I like how you left the lugs on the side where you can add any sized element you want 🙏 Antenna element size is critical for the bands you are trying to use. Again, Great work my friend 🙏

As you can tell by the time stamps of my comments. I can share with you some techniques to allow such a small RF meter to show good deflection at a distance for HF. You would need to feed the recrifying circuit via an inductor from the small antenna and it would have to be tuned to resonance. It is tricky and I haven't seen other radio enthusiasts do it yet. You have inspired me to demonstrate such a principal. It is tricky but with the appropriate magnetic material we can use an external magnetic field to tune to resonance. I'm not a crusty ham saying I know it all I am an experimental ham that hasn"t yet shared my knowhow. The differential sides of both the input and output need to be fed at opposite ends. Imagine, unlike a common mode choke over a ferrite that has two parralel conductors, we feed the two parralel conductors from the opposite sides which actually adds to the coherence of both the E and B fields. Two opposing currents running in opposite direction actually add together.

We call these, "relative RF field strengrh meter".

Very useful video with good examples of how to use the meter. Many thanks - Shaun VK6BEK.

thank you

Nice Video & Nice Work my Friend ⚡🙏⚡ 73 from the Prison Isle (Australia) VK3VKe 👌