Kaneda 30w A class PSU Do It Yourself Kit. Kit do not include big capacitors and pcb transformer
30W / 8 ohm version is obtained by replacing the 2 x 15V / 10VA and 2 x 12V / 120VA transformers with 2 x 18V / 10VA and 2 x 18V / 160VA. You just have to tweak the settings a bit. The sound quality remains the same.
pcb is FR4 1.6mm 2oz Green HASL