I am trying to figure out where the line (or range) is to where a DD coil is the best coil for conditions and where a concentric will get the most depth it's capable of. I have another detector where it has been figured out that if your gb number is 28 or lower, its best if you do use a DD coil, but it its higher you can go for max depth and use a concentric. Seems everyone, for the most part, uses just the DD coils on the AT Pro, but I want the depth that the 9 X 12 can give me if the ground matrix will allow it. So, at what number would I say, yep gotta use a DD coil or I'm going to lose depth?
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AT Pro Ground Balance
- Thread starter Canewrap
- Start date
Eddie Current
Member
The concentric coil will get better results in trashy areas and also gets closer to structures... not sure about your depth question,,, it is a smaller coil so your coverage area will be less
The stock and 5x8" DD coils go deep, trust me on that one. Because the DD's are better in mineralized soil they are popular and very good at what they are designed to do. As far as numbers go for GB I don't worry to much about it to tell you the truth, if I'm able to hunt at close to max sensitivity with no issues thats good enough for me. J.Edmonton would be able to elaborate on the concentric coils as he seems to like the 9x12".
Cheers!
Cheers!
asiandigger
New member
The concentric coil is good getting closer to structures( especially when you're in a TOT LOT) won't pick up the metal bars...but NOT IN TRASHY AREA. Depth wise, it's almost the same in my opinion. Everything from coins to jewelry I found is around 4 to 6 inches...so both are in that range already...good luck.Eddie Current said:
That's what stops me from buying the big 9x12 concentric. It would be the cats pajamas for the rich gentle black loam of more northernly areas than here. But the south were I am now is down right spooky at times for mineralization. I have never seem such crusty coins and corroded aluminum\pot metal tokens etc., as I do down here.