Rotator cage

[A71CV]

Hello OMs
I am post this thread of homemade rotator cage for my Yaesu rotator G800SA. What is special in this project is that the cage could be open into pieces and Installation it again and you can adjust the high you want.
Here is the diagram show the figures and measurements of it

http://www7.0zz0.com/2008/10/08/01/841479072.jpg

For the rotator and bearing measurement can be found in their catalog.
Form the paper I took it to real life
Before installation

http://www7.0zz0.com/2008/10/08/01/703868167.jpg

After installation

http://www7.0zz0.com/2008/10/08/01/125353935.jpg

Up attach with the antenna

http://www7.0zz0.com/2008/10/08/01/958800531.jpg

May some of you say that the cage look heavy, this is right and in the same time it could hold more load. If you like to make it lighter you can take less measurement or lighter materials.
That was my experience to made the cage and I was really satisfied with the output
I hope you like it and get my explanation
Be free to ask

73s de
Abdulla, A71CV

[a71an]

You did a great job there A71CV, really a great job, I am very proud of you, and this is how a ham should pay for his hobby.

I also like the way you have presented all of that neat work here.

All of the best A71CV

[A71BX]

I'm really surprised to see this type of design

The new idea is that you can assemble and disassemble the cage very easy

This idea is useful in portable operation with 3 elements yagi or a rotatable dipole

73 Abdulla

[A92GR]

Hi Abdulla

Very nice idea... I have one remark though,

Looking at your design i think the height of the cage is a bit small.
I wonder how effective it would handle the side stress it would get from strong wind. The actual length of the top mast inside the cage is about 30cm which i believe is less than ideal. And looking at the final photo of the minibeam...hmmm i think you raised the antenna too much above the cage.

How about using longer threaded rods and putting a middle plate somewhere in between to stabilize the cage??

Nevertheless, Excellent job and congratulations.

Mohamed A92GR

[a71an]

Adulla, you have done a great job but I also agree with A92GR, the antenna should not been so high up on the mast, as lower it is as more going to stabilize the frame work of your cage.

By all means the idea and the work put in it is very impressive.

Wishing you all of the best Abdulla

[A71BX]

If the mast is strong enough to handle the stress, you don't need to increase the area between the bearing and the rotator, unless you have a big antenna with big wind load surface area, then you will need to change this type to handle big antennas

We need to consider that if the thickness of the mast wall is enough to handle this small yagi then you will be in a safe side.

73’s

[A71CV]

A71BX, A92GR, and A71AN
Thank you for your replies
I agree that height of the cage is a bit small, but since I am using a small antenna which only 12 kg I will be fine. Even here we don't have a strong wind all the time. Also I can drop it down if there a strong wind since I am using crank-up tower.

Also the big bearing will help as well.

Now everything in working fine


Thank you again that you like me job and I believe that it is my first experience in building the cage and I am sure I will do better work next time and take your advises in mind.