Quote:
Originally Posted by Electronic M
You're forgetting mica capacitors. Micas usually are fine in RF/IF stages but have a high failure rate in sweep circuits especially in pre-1960 sets.
Your ordering is close to accurate as a ranking of worst to best.
Oil caps vary depending on country (US and european are good, some Japanese oil filled caps are good and others are terrible).
All types can fail, and I've probably seen at least one bad cap of each type, even orange drops.
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Those ones in the late 60's early 70's Sanyo portables are horrible. I think the were Elna brand (Grey heat shrink label and look like electrolytics). Whatever they are they are all as leaky as wax paper from the 50's.
I was given a bunch of Pyramids with a yellow rubber cover on them and out of 50 or so I've tested they all checked out good.
Also to add to the list of lousy capacitors are these plastic cased electrolyitics.
