Re: Care of Rare Valves
I wouldn't be surprised if at least some of the skewed/offset looking innards found in older valves without the mica bracing etc. were due to impact/dropping- the "right" sort of impact might not break the envelope but result in supports being noticeably bent. Every now and then, there's a tale here of an unfortunate 'scope that's been subjected to courier GBH and produces a peculiar trace as a result with long and precisely aligned electrode assembly being distorted, but without envelope damage.
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