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Steve Herschbach

Jonathan Porter On Mastering The Minelab Gold Monster 1000!

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5 hours ago, fred ned gold said:

I was wondering apart from size what are the trade offs or avantages for using the different size coils or there going to sense just the same With area covered to being able to fit in tighter places

Just the typical trade off seen with any similar machines. The small coil "sees" less ground and so can be run at a slightly higher sensitivity level in bad ground, and with a more concentrated magnetic field. This in turn results in a bit hotter response to small gold than with the larger coil, but the difference is small. The large coil on the other hand does produce a larger magnetic field and so will reach a deeper on larger nuggets.

Big coils not only "see" more ground but they see the unwanted targets in the ground that can confuse the detector, like trash items or hot rocks. By "seeing" a smaller volume small coils are less likely to see multiple targets at once, resulting in cleaner signals, plus better discrimination results when discrimination is employed.

Obviously the big coil covers twice the ground while the smaller coil gets into tighter locations. Which you want to use just depends on the job at hand and since both come with the detector there is no need to force the choice. Rough rules of thumb - smaller gold or smaller areas to cover equals smaller coils. Larger gold, larger areas to cover equals larger coils.

metal-detector-small-coil-versus-large-coil.jpg

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