Ground balance compensation coil

[Ivont]

Hello guys. I apologize in advance if this has been discussed, but I couldn't find a topic. Has anyone made a coil with a built-in ground balance compensation coil?

[Ivont]

Karl, my friend, what do you think about this?

[Skippy]

Presumably you are not thinking about coils with a Figure-8 shaped receive coil, such as the "Bigfoot" ?

[Ivont]

No, I have no idea. I just want to know if there is a professional detector with a third coil, or something similar, to eliminate the ground effect. The goal is to capture a signal only from the soil. My other question is related to changing the inductance of the coil. I did some tests, and it turned out that some soils increase the inductance and others decrease it.

[Carl-NC]

Figure-8 (Bigfoot) and butterfly coils (GPZ7000) are the methods I know of. Yes, ferric soils increase the inductance (higher permeability) and saline soils decrease the inductance (loading effect).

[pito]

and this one, with ferrite rod