Hardrock-50 Automatic Antenna Tuner Resource Page
Welcome HR50 ATU Builders!
The Hardrock-50 Antenna Tuning Unit is a wide-range ATU that fit's inside the Hardrock-50 and Hardrock-50+ power amplifiers.
This page is where we will host all of the things you need to build the internal ATU for the Hardrock-50 Amplifier.
Look on the Files page for the assembly manual, schematic, firmware for the ATU.
The ATU now includes wound toroids already installed on the PCB.
Get ready to build...