I used to own a Silvertone that's similar to this one. I always wanted to know how it all worked. I went to electronics tech school. After several years and working on many guitar amps, I came across a Silvertone like this one that needed repairs. One look inside and I thought 'oh crap, what a mess'. I was just a little surprised at how disorganized and messy it was compared to typical point to point amps from Fender and Harmony. Still easy to fix except for their reverb system.