|
Plastic-coated 1950s caps such as bumblebees, etc., are simply paper caps in plastic shells, so they are generally unreliable.
For the record, you can't really judge the condition of a wax paper cap by its appearance. It may look drippy but still test OK, or look fine on the outside but be junk on the inside. That's why I replace 'em all, along with plastic-coated bumblebees, Micamold papers, etc.
I would not rely on original electrolytics, even if you think they have reformed. My experience is that a reformed 50-year old electrolytic will not be reliable for the long haul.
If you wait for one of the electrolytics to fail, then you may burn up an "unobtanium" power transformer. Been there, done that. You could pay more for a replacement than you spent on the TV.
If it were my TV, I'd replace the electrolytics and carefully clean and inspect that entire area where you found the carbon trail. Denatured alcohol is good for cleaning away the soot & grime in a H-V area. H-V can do funny things like tunneling through a phenolic wafer, which may not be obvious if the whole area is dirty.
Next, I'd do some voltage checks to get an idea of the basic health of the power supply, and move on to other specifics from there.
My little tube substitution handbook says that you can't replace a 6DQ6 with a 6BQ6 (although you can go the other way). The TV sages probably know more about that issue.
Good luck with the project. Setchell Carlson is a good manufacturer, from what I understand.
Phil Nelson
|