Question

[Low-Boy/LCPM]

It seems to me so far that pull tabs come in at the 7.5 freq and some gold rings come in at some of the same ranges (VDI) that pull tabs come in at?

So if you are hunting and see the 7.5 freq it seems to me that a gold ring should come in at the 22.5 freq? So if you dig only 22.5 freq then at least you cut down on the pull tabs? I know that other trash will come in at the 22.5 freq like aluminium but maybe if what I saw today I can cut out at least one trash target that seems to liter parks and schools I am a tiny bit closer to gold? Now I know that to avoid the 7.5 freq I could be passing up buttons but I am not talking relic hunting I am thinking about schools and parks...

 

[Rob (IL)]

I wish it worked that way but it doesn't. Gold rings ID with 7.5 also, depending on size. My biggest gold ring I thought was a penny.
[attachment 205889 champs3.jpg]

Best Frequency to Use is determined not only by metal content, but also size and thickness. For thicker coins with high silver content there is no question that 2.5 kHz will hit harder than 22.5 kHz. For US nickels 22.5 kHz will hit hardest. 22.5 kHz may also work best on small thin coins, even those with high silver content, due to skin effect. High frequency may also work best on low silver content coinage. 7.5 kHz is typically better on copper coins. Test the detector for the items you want to find. If all you want is US silver, then you should use 2.5 kHz. If all you want are [size=large]THIN[/size] gold rings or small nuggets, then select 22.5 kHz. If you want the best depth on a wide range of targets, use 3 frequencies.

These are from notes I saved from Carl.
ROB

 

[Larry (IL)]

Hunt the way you want but ignoring 7.5 dominate targets, you will miss a lot of nice targets, larger gold rings/coins, Indian Head cents, tokens, buttons and tons of other stuff. But that is what is so nice about the V's, you can set them up anyway you want.

 

[Low-Boy/LCPM]

Yes that make more sense you can't get away from trying to guess on gold

 

[CyberSage]

Don't forget that you still have 2 other frequencies to help you out during pinpointing. Don't just look at the dominant pin point frequency. Look for the second most dominant as well. A 7.5kHz followed by a 2.5kHz is very different than a 7.5kHz followed bye a 22.5kHz. You have heard it said that if your looking for gold you need to dig it all. I agree, but US coins, aside from the nickel are much easier to pick out at depth. The rule for me is if the 22.5kHz is the weakest during pin point, and the sizing is right, then dig it. Copper/bronze, Silver, and clad present themselves clearly for the most part. The exceptions being coin spills, and coins in and around trash. Tips of rusty nails, and wire can present themselves much like a deep coin. Usually the pinpoint strength, or lack of gives them away though. Another good rule of thumb is if you are finding good coins at a given depth consistently at a location. Dig all targets at that depth that give a +VDI. I have found 2 V Nickels and a nice Buffalo Nickel in the last few hunts that way. All were within a couple of feet of Silver Dimes or Wheats. Also as coin depth gets to the edge of detectability on the V3/V3i you will see the pin point frequency bars start to get very close together, showing only slight variations of dominance. Here is a Wheat penny that in the end measured out at 11 inches deep from 3 hunts ago.


[video]http://www.youtube.com/user/CyberSageVision#p/u/0/kJBszp5Hwo0[/video]

Jack

 

[nw1886]

A couple years ago I did a test on some quantity of scrap gold. (I did not have one hit in 7.5 frequency?) A few days back I gave it another shot and there were many.....10K men's/ 7.5 dom. That first group (though large) was void of lg. men's 10K, and since 2 year's ago I've found 5....all 7.5 dominant. What they lack in purity, they have in size.

This whole gold vs. aluminum thing will be with us a long time, and the only thing that has been" best thing" for me, is to adjust where I hunt...then dig it all.