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Re: Dynaco Stereo 70 and PAS-3 Combo - Better Than I Thought Possible...

Posted by Sector-7G on September 1, 2004 at 08:29:05:
Hey-hey!!!,
I will add my opinion to the rest, in that you have no idea how much better it can get. Sell the PAS to fund the project. Get a second 060 and a pair of big chokes and go monoblock and choke input, on a proper sized chassis.
The front end will be the next to go, so the 7199's will also get sold to fund the Iron diet. If you do it with a second St.70, the spare pair of outputs will also go to fund the Iron mongers.
PP grid chokes, and individual bias would be a good place to start, even before doing any of the other more extensive mods...270k is WAY too big a grid resistor for the EL34 in my experience.
Get a Bottlehead ForePlay manual and build it with DC filaments, proper Iron and 12SN7's for a parts bill of <$180 ( I think the VTV 6SN7 linestage is a very similar beastie, look at this one too ).
If you are pleased now, I can hardly wait to see what you post about when you have done some real improvement.
regards,
Douglas