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ok here is where we are, just got off phone with Timmy..
HV is holding at about 23-25kv with scene changes. I think it should be better but at least its not down to 19kv.
Max HV with brightness down is about 28kv min is about 22kv.
gray scale procedure does not seem to work, that is service switch to setup, bias at min and try to get all three to just make a line.
Gray scale was eventually set by eyeballing a raster for overall grey/white tint.
did not get too into setting low lights and high lights with screen pots and drive pots.
interesting thing was with just a raster the kv held right at 25kv while adjusting the brightness pot from full dark to full bright, so the regulator took care of that, but seemed to jump around with reg programming.
I am tired, don't know how Timmy can hang with it but I did make a couple things to check
swap the shunt tube from one set to the other (the shunt he was using was from yet another set). He has two silvertones so I suggested comparing the shunt performance side by side.
check the bias pot (it seemed hypercritical, just moving off min would bloom and kill all HV) wanted him to use an analog to judge how smooth it is, only has digital, is suggested at least to confirm the resistive element had not opened at the far side (and the wiper was making the element complete in one sweet spot only).
check the Sam L14 transformer for continuity 7 ohms one side 12 the other.
The setup (using the switch) acted very odd while he was doing it on the phone. Did not work right at all. This bothers me.
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