Instruction manual
Coil Applications
47
9-Inch 7.5 kHz Concentric Coil
The stock 9-inch 7.5 kHz Concentric coil is an excellent “all-around” coil.
It is good for coin shooting, relic hunting and general detecting. It oers
excellent depth in moderately mineralized soils. And, it provides excellent
target response on targets of all conductive levels. So, if you’ve only got
the 9-inch Concentric at 7.5 kHz, don’t feel you have to run out and buy
more coils. However, I believe the 9-inch Concentric coil at 3 kHz provides
more audio information for the types of targets I hunt, and the places I
hunt them.
I may not be a typical coin shooter in that I like to hunt in All Metal, with
multiple tones. Actually, I usually hunt in a Discrimination Pattern without
any notch segments rejected, as in zero-discrimination. I didn’t always
hunt like this. But I have proven to myself that I was missing targets
by not hearing everything that passed under the coil. For example, if
I am running a Discrimination Pattern that rejects ferrous targets, the
detector will blank out every time the coil passes over one of them. Then
if there happens to be a coin laying between two nails, I am more likely
to miss it (target masking) when the Threshold blanks out on both nails,
as opposed to the Threshold being replaced by the low tone of a nail,
followed by the high tone of the coin, followed by another low tone nail.
Understanding your X-TERRA - Coils