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Until I restored my CTC-7, I would have considered older "maroon drops" as good as new orange drops, but I couldn't get the sweep sections working right until they were all replaced. Based on that, I am now suspect of all older drop-type caps (I have seen some green and blue ones, too).
The failure mode may be something a little different than for paper caps. In these cases, I consider the TV the best "cap tester" in the world. It's possible that your set would work acceptably with the sort-of old maroon guys in place. I don't see any downside to seeing how it works with them in place, and later deciding whether to replace. On the other hand, you have it on the workbench now, and the maroon drops are not original components, so replacing the replacements is not destroying anything of great historical value.
It sounds like you're taking a methodical approach, which is great. I'm an impatient guy, always eager to see results on the screen. When working on my CT-100, I told myself it might be the last one I would ever lay hands on, so I tried to relax and enjoy the process.
Phil Nelson
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