I first tried swapping the interconnects, no change, same side. I next swapped the 7199s, noticing that the left front power tube and the 7199 on the left side were only warm, while the other power tubes (including the back left one) where up to temp.
The 7199 now came up to bright and temp when moved to the right. The other now, dark and cold....
The power tubes did the same when swapped, ie; everything on the right, and the back left tube were bright and hot, while the left 7199 and the front left el-34 were only midly warm ( actually didn't notice at the 7199 at all.)
I don't have a spare rectifier tube (got one on order now, tho.) I do have a Sylvania 5v4ga , and a RCA 5r4xxb in the heathkits.
Is this likely a rectifier tube gone bad?
I'm going to follow the Curcio audio engineering "Dynaco Stereo 70 repair guide" as I delve into this, but not until I change out the rectifier tube, as the possible culprit.
As you might guess, I'm fairly new to tubes, and without a tube tester, or even a good substitution manual.....