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Fred,

Can you list the web sites that talk about this type of antenna?? I have never heard of the gap that you mention nor the shielding.

I am familiar with loop antenna but this seems very different then a normal loop?

Thank you

Tom

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Tom Anderson

SDR_Radio@...

On Feb 12, 2025, at 2:13?AM, Fred Moore via <n40cla=[email protected]> wrote:

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I am thinking of making a VLF loop out of a 10 ft piece of PEX pipe with many turns of wire inside the PEX and a plastic junction box on the bottom.? I have read several articles about doing the same thing with copper pipe as the shield and making a gap in the top center of the pipe. The purpose of the gap is to shield the windings from electrical noise and allowing the magnetic waves inside the pipe.?

There are several?articles on how to shield VLF antennas ie; Ferrite Rods, from electrical noise.? Making copper pipe loops and metal electrical boxes at the bottom and cutting a gap in the pipe at the top is basically the same as shielding the Ferrite Rod with aluminum and leaving an air gap for the magnetic waves.? Pex is a different animal as if you cut a gap in the top of a PEX loop, you lose the round loop. So my question is this.? What if I keep the round loop attached to the plastic electrical box and shield the entire round loop with #80 copper mesh and not the box, would I have the same shielding as an the copper pipe loop?

Fred

N4CLA