https://www.pacificrecone.com/JackDarrBook.html Jack Darr Book: Electric Guitar Amplifier Handbook This book, now long out of print, is still considered a solid reference on the care and feeding of guitar amps. ( Click on the Subject matter for the PDF file - you need Acrobat Reader for this...) SECTION I - How Guitar Amplifiers Work Chapter 1 - Amplifying The Signal Chapter 2 - Special Signal Circuits Chapter 3 - The Power Supply SECTION II - Service Procedures and Techniques Chapter 4 - The Amplifier Signal Circuits Chapter 5 - The Power Supply Chapter 6 - Output Stage, Transformers and Speakers Chapter 7 - Cables and Pickups Chapter 8 - Customer Complaints
