The ATU4K is a remotely mounted, stepper motor controlled, broadcast quality, symmetric L-Network antenna tuner that is built for the most challenging antenna systems. This unit is designed to be mounted outside of the shack in a location that works best for the antenna system. This arrangement allows the user to run 50 ohm coax into the shack, while also taking advantage of the essentially lossless characteristics of open wire line systems.

The ATU4K is controlled through a remote console located in the shack called the Stepper Tune. This control unit drives a set of stepper motors in the ATU4K to affect tuning of the antenna system. The Stepper Tune is completely configurable and can memorize hundreds of different band settings. This allows for quick and accurate band switching from the comfort of your shack.

The ATU4K was developed as a joint effort between www.trueladderline.com and Blue Ridge Amateur Radio. The Stepper Tune controller is provided by Gary Baker (K7EMF) of TrueLadderline.com. The ATU4K and Stepper Tune controller may be purchased directly on the TrueLadderLine.com web site.