Well, I think the OP discovered for himself what we have been saying all along.
Some people just gotta learn the hard way
Another thing with tubes is that the tubes themselves can make a huge difference to the way the amp sounds.
But hey, as long as the OP is enjoying the hobby and has learned from his experiences, then I won't rain on his parade.
On side note....my Dynaco ST-70 has no output on the right channel
I'm not sure what happened, and I haven't had time to even think about troubleshooting it. All the tubes light up, and I was able to correctly set the bias, but that's about all I know at this point. I did an upgrade to provide taps for both 4 and 8 ohm speakers a while back, but it worked fine for several months after that. Of course when something fails, I always start with the last thing that was changed.