I must say the sound is awesome! More detailed, fuller, more bass, tight not muddy, better soundstage and detailed highs. Incredible sound through my stacked Large Advents @ a 4 ohm load.
I have a couple of questions though. First I am using my PAS3 instead of my McIntosh MX110. Why in the hell would Dynaco put out a preamp that would not be suited to the ST70? I have ordered the 1uF caps to install. Second, I have biased the tubes to .4 vt each. However I get a reading of 33 mA instead of 40 mA. What gives? I have not set the AC balance yet because I do not have a scope. I will do that Tuesday. But I am trying to figure out why I do not have 40 mA on each tube. I installed the 10 ohm resistors tying pin 1 and 8 together to ground. I installed new 1K 1 watt resistors on each tube also. What am I missing? Can I set the bias on each tube for 40 mA?