Goldquest SS - 5in Coil Test

[Anonymous]

Before shipping the Goldquests to Mr Bill, I thought I would try one more coil size for comparison. I wound up a 5in coil of the same inductance as the 8in and 11in. On the 0.2gm nugget, the range improved to 2in; on the 0.9gm nugget it had dropped to 5in, and the gold ring down to 10in. This shows that for physically small targets, provided they are detectable in the first place, and at ranges considerably less than the coil radius, some improvement can be gained by using a smaller coil of the same inductance.
Eric.

 

[Anonymous]

I added a 5 inch coil to my graph. The crossover between the 5 and 8 inch coils occurs at a distance of about 3 inches.
Robert

 

[Anonymous]

[No message]

 

[Anonymous]

My graph is just an alternate view of the same information that is in your graph of coil curves.
I don't know if you checked your Goldquest SS coil comparison measurements against your curves. The graph below is a blowup of the corner of you graph. I only put 3 curves in so it would not get too crowded, and added the measurements for 3 of your targets. Your curves gave excellent predictions for all the targets except the .5 gm irregular, and even that was pretty close.
In this graph the curves are not semi-circles because I stretched the horizontal axis for a better view.
Robert

 

[Anonymous]

I am serious, I would like an idea of how a coil picks up different iron trash sizes. The way it looks on the good stuff, as in your graph, it looks like a larger coil (15" for instance) would bypass small iron junk, or is it just too easy to pick up the small iron and other junk? I mean small things such as rivits and little bathing suit buckles, hairpins, washers, etc.. Thanks, John