Now for some real fun! Let's take our Tracker detector and a small digging
trowel outside and find some coins. If you have a yard, we'll start there. If
you do not have a yard, we'll practice in the nearest park.
We'll first operate the unit with the Sensitivity control turned three-quarters
of a turn and our Discrimination control also turned three-quarters of a
turn. We will not dig any pull tabs if we only dig the high tones that are
emitted. (Tracker III or IV users: place your toggle switch in the right
position along with these specified settings).
Slowly sweep the coil from left to right in a half circle. Take another step
and do the same. We are not going to dig a target until we get a repeatable
high tone. Oh, you have one already? Great, let's dig and see what we've
got! Is it your first coin? Don't be disappointed if it's not. You will find
other strange pieces of metal besides coins if you're digging your high
tones such as: brass, copper tubing, pipe fittings, etc. If you detect a can, it
is usually because of the oxidation that occurs when metal has been buried
for many years. This creates a "halo effect" and will not allow any detector
to bypass it. Usually after you dig something like this, you can put it on
top of the ground and the detector will not emit a positive tone any longer.
This is the best way to tell if a piece of metal had oxidized. There are rusty
iron objects and cans that will, even then, still emit a high tone.
Pinpointing
Let's keep sweeping the coil and learn how to pinpoint a target. As you
sweep the coil in the half-circle format, you'll notice that sometimes you'll
get a tone that seems to disappear. These are usually best ignored. If you
cannot achieve a repeatable signal after waving the coil over the same spot
a few times, it is most likely trash. If you do achieve a repeatable signal, it
is time to learn how to pinpoint your target. Take your coil and sweep it at
angles over the same spot as if you were drawing an "X". This will assist
you in isolating your target to determine the exact spot to dig in without
having to dig unnecessarily. Take your spade and draw a small circle
around the exact area that you think the target is in.
Now, dig in and see if you have learned to pinpoint your target properly.
As you dig, carefully pile the dirt to the side of the hole. Periodically,
check the hole to see if you're still getting a signal and that it is still
centered and not to the right or left of the hole.
(41 Seiten)
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