Disclaimer: this is not an attempt to debate the merits of any particular components' brand, age, value, manufacturing methods, etc. Greetings! What I have are a selection of capacitors salvaged from various sources which appear to be in good condition. (Bumblebees, orange drops, etc.) When tested via ESR meter, the capacitance values are within spec, at least according to how the caps themselves are labeled. (Full disclosure: it is a cheap ESR meter, far from pro workbench quality, but good enough nonetheless.) What I don't understand is how to make sense of the effective series resistance or voltage loss readings. Is less better? What is an acceptable range? Does it even matter, as long as it doesn't indicate an open or short circuit? I haven't found much if any technical info pertaining to actual tests, with the exception of electrolytics. And it seems like a good idea to validate the electromechanical what-have-you before getting into trying out & auditioning these "vintage" (ok, OLD) caps. Thanks!