Anybody know of a pic showing what the field looks like under the pro coil?

[Patrick(MI)]

Possibly an artists conception of what the detecting field looks like underneath the pro coil.

 

[LabradorBob]

I understand the DD coils are like this I I
I I
I_________ I
This would be a side view!

 

[dewcon4414]

The coil puts out a narrow receive field the length of the inner coil. Unlike the round coil that produces a round cone shape. The deeper the target the more toward the center the target will pinpoint... meaning it produces a narrowing much like the round coil. Kind of like this: =======
=======
======
====

Dew

 

[Ray-Mo.]

n/t

 

[LabradorBob]

This is what it looks like under mine!

 

[Ray-Mo.]

Now I think the grass is a little greener under yours

 

[LabradorBob]

On a serious side this should be close.
First is pro coil,second is a mono type coil.
LabradorBob

 

[Ray-Mo.]

n/t

 

[Patrick(MI)]

n/t

 

[Elton]

n/t

 

[digitrich]

Like a 2x10 piece of lumber, running from front to back along the center line of the coil and you are looking at the top edge of the board....2x6 in drought and 2x4 in coal cinders

 

[chaddy]

What about the "outside the coil" response?
Say about an 1" from the outside edge of the coil.

I would love to detect in a field with grass that low.

 

[LabradorBob]

A new drawing showing the outside coil field,and explaining why the diagram ray-mo found looked as such.
The eddy currents actually keep getting larger till they get fairly close together under the coil.
Any metallic object the field hits,creates an electrical current in the object,cutting the eddy current short, and bounces off,
it creates a different kind of current,that goes right through the eddy currents,back to the reciever side of the coil.
This is in the center of the coil where the two D's overlap!
The drawing just shows the current in the center of the coil,but it goes all along the outside edge.
Thanks,
Harold Reese