difference between dd coil and a concentric coil

[plugger]

Is one better than the other I have both and I was wondering when is the best time to use each one

 

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[DeepseekerADS]

DD covers more ground

 

[airscapes]

As has been said, one puts out a cone shape field the other puts out a knife shaped field. If you are in a trashy area or high minerlaization the DD will be better. If you are in an clean area with mild ground the concentric will most likely be better but you will have to overlap the swings more to get good coverage at depth. I use my DDs for everything except the beach (consentric slides nice on the sand) and fields with no trash and stubble.. the open style DD get hooked easy. Use them both, you will quickly find what works best for you.
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Truth About Search Coils

 

[Charlie P. (NY)]

Both have advantages in certain situations and with certain detectors. I like the DD because I hunt in a lot of areas with metal junk. The DD has a long and narrow sweet spot and will get between objects to good targets below them . . . sometimes (if the objects are side/by side instead of front to back). I am used to "X"ing a hit to see if it stays a constant return.

Concentrics are easier to pinpoint with; but DD can do just as well even if taking slightly longer. DD's have more useable field strength at the lower depths (the Concentric is just the tip of the cone, vs. a coil length field of the DD).

It is also a consideration of what you detector came with as standard. If it came standard with a concentric then the internal parameters for tuning may be favoring that type. That is assuming the manufacturer's know their detectors and decided which it would do best with. I'm just guessing at this one, though.