>When I took the cover off, it appears one of the 8874's is much darker than
>the other. This might be nothing, as I have had various 8874's from different
>sources over the years, but >thought I'd mention it in case it means something
IIRC, the metal on those tubes is silver plated. Silver tarnishes . Typically
silver sulfide (Ag2S - I have no idea where the sulfur comes from) and/or
silver oxide (Ag2O), both of which are dark brown to black in color. Means
nothing, assuming that it is tarnish.
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