Our new 2m EME Antenna System has been performing very well. One area that we noticed that could use improvement was the alignment of our antennas as we move them in the Elevation plane. We’ve added some custom enhancements to our EME H-Frame to address this problem…

Source: EME Station 2.0 Part 13 – H-Frame Enhancements

EME H-Frame – The Problem

Any antenna system that involves large, multiple yagi antennas is bound to need some tweaking to work at its peak potential and to be mechanically reliable. Our recently constructed EME antenna system is no exception. We added some elements to properly balance our EME H-Frame assembly when we put it up.

We found that the antenna tended to change their alignment when we rotated them in the elevation plane. A solution to reduce some of the stress on the fiberglass components in our H-frame was also needed.

The Solution

The solution to these problems was a Custom Truss System that we worked with Matt at XX-Towers and Robert at M2 Antenna Systems to create. We built the new Trusses using non-conductive Phillystran cable and Turnbuckles. The parts were carefully arranged to keep all of the metal components that were added at the center of our antenna array to prevent any impact on the system’s antenna patterns.

We had a 50-foot Boom lift at our QTH recently to enable some upgrades to our Satellite Antennas. We made good use of it to install our EME H-Frame enhancements as well.

This part of our EME Project is a good example solution for some of the typical mechanical problems one encounters when building a large antenna system.

You can see and read more about what we did via the link above.

Fred, AB1OC