Found another old amp at a yard sale today. Harmony, solid state, 12” speaker, model 7022W. Cheaply made, maybe from the early 70s, but for a buck, why not? Just plugged it in and turned it on. Figured it wasn’t the best idea but eh. To my surprise it turned on. Hooked up a guitar... played for a hot second, made a distressed sound, and turned off. I figure the filter caps are bad, but did I do any major damage just now? Not too concerned since I only spent a buck on it and it’s not valuable, but I wanted to tinker.