AutoCap Tuner for mag loop Antennas - Resource Detail - The DXZone.com
Mag Loop
Arduino Magnetic Loop Antenna Controller - Hackster.io
The Automatic Magnetic Loop Tuner – Golb.be – ON5IA
GitHub - WA2FZW/A-40-Meter-Magnetic-Loop-With-Semi-Automatic-tuning-by-WA2FZW: This project describes the construction of a homebrew 2-turn 40 meter magnetic loop antenna and the semi-automatic remote tuner for it.