Ground balance & trashy sites.

[KSDfisher77]

Mineralization can be from iron (ferrite) to salt. Salt mineralization is the main problem with factory set GB. On detectors that use somewhere near 90 as default GB, salt comes in near 0. It is just the opposite on the Equinox and Legend that use 0 as default and salt near maximum numbers. If your ground is salty, the default setting is not good. If your ground has iron as the main culprit, the default is pretty good as it is balanced to pure ferrite. It seems that lots of people think the default balance is for perfect soil with no iron mineralization. It is not. It is for iron bearing soil which is most soil. It also works well when there is no iron or salt in the soil.

My T2 manual says if you are using threshold based all metal, you should GB, but it is probably not necessary in discrimination mode. I am sure this did not sneak by chief engineer Dave Johnson. Too high GB causes large silver to disappear. If you GB too negative, the small iron, iron halos, and iron mineralization start coming through as sound. Ground balance is basically a form of discrimination to stop these signals. It is like turning up the threshold, you can't hear the deep good signals because there are so many signals from these small targets.

Thanks Picketwire! That was a great video. That is 1 of the best informational videos I've watched in a long time.