Hello all.  New guy, here.  Cool place.  I just picked up a crusty Studio Pro 40 last week and am loving the sounds to be had.  Needs a good cleaning, and de-ox on the pots and connectors.  The only other issue I see is the reverb, which introduced a volume drop and gnarly distortion as I dialed up the control.  I haven't tried to troubleshoot the issue yet, but if it comes down to the reverb pan itself does anyone know what model it would be?  It's about 9" long, so I'm thinking perhaps an 8eb unit, but I'm not sure.  I've sent email to Peavey on it, but haven't received a reply.  Thanks for any help.