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2 Meter, 6 Element Cross Yagi Antenna

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2 Meter, 6 Element Cross Yagi Antenna

Please make sure you read my Disclaimer and that you fully understand it.

Before we start, I take no credit for this antenna design. I found this excellent YouTube video with great attention to detail online.

Check out this link below of the antenna design with hints and tips to build this antenna project.

Antenna Cross Yagi

There is the full explaination on how this antenna was made on the above youtube link by Viorel Racoviteanu. I have also included the links below, he included in the video with tips and infomation to help making this antenna.

One comment I would make is on the driven elements, I used 10mm tubing for the dipole and the elements on my version of the VHF antenna.
After making one of these antenna's, the holes for the driven elements does not need to be 10mm.
If you use 10mm tubing then, use a 10mm drill for the elements. For the driven element, use the size drill to suit the dowel, but I drilled it to 10mm but as the dipole elements do not go through the boom like all the other elements, the holes need only to be the size of the dowel, still with 11mm apart spacing. I had an issue when I came to assemble mine.
The thickness of the inside wall diameter of the tubing was 7mm but I could only find 6mm dowel. This was too thin and once drilled it did not have enough strength and snapped. I ended up drilling the inside of the tubing wall to fit a larger size dowel, I drilled 3cm in on each side, just enough to fit the 8mm dowel I found.
If you have access to a lathe, then I would suggest that you could still drill out the holes, 8mm, the same size as Viorel's design specifications, but if you are using 10mm tubing the to use either a 10mm fibreglass rod, wooden dowel or a plastic knitting needle and turn down each end, so it will fit into the tubing and be the same diameter as the tubing.
I might look at this option later.
As I have already pre drilled the UHF version, I will do the same again as the VHF. On the UHF version, I used 10mm tube for the dipole, but used 6mm rod for all the elements. If I was to do it again I would use 10mm tubing for everything. I found it very hard to squash the 6mm tube to hold it in place on the boom.

Photo 1 shows the picture of the finished VHF antenna by Viorel Racoviteanu.

In photo 2, it shows the lengths required for the VHF phasing and explains about phasing of the two antennas in more detail. (See Link 2.)

Photo 3 shows the VHF 6 element drawing and lengths of each element and spacing on the boom for the 2 meter version.

Photo 4 shows the UHF phasing network and lengths required for phasing the two antennas together.

Photo 5 shows the UHF 12 element drawing and lengths of each element and spacing on the boom to make the UHF version of the Cross Yagi Antenna. Simply apply the same methods as the VHF version in the video and links.

Useful links:

Notes on 6-Element Wide-Band 2-Meter Yagis by L.B. Cebik, W4RNL (SK) (See Link 1.)

Link 1.

Antenna Circular Polarization by Mak SV1BSX (See Link 2.)

Link 2.

Yagi Uda Antenna Calculator by www.changpuak.ch based on Rothammel/DL6WU) (See Link 3.)

Link 3.

Coaxial Power Split Calculator by www.changpuak.ch (See Link 4.)

Link 4.

Calculate the extra length of coax feeding the other dipole for circular polarisation by Hartmut DG7YBN/xpol Yagis (See Link 5.)

Link 5.

This shows Viorel's Website with more infomation on things done differently than in the video. (See Link 6)

Link 6.

I hope you enjoy building this project like I have and thanks to all involved for there hard word. Great projects like this is what makes Amateur Radio all about. Enjoy Satellite communication.