Amplifier Resources:

Mercury Magnetics

Vacuum Tubes

Bob's Transistor Museum

Schematic Heaven

Hoffman Amplifiers

Chris and Justin Radio

Dr.Tube

Duncan's Amp Pages

The Blue Guitar

AX84

Broadway Music Company-Kustom

The Fender Amp Field Guide

G

Tube Manufacturers:

GrooveTubes

JJ Electronic

SED

New Sensor / Sovtek

Svetlana

Ei-RC

Changsha Shuguang Electron

Amplifier Manufacturers:

Ampeg

Crate

Fender

SWR

Sunn

Marshall

Vox

Peavey

Trace Elliot

David Eden

Kustom

Mesa Boogie

Orange

Hiwatt

Matchless

Randall

Line 6

 

Synthesizer / Keyboard Manufacturers:

Roland

Korg

Alesis

Moog

Ensoniq / E-Mu

Yamaha

Kurzweil

 

Synthesizer / Keyboard Resources:

Rhodes

Sonic State

Synth Zone

Synth Museum

Synth Fool

 

Ralph Isaacson Electronic Musical Instrument Repair and Design Version 2.4.8