ok, this scares the shit out of me. hennyo level of quality here.
Second pic, the power supply in the upper right is an ebay high voltage switcher that's $7
I know its $7 because I bought some for the up and coming stax mafia portable, and its actually a pretty decent supply but can handle only about 5 watts of output power.
You can see two more under the fan. Fan is required because those things get hot especially when you try to push them over 8 watts. And according to people at diyaudio that use them for tube preamps, the main diodes blow up at 10 watts.
No way is this a kgsshv-carbon in terms of power. Barely 10% if that. Also limited to about 400v
A pair of switchers on either side of the pot drive the HV supplies. So Switchers driving switchers. Not the most quiet of things.
And the rest of it, yikes
power supply pics here