Start of build Automatic Magnetic Loop controller – PART 1


Recently my colleague, Rob PA5RH and I came up with the idea to build an automatic loop tuner.

Rob is busy with the software part where I have already started on the mechanical part.

As loop, Cellflex 1 1/4 inch Coax cable is used. This has a (copper) outer diameter of +/- 38mm

I want to use the loop indoors high in the ridge of the roof.

In order to be able to (continue to) make mainly digi connections at 40m, When my balcony mast cannot be raised at that time.

Think of Winlink, FT8, VarAC etc..


The Magnetic Loop I want to make has a circumferenceof of about 450cm / 140cm in diameter.

Since the magnetic loop will hang inside my house, there are not many requirements for weather resistance of the whole.
This will make the whole construction a lot easier.

First the construction and fixating of the magnetic loop

This is done with large clamps, where the whole including variable capacitor will be mounted on a TRESPA panel.



Until the next update!

How useful was this post?

Click on a star to rate it!

Average rating 5 / 5. Vote count: 6

No votes so far! Be the first to rate this post.

We are sorry that this post was not useful for you!

Let us improve this post!

Tell us how we can improve this post?

You may also like...

Leave a Reply

Your email address will not be published. Required fields are marked *