FA20 CREW RECEIVE A TERRAIN ALERT WHEN INADVERTENTLY VECTORED BY ALB APCH CTLR BELOW MVA.

Narrative

ACFT X WAS ON A RADAR VECTOR EBOUND AND DSNDING TO 4000 FT TO AVOID NBOUND BE02 TFC DSNDING TO 5000 FT FROM THE S. WE THEN CHANGED RWYS AND BE02 TFC NO LONGER A FACTOR. ACFT X WAS THEN GIVEN A VECTOR TO THE LOC RWY 26 APCH AT PSF. THIS VECTOR CUT ACROSS AN MVA AREA OF 4700 FT. HE WAS DSNDING TO 4000 FT. AS HE CROSSED THE MVA BOUNDARY; HE ASKED TO VERIFY 4000 FT. I CLBED HIM TO 4700 FT TO COMPLY WITH MVA OF 4700 FT. HE SAID HE HAD A TERRAIN ALERT. HE COMPLETED THE REST OF FLT NORMALLY AND LANDED WITHOUT FURTHER INCIDENT. I BELIEVE THIS SIT HAPPENED DUE TO SEVERAL FACTORS: 1) BUSY SESSION. ANOTHER SCOPE SHOULD HAVE BEEN OPEN (IE; FV). 2) RWY CHANGE. 3) JUST GOT ON POS AND SCOPE CONFIGN WAS (IN MY OPINION) TOTALLY WRONG CONFIGN. VERY HARD TO WORK TFC WHILE SCRAMBLING TO SET UP YOUR SCOPE. THESE ARE THE NEW STARS' SCOPES WITH NUMEROUS ADJUSTMENTS. 4) OPENED FINAL 'AFTER THE FACT' WHICH MAKES THE SIT EVEN MORE COMPLEX. 5) PRACTICE APCHS GOING ON. THE PLT CALLED AND SAID HE WAS VMC AND COULD SEE THE TERRAIN. MOUNT GREYLOCK IS THE TERRAIN IN QUESTION. MY VECTORS PUT HIM AT ABOUT 3 MI FROM IT. HIS ALT 4400 FT CLBING TO 4700 FT. MVA THERE WAS 4700 FT.