My bud and his dad have had a Twin Reverb, among other cool things, sit in their music room and I'd like to get it working for them. They actually play out from time time instead of nerding out on gut shots and TDPRI Here's why it sat. Before I took it they showed me how it played quiet, sounded good, but a Twin should raise hair, no? Also, after about 10 mins a high frequency squeal comes in. I have opened it up to see if there was anything obvious that was out of whack. I don't see any bad solder joints. Everything that should be grounded is grounded. Tubes are good and sockets were cleaned. I don't think anyone has been in the chassis before. Okay so now I'd like to replace the electrolytics. If it was my amp I would only swap whatever is broken but if I do that here and something else goes out I am afraid the amp would sit in the music room again. Here is my question. The values on the filter caps do not all match what's on the schematic I found online. Would you replace them with the same values or go by the schematic? I know that some values are now more common in a few digits away but a 220mf vs a 100? Was Fender just subbing with that they had on hand? I'm including a photo. Looks like three eras in the cap house! I'll include a shot of the inside too while I'm at it. If you've made it this far I thank you!