Magic eyes. Here are some really inexpensive boards that are a good starting point. They have a 12V jack, 3.5mm audio jack and a power switch out of the way in the back. This first one includes a Chinese EM84:
The second is almost identical. It uses three different sockets for three different pinouts: EM80/81, EM800/EM84 or a Soviet 6E5S:
The seller has all three sockets. I bought six boards and two sets of sockets. I also scored two or three each of the tubes listed above. The only caveat with these particular boards is that the 6V regulator and the power MOSFET don't have heatsinks and I haven't been able to find any small enough to fit (there's almost no room). The first board has an LM317 and it gets hotter than the LM7806.
The 6E5S really heats things up. My eternal thanks to anyone who can find an affordable TO-220 heatsink that's barely larger than the horizontal TTR itself.
My apologies if I've already talked about this before. I'm very happy with what I ended up with and like to share. 8D
I really do need to post this info to my blog but I haven't had time to take pictures and shoot video. Sound familiar?
Terry Bowman, KA4HJH
"The Mac Doctor"
"If only you could see what I've seen with your eyes."—Roy Batty, Blade Runner