I finally found the problem - a bad horizontal yoke connection.
The HV is up to about 14 kv now.
Here are the first images I got using the rectangular 8XP4. First, using a B&K 1077B which is in need of an overhaul. Next, a low power analog broadcast picked up with rabbit ears.
I'm getting some weird clipping so I switched back to the round 5AXP4 and did some tweaking.
Almost every control is crammed into one corner. It's convenient, but a little tough when you have big hands.
Next, I fired up a Leader test pattern generator. The RF output on it is too weak to produce a decent picture so I fed it into a BT modulator. It's not just his set - the Leader RF is just too weak for any set I've tried it on.
Here are the alignment, convergence and multi-burst patterns. I'll hold off on making an more adjustments until the 19AP4 has been installed.
Finally, I hooked up a DTV convertor box. No sound, but I was expecting that. I have a couple of these Access HD DTA1010 boxes and get very weak or no sound on most of my vintage sets. One solution I've used is to feed the composite output from the converter into a BT modulator.
I'm going to clean up some temporary repairs and clear off the workbench before remounting that 19AP4.