[miniman82]

Same way it's done in the production chassis, though the values in the bleeder string are double what the CT-100 has. That's why I'm going to experiment with those parts, I have some different ones on the way right now. What I'm not sure about is if the convergence grid needs more current, or needs to be current limited by more series resistance. It was getting closer to being good with more voltage on it, but it also drew more current at higher settings. We tried to lower the value of the first resistor in the string (before the convergence pot), but it got very hot as it was burning off about 9000 volts. I'm still convinced that most of the problem was the ultor voltage drifting up as convergence voltage also went up; in other words, convergence always lagged ultor voltage no matter what we did. If I can get the ultor voltage to sit still while pushing convergence a tad higher, I think that will be a step in the right direction. That's the reason for tying the HV pot to B+Boost, rather than having it at the end of the bleeder string where its voltage supply (and hence shunt regulator operating point) can be influenced by current draw from the convergence grid.