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Old 06-27-2019, 06:48 PM
trinescope trinescope is offline
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Join Date: Jun 2005
Location: Arlington, TX
Posts: 163
I got a HV probe so I could trouble shoot the low HV. One of the doorknob capacitors is bad (measured about 1MEG resistance leakage, no good). When I pulled the plate cap on the second 3A3 the HV went from 6kV to 14kV. Repairing this should get the HV where it needs to be. Also during testing the focus control started smoking and got destroyed. I found out I have the dreaded vertical convergence transformer problem which caused the focus control to burn out. So I have three things to take care of before I can move much further.

I'm going to experiment with graphite and epoxy and see if I can repair the focus control. It looks like it's going to take quite a few attempts before I can get something I can use to replace the resistance track. Next I will see if any more reproduction convergence transformers are available. The doorknob capacitor is a bit expensive but available, so no problem there.
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Erich Loepke
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