VLF question

Martin - Southwest UK All Messages By This Member #21052 I have experimented with various Loop on the Ground receive antennas, and the closer to the ground (or buried beneath it), the more the higher frequencies become attenuated. ? ? When buried a few inches below the ground, signals on frequencies above about 2MHz become significantly attenuated. ? If you could bury a suitably sized loop even deeper, I think it would work quite well on the VLF bands, and perhaps be less subject to external interference. ? Regards, ? Martin ? On Thu, Feb 13, 2025 at 06:29 AM, Doug Reed wrote: toggle quoted message Show quoted text I'm more inclined to the simple "LOG- Loop On Ground" concept.
Fred Moore All Messages By This Member #21053 Good evening Dave.? Regarding your statement?But be sure to introduce the break at the top of the loop. I Just purchased some copper screen #80 mesh and plan to cut it into possibly?3" to 4" wide stripsand wind it on the pipe starting at the top and basically covering the box at the bottom.? I think that 80 mesh is a tight enough weave. Fred N4CLA toggle quoted message Show quoted text On Tue, Feb 11, 2025, 14:44 W0LEV via <davearea51a=[email protected]> wrote: You could cover your PEX with a continuous layer of a good conductive material like copper mesh or copper (bronze) screen.? But be sure to introduce the break at the top of the loop.? I believe PEX is nonconductive.? With the screen or mesh, it should act much like using a copper tube. Dave - W?LEV On Tue, Feb 11, 2025 at 7:41?PM Martin - Southwest UK via <martin_ehrenfried=[email protected]> wrote: I think the skin depth of the various conductor types you have suggested may be an influencing factor. ? Some of the antenna articles on the website could be of interest. ? ? Regards, ? Martin ? On Tue, Feb 11, 2025 at 06:13 PM, Fred Moore wrote: would I have the same shielding as an the copper pipe loop? -- Dave - W?LEV

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VLF question