Introducing the SULA: An affordable unidirectional DX-grade loop antenna?

[ThaDood]

https://swling.com/blog/2022/08/introducing-the-amazing-sula-an-affordable-unidirectional-dx-grade-loop-antenna-that-you-can-build/          Looks tempting.

[kris]

   Thanks ThaDood for the very valuable material for repetition and your own experiments.
It gives you to think, instead of placing a typical magnetic loop in the garden, you can see a better SULA directional antenna. The other two parts of the publication are now available.
 When I am old enough that I no longer climb a tree, this antenna will be my salvation.

[Zoidberg]

Sounds promising. I've been pondering several inexpensive readymade and homebrew amplified loops.