I have an excellent sounding Dynaco ST-70 with the VTA mod board with Auricap upgrade. This board replaces the 7199 driver tubes with three 12AT7's. It also allows for individual biasing of each output tube so you can now use tubes that are not matched to each other. The can cap has been upgraded to the larger capacitance 80/40/30/20 can and the input RCA's have been replaced.
Chassis could use some polishing. There is a bit of pitting here and there. Brown top cage is in very nice shape.
Amp comes with three Mullard EL34's and two matched Mesa/Boogie EL34's. Also has a Mullard 5AR4 rectifier. I'll have to look to see if I have three extra 12AT7's around here otherwise they are not included.
This amp looks decent and sounds incredible. Far better than in stock form.
Asking $500 plus shipping. Not looking for any trades at this time.
PM with any questions you may have.
Thanks for lookin'
Rex
