Why I Prefer Using Concentric Coils Over DD Coils:smoke:

[John-Edmonton]

Click for short video: https://www.youtube.com/watch?v=RtQKNK20UnA

Concentric coils just give me more ID characteristics and allow me to accurately guess the depth of the target using only the audio, as shown in the short clip.

 

[coinhunterseth]

I prefer dd coils. I get better target separation and they are easier to pinpoint with in my opinion.

 

[razerback408]

I prefer dd coils. I get better target separation and they are easier to pinpoint with in my opinion.

me two

 

[Mega]

Must admit i had been a DD fan for years mainly i guess because of the critical overlap discipline that is required with these coils,but in the last few years have been drifting back to using concentric coils again.The main advantages of using concentric coils is that they discriminate much better and also pinpoint so much better,i find these advantages come into play better on a very trashy site like my roman and saxon sites this is when these coils really start to shine and get in amongst the trash to the decent finds.

Also not only have i changed my coil types but also reducing the size of the coils down also makes a massive differance,i do own a fair few DD and also very alrge ones as well,they of course doo all have specific uses as no one detector/coil combination can do it all,hence the need for say 3 coils for the normal detector ie small/stock/larger this in theory will cover most deteting needs.

Concentric coils do require more discipline in specifically the coil overlap area but easily mastered,but the biggest advantage that i see using these coils is the discrimination it does seem to work much better than a DD coil,these are just my findings over the years but of course what suits one person may not suit another one.

I still use DD coils and they are good,some more so than others,this is why is good to try various combinations and find out what works best for you,

 

[NM5K]

To be honest, I've never tried a DD coil.. But being as I've been satisfied with the concentric coils I have,
never really saw a need. And the 'hot for bottle caps" issue kind of scared me off too.
With the Ace 250, I'm still using the stock 6.5x9, and the 9x12 coils, along with the sniper for the
trashy areas. I never had any trouble pinpointing with the two larger coils. Seems quite easy and
accurate to me, as long as one is careful on the side to side signal measuring when nearing the
cut off point when pulling back.

I think that is one part that throws many off from pinpointing accuracy when using the concentric
Garrett coils. The closer you get to the cut off point, the narrower the side to side signal becomes,
as the signal follows the shape of the oval coil, and it's critical to be right in the middle at the cutoff to
really be accurate, being that is the most narrow point. If one only checks the side to side when the
coil is appx over the middle widest area of the coil, and does not check again when pulling back,
that can lead to quite a bit of side to side error.
So I'm checking and tweaking side to side all the way to the cutoff point.
Most times, I can stab the object with my probe if I wanted to.
Sometimes I do.. Which is why I rounded and polished the end of my screwdriver probe to reduce
the chance of scratching coins if I do stab them. :O