bibelot said:
I'm running the stock brown 8" coil now but I just ordered a 4" concentric. Turning the sensitivity at 2-3 helps stabilize it's readings but I'm dealing with 196 years worth of trash in the ground. I think the 4" will work better but maybe not. Thanks for the tip, I 'll give it a shot. I have so much to learn, it ain't funny.
I have a 4" but haven't had the need to run it yet.
As long as you understand concentric and know how little ground they cover to begin with. The overlap on any concentric needs to be at least 50% the width of the coil but many times more.
I've never had trash that's busy.
For example, to cover ALL the ground on your sweeps... with an 8" coil, as far as coin size targets, you can only sweep 2-4" ahead of the center of your last sweep to get everything and still with concentric and their cone shaped "sight" even then you could be missing things.
My sites are mine alone and no one else hunts them, so I don't mind and often go back over and find more. It's not an issue with the detector I used last, just an issue with how I was swinging.
If you look up concentric and their "sight" into the ground compared to DD (blade) "sight" you'll understand.
Not to say one is better than the other, just different.
Concentric are all I have for my resorts for the way I hunt with them.
They are waaay better for discrimination (not to be confused with separation) of targets.
I have the 4" in case it ever get that "busy" in the ground but have yet to run into anything my 5.75 concentric can't handle.
The SD (widescan for Tesoro) are great for mineralized ground and separation. I want the 5x10 (called 10" elliptical, lobo) coil because I love it's coverage (10") per sweep but it's separation (5") width. Works great in my Nokta with that style coil.