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.
