I know one thing about the T2...

[KCK]

I took it to a local school ground just down the street from the house. I hunted the exact spots that I had hunted with my Garrett GTI 2500 and it's pulling coins out at 4-5-6 even 7 inches deep okay? Total .27 cents. Great detector right?

But now I'm mad at my Garrett.... So I take it down to school behind the Tek T2....Same exact area right...no difference...I come home smiling.......and 54 cents richer great detector right? Huh????

45 Minutes later I'm mad at the Tek T2...sooooooo I grab the Tek T2 and head down the street...God only knows what the neighbors are thinking about this nut walking down the road with a shovel and different detectors in hand? This thing came up in the exact same area again with to sweet old metal buttons...I give up for today!

And actually I 've learned three things tonight.

1) The Garrett GTI 2500 is a great machine...
2) The Teknetics T2 is a great machine...
3) I'd better start slowing way down and learn how to Metal Detect again! hehehehehehhehehehe

 

[Beachcomber]

It's always been that way. If you take steps bigger than the toe to heel length of a DD coil you are not covering the ground and you are missing targets. With a Concentric Coil it's even worse. You have to take baby steps with a Concentric Coil because it's detection pattern is in the shape of a funnel getting smaller the deeper the target. At it's maximum depth a Concentric coil is only seeing about a 1" circle so to really cover an area thoroughly you would have to only move the coil forward 1" per sweep. How many of us have that much patience At least with a DD coil like the one on the T-2 you can move almost 11" per sweep without missing hardly anything.

HH

Beachcomber

 

[Eddie Currents]

[quote Beachcomber]It's always been that way. If you take steps bigger than the toe to heel length of a DD coil you are not covering the ground and you are missing targets. With a Concentric Coil it's even worse. You have to take baby steps with a Concentric Coil because it's detection pattern is in the shape of a funnel getting smaller the deeper the target. At it's maximum depth a Concentric coil is only seeing about a 1" circle so to really cover an area thoroughly you would have to only move the coil forward 1" per sweep. How many of us have that much patience At least with a DD coil like the one on the T-2 you can move almost 11" per sweep without missing hardly anything.

HH

Beachcomber[/quote]

A interesting point!

EC

 

[bugg]

the same old picture of himself on the forum every day probably needs a little help! LOL.

 

[Jackpine Savage]

too much in the overlap difference between the 2 coil types. BC maybe be correct when using a DD on the beach, compared to the concentrics they do cover more ground per sweep, but in iron infested or trashy sites DD coils will miss some targets unless you overlap at least 50%.

Tom

 

[Big Red]

A person that keeps lookin at that same picture That Ted keeps posting needs even More help !!

 

[bugg]

I find his tractor to be quite sexy!!!!!

 

[Varmint]

the concentric is a round funnel, while a DD is a "flattened" or oval shaped funnel.

The difference is, the concentric funnel shape is defined by the inner coil diameter (for the most part) while the DD ovoid funnel IS the entire length of the center bar (coil overlap area or where the two "straight" edges of the D's are in close proximity.

The net result then is, the DD requires less overlap at the surface or on shallow targets, but both coils end up with a virtual "point" at maximum detection depth.

Absolutely the DD covers more shallow depth per swing, but at max depth the two coil types end up looking quite a bit alike. This is easily demonstratable, bury a coin at the max depth for your machine and DD coil combo. At max depth, the target will give a more solid response only when the coil is centered (front to back and left to right) over the target.

DAS

 

[ojm bc]

n/t

 

[Mike Hillis]

However, until you reach that extreme point of detection, the DD coil will give a wider detection field.

Surface to 3" might give you 11", then 4-6 might give you 9"ish, then and so on. Its easy to measure. Just bury a few coins at say 4", 6", 8" and 10" and then lay a ruler over the top with the 6" mark centered over the coin. Then sweep over the coin starting with the toe of the coil behind the target and slowly moving the coil forward until you pick the coin up. You'll be able to clearly see the shrinkage of the detecting field.

You can do the same on real targets in the field. Just poinpoint, and mark it.

HH

 

[Mr.Bill]

I sniped this cut from the Garrett advertisement, but it does give a good explanation about the DD coil. I

 

[ojm bc]

n/t

 

[BuckeyeBrad]

wait...... you mean you were just trying to be helpful and share information??!

 

[KCK]

Great information Mr Bill, Thank you for the information!