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I have found that a sets age and how long it has gone in dormancy dictate the need for full recap jobs. To be specific, my oldest set is a 1947 model, an RCA. I have a 1950 RCA as well and both sets required complete recaps; no way around it. However, many later 50s and almost all 60s sets will do fine with the original electrolytics. Just get rid of everything else non polarized except ceramic discs.
Funny how as much as this topic comes up and we talk about "full" recaps, I venture to say that most of us don't go through the ceramic discs, so really it's not a full restoration. Not saying it is wrong, because they have proven to be ultra reliable and it would be a waste of time and money to swap them out for what these days may just end up being an inferior part. Like the old TVs and radios, they just don't make them with the quality that they used to in many cases.
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