Refurbish a Dynaco St70

Do not waste your time, and your money on a re build. It would not be cost effective. Even if you have the original circuit diagram, and original parts list, I doubt you could find current components that will work. Move on to other tube products, mostly from China that are a good value. Check out the Cayin line, great sound, great value. Better yet look for a Sound Values, M60 tube amplifier. The come up on ebay often. I have a pair and they sound great. They were a knock off of the St60, from the firm that brought up all the parts inventory of Dynaco went out of business.

Talk to these guys

http://enjoythemusic.com/magazine/manufacture/0902/index.html

I meant look at this. There are a number of places the redo these, although it may be cheaper to buy a renovated model used.

Thanks for the responses. I will check into enjoythemusic. I have considered that the cost might not be worth it on a strictly sonic basis. Such an historic amp and in such great shape thought it worth checking into. If is decide not to do anything with it I hope to find someone interested.