Minelab 8000

[Aziz]

Hi all,

I have finally added an 18 inch DD-IB coil to the coil comparison.
It is not good performing. The TX/RX coils are relative small compared to other coils. This is the reason for.
The zipped Excel-file of the comparison data is attached.

[Aziz]

Hi all,

the Super-D coil comparison (GPZ 7000 coil) would cause me much more work. I have to sweep the target over a large surface area instead of sweeping it at it's maximum response axis line.
At each target height, I have to take the maximum value target response. So I will have a large two dimensional target response table.
Designing the coil won't be an issue anymore however. But putting the target response is a big deal.
Will it be really worth all the work?

[Aziz]

Regarding the Super-D coil:

I don't know any internals how the two RX coils being processed, connected, nor their inductances.
Is this a two-channel processing or are the RX coils connected as anti-interference coil.
As long as I don't know the real answers to the questions, I can not make the coil analysis.

[Carl-NC]

Is this a two-channel processing or are the RX coils connected as anti-interference coil.
As long as I don't know the real answers to the questions, I can not make the coil analysis.

They are combined as anti-interference coils. That's why you can't simply bob the coil to GB, you need that yellow toroid ferrite they include.

[Aziz]

They are combined as anti-interference coils. That's why you can't simply bob the coil to GB, you need that yellow toroid ferrite they include.

Hi Carl,

thank you for the info.

As I have assumed, the coil analysis will cause a lot of work. The Super-D coil configuration wouldn't do well too. So there must be gain compensation in the front-end amplifiers to get the required sensitivity.
Cheers

[Aziz]

Hi all,

I am implementing the 3d cubic spline interpolation. I hope, Google AI didn't make any bugs.
This feature will help reduce the number of scanning points and make a smooth coil geometry and more accurate coil designs possible.

So the evolution and development goes on...