so I'm looking at this McIntosh C28 pre-amp for a buddy, I check the filter caps, and some of them are reading way high. For instance, one's got 3 sections: 50/200, 2,000/20 and 2,000/25. The 50 is completely dead, but each of the 2,000's are reading nearly 3,000 uF. Their ESR is really good, so I'm inclined to leave them there, but I can't recall ever seeing electrolytic filter caps drift up that much from nominal value. I checked another one (this one's a GE), and they're high as well, though not by as much; the worst section on that one is a 50 uF that reads at 120 uF. so, do I leave 'em in? with the first one, I could scab in a 50 uF on the existing terminals and call it a day (I think I've got room for that), but I figured I'd run it by y'all and see if there's any good reason not to. ESR on all of them (except the dead one) is really good, so I'm thinking they're ok. These things are a real pain to find, especially in those values, I don't wanna try to replace them if I don't really have to. The pre-amp works fine, for what it's worth, the guy just said it sounded like it had some bad connections, so I'll definitely clean the pots/switches/etc., but while it's here, I figured I'd go the extra mile.