I offer both repair and modification services for tube amps.
I pride myself on quality work, and quick turnaround. As a gigging musician myself, I understand that you need your amp fixed now, not in a week . 
My prices are extremely competitive, and I'll be happy to give you a quote over the phone.
Repair services include, but are not limited to :
-Diagnosis and repair of non-functioning guitar and bass amplifiers
-Diagnosis and repair of amps that "don't quite sound right"
-Preventive maintenance, including cap jobs and re-tube/re-bias
Modifications (Mods), are another service that we offer. Whether you want to take some of the flub out of that old Fender, or add a little more gain to your JCM800, give me a call.  I also do a lot of D-style mods to Fender-type circuits, as well as converting old PAs to rippin guitar amps. If you can dream it, I can build it.