Whites gmt mini double dd shooter coil

[ProspectorALEX]

Hi just wondering if anyone uses the mini coil. I tried it it seems like the same as the giant one. Wondering if it has to be tuned different from the big one. Thanks



Alex

 

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[Hard Prospector]

You should be able to increase the gain/sensitivity some without an increase in ground balance issues using the 4x6 shooter(over say the 6x10 goldmaster) Thats the simple answer without getting into the dynamics of loop sizes.

 

[Jim in Idaho]

Yes...increased gain, and the ability to get the coil into smaller places between rocks and around obstacles.
Jim

 

[Jim Hemmingway]

Small coils see less ground mineral than do larger coils… resulting in better bad ground handling performance, or otherwise being able to increase the gain as noted in the above post. This may be an overlooked advantage particularly when using high operating frequency units such as the Goldbug II or in this instance the White’s GMT. They also have less target masking issues…that is to say better target separation… and suffer considerably less from EMI than larger coils.

Small coils are lighter on the arm... can be a significant advantage over the course of a long prospecting trip.They cover less ground, but I think in many prospecting scenarios that is an advantage. And while small coils are less deep-seeking to a point, it is surprising how well they do perform in that regard. They are more sensitive to small nuggets, certainly enhance target pinpointing, and are more maneuverable in the field... as noted in the previous post.

Jim.

 

[Hard Prospector]

The 4x6 and 6x10 coils really do compliment that machine's abilities, if I take the GMT out for the day they both go with it. However, if considering the GMT 8x14 accessory coil for prospecting forget it.