Champ Electronics

Practical Tone Control Circuits

Fun With Tubes

Black Magic Amplifiers

Guitar Amp Books for Professional Builders

The National Valve Museum

Aiken Amps Tech Info

Valve Wizard

Tube Amplifier Debugging Page

Tube Amp FAQ

Atomium Amps / Electronic States

Navy NEETS Electronic Training Program

Tube Books PDF Archive

Amp Repair Parts schematic archive

Planet of the Amps

ESP – Professional Results for the Do-It-Yourself Enthusiast

EEV Blog (Electronics Engineering Video Blog)

All About Circuits

Weber Bias Calculator

Schematics Unlimited

Schematic Heaven

The Blue Guitar Schematics Page

The Signal Path Blog


El Paso Tube Amps

Music Electronics Forum



Tube Town – Bias Setup

Dating Vintage Guitars and Amps by Source-Date Code

The Art of Electronics, Paul Horowitz and Winfield Hill

The Electric Guitar Amplifier Handbook, Jack Darr

Solid State Guitar Amplifiers, Teemu Kyttala

The Circuit Designer’s Companion, Tim Williams

RCA Receiving Tube Manual #17

Radiotron Designers Handbook #3

Inside the Vacuum Tube, John F. Rider

Electronics for Guitarists, Denton J. Dailey

Electron-Tube Circuits, Samuel Seely

Theory and Application of Electron Tubes, Herbert J. Reich

Basic Theory and Application of Electron Tubes, The Departments of The Army and The Air Force, February 1952