Valve Wizard

The Valve Wizard is the personal website and brand of Merlin Blencowe, a UK-based electronics engineer and valve/vacuum-tube circuit designer. The site provides free tutorials, schematics, and PCB Gerber files focused on designing valve guitar amplifiers, bridging the gap between introductory and advanced tube-amp theory. Blencowe has also authored several well-regarded books on the subject, including 'Designing Valve Preamps for Guitar and Bass' and 'Designing Valve Guitar Amplifiers', and offers valve amp repair services in Burnley, Lancashire.