Designing Valve Preamps for Guitar and Bass, Second Edition
Designing Power Supplies for Valve Amplifiers, Second Edition
Dave Funk’s Tube Amp Workbook: Complete Guide to Vintage Tube Amplifiers Volume 1 – Fender
Rob Robinette’s Tube Amplifier Website
Class A Exposed and Explained by Randall Smith – What is Class A and how does it differ from Class AB?
The Complete Guide to Potentiometers – By Jeff Smoot
Choke Filter – Electronics Coach