White’s Electronics MXT Pro - Manual (Page 29)

2
Pinpoint Technique-
Due to the wide scan nature of modern search coils it can
be difficult to locate small targets under the physical center
of the loop. Use an “X” marks the spot technique as shown
in the diagram to identify the portion of ground the metal
target is in. Prospecting for small nuggets, because small
metal targets are more difficult to isolate to an exact location
compared to coin or relic hunting, may require removing the
soil under the center of the “X” until the target is no longer in
the hole, but in your pile of dirt.
Again, the procedure is to sweep over the target from side-
to-side noting the side-to-side center. Then turn 90 degrees
and sweep the coil side-to-side noting the center from this
new direction. “X” marks the spot that you need to dig. You
can practice with a coin or small pieces of lead or gold on
top of the ground to become acquainted with the technique.
During Prospecting it is a good idea to have a magnet
handy, preferably in the handle of your digging pick, to pull
iron out of the dirt pile. It will speed up your recovery time. It
will work on small almost invisible iron rocks as well.
Accessory “DD” search coils (recommended for extreme
ground mineral areas and/or prospecting with the MXT Pro)
pinpoint significantly different than the standard equipment
traditional concentric search coil. Standard equipment
concentric search coils tend to center to a round spot close
to their physical center. “DD” search coils will center along
a line running front to back. Using a “DD” accessory search
coil the most isolated pinpoint is achieved side-to-side. By
using this side-to-side pinpoint on one plane, say east to
west, then, turning and again using this side-to-side north to
south, pinpointing with a “DD” search coil can be as accurate
as a concentric. With a “DD” accessory search coil pinpoint-
ing in more of a “+” is far better than “x”. Center side-to-
side, then turn 90 degrees and center side-to-side.
Chapter MXT Pro Pinpoint Technique
Pinpointing
NOTE: Turn the detector 90° to the first side-to-side loop
movement and repeat for “+”ing the center.