Just bought a Tripp Lite 4.5 amp regulated PS off the bay used for 30 bucks shipped.
I did fire mine up with stock tubes and the wall wart that came with and can see what you guys like about it. Seems pretty good, nice and crisp for low level listening. It distorts more than my current preamp (Yamaha C-4) so would not want to listen at high levels so much as is. But at low levels competing with, maybe better than the Yammi. It's definitely a different sound, and the upper octaves seem plenty there.
By middle of month can try with the better PS and fancy Russian tubes, should be interesting.