What Is This Coil?

[GotAU?]

The coil this guy is using is impressive- and goes deep on large items such as for irons.
Does anyone know what it is and for what type of detector?  It looks like a basic mono to me, just curious if it’s a VLF or PI and if anyone has done this?

He also shows some impressive preparation skills for turning his finds into jewelry.

(sorry - it’s just on Facebook but I’ll try to find him on YouTube as well)

https://www.facebook.com/reel/9891757610904308?fs=e&s=TIeQ9V&fs=e&mibextid=wwXIfr&fs=e

[mn90403]

Interesting video about making rings out of meteorites.

I think he probably made that coil.

[Wild Bill]

I think this is it…

 

[GotAU?]

Thanks, Bill. And if you google that detector online, you will also find that the big coil being used is part of the package being sold with it.  I was just curious about what it was- I’m not really in an area where something like that would be more useful than a GPX with the right coils, but I could see using it for hoard searches in Europe or for known meteorite fall areas before or after an it has been thoroughly detected with detectors that are more sensitive to small targets.

[Bedrock Bob]

It looks just like the coil we made for the pulse star 20 years ago. You could wind it to get about any size coil you wanted. 

Back then the pulse star and the lorenz was what the market offered. Since then I'm sure there are other machines that have similar design. They have a length of wire you can connect in place of the factory coil. This allows you to make just about any size coil you want.

The machines worked great although the big coil frames were a hassle in the woods. Where we were hunting was mostly brushy and steep. After a few days hunting the open areas we went back to the standard coils. 

We used the big coils at Brenham Kansas with excellent results. It's open and flat terrain. No problem walking a grid and maneuvering the big frame.

In the mountains there was much less acreage to run that big frame. And while the big coil did go much deeper we rarely (if ever) located a signal that was too deep for the stock coil. The stock coils could easily go 3 feet on a baseball sized piece. On those slopes there was rarely that much fill over solid bedrock. So the extra depth was really not needed in that situation. 

Edit - The target size was greatly affected with the big coils. The stock coil would go 3 feet deep and still respond to a target the size of a dime at 6". With the 48" square coil you could find a 9 lb. hammer head at 4 1/2 feet down. But you would walk over anything smaller than a quarter on the surface. 

I'm sure you could experiment with coil size and hit a sweet spot for just about any situation. For most situations the stock coil (about 24"?) seemed to be about right.