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General Information
The DX Engineering rotator is designed to rotate large tower mounted amateur and professional antenna
arrays under control from the station operating position.
The internal motor is variable DC coupled to a series of hardened gears to provide the turning power. A
magnetic pulse sensor sends the appropriate information to the rotator controller to indicate speed and
positioning. There are no starting capacitors, limit switches or positioning potentiometers that are normally
prone to failure in the DX Engineering rotator.
In the event of a nearby lighting strike, the pulse sensor may be damaged. Unlike other rotators, the DX
Engineering pulse sensor can be easily replaced by opening the pulse sensor assembly access panel without
having to remove the rotator from the tower.
The DX Engineering rotator is designed to fit Rohn 25, 45, 55 and
other large towers as well.
Note: Recommended for Rohn 45G and larger towers. This
rotator may overload a Rohn 25G tower.
The rotator should be mounted approximately 10 feet inside from
the top of the tower with an optional thrust bearing (DXE-TB-300
or DXE-TB-400) mounted on a thrust bearing shelf – or flat tower
top.
The rotator mounting shelf must be installed so it is level and
centered to the tower which will then be in-line with the rotator to
eliminate any undue stress. The Rotator is attached to the Rotator
Shelf using four single-use patch bolts for secure mounting.
An optional Mast Clamp (DXE-RTMC-2 or DXE-RTMC-3) is
required to be mounted to the rotator top plate using four bolts
with single-use Nyloc hex nuts and flat washers.
An Important Note About Rotator Capacity – Antenna Wind
Area, expressed in square feet or square meters, is a specification that applies for tower loading, but it does
not properly equate to rotator specifications. The appropriate specification for rotators is Rotational Torque.
Antenna system size, boom and element lengths, antenna balance, as well as total antenna and mast weight,
must all be considered to determine torque requirements. Total antenna wind area handling of the DX
Engineering RT4500HD may be expected to be greater than 35-40 sq. ft. for very well-balanced antenna
systems, while also using the appropriate torque calculations that account for total antenna system size and
weight.
PLEASE
– Read the entire manual before starting installation to get familiar with the procedure and to
ensure you have the required tools and supplies needed for a successful and Safe installation.
