VLF coil size vs target size

[dbanner]

Then the target would have to be larger(and deeper) to make sense using a larger coil.

[EL NINO]

That's how I see it.

optimal coil - maintain high sensitivity and depth and separation to tiny things -0.05 gram gold O segment at a depth of 10cm, and reach enough depth on the coins -ag Denar in a depth of 23cm similar to the standard large coils ...- somehow similar simulating the Park 2 program at Equinox-likewise, I know the multifrequency 3F Whites Spectra V3. I have achieved very good results at the mars sniper 6X10 coil with Rxgain9-TX boost, DS95-96 ,,, even when detecting SEF 12x 10 coil is is a little bit more-better to give a signal on small coins -in 23cm. but again it is slightly less sensitive to 0.05gram gold O segment in depth of 10cm.In this game there is a lot of factor - magnitude of coil-ground signal, resilience-sensitivity to Emi, Separation, sensitivity to very tiny things, and reach to very small things and also male and large coins. so the optimum coil size is somewhere in the 7X10 or 8x9 range to maintain depth, sensitivity, separation, good resistance to EMI and ground mineralization,and quiet work on high sensitivity,,,

[Koala]

9

optimal coil - maintain high sensitivity and depth and separation to tiny things -0.05 gram gold O segment at a depth of 10cm, and reach enough depth on the coins -ag Denar in a depth of 23cm similar to the standard large coils ...- somehow similar simulating the Park 2 program at Equinox-likewise, I know the multifrequency 3F Whites Spectra V3. I have achieved very good results at the mars sniper 6X10 coil with Rxgain9-TX boost, DS95-96 ,,, even when detecting SEF 12x 10 m is is a little bit more-better to give a signal on small coins -in 23cm. but again it is slightly less sensitive to 0.05gram gold O segment in depth of 10cm.In this game there is a lot of factor - magnitude of coil-ground signal, resilience-sensitivity to Emi, Separation, cilitery to very tiny things, and reach to very small things and also male and large coins. so the optimum coil size is somewhere in the 7X10 or 8x9 range to maintain depth, sensitivity, separation, good resistance to EMI and ground mineralization,and quiet work on high sensitivity,,,

Agreed

Its all a compromise .

Coverage vs separation vs depth vs sensitivity to small target.

I have tried ever coil I have built with a sixpence next to a horseshoe. Separation is always the same regardless of coil size or whether its a DD or concentric. Best you can do is half the coils diameter. Same with idx, 1265x or Bandido

I have also test long thin iron above a small silver target. Here swinging down the iron a DD wins easy. But swing at 90 and its the concentric that works best.


I built a 12" DD for the idx. Waving targets in front of the coil everything is an improvement over a 10". In the real world it wasn't worth the extra weight. Great if you want to be digging alloy cans at .5 meter and more. But a backward step on small target. It hard to be exact as each field is different you could just be having a bad day. But it should average out over the months.


Someone else noticed this with there Deus and went back to the 9" from the 11" and noticed an immediate improvement on small targets.


So here on UK average fields I am confident its somewhere under 11".

[EL NINO]

Yes... there is one thing, and that is 2D and 3D separation ... before time ... it did the same test: https://www.youtube.com/watch?v=NIrZsdW3vPQ&t=1s -in 6 detectors and quantum coils ,,like this, and I found from the coil below 9 inch, middle ellipses 6x10, this test does not work ... big coils from 9 inches to 13 inches-have passed this test well ... On Monte nailboard test- 2D test it's the reverse - there's a substantially better coil in the size of 9 inches or less, like coils 11 inches ..