Well there is another funny story here that I am some what loathe to tell. Last night I had disconnected the analog amp meter and put my multimeter in the circuit to get better data. After I had done the plotting for the reinstalled old supply I was cleaning things up and disconnected the multimeter. Did some other things and then went to run a laser job and “sparky 
sparky” in the LPS. I had forgot to hook the analog amp meter back into the circuit. So it was trying to run… with no cathode. 
I think I fried the HVT. See, Ha Ha funny. 
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But hey, fresh day and all. 
New LPS reinstalled with proper switching and based on the analog meter it’s performing much better.
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I was reading down through the adventure and pulled out the schematic looking for a reason the supply would saturate.
Then I read the last few posts and said to myself: Self; “you should have known better and had Ned check the voltage setting”.
Two good things you gave us:
- We now know what the LPS output current curve looks like when the voltage setting is set wrong.
- We now know to ensure that the input voltage is checked by measuring L to N. Still a mystery to me?
Still, be interested to know what the two graphs look like when everything is working.
Does the old supply top out at 15V now vs 19V??
I just didn’t try going higher on the old supply. Thanks for helping me feel better. Of course that’s part of why I keep posting my mistakes, so other can learn from them. I’ll try to get a good plot on the new supply with proper switching later.
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