Silicon Chip Jan 2024, page 92 has an article on restoring the Quad 303 and companion Quad 33 control unit. Unfortunately the web site does not give much information, but the article was justification enough to buy a copy.
While reading about the restoration it triggered memories of my attempt to build an amp inspired by the Quad design: Pratical Electronics - Gemini. I only built the power amp as it was too hard to get the parts for the preamp in Australia. Three and six (actually more like $1 AU) was a lot of money for a young lad back then
The Gemini was a pretty good design, I never got it to work; too inexperienced. I did have a crack at building the ETI mosfet amps a few years later. That worked, just do not look too closely at my workmanship.
While reading about the restoration it triggered memories of my attempt to build an amp inspired by the Quad design: Pratical Electronics - Gemini. I only built the power amp as it was too hard to get the parts for the preamp in Australia. Three and six (actually more like $1 AU) was a lot of money for a young lad back then
The Gemini was a pretty good design, I never got it to work; too inexperienced. I did have a crack at building the ETI mosfet amps a few years later. That worked, just do not look too closely at my workmanship.