nanoVNA - Experimenting with a LoG Loop on Ground Antenna & X-Phase QRM Eliminator

[@jptucsonaz8503]

Hi Gregg, a suggestion... Instead of metal nails into frozen ground (i.e. highly conductive!), Try using plastic stakes. You may need to drill a few holes into the frozen ground, but I think you may find the nails are inducing the ground noise. I can't really duplicate your issue here in the desert - haha...😆 73

[@ve6wo]

It’s worth a shot!

[@richs39]

Any updates on the noise source and/or elimination?

[@izzzzzz6]

Very good. We are also battling similar noise and have similar tool. The video I saw he had the loop 1 foot above the ground for the most part. I was going to suggest a magnetic loop antenna for my friend. Also loop just above the ground. We are trying CM chokes and ferrites. noise not from his house, we tested. I have a VK5 noise canceller and will also take that to him to try there. Here it's not quite as bad. S 0.5 on sideband but at his it is S7 ! We were wondering if it had to do with smart meters but at mine it seems like a noisy power pole transformer. I believe that 2x turns in a binocular is simply through and back. I think it's the same with a toroid. Whenever a wire passes through the hole it's counted as one turn. I tried with a random long piece of wire in the trees at mine to use it as the Aux cancellation antenna but it only seemed to work on noises from within my house. I'm thinking I have to get the aux antenna closer to the power lines, perhaps just close to where the main power comes into the house or any power point. I could take a live wire and wrap it around the aux antenna perhaps. Ideally I need to find all the noisy transformers but I doubt they will change them here in France.

[@elanpaim33]

great info how ever you need to add common mod balun the noise you getting is from non adding common mod balun I had the same issue however after adding the common mod balun all noise a re gone I hope this will help you vy 73 elan

[@phildurall7466]

Gregg ... Nice video coverage and method reviewing your results Sir! I too tried this same type of loop at my location and came to the same conclusion as you. I do have a noise canceller that I think I might give a spin in the future. Thanks again! 73 - KF6IF

[@ve6wo]

That’s neat to hear! I thought I was special… hahaha! The only one who has a loop on the ground noise magnet, when everyone else who tries it has amazing low noise receive… 😂

[@ZeroHarry]

Curious to see if the loop on the ground would be more effective if you were comparing it to a vertical antenna. Thank you for the video.

[@BruceRobertson]

Great video!

[@SuburbanDXing]

Good video, Gregg. My video on the LoG was among the first on You Tube and I have been using it for several years with very good success. That said, it was NOT a success at my late father's QTH, as a pesky noise source rendered the LoG ineffective. Your video echoes his experience with this design. The LoG is certainly an antenna worth trying, but as in life, there are no guarantees. Thank you for posting this (to give the other side of the coin) and 73! de WX0V

[@ve6wo]

Thank you for taking the time to leave this comment. I appreciate it.

[@sc20910]

I’m confused, why are you looking at matching the coax 50 ohm *impedance* with just the resistive part of the impedance of the LoG antenna? I’m wondering why you didn’t add that to your callcs for the antenna impedance. Or was it a small enough capacitance that it didn’t matter?

[@thomaskallmyr]

I like any program that take up the issue of Nano vna😊😊😊😊😊😊😊

[@patrickdemeyer2210]

i put it 2 meters up and defased it with a rod antenne on a corner , -135 dBm noise floor , at night 80 m perfect , daytime 20 , 40 meter ok.

[@phonix6494]

Are you mastering your videos in HDR?

[@ve6wo]

I’m not that technical with the videos. They are shot using my iPhone 13 Pro, edited on the phone using iMovie, and then uploaded to KZbin.