Dave,
The HV meter I used for the -2KV cathode measurement has a 40KV full range, so very possible I didn't see the -2KV move the needle. I'll have to see which type of preregulator it has. I noticed the possibility of either in the service manual.
I'll take a look at the DC restorer in a dark room to see if anything is arcing or glowing. Thanks for the tips.
