1 Paddywagon 3 years ago Hi Billy,You were kind enough to recommend a signal tracer in my organ repair thread. Can you (or somebody here) recommend some sort of book or study manual that I could learn some basic electronics? I think it would be nice to know something about tube amps and circuitry and caps and resisitors and the like - I would like to learn the basics so maybe I could in fact know how to use a signal tracer and repair organ amps or Wurly electric pianos in the future. I appreciate any advice! Thank you.