The ATU2KD is a differential T-network tuner designed for outdoor use. The tuner comes in a weather proof case that can be mounted on the bottom of a tower or anywhere near your antenna.

The tuner supports both coaxial output and balanced line output. The balanced line output uses a Balun Designs 1:4 Voltage Transformer designed for 450 and 600 ohm transmission lines. The tuner uses a standard PL-259 coaxial connector for the input.

The tuner utilizes a StepperTune-BT (TrueLadderLine.com) control interface, that is located in the hamshack. A cat-5 cable runs between the control interface and the tuner.

The tuner uses a Blue Ridge Amateur Radio roller inductor and (currently) a commercial differential capacitor. The unit also features 2 stepper motors, drive belts, sprockets and the weather proof case.