20
17
9
.
Avoid hunting in the DISC mode unless the area is so littered
with ferrous trash that it is impossible to hunt in any other way.
The DISC mode will cause your GoldBug2 to ignore ferrous
objects and hot rocks, but it may also cause you to miss
small gold nuggets. We recommend that you hunt in either the
NORMAL or BOOST modes, and switch to the DISC mode to
check a target
that has already been dug. Targets often come
out of the ground
covered with dirt, and it is impossible to tell
if they are ferrous or gold. The DISC mode, however, will ignore
most hot rocks and small ferrous objects while responding to
gold and other nonferrous metals.
10
.
You can also use the DISC mode to identify many buried
targets that produce a good, strong signal. Once you have
zeroed in on a target, switch to DISC and pass the coil over
it. If you still get a response, dig it.
NOTE: Keep in mind that the DISC mode is not 100% accurate. Small
and/or deep nuggets giving faint target responses will often be ignored in
the DISC mode. Conversely, large iron objects, like a railroad spike, may
produce a good signal in the DISC mode. Remember, when in doubt, dig!
SEARCHING (continued)
3
.
Your objective now is to adjust the GROUND REJECT control
so that there is no change in the sound, a very small change
in the threshold hum as you bob the coil up and down. Start
by setting Ground Reject to 75.
4
.
Bob the searchcoil up and down once again. One of three
things will happen to your threshold hum:
1)
The tone will continue to get louder as you lower the coil
and disappear when you raise it.
2)
The tone will disappear as you lower the coil and get louder
as you raise it.
3)
The tone will remain the same or change only slightly while
bobbing the coil.
5
.
If the tone remains unchanged or changes only slightly, you
are properly “Ground Balanced.” Fine tune with one click at
a time.
6
.
If the tone gets louder lowering the coil and fades raising the
coil, continue rotating the knob counterclockwise until the tone
change is minimal when you bob the coil.
7
.
If the tone fades lowering the coil, and increases when raising
the coil, rotate the knob clockwise until the tone change is
minimal; then fine tune with just one click at a time.
8
.
With practice, you will learn to click the knob counterclockwise
as you bob the coil. Listen for the change in the tone to switch
from the down-stroke to the up-stroke. Then, while continuing
to bob the coil, rotate the knob clockwise until the tone
becomes even or until you hear only a slight change on both
the up-stroke and the down-stroke.
9
.
If you are having trouble ground balancing, try one or more
of the following:
1)
Move to another spot because you may be over a piece
of buried metal.
2)
Reduce the SENSITIVITY.
3)
Change your MINERALIZATION setting from LOW to
NORMAL or from NORMAL to HIGH.
GROUND REJECT PROCEDURE (continued)
