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I have been designing music technology circuits from 1984.Also running a business producing theremins and Colorsound pedals starting 1996. I have done part-time lecturing in electronics since 1989.


Over 150 articles on audio engineering circuit design, loudspeakers, analogue processing and musical instruments. I write a monthly column called Audio Out for EPE magazine. Co-authored Electronics Teach-In 07, with special chapters on volume controls, vinyl playback and power-amp design.


Institute of Physics


Current work includes circuit design for Theremin Bollards, currently exhibiting at the Science Museum London. Also the new Stylophone Gen-X for Dubreq Ltd. I have also designed many Colorsound guitar pedals for Macari’s.


Capacitor induced distortion and the elimination of unreliable wet electrolytic capacitors in audio circuits. History of amplifier and loudspeaker development.

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