Minelab 8000

[Aziz]

Hi,

the following simple IB coil is slightly better. Even if I rise the TX/RX-bucking coil structure slightly higher. The RX-bucking coil turns count minimizes a bit and the RX coil can have more turns.
This coil goes really deep.

[Aziz]

But nothing beats a mono coil. If I leave the green RX coils in the above picture, the remained red coil structure with the same height as mono coil gives the best results. But we wouldn't have induction balance. Induction balance however simplifies the RX front-end.

[deemon]

But nothing beats a mono coil. If I leave the green RX coils in the above picture, the remained red coil structure with the same height as mono coil gives the best results. But we wouldn't have induction balance. Induction balance however simplifies the RX front-end.

Hi Aziz !

Don't forget about this topic ... - https://www.geotech1.com/forums/foru...2-mono-coil-ib

[Aziz]

Hi Aziz !

Don't forget about this topic ... - https://www.geotech1.com/forums/foru...2-mono-coil-ib

Hi my friend,

it's been a long time and I have recalled and found already your solution a few weeks ago. I didn't have time to look at it thoroughly yet.
Thanks for the reminder.

I am looking for alternative IB coil designs at the moment. So many parameters to check for.
Cheers,
Aziz

[Aziz]

Hi all,

so far, the coaxial gradiometer type coils (post #91) are the winner.

These type of coils can be used on both sides (dual-side coil) depending on ground conditions.
On mild ground (less mineralization), the upper side gives the best depth performance.
On heavy ground mineralization, the lower side of the coil arrangement must be used to avoid ground mineralization magnetisation saturation. Hence producing less ground noise.
I am searching further..

[deemon]

By the way , I have some "update" of this old mono-coil solution ... I need some time to draw it and upload here .

[Detectorist#1]

And what is your opinion for this proposal?
https://www.geotech1.com/forums/foru...art-disclosure

[Aziz]

By the way , I have some "update" of this old mono-coil solution ... I need some time to draw it and upload here .

Nice, I am looking forward to see your update solution.

[Aziz]

And what is your opinion for this proposal?
https://www.geotech1.com/forums/foru...art-disclosure

No time to look at it.

But we don't need it at the moment as we have nice and better IB coil design options, which are easy to realise.
The IB coil I am working on is versatile usable (super hot and mild ground). A two-in-one coil solution with flip-over coil design.
This is a novel concept and outperforms all IB coil designs available right now.
I hope, Coiltek and other companies are watching this thread and will offer better aftermarket coils for the GPZ 8000.

Aziz

[Detectorist#1]

This sounds very encouraging. My modest conclusion from my long experience in electronics is "if you improve something and don't see what gets worse with this solution, it means you don't know the problem in depth".
But, I which you success!

[Aziz]

Oh man!,

a lot of AI sites are too busy to make the 3D coil design image for the flip-over coil housing. I can't show you the design at the moment. Maybe tomorrow morning.
But this is trivial. The whole coil assembly is a cylinder with outer and inner diameter and has some height dimension. There is a big hole in the inner part and you see the ground.
Coil plug is at the center height either inside or outside of the coil housing.
The coil is mounted rotateable either at the center height inside or outside of the coil housing. The coil plug is nearby the rotary assembly.
That's it.

Just flip-over the coil and go detecting.

[Aziz]

This sounds very encouraging. My conclusion from my long experience in electronics is "if you improve something and don't see what gets worse with this solution, it means you don't know the problem in depth".
But, I which you success!

My coil software is capable of to calculate every arbitrary parameter. It can't fail. It is even better than AI.
But it takes some time. I have only a 4-core CPU.

[Detectorist#1]

Two-core human brain is more powerful that 4-core CPU!

[Aziz]

This coil design is now much better.
It has both RX bucking and TX bucking coils.
TX bucking coil is a one turn loop anti phase relates to TX windings.
The coil model is prepared for basket-weave coil. This will increase it's performance more. I will show this soon.
Note, that the one turn TX bucking loop reduces the number of RX bucking coil turns and will lead to less target signal reduction.

Do not count the number of turns yet. This is a rough geometry finding process at the moment.
For the exact IB coil parameters, we have to specify the RX and TX wire parameters yet.
Aziz

[Aziz]

Look,

the one turn TX bucking coil loop reduces ground noise a bit on hot mineral grounds further. Bottom part would be for very hot grounds. The upper part of the coil (flipped-over for operation) would be for mild grounds with extended detection depth. Note, that both TX and RX coils have maximum possible sizes.

Magnetic field strength cross-section of the latest IB coil design:

Aziz