A classic topology since the tube era.

Gainclone amp, a clone of the famous Gaincard. A complete power except for the mains transformer.

A power supply board based on the famous super regulator topology.

Various designs of the famous super regulator.

A current feedback headphone amplifier using discrete SMD components.

My first Altium Designer project. The was a design made with input from diyaudio.com

This pcb was designed as a both positive and negative super regulator. Notice the quality of the hand soldering. This was easy when the solder contained lead. Nowadays leadfree solder is used.

This board was handmade in the 80's using black tape. It worked very good and was many years later made as a real pcb with two channels.