cz-3d with 10.5

[sling]

what do you think about this combination?
would it be better on heavy soil?

 

[AllenOK]

If so, don't. The bigger coil sees more mineralization. A smaller coil, like the 8", sees less mineralization than the 10.5". If your targets are terribly deep, you might even try the 5", as that coil sees even less mineralization than the 8".

HH from Allen in OK

 

[sling]

yes i ment highly mineralized soil.
did you try the 10.5?
it looks not concentric its like a widescan dd.
and dd can handle bad soils much better.
thats only my guess.