Information about the universal chassis that basically seems to combine Wei-Ya 820H and 821H, allowing for tubes with high or low impedance vertical windings.

• Switch on the left middle is HIGH or LOW impedance. You can adjust in vertical height from either mode on my tube, but it seems to affect pincushion.
• Pins on the upper right are "WIDE" and "NARROW", selecting between two caps.
• The wide setting puts another 39nF capacitor in parallel with the existing 39nF (630V393) polypropylene. So I'm going to get a few caps around this number and replace. Logically a slightly capacitance would lead to a wider picture. I'm trying Panasonic ECQE series, 630VDC rated, metallized polyester, 47nF (0.047uF) and 68nF (0.068uF).
• VR901 is the B+ adjustment. Increasing this will increase the image size. Not known if running this too high or too low is bad for the chassis. Factory setting not known (keep forgetting to check).