Re: Crumbly RS capacitors.
As a slight aside, similar-looking large grey coupling caps appear in 1950s Pamphonic amplifiers proudly carrying the Pamphonic brand! I wonder why they bothered. They did that with their speakers as well.
However, my tests on all those "Pamphonic" grey caps in that amp (a 1958 Model 3001) while doing restoration proved that they are all still perfect. No leakage or cracking.
That's more than I can say for those horrid orange electrolytics, every one of which had to be replaced (over 20 in all)!
-Jeremy
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