How Tube Amps Work

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This is the place to start!  

Rob's site has a wealth of information concerning how tube amps work, and ways to improve or modify your amp. 

Guitar amp design books for Professional Builders.

Amplifier Calculators

Tutorials and Classic Circuits.

Your go-to knowledge base for Fender amp models, schematics, and era documentation.

 Merlin Blencowe has written several books on tube amplifier design.  He analyzes various circuits, and provides his own valuable insight towards what works, why it works (or doesn't), and how it works.  Knowledge of how amps work is a good prerequisite.

Here are hundreds of original Fender schematics and layout diagrams, available for free viewing and download, in PDF format.  Perhaps the most complete, highest resolution collection of vintage Fender schematics available on the web. 

 Do you have a Marshall Guitar or bass tube amp that needs repair or modifications? Here you will find our collection of Marshall schematics. All of these PDF files are available for free download.