Capehart 325 restoration

[robert1]

Originally Posted by bandersen

All the resistors and capacitors on the HOT have been replaced and DC voltages seem reasonable. The cathode waveform matches whats shown in the service info.

how about the voltage on the cathode of the damper tube? it should be around 550 V. if not, the low end of the winding on the flyback most likely has shorted turns.

Originally Posted by bandersen

I've also tried swapping out each of the the three tubes inside the HV cage, but the low HV issue remains. Only about 6.5 kV under load. Just for the heck of it I installed a full size CRT, and you can see how dim and unfocused it is.
So it seems to me that leaves the two high voltage ceramic caps inside the cage, the yoke and the flyback as culprits

i would say that the flyback has a few shorted turns. have you done a "ring" test on the flyback transformer yet?. that can be more revealing than a ohmeter can be.