QRV-01 - The extreme headphone amplifier Click on the picture to get a larger view. I designed this amplifier 1986 and I felt like publishing it now. The excellent MOSFETs from Supertex Inc are hard t...

QRP-02 - The first SMD Gainclone amplifier in the world(?) Click on the picture to get a larger view. The world's first DIY SMD Gainclone Specifications for the new advanced Gainclone. 50 um pcb with...

Gainclone - The most popular amplifier in the world(?) A LM3886 from National Semiconductor. The heart of a Gainclone . It took a while to understand what "GC" was, or Gainclone . What a name! A coupl...