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GROUND BALANCE PROCEDURE - Continued

If the sound was getting louder as you approached the ground, begin turning the Coarse control to the left or counterclockwise. If the

sound was getting louder as you came up from the ground, begin turning the Coarse control to the right or clockwise. As you pump

the loop and tum the control in the appropriate direction, you will ultimately find that the sound will not appear to change much in

either direction. At this point, the ground balance has been achieved in a rough sort of way.

Actually, you will note that if you continue to tum the Coarse control, you will over shoot the point of balance (no sound change), and

start to create an increase in the opposite direction. The trick is to stop just short of balance and go on to the Fine control. This Coarse

control is really just intended to get the ground balance in the ball-park. It will probably only need to be adjusted once for a particular

area. That is, unless the ground mineralization changes dramatically from one spot to another.

You will now go to the G .E.B. Fine control and roll the small dial with the side of your forefinger, either right or left (clockwise or

counterclockwise) to correct the sound just as you did with the Coarse control. Remember, if the sound increased as you approached

the ground, roll the Fine control knob to the left or counterclockwise. If the sound seems to increase as you pull the loop up from the

ground, just roll the knob to the right or clockwise. You will soon get used to this pumping action and become quite adept at quickly

determining whether or not the sound is increasing on the up or the down pump. Ultimately, you will find that the sound will not

appear to change in either direction. At this point the detector is tuned. However, I recommend that a very slight increase should be

maintained when the loop approaches the ground. This slight over-tuning for the ground will actually enhance the signal from tiny or

deep nuggets. On the other hand, often small BB size hot rocks, which tend to mimic the way small nuggets sound, can often be

eliminated by under ground balancing.

Note that the G.E.B Fine control is a double stacked knob. The larger knob is intermediate, neither coarse nor fine. This intermediate

knob follows automatically any adjustment of the smaller Fine knob. You will probably use this Fine control very often during the

process of prospecting. The frequency of its use will be determined by how much the ground changes from place to place while you

search. You will soon get used to the level of hum that is achieved when you get to a proper ground balance, and when it begins to

vary you will automatically make small corrections with the Fine control. ·

The SAT mode will actually correct the minor variances in the threshold hum caused by the changes in the ground mineralization.

These changes may be more dramatic in some area-; making the VARI - SAT desirable. Very large changes in the ground must be

corrected by adjusting the G.E.B. Coarse or G.E.B. Fine controls. In extreme ground the G.E.B. Coarse control will often be used,



instead of the G.E.B. Fine, to update the ground balance during searching. However, in most areas the G.E.B. Fine control is used to

periodically update the ground balance setting.

GROUND BALANCE

(Low Mineral Conditions)

The Goldmaster V I SAT is designed to work in an environment of heavy iron mineralization. In some instances however, there may

be so little iron mineralization that the loop will never go null or blank when it is lowered to the ground. In other words, there always

seems to be a faint hum when the loop is lowered to the ground. Turning the Coarse Ground Balance control fully counterclockwise

doesn't change the picture. In this instance, merely set the ground balance knobs to the midpoint or at 12 o'clock and hunt. Any slight

changes should be able to be corrected with the Fine Tune control.

VARI- SAT I GAIN

If the threshold becomes too erratic or noisy, it might be necessary to use the VARI - SAT feature and or reduce the GAIN control.

This noisy behavior will make it difficult to recognize a true target (possible nugget) from pieces of mineral, commonly referred to as

"hot rocks". It is not wise to keep a high level of GAIN if the detector will not operate smoothly. This is a false sense of security.

Recognizing a real target is the most important part of detecting. This is an example of when less GAIN will produce more nuggets.

You must be the best judge of just how much noise you can tolerate and still identify nuggets, as well as the combination of VARI -

SAT and GAIN which produces the desired results in your area. Some real Pro's can work at levels intolerable to the rest of us,

because they have trained their ears over the years. Tiny hot rocks are not the only culprits. Alkali salt flats, in the desert, can also

cause erratic behavior and require faster VARI - SAT settings or reduced levels of GAIN, or both, to handle such very extreme

conditions. Remember, whenever you change the level of GAIN, correct the ground balance. Wet alkali wa'ihes can be extremely

difficult to work due to the sensitivity of high frequency gold detectors to dissolved salt.

VARI - SAT I GAIN Continued

In some instances, pinpointing is easily performed by merely "X"ing or crisscrossing. The loudest part of the target will be under the

center of the loop, just as with any detector. After the approximate location of the target is determined, take a handful of soil and

check the hole again. Continue this process until the target is no longer in the hole, but in the hand. I prefer putting the handful of soil

in a plastic container (pan, tray, cup, or scoop). Passing the container over the loop will determine if the target is really in it. If so, a

series of separations will quickly expose the target. Some prefer to pass the handful of dirt across the loop directly. Caution must be

exercised if this is done. The GOLDMASTER V I SAT is sensitive enough to pick up the salt in your hand and respond with a signal.

Try this with nothing in your hand and you will see how close you can come to the loop using this method. One way around this salt

sensitivity is to pinch the soil in small amounts and wave only the fingers over the loop. You will find the way best suited to your

needs. The condition of the soil - dry, wet, fine, coarse, etc. will have a lot to do with the best method for you. Until you get good at

eye-balling the target in the SAT mode, you can switch the mode toggle to PP and locate the loudest sound, thus indicating the center

of the target. Remember to switch the toggle back to SAT mode when you continue to search.

SEARCHING

Once you have achieved the initial ground balance, you are ready to start searching. As I mentioned before, I recommend using the

SAT mode of searching. Move the loop just over the ground and listen for the distinct zip-zip sound produced by a target. It is wise

to plant a nugget just under the soil to practice on in order to learn to recognize what it will sound like. If you don't have a nugget, use

a nickel or piece of lead (sinker or bullet). You can practice with different sized nuggets and at different depth. This is the part that I

cannot help you much with. It will take practice to determine the proper search speed and technique. Do not go too fast. Try to

overlap your sweep path so that you won't miss the tiny and deeper nuggets. When you hear the zip-zip, make an X over the loudest

portion and eyeball the center. If you have a hard time finding the center, you can switch to the PP setting and try to pinpoint it. Don't

forget to put the toggle back to the SAT setting before resuming searching. At first, I recommend that you dig all targets, until you get

used to the sound of various items. As with other G.E.B. detectors, a nail or oblong piece of iron laying horizontally will produce a

double beep. You will learn to recognize this. Remember now, a "good target" is considered anything that is not IRON. You want to

detect lead, brass, copper, aluminum and silver. Any of these metals can simulate the sound of a gold nugget and must be dug. Keep

a particular lookout for the tiny lead bird-shot so common in mining areas. If you are detecting these tiny targets, you are doing

everything right.


Date: 2015-12-24; view: 821


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