PI and the 40" loop

[landman]

Any one ever use a PI with a 40" loop? What are the options for such a beast? I don't necessarily trust KellyCo's outside of their mainstream detectors because of the longrange detectors they offer. It just brings the skepticism out of me. Too bad Foster's machines did not offer this size for the Deep Star.

 

[Mr.Bill]

What would be the need for such size ??

Perhaps in underwater research looking for sunken ships with their heavy cannons. I know Eric Foster made a few like this for Mel Fisher. They were submerged, and towed behind a boat.

Certainly it's not very piratical for land use.

Gee wiz, the Deepstar with a 11" loop will hit on the top of a Campbell's soup can at over 40". I have never tried it with larger coils. Depth for deep caches with this unit is not a problem. If you require a ID'ing PI, Goldscan 5 is the one.

Depth is not a problem for a modern high powered PI detector. I doubt that the one's that are powered by a 9 volt cell would qualify in this area.

 

[caliehunter]

I have a pulse star pro 2 with bothe a 40'' loop and a 18'' coil . The 40'' loop alows you to cover a lot of ground fast and can be raised 6-8'' above the ground to ignore most trash in the ground.It has a depth range of over 6 to 10 feet depending on the size of the target. The 18'' coil can hit a glass quart jar of coins 48 to 58'' or a metal lid sized target at that depth.Be aware of claims that are air test as they do not represent what really happens in the ground.I have been a cache hunter for over 15 years and after hearing all the claims out there i put in a test field of my own to find the truth out about depth capabilities.My test field is listed on the P.I. forum and has over 32 burried targets ranging from 14'' deep to 66'' deep and over 16 different types of burried targets.there are a lot of claims out there but the proof is in the actual testing.The reason a person needs to go 3 to 5 feet deep is because targets can be that deep under certain conditions. my site is called field test on the P.I. forum and is open to any detectorist who wants to know their real depth capabilities at no charge. GOOD HUNTING Caliehunter

 

[Mr.Bill]

Thank you for enlightening me as to "why".

With the 11' coil on the can cover at over 40" with the Deepstar, it was in the ground.

I have done a bit of use with a 18" Nugget Finder coil on the GS5 with small pieces,(15 to 25 grains) of gold. There was no problem locating them at 12" or so.

Those that are using the Minelab series GP can also attest to the deep ranges they get with very large coils on their GP's. I'm sure if they were being used for deep cache hunting with them, they would not be a problem obtaining the ranges you mentioned.