First fiddling with the concept...

A project log for Franken'plifier

Server PSU PFC stage + class D frontend + grid drive Xformers + valve push/pull + toroïd Xformer = audio fun

ShradShrad 03/24/2016 at 16:100 Comments

Just received today a PAM8403 based 3W class D filterless amplifier which works at 200~300kHz

A crude test with audio in, 5VSB transformer at output gave a swing of 240V at the oscilloscope... looks promising

I'll have to set up a small valve amp SE stage to proof the project viability, and check optimization at the PAM8403 output stage :)