Mode And Mineralization Switch Selection - Fisher GOLD BUG-2 Operating Manual

MOde and MIneRalIZaTIOn sWITCH seleCTIOn

The chart below shows how your Gold Bug™-2's sensitivity and
ability to operate in mineralized soil is affected by each combination of
MINERALIZATION and MODE toggle-switch settings.
LOW
High
MIN.
Mode switch
Sensitivity
in auto boost
Low
Ability to work in Miner
Poor
Figure 7.
In either the AUDIO BOOST or NORMAL MODE, the Gold Bug™-2's
sensitivity decreases as you increase MINERALIZATION settings from
LOW to HIGH.
MineraliZatiOn SWitCH
In general, you should start searching with the MINERALIZATION
switch set to LOW. If you are getting too much "ground chatter" even
after adjusting the GROUND REJECT in the LOW MINERALIZATION
Mode, try reducing the sensitivity slightly or set the MINERALIZATION
switch to NORMAL. If that doesn't do the trick, set the MINERALIZATION
to HIGH and readjust the GROUND REJECT control. If there is still to
much "ground chatter," reduce the SENSITIVITY .
In the LOW MINERALIZATION setting, the searchcoil response (retune
speed) is slow and the circuit gain (amplification) is high. In the NORMAL
MINERALIZATION setting, searchcoil response is quick and the circuit
gain is reduced slightly. In the HIGH setting, response is quick and the
gain is further reduced.
Moist, alkali soil conditions will usually require use of the NORMAL
or HIGH MINERALIZATION settings. Heavy, black sand conditions will
usually require the HIGH MINERALIZATION setting.
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LOW
MIN.
Mode switch
in normal
NORM
MIN.
NORM
MIN.
HI
MIN.
HI
MIN.
Mineralized soil
Good
TARGET RECOVERY (continued)
2. Your digging tool should be selected for the type of soil you're
in. Most nuggets are found in hard, dry, rocky ground, so a small
pick axe is first choice for most electronic prospectors. Always
carry a small magnet to determine if your target is just a nail or
some other ferrous object. A ferrous object will stick to the magnet,
whereas a gold nugget will not.
3. Once your target has been pinpointed by crisscrossing the target
area with your searchcoil, lay your Gold Bug™-2 so that the
searchcoil is within easy reach but not close enough to detect
your digging tool as you dig.
4. If the target sounds large (a loud, sharp sound), grab a handful
of dirt that you suspect holds the target and pass your hand in
front of the searchcoil. If you don't hear a signal, discard the
dirt and pick up another, repeating the process until you hear a
signal. If the target is large, you can probably find it by searching
your hand.
NOTE: Because of the extreme sensitivity of the Gold Bug™-2 searchcoil,
the electrical charge of your hand may be picked up as a target. Sounds
incredible, but it's true. Therefore, if you pinpoint a target and it sounds
small, don't try to identify it by passing a handful of dirt in front of the
searchcoil. The signal you hear may be your hand. Instead, use the
sprinkle method. Test the sensitivity of your Gold Bug™-2 to your hand
by waving your empty hand in front of the searchcoil. If it's a large target,
you may use your hand. The loud signal from a large target will mask
any signal produced by your hand.
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