Why Minelab don't make small coils for the GPZ?

[Kev]

Hi,
It took me a few attempts at making small coils for water detecting before I realised it was not my coil building ability that caused erratic behavior, but the carbon middle shaft that was to blame.

The shaft acts a lot like a poorly shielded coil being capacitively disturbed when objects come close.

I suspect this is why Minelab never released a small coil for the GPZ as it would also require a fiberglass shaft. There's certainly an advantage to using smaller coils with gold specks down to 30 milligrams being detectable up to 2 plus centimetres in goldfield conditions.

I expect that surf hunters using modern CW detectors with accessory coils will experience levels of interference.

Cheers
Kev

https://vimeo.com/1022736168?share=copy

[Detectorist#1]

Hi Kev,

Using of GPZ7000 for searching of 30mg gold at 2 centimeters is like using of boxing glove for killing of the fly. For this purpose, using of good pinpointer is more suitable.
See please my post https://www.geotech1.com/forums/foru...n-size-objects
This pinpointer finds 50mg gold at 1 inch. The variant with long (1 meter) PVC 25mm in diameter pipe is suitable for rivers. The PCB plate with electronics is in down end of the pipe and the capacitive influence of the water and hands is seriously reduced.

[Nightryder]

You may find this thread helpful


Also check out this YouTube Channel. It has many videos about the GPZ but I randomly picked this out:

[Kev]

Hi Kev,

Using of GPZ7000 for searching of 30mg gold at 2 centimeters is like using of boxing glove for killing of the fly. For this purpose, using of good pinpointer is more suitable.
See please my post https://www.geotech1.com/forums/foru...n-size-objects
This pinpointer finds 50mg gold at 1 inch. The variant with long (1 meter) PVC 25mm in diameter pipe is suitable for rivers. The PCB plate with electronics is in down end of the pipe and the capacitive influence of the water and hands is seriously reduced.

Hi Detectorist#1,
Nice pinpointer, I'll study that more for a sniping aid.
GPZ's not really a boxing glove for the situations I find myself, right tool for the job is key. Where I hunt the gold is very patchy, and spotty, lots of glacial pushing around.

Where in the image will you poke your probe?

A 30mg speck can alert you of a patch. 30mg 2cms, 100mg 15cms, 500mg 22cms, 1gm 35cms. Your odds of hitting a patch are greater.

Cheers Kev.

[Kev]

Hi Nightryder,
Thanks for the links.
Cheers
Kev.