ATU-100 Antenna Tuner

Antenna Tuner, designed by N7DDC, 1.8-50MHz, up to 100 Watts. Bought for 97€ in 12/2021.

OLED display and tune button

Power switch, power supply connector, antenna and TX input connector

15 relais…

The PIC16F1938 microcontroller


ATU-100 mini User Manual

ATU-100 Extended Board User Manual

Large thread on (german) -

ATU-100 mini original thread (russian)