It depends on what you're looking for from the amp. If you want to preserve its original circuitry and tone, I'd say Will Vincent does a nice restoration of the original with a few small upgrades; for a bit more modification of the circuit the Curcio has had many nice things said about it. If you want to radically overhaul the amp, get Kevin Carter's ST-70 upgrade kit from K&K Audio. It utilizes the chassis and the output transformers from the original, but upgrades the entire circuit board, power supply and power transformer, and gives you a lot of flexibility in output tube choices right up to a KT120.
Who Can I send my dynakit ST-70 to for a rebuild?
I am looking for someone to re-build my Dynakit ST-70. It works as is right now but, I want to upgrade it. I want to upgrade the power supply, the caps and PC board. I also want to give it a face lift and move the inputs to the rear panel. Who does this kind of work? I know will vincent used to restore these but, I can't find a way to contact him. Does anyone else do a good job on them? Thanks.
Andy
Andy