"I remember meter shunts being available in 2 different types - one was 100mV
and the other might have been something like 70mV.

It was usually printed in a corner of the dial plate so you could order the
right shunt. "

What Terrell say about the bridge rectifier only introducing about a volt of error only applies if there is no shunt. I am not sure. Now this Keithley we got has a shunt but will ot rui into 10 megs, so that leaves regular VTVMs out.

These totally passive HV probes must load more than a 1090 meg one, and certainly do for the Keithley probe which is way up in the gigohms. I forget the specs but the resistance is very high.

I am not so sure we need it that high. A CRT pulls current, some even do a bit on the focus electrode though I think i a perfect one it doesn't. But there is current from the cathode to anode so I think 1100 megs will be high enough to determine if it is i regulation and whatever. Most of the scope print I have seen seem to indicate it would be alright for the control grid or the blanking grid as well. That is what we need. We are not measuring the output of a Van De Graff generator here.

Still waiting to hear if all the low voltage supplies are there. Many of the older Tek CROs used the supply that fed the 15V regulator, unregulated and just regulated the HV directly.There could be fusibles to that supply. Sorry, but I am just about doe studying prints for people, let them download them and have a look, ad maybe learn something in the process. I am tired, half blind and my computer is quite full. I am tired of going to BAMA, electrotanya, hifiengie and that 401 whatever for nothing, I don't even do that for work anymore since my computer there disappeared. I couldn't stand the thing anyway with Win 10 on it. Can't up the font so I can see the damn thing, can't change the homepage to Google, fukit. I get paid by the hour and if they slow me down it costs me NOTHING. It costs them. I am tired of ****ing around. I got a stack of 53 amplifiers that need a modification, go ahead and drag your feet. Take some more tools away, I don't give a ****. I used to but now I will sit on the head, do my nails or who ****ing knows.

I said what I said, check the low voltage supplies first. Not having a trace can be caused by 100 different things, not just lack of HV.