Question

[sayan1345]

what device of this forum can detect gold nugget?
thanks AYDIN

[waltr]

All of them if the nugget is large enough and close enough to the coil.

[kt315]

your wifey can detect that best. just put the gold in her hand.

[Funfinder]

Any newer detector - 5mm nuggets with 20cm coil or smaller.

Cut some iron nails into small pieces and test it.
Washing pans or sluices for the reall small grains and flakes.

[bernte_one]

mirage pi from sven1,

with high frequency and good fast coil

[kt315]

what you need one either with good discrimination FERROUS-NONFERROUS with low depth or without the discrimination with good depth?

[sayan1345]

thanks for all
I've made GSabreLight and IDX
both good works and good Discrimination
but both machines can not detect gold nugget

[Carl-NC]

You need to say what size gold nuggets you want to detect.

[sayan1345]

thanks Mr Carl for quick replay
2 mm gold nugget

[Carl-NC]

That sounds like 1/2 gram or so. That will be difficult with most homebrews.

[Funfinder]

5cm coil at max. 3cm depth very slow and careful search
but you better use some gold-washing-equipment and
you must first dig probe-samples from different locations.

I doubt that anyone finds such small nuggets with MDs.
But you can't know if all nuggets are just 2 mm small.

[dbanner]

Old Lobo circuit operating at 20kHz or so, with proper ellipse DD coil should be able to detect small nugget, not sure about 0.5 gram though.
On youtube there is a video demonstrating the old tesoro Lobo VLF testing out with small nugget size gold. Video says 0.33 gram
The lobo is a popular project.https://www.youtube.com/watch?v=_fUSkf3siQw

[kt315]

DB in my understanding Tesoro never did DD coil. just planar classic. if you have the pics proofing this is DD give please pics.
Tesoro is very conservative in a design and if did/found something did that to the its end.

https://www.youtube.com/watch?v=YSCtUZlEr8Y

[dbanner]

DB in my understanding Tesoro never did DD coil. just planar classic. if you have the pics proofing this is DD give please pics.
Tesoro is very conservative in a design and if did/found something did that to the its end.

https://www.youtube.com/watch?v=YSCtUZlEr8Y

Huh? I never said that tesoro lobo factory coil was DD. It is well known fact that there are parameters for a self made ELLIPTICAL DD coil for lobo. This is what I was refering to.
I was saying a self made lobo circuit with an elliptical DD coil.

[sayan1345]

Thanks to all for the guidance
Tesoro Lobo is better or GSabreLight
I've made GSabreLight and IDX , both good works and good Discrimination
now , I want to make Lobo
what is your opinion? lobo is better or gold bug?