Hey, new member. I've been learning about electronics for a while with no clear understanding about what the components in a circuit are doing. Been working on an old Traynor pa amp, trying to figure out why there is a loud buzz coming through. I found the problem, but not before frying some components. After testing each component in the circuit, i got really frustrated in not knowing what that transistor is doing, and the other three. Along with every other component in the circuit. Long story short, is there a book, web site, or on this site that explains in detail what each component is doing in a circuit. Appreciate all the info i can get. Thanks for now.