Brooks Harlan is your man for Baltimore repair guys. He doesn't have a "real" website so here is his facebook page for the business. Just shoot him an e-mail:
Big Crunch - Amp & Guitar Repair - Local Business - Baltimore, MD - Info | Facebook
He works out of the same building as the Magpie Cage recording studio, has done work for Wino, Clutch, etc. I took my SVT in fault mode there a couple months ago. He charged me a $45 bench fee, had a slightly used power tube laying around that was a good match for my shorted tube and I ended up paying $65 total. I had him do some work on my SVT-3 Pro a couple years ago too. Very nice guy and very knowledgeable.