Projects - Printed circuit boards and audio electronics modules

I've been building bits of audio (and other) electronics from personal interest for many years. Recently I've been asked to formalise some items or designs and make them available for other enthusiasts to buy.

As I get these ready these, they will be listed below:

K1450 RIAA Phono preamp PCB - Circuit board for the classic John Linsley-Hood RIAA Phono preamp

15-0-15V Power supply circuit board - A suitable power supply PCB for the above preamps

 Microphone mods & upgrade PCBs - Microphone electronics designs