Preferred frequency?

[Knipper]

Any thoughts on the preferred coil frequency for primarily hunting coins?

Thanks!

Knipper

 

[detectingMO]

my favorite overall is the 10.5" 7.5khz

 

[Mark in S.E. IA]

I only use the 10.5 DD 7.5khz coil and I pretty much only hunt for old coins. The DD type coil works best in the hot soil I have a round here.

 

[morelic55]

I use 10.5DD's, both the MF & HF and get pretty much the same results with the HF being a little hotter on brass and smaller targets,,,,,Mark

 

[brgordon17]

I have the elliptical and 6 inch 18 kHz coils and they do great on coins.

 

[kevmar]

my favorite overall is the 10.5" 7.5khz

Agreed.

 

[pierre87]

The 7,5 KHz is a real vacuum cleaner and i finish with the 18,5 KHz, i think they are complementary. The HF takes better the coins sitting on they edge and the very little ones like the roman (1cm) or the 1 centime Napoleon III (15mm in good state). Don't forget the HF are the best for a plough land.

 

[Venner]

I have the 3khz DD 6" Digger and the 18.75khz DD 10x5" Elliptical for my 705. The HF coil works fine, but I love the 3khz coil. The main difference to my ears is how much harder it hits on silver and copper coins. I have yet to find any gold coins with either coil, so can't compare there.

 

[Old Longhair]

Here's a link to a thread that may be of interest. If nothing else you can probably gather my preference from it.

http://www.findmall.com/read.php?55,1984195,1984234#msg-1984234

 

[Johnp3]

I have the 3khz DD 6" Digger and the 18.75khz DD 10x5" Elliptical for my 705. The HF coil works fine, but I love the 3khz coil. The main difference to my ears is how much harder it hits on silver and copper coins. I have yet to find any gold coins with either coil, so can't compare there.

I have the same setup as Venner, same two coils. I like 3k a lot and am considering the Coiltek WOT 15" as a third coil to cover more real estate in large areas, but I also like the 9" concentric because it's water proof and not as unwieldy in water. OLH's post is spot on as usual, and the takeaway for me when I read this some time ago is that they all find metal, it's just that the emphasis of different frequencies is different. For instance, I found a cheap little gold earring pretty deep with my Digger, and constantly find smallish iron pieces at fairly deep depths with it. The difference for me is the Digger emphasizes higher conductivity coins so much that there is almost no mistaking when I'm over one. I chose not to agonize over depth differences and go with the freq that suited the targets I like to hunt. I never felt like I was missing anything with my HF DD as I've pulled can bits out of the ground at ridiculously deep depths with it.