[Penthode]

Further update. Aiming to get the overall convergence as best as possible, these are the adjustments I made.

1. Measuring at the MOSFET drain set Vertical Conv. Amplitude to around 400v p-p
2. Adjust Vertical Ampl. Shape to make best parabola.
3. Adjust Vert Conv. Amplitude to 800vp-p to the point clipping is about to occur. (Minor clipping in the center or minimum amplitude is not detrimental to the convergence).
4. Touch up Vertical Amplitude Shape to bring in convergence at top and bottom of screen.

I found that by increasing the output coupling capacitor to 0.03uF provided enough to bring into best convergence.

The power supply even at 850v dc is only just enough. I considered including the quintupler to yield about 1200v but I am happy with how it currently performs. Focus and convergence is really good.

Judge for yourself I fiddled with the convergence for a bit and could perhaps make it better. But it is good enough for me.

I will begin packaging it up into the old transformer metal box. One I have this in place I can address the AGC and full white blooming resolution. These items I will address in separate threads.

See the attached off screen photos and I welcome any criticism. I am curious how good the convergence is on other CT100s.