[morzh]

Today took one last shot at baking the Candohm.
Baked it at 250F for 4hrs.

It is interesting, the leakage resistance decreased from a few MOhms to 250kOhm but this holds steady. When in-circuit, the hum is still very low, and the voltage now is about 8V.
But every minute or so there's a pop (not loud, but audible) and the voltage jumps to 30-40V a d quickly returns to 8V.
Probably a breakdown.

So.....the rebuilding is still the best option, but need to build the base, or else to use the Candohm for which it needs to be gutted.

PS. Gutted it. Was trying to extract the resistor intact, but broke the 86 Ohm piece off. The two 970 ohm sections are fine. Could be re-used actually.
The old fishpaper was crumbling; no wonder it leaked.
I can actually re-wrap it in the new fishpaper, though I'm not sure what temperature it would withstand.