Magnetic loop antenna for receiving HAM radio bands with the following features:

• control over WiFi from web browser
• automatic antenna tune on frequency change in rtl_tcp source

Designed using FreeCAD, STL files for printing can be found in stl directory.

Assembly details are written in Russian in blog post. Use Google translate if needed.

Simple python script to adjust antenna controller settings to match frequency change in rtl_tcp backend.

sudo apt-get update
sudo apt-get install -y rtl-sdr

sudo mkdir /opt/magloop
sudo useradd -r -d /opt/magloop -s /usr/sbin/nologin -G plugdev magloop
sudo install -o root -m 644 magloop-tuner.py /opt/magloop/
sudo install -o root -m 644 magloop-tuner.service /etc/systemd/system/
sudo systemctl daemon-reload
sudo systemctl enable --now magloop-tuner.service

Antenna can be manually managed from web browser over Wifi or by push buttons at controller board.

• execute position calibration routine
• set absolute position
• set increase/decrease relative position with different increments