A
Anonymous
Guest
Using the 8in coil on a Goldquest SS, the smallest nugget in my collection that gives a good signal is 0.2gm weight. This is detectable at just over 1in in air. I think this nugget is of US origin as it was donated by Terry Crenshaw. Again, it must be stressed that purity of the gold can have a great effect on range.
Eric.
Eric.