I have 2 dynaco st-70's for sale.
1 is a bone stock unit everything new but transformers and sockets but they were checked and cleaned
2 is stock set up with a triode board with the 1 12au7 and 2 ef86's this board will allow you to do a lot of output tube changes.
Both amps have new rca jacks,bias section,main quad cap and bias adjustment potentiometers all new parts and resistors. the bone stock amp has aftermarket speaker binding posts. the other is all original.
Please feel free to pm me for any questions. will send pics to your e-mail they are to big to post here.
Just to much work done to be listed i'll be here all day.