coils

[charliev]

just bought garrett ace 350. Do you gain any depth by going to larger coil? And is it pratical when coin hunting in parks?

 

[Hank68]

Yes bigger coils do have in generally better depth and coverage, but in parks I hunt with the sniper coil, for better target separation on my 350.

 

[charliev]

Thanks for input.

 

[NM5K]

The size of the coils and the depth performance are fairly linear. And you can note
the dimensions of the coil, and guestimate how deep it should go, assuming it's tuned
and working properly.
So take the stock 6.5x9 coil fer instance.. That's an overall average of about 7.5-8 inches or
so.. And that's about the depth limit with one of those coils on a coin size object.
Then take the larger 9x12 Garrett coil, which is exactly the same as the stock coil, just bigger.
That's about an average of 10.5-11 inches or so, and that is the usual depth limit for it.
So you can expect to see 2-3 inches more depth with the 9x12, vs the 6.5x9 coil.
The sniper is about 4 inches or so, but it actually breaks the rules a tad, and does better
than what you would expect for it's size. They can detect coins down to 5-6 inches if all
is well in the world. I think maybe from a tight dense pattern..

Anyway, you can guestimate the depth performance pretty close just calculating from the
size differences. On the larger coils, it comes out pretty close.
With my 250, I have the three stock coils.. IE: sniper, 6.5x9, and the 9x12.
I use all of them, which, just depending on the site and ground conditions, etc..
In dense woods, I'll often prefer the stock coil over the 9x12 just because it's harder to swing
the larger coil in tight areas with lots of trees, stumps, etc..
But if it's open, I'll slap the 9x12 on. The sniper coil is a hoot for trashy areas, and a fun coil to
use overall. Being small, it's fast.. You can pick out the goodies, pop, pop, pop..