LTimedigger
Active member
This is sort of an extension of another posters recent question re GB #s. I seldom have to actually GB where I live, but have noticed that quite often the upper default #(90) will vary profoundly from the lower # that the machine is reading at certain sites. E.G 70/82. I will routinely reset the lower # at or a little below the default though I've really not noticed an improvement in depth. What causes this and is it still wise to reset your machine even if your not showing any mineralzation. Occacionally I will show show a slight amount of mineralzation(usually hot rocks) and will do tracking. Thanks