What coil?

[John D.]

I have a GTP 1350 with a stock coil. I am thinking about spending some money on a different coil. Any advise out there? What about a DD coil? Is there any difference in a DD coil and my stock coil? Please help, I am so confused. I know this question has been asked before by someone, however I cannot find any info.
Thank You very much for your help.
Your Friend,

 

[John-Edmonton]

DD coil works great in mineralized soils, and will punch deeper. It will also read bottle caps as coins, but all DD coils will do this. I have used mine on the beach and pulled out some nice deep targets. The 12.5 inch crossfire II coils will get good depth in neutral soil, and will also size the object for you. If you do a lot of playgrounds, the sniper coil is good, as it gets close to the play equipment where the bigger coils can't. If you like doing ploughed fields, either coil should (DD or 12 1/2 Crossfire II)work well.

So, for mostly coin hunting, the smaller coil might serve you better. If you like relic and beach hunting, the larger coils will serve you well.

Click On Link below for varlable coils available for Garrett Detectors;

http://www.garrett.com/hobby/products/searchcoils.asp

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[jongalt]

Edmontons right but i like to add that the dd also does poorly in trashier areas just because its bigger and hits multiple targets. However ive noticed increased depth with it. Check out my post on sat. I use my dd all the time now except when im in trashier area or have alot of obstacles. I pick up alot more 7 inch or deeper targets, ones i might have missed with my smaller coil. Basically im glad i have it, but its not ideal in all situations.If your working open areas looking for deep old targets its great, but in tight or trashy areas it has drawbacks.

 

[Uncle Willy]

Unless your ground is highly mineralized there would be no difference in depth between a stock coil and a DD of the same size. The DD would give you more coverage.

Bill

 

[John D.]

Thanks Everyone for your input. I have found an old plantation home and have already found many 1827-1960 coins; however I know there are many more and I am missing them. I think I will buy a DD coil for the "more coverage;" however I will wait a few days until I hear from the experts right here on this forum.
Thanks again,
Your Friend,

 

[DavHut]

Heres some info from over at the sleepy Tesoro forum. Some of it is from James and Vince GIfford. Maybe it'll help you decide:

"What is the main difference between the widescan and concentric coils? Will a widescan (double D) go deeper?"

- Generally speaking, double D coils will give you better depth than a concentric coil if your soil is moderately (or higher) mineralized. In good soil there is not much difference between the two, but a double D does give you better coverage (front to back).


- In the low to moderate mineralization in this and surrounding areas concentrics are deeper than widescans (DD's) of the same or similar size, and also discriminate better. In tests we did in mild ground comparing 5.5 and 8 inch concentrics to a 6X9 widescan showed the 5.5 to be a little over an inch deeper and the 8 inch over two inches deeper than the widescan on inground coin size targets. In moderately heavy to high mineralization the widescan has an edge but still doesn't discriminate as well, especially anything rusty and round. The coils we compared were a different brand but here's what James and Vince Gifford said about Tesoro widescan coils in response to a DD vs concentric coil question on the Tesoro forum at Tesoro.com, and also a link to the thread the info below came from.

- Stick with the concentric coils. Concentric coils are overall better discriminating coils. They are used mostly for coin and relic hunting. Wide scan coils on the other hand are designed to work in the heavier mineralization. Then wide scan "sees" 30% less ground effect that a concentric, but does not discriminate as well. The wide scan may also affect the readings on your Cort