF US GOT CLOSER TOGETHER; IT WAS EVIDENT TO ME THAT I WAS GOING TO CROSS HIS WAKE TURB AT 1/4 - 1/2 MI BEHIND HIM. A FEW SECONDS BEFORE THIS; APCH CALLED ADDITIONAL TFC OFF MY L WING; AN MLG AT 6000 FT. AS I GOT TO WITHIN 1/2 MI OF THE WDB; I TOLD THE CTLR I WAS TURNING L TO MISS THE WDB. HE AGAIN ADVISED ME OF THE TFC ON MY L; WHICH I NOW HAD IN SIGHT. IN MAKING THE TURN TO AVOID THE WDB AND TRYING TO ESTIMATE ITS WAKE; I CLBED APPROX 200 FT TO 5700 FT MSL. APPARENTLY THIS CAUSED THE TCASII TO CALL FOR A CLB ATTITUDE. I BELIEVE WE WERE APPROX 1/2 MI APART AND HE WAS SOMEWHAT HIGHER THAN I. WHEN I LANDED AT OCEANSIDE; I RECEIVED A PHONE CALL FROM APCH CTL ADVISING ME OF THIS INCIDENT AND ASKING FOR MY VERSION OF WHAT HAPPENED. I DO NOT KNOW IF ANY FORMAL RPT WILL BE FILED BY APCH CTL. IN NEARLY 1500 HRS OF ACCIDENT-FREE FLYING; MOST OF WHICH HAS BEEN IN THE SYS; THIS WAS THE FIRST TIME I HAVE HAD SUCH AN INCIDENT. IN REVIEWING THIS INCIDENT IN MY MIND NUMEROUS TIMES; I BELIEVE THIS SIT COULD HAVE BEEN AVOIDED IF APCH CTL HAD VECTORED ME AROUND THIS TFC; RATHER THAN ALLOWING ALL 3 ACFT TO CONTINUE ON A COURSE THAT COULD HAVE FINISHED IN DISASTER. SUPPLEMENTAL INFO FROM ACN 250400: WE WERE ASSIGNED A HDG OF 250 DEGS AND AN ALT OF 6000 FT. WE WERE ADVISED OF TFC AT 1 O'CLOCK AT 5500 FT. TFC SHOWED UP ON OUR TCASII SHOWING 500 FT BELOW US; BUT THEN WE NOTICED BY TCASII THAT HE WAS CLBING SLOWLY. WHILE TRYING TO MAKE VISUAL CONTACT WE GOT A TCASII RA COMMANDING A CLB OF 2300 FPM. WE EXCEED 6700 FT BEFORE TCASII WENT TO TA. DURING THE EVASIVE CLB I NOTICED SMA TFC AT 2-3 O'CLOCK AND ADVISED ATC OF THE TCASII RA AND OUR ALT. HE ASKED THE SMA IF HE WAS CLBING AND HE ACKNOWLEDGED THAT HE HAD CLBED ABOVE 5500 FT. WE RETURNED TO 6000 FT ASAP AND COMPLETED APCH AND LNDG WITHOUT FURTHER INCIDENT.