Have been running some tests with my new Gold Bug 11 and my old Garrett Stinger to see how they
compare on small targets; I tested both with several different size gold rings ( one is a babies ring
that weights 2.1 grams ) and a small piece of gold that weights 0.03 grams. Both detectors was
able to detect all, but I found that the Stinger would detect every target at a farther distance. This
was the first surprise I had, then I scanned two different assay lab, certified samples, of ground
silver ore that they were kind enough to send me for some testing I was doing, one sample was
assayed at .023 oz/t that weighted 2.91 g the other one assayed at .023 oz/t and weighed in at
6.31 g both were in a small plastic bag that they were sent from the lab in. Much to my surprise
the GB11 would not detect them, even when I used both at one time. The real surprise was that
the Stinger would detect both, no matter if it was one at a time or both at the same time!
The Stinger would detect the samples up to one inch from the coil, but the GB11 would not even if
I wiped the coil with it. Both machines used there smallest coil, 3x5. Tests were air test, indoors
and both detectors had there coil hanging clear off the table used, and both used in the same place.
Both detectors were used in A/M but I also tried the Stinger in its TR mode but with no results at all.
Surface area of the samples were 2" x 1 1/4" x 1/4" for the 6.31 g sample and 2" x 1/2" x 1/16" for
the small 2.1 g sample. As both of these samples were prepared by the lab I don't know what mesh
size they are but I tried my 80 mesh and none of it would pass through it; maybe its 50 or 60.
The results of this test gives me some ideas on sampling that I never considered before, will have
to obtain some for other minerals first to see how they do.
compare on small targets; I tested both with several different size gold rings ( one is a babies ring
that weights 2.1 grams ) and a small piece of gold that weights 0.03 grams. Both detectors was
able to detect all, but I found that the Stinger would detect every target at a farther distance. This
was the first surprise I had, then I scanned two different assay lab, certified samples, of ground
silver ore that they were kind enough to send me for some testing I was doing, one sample was
assayed at .023 oz/t that weighted 2.91 g the other one assayed at .023 oz/t and weighed in at
6.31 g both were in a small plastic bag that they were sent from the lab in. Much to my surprise
the GB11 would not detect them, even when I used both at one time. The real surprise was that
the Stinger would detect both, no matter if it was one at a time or both at the same time!
The Stinger would detect the samples up to one inch from the coil, but the GB11 would not even if
I wiped the coil with it. Both machines used there smallest coil, 3x5. Tests were air test, indoors
and both detectors had there coil hanging clear off the table used, and both used in the same place.
Both detectors were used in A/M but I also tried the Stinger in its TR mode but with no results at all.
Surface area of the samples were 2" x 1 1/4" x 1/4" for the 6.31 g sample and 2" x 1/2" x 1/16" for
the small 2.1 g sample. As both of these samples were prepared by the lab I don't know what mesh
size they are but I tried my 80 mesh and none of it would pass through it; maybe its 50 or 60.
The results of this test gives me some ideas on sampling that I never considered before, will have
to obtain some for other minerals first to see how they do.