My response is that I keep a 7" Concentric coil mounted full-time to my Nokta Impact and one attached almost permanently to my Makro Racer 2. This is exactly the search coil I have asked for, literally, since I got my first FORS CoRe and then original Racer in my hands in early 2015. I hoped for one when the Relic and Racer 2 came out to start 2016. January of 2017 saw the Impact arrive ... but it, also, came without a functional-size Concentric coil. I pleaded my case again in late March a year ago that I really would like to see a Concentric coil for these models in the 6" to 7" diameter size to complement the smaller
'OOR' and 5" DD coils.
July 28th of last year
Dilek announces the 7" Concentric coils for the Impact and Racer 2 and I was
almost extremely happy. Oh, I was very pleased, indeed, because with the 7" Concentric on my Racer 2 as well as on the Impact, it improved the all-around general purpose performance for me of each of these detectors. I would have been extremely pleased to have a 7" Concentric for my CoRe and one for my Relic as well. Unfortunately, progress intervened and making new coils for those two models wasn't a good 'fit' for the apparent direction Nokta and Makro were gearing up for their future.
For every-day hunting, my Racer 2 ... [size=small]
which is one of my two always-in-the-vehicle detector travel companions for any immediate need when I chance upon a potential site to hunt[/size] ...and Impact use the 7" Concentric coil. Wh3en I get into especially dense iron debris sites and want a smaller size coil, I do have the 5" DD coils on lower rods for these models, but instead I just grab my main-use Relic w/5" DD or CoRe w/
'OOR' DD as they are already set up for those environments.
If you get a 7" Concentric mounted on your Racer 2, and you hunt with it over several days to a week's time in all the typical site conditions you normally search, I think you will reach the same conclusion Gregg and I and many others have since that coil's release. It is about 'the best' general-purpose search coil you could own. Handles more 'average' trashy conditions well, and provides me very acceptable depth-of-detection when needed. Balance is very comfortable as well.
It's only mid-March so I'd encourage you to get your 7" Concentric coil ordered as soon as possible to be ready for a season full of hunting in 2018.
Monte