Why and How to Replace Your Amplifier's Output Transformer - Premier Guitar
Transformers for Tube Amplifiers: HOW TO DESIGN, CONSTRUCT & USE POWER, OUTPUT & INTERSTAGE TRANSFORMERS AND CHOKES IN AUDIOPHILE AND GUITAR TUBE AMPLIFIERS: Popovich, Igor S.: 9780980622386: Amazon.com: Books
How to Layout and Build a Guitar Amplifier Chassis