
Ground Loops
Updated with new material 7th January 2019 This set of c. 50 slides is the culmination of my experience over a period of about 25 years building numerous power amplifiers and preamplifiers. I first started out in audio around 1975…

Simple Ripple Eater PSU for the sx and kx-Amplifiers
The latest PCB’s are gold plated, through hole plated and silk screened for just $11.99 (excl. shipping) and are available from Jim’s Audio here: Ripple Eater PSU for kx and sx Amplifiers Here is an Excel file with the…

Hifisonix kx-Amplifier
The Hifisonix kx-Amplifier is a 28 Watt class A DIY Current Feedback (CFA) power amplifier featuring low distortion, wide bandwidth and fast rise/fall times. It can be operated either in pure class A mode, or in class AAB mode with…

Very Simple, Accurate RIAA Phono EQ Amp
Very High Quality Silk Screened PCB’s for this project are available from Jim’s Audio here:- Hifisonix RIAA Amplifier Here is a simple no-nonsense, accurate RIAA equalizer amp you can easily build. The design uses an all-active topology and is based…