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Yefim Fedotov
Yefim Fedotov

How to Use the Kenpro KR-450XL Aerial Rotator

How to Use the Kenpro KR-450XL Aerial Rotator

The Kenpro KR-450XL is a horizontal rotator that can rotate a directional antenna up to 360 degrees. It is designed for amateur radio enthusiasts who want to communicate with distant stations using different frequencies and polarizations. The rotator consists of a motor unit that is mounted on the mast and a control unit that is placed inside the shack. The control unit has a dial that shows the direction of the antenna and a knob that controls the rotation speed. The rotator can also be controlled by a computer using an optional interface cable.

kenpro kr - 450 xl manual

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In this article, we will explain how to install, operate and maintain the Kenpro KR-450XL aerial rotator. We will also provide some troubleshooting tips in case you encounter any problems with the device. Please read this manual carefully before using the rotator and keep it for future reference.


To install the Kenpro KR-450XL aerial rotator, you will need the following tools and materials:

  • A mast that can support the weight and wind load of the antenna and the rotator

  • A mounting bracket that fits the mast diameter

  • Four U-bolts and nuts to secure the bracket to the mast

  • A compass to align the rotator with the north direction

  • A level to check the horizontal alignment of the rotator

  • A wrench to tighten the nuts and bolts

  • A screwdriver to connect the wires

  • A coaxial cable to connect the antenna to the transceiver

  • A six-wire cable to connect the motor unit to the control unit

  • An optional interface cable to connect the control unit to a computer

Follow these steps to install the rotator:

  • Choose a suitable location for the mast that has a clear view of the sky and is away from power lines, trees and other obstacles.

  • Erect the mast securely and attach the mounting bracket to it using the U-bolts and nuts. Make sure the bracket is level and tight.

  • Place the motor unit on top of the bracket and align it with the north direction using a compass. You can also use a landmark or a map as a reference. Tighten the bolts on the motor unit to secure it to the bracket.

  • Attach the antenna to the motor unit using the supplied hardware. Make sure the antenna is balanced and does not exceed the maximum weight and wind load specifications of the rotator.

  • Connect one end of the coaxial cable to the antenna and run it down along the mast. Connect the other end to your transceiver or an antenna switch.

Connect one end of the six-wire cable to the motor unit and run it down along

the mast. Connect

the other end


the control unit. Make sure

the wires are matched correctly according


the color code on

  • the terminals.

If you want



the rotator by

a computer, connect

the optional interface cable between

the control unit and

the computer. Install

the software driver for

the interface cable on

  • your computer.


the power cord of

the control unit into

a wall outlet. Turn on

the power switch on

the back of

  • the control unit.



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