9 by 12 concentric for AT Pro

[creade]

I have the 8.5 by 11 dd coil right now.My question is would the 9 by 12 increase the depth or would I really just be wasting my money

 

[G.A.P.metal]

creade
It might be a little better with the crimp on style bottle caps...and maybe help some with EMI.... but not much depth will be gained .
Gary

 

[ThTx]

If it were me, I'd spend the extra $8 - $10 and get the 5' x 8" DD coil instead. Just my opinion.

 

[Ed-D]

I agree with previous comments. If you are hunting spots that are unusually trash free, my guess is the gain in depth will be minimal, but I have to point out that is my guess. I have no experience with the slightly larger coil and who knows, maybe there is a target down deep that you skipped over and the larger coil might help bring the signal in better to where you would dig it. But I am fairly confident in saying this would only apply in a spot that is extremely trash free, which I rarely ever encounter a spot like that in which I find the good stuff. The good stuff is always found where there has been lots of activity and that means trash.

For me depth is secondary to my ability to differentiate between signals and in the more trashy spots the smaller 5x8 coil will help do that.

 

[Bart@Big Boys Hobbies]

I have the 8.5 by 11 dd coil right now.My question is would the 9 by 12 increase the depth or would I really just be wasting my money

The 5x8 is by FAR the best coil for the At pro in my opinion. Mine never comes off!

Garrett AT Gold 5X8 DD coil | BigBoysHobbies

 

[creade]

The 5x8 is by FAR the best coil for the At pro in my opinion. Mine never comes off!

Garrett AT Gold 5X8 DD coil | BigBoysHobbies

Being a smaller coil, wouldn't you lose depth ?

 

[Ed-D]

Being a smaller coil, wouldn't you lose depth ?

I'm not an engineer, but my understanding is that the smaller coils simply concentrate the magnetic field to make it a narrower beam perpendicular to the ground. A bigger coil will have a bigger search circumference around the coil parallel to the ground, where the smaller coil will have a smaller circumference parallel to the ground, but between the two the depth of the field doesn't change much. The smaller coils takes more effort to cover a section of ground for sure, but the depth isn't really effected. This is why the smaller coils work good in trashy spots. I have the Super-Sniper coil and the best way I can describe using that is to say it is like painting the ground with a pencil. But I have found some deep targets with it in very trashy places.

 

[DiggerinVA]

You lose around 2 inches with the 5x8.....but benefit greatly in trash....also pinpoints great! And is ALOT easier on the arm than the big coil. Dont have any info on the concentric, but have heard the same as posted above, and i personaly prefer DD coils. Get the 5x8 first! I have a 10.5 inch quarter in my test garden and this seems to be right at the difference in the coils. The stock coil will hit it from all directions, not great ID but diggable.....The 5x8 will not hit it. Maybe it would in different soil, but not here. But i would say the 5x8 will find 90% or better of the coins you encounter since most coins are less than 8 inches.

 

[gleaner1]

A concentric spanks dd's in mild soil. Better scrim and pp too.

 

[DiggerinVA]

To each their own, but DD for me!

 

[Bart@Big Boys Hobbies]

Being a smaller coil, wouldn't you lose depth ?

Yes you will lose a bit of depth but the separation you gain is WELL worth it. I only use the big 8.5 coil if I am in a wide open clean field trying to cover lots of ground.

 

[Diggin-N-Dumps]

ATP with teh 5x8 is the only way to run that machine....I dont think I'll ever take it off....Depth is not an issue either

 

[Irishgoldhound]

I agree with Diggin-n-Dumps and Bart. Since I put on my 5/8 coil, it hasn't come off. I love it!! Easier to pin point when you're chest deep in water. Can swing it all day everyday! Has great separation and I haven't noticed much diff in depth. I only use the 5/8 at the beach and in the surf also. The stock coil I will change if I decide to hit a field. 5/8 coil is awesome for the woods also!

 

[creade]

I run in pro mode and pretty much dig every target I come across, as there are a lot of relics in my area's. If I used the smaller coil , would I get more solid hits that I normally would pass on?