Unforgettable experiences

Tom, have you had a chance to take the F75 back to the location "published in the 5th edition of Fisher Intelligence" where you found the coin spills in 2004?

Yes, and at approx 60' radially outward from the iron nucleus..... and further out...... the coins/targets are just simply too deep for any (current) detector. This is where I still hold a properly tuned CZ-3D with large coil.... as the trump card for final raw-depth..... but only in areas where trash is sparce.

However; I did detect the iron nail infested pit which yielded many non-ferrous targets..... with two of them being coins.

I was thinking the large coil and the CZ-3D would be about the same as the F75 stock coil

Sooo many variables; but, on average, the CZ w/8" standard/stock coil is almost exactly identical in depth performance to the F75 w/7 x 11 standard/stock coil on dime/penny sized targets. A properly tuned CZ with the larger 10.5" coil will trump the F75 by a fair margin on dime-sized targets. The ground must be fairly sans/clean.

Now....... changing the parameters; LOW CONDUCTORS..... especially smaller targets, , , like U.S. one-dollar gold coins, buttons, pewter, buckshot, 3-Cent nickels, percussion caps etc......... The F75 will trump the CZ.

ALSO; due to the inherent design of the F75 elliptical DD coil EM footprint.... the "SEE BETWEEN" targets ability is tremendously excentuated... compared to the bull-in-the-china-shop concentric coil footprint. For example; say you have a pair of soda tabs. They are both at 4" deep...... and separated from each other by ..... say..... 12". Now.... exactly between these two soda tabs... you have a silver dime at a differing depth; say 9" depth. ---- A concentric coil does not have a chance. The DD coil will see all three targets....... yes, including the deeper silver dime. Once again, this is DEPTH vs. EFFECTIVE DEPTH --- (concentric vs. elliptical DD).

In greater detail all of this is in Fisher Intelligence "Coil Size Myths".

Tom

Thanks, Tom