The differences between this amp and the previous build are the tubes and layout of the build. Last build had input stage in one chassis and output stage in another with separate psu's. This one has one chassis for psu's and filament supplies. And one signal chassis. Much, much better layout!
The first amp had oscillation problems in the psu's. Got rid of most of it when I took out the rectifier tubes and replaced them with diodes, but still the oscillation came creeping back. So I decided to start from scratch and build a new, more thought out amplifier. Also wanted it to drive speakers, which it does flawlessly! I have a pair of Monitor Audio Bronze 2's hooked up to it in my lab/listening room. Sounds very good!
Tube choices (6C8G + 47) were based on tube characteristics as well as aesthetics. I chose DH output tubes just because I wanted to go "all out" even though same fidelity can be had with IDH tubes. Also I'm a tinkerer and love projects and challenges!
Amp is complete. I've used it daily for a few weeks. I just now got time/energy to do the power output test.