Open-source boards designed in KiCad by TuchAudio on GitHub, from 4 repositories. A board’s address here is its repository’s there.
TuchAudio/ta101b
Discrete Phono preamp
TuchAudio/ta103
Discrete, simple op-amp phono preamp
TuchAudio/ta191
Low Noise, improved Moving-Coil Phono Pre-Amp
TuchAudio/ta502cd
Two-channel stereo mixer, switched