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DESCRIPTION OF CONTROL PANEL

Starting from the lower left-hand corner of the control panel and proceeding counterclockwise, here is a description of each control in

detail and explanation of what it does and why it is used.

Headphone Jack

The headphone jack on the Goldmaster V I SAT is wired to receive a stereo plug from a headphone. Since most high quality headphones

preferred by prospectors are wired with stereo plugs, White's has choose this method of wiring. If you already have a set of

headphones which you prefer, merely be sure that the plug is either wired stereo or you have a switch on the headphone which can be

used to go from mono to stereo. White's Pro Headphone is an example of this type. If you have a mono headphone with no switch, an

adapter plug can be purchased which will do the job. Use of improper wiring will merely prevent the sound from coming out of one

earphone. Another important consideration in choosing a headphone is to get one that has a volume control on it. Since there is no

volume control on the Goldmaster VI SAT, it is essential for hearing comfort and safety to utilize a headphone with these controls. It

is important to set the headphone volume to accept a very faint threshold hum from the detector (set with the THRESHOLD CONTROL)

and yet produce a strong but comfortable signal when a target is detected.

The use of headphones is highly recommended. First of all, they keep the external sounds out of the way. Other people talking, wind

blowing, and various sounds distract the prospector from the immediate task of detecting the tiny signals from either small or deep

targets. Most true professional prospectors and treasure hunters use headphones. The beeping of a detector can also be very distracting

to those around you.

Headphones also allow the detector to be operated at a lower threshold making it more sensitive to smaller signals. Faint signals are

better heard with headphones than without. Use of headphones also increases battery life.

GEB Coarse and GEB Fine Controls

2 8

0 10

G.E.B. COARSE

1:1

G.E.B. FINE

40:1~

4:1..

The next two control knobs are used in conjunction with each other and are designed to cancel or

neutralize the iron or ground mineralization. Ground mineralization has always been the main

stumbling block in the use of a metal detector for electronic prospecting. Years ago, very few

nuggets were ever found with a metal detector unless they were quite large or very shallow. This

is because the heavy mineralization present blocked out the old TR detectors. The advent of the

GEB or ground cancelling detectors in the late 1970's opened the door to electronic prospecting.

The ground balance controls or "pots" are used to cancel this mineralization blocking. The

farther clockwise they are adjusted, the more ground they will cancel. However, neither over or

under ground balancing is desired, but achieving a proper balance of the ground is the desired



goal.

The purpose of the two (2) ground balance pots is to achieve this balance in the smoothest and

most complete way. The range of the ground balance control is very important and the

Goldmaster VI SAT has a large range. By that we mean that it can balance a broad range of

mineralization. The ease with which we can accomplish this balancing is directly related to the

degree of resolution the pots have. This rs usually measured by describing how may times the

knob rotates in relation to a ·run turn of the pot itself. For example, if the knob rotates 10 times

while the pot makes one full turn, it is referred to as a "ten-turn pot". The more times the knob

can turn while the pot makes its revolution, the greater is the resolution of the control knob and

the easier it will be to control the bad ground and accommodate its changes from place to place.

By using two controls White's has expanded the "ten turn" capability of the GEB Fine Control to

that of a "forty turn" pot. Therefore, each ten turns of the Fine GEB knob controls approximately

25% or 1/4 of the range of the Coarse GEB knob, giving us a 40: 1 ratio. All of this amounts to

giving us better and smoother control of bad ground conditions by first getting into the range

with the Coarse control and then applying the resolution of the Fine control.

GAIN

..---------~

This knob controls the GAIN of the Goldmaster VI SAT and functions as an ON and OFF switch as well.

Starting from the ON/OFF position and going clockwise, the Goldmaster VI SAT power is turned on and

the dial increases the GAIN from a level of "1" to a maximum level of "10". When first turned on, the

battery condition automatically shows on the meter and it takes a few seconds for the detector to be

operational. This and the ground balance controls are probably the most important variable controls on any

gold prospecting detector. The first assumption of any novice might be that the greatest depth of detection

is directly related to the amount of GAIN. The inaccuracy of this assumption is indirectly proportioned to

the amount of mineralization in the ground.

In other words, it is very important to remember that reducing the GAIN of the detector can actually

increase the depth of detection if the ground is heavily mineralized. This control should be set to give the

--------.. greatest amount of GAIN without (1) overloading the loop and (2) causing an erratic or unstable behavior

of the detector. If the loop is overloading when placed near the ground, the audio threshold will emit a loud

piercing squeal. Reducing the GAIN by turning the control counterclockwise will eliminate this. Unstable behavior will be evidenced

by static, very uneven threshold or constant false signaling, making it impossible to search and hear actual targets. Thus remember,

there is a proper workable GAIN for every condition, and choosing the proper level will insure the maximum depth that targets can be

detected in that particular environment.

MODE Control

RES~AT

P/P

The next control is a toggle switch located just above the GAIN knob. This control is on-marked except

for the functions of the three positions. These three positions designate the operational mode of the

Goldmaster VI SAT. SAT (Self Adjusting Threshold) is the preferred mode of operation and is

activated with the toggle moved to the position to the right marked SAT. With the toggle in this

position, the Goldmaster VI SAT will emit an audible signal when passed over any metal object, but

requires motion of the loop to generate the signal. If the loop is stopped over the metal target, the sound

of the signal will stop and the threshold hum will return. This "Motion Mode" is the method used by

serious prospectors and will accommodate most ground conditions even with increased levels of GAIN.

When used in this mode of operation, the Goldmaster V I SAT will not drift from changes in ground

mineralization.

SAT - Is the most used mode of operation on the Goldmaster VI SAT. It is used during tuning, and during searching. With some

practice SAT can also be used for pinpointing thus, many Pros leave the mode toggle in SAT continuously. In the SAT mode the

Goldmaster V I SAT is continually resetting its own threshold thus a fairly brisk sweep of the loop is required to respond to small

gold nuggets. Always use the SAT mode when attempting to ground balance the Goldmaster VI SAT. This SAT position must

also be used to activate the VARI SAT control used to custom tailor SAT Speed for a given condition. We will discuss the VARI

SAT control later in this manual.

PIP - The center or P/P (pinpoint) position of the toggle will give a larger and broader signal when the loop is swept over a metal

target, giving some indication as to the relative size of the target. Primarily a pinpointing mode, the PIP position will allow an

operator to sweep the loop much slower than the SAT position and still respond to metal. If however, the loop is held stationary over

a target for more than a few seconds, the instrument will cease to respond and the threshold hum will return. Some slight loop motion

is needed for the P/P mode to continue to function. The PP position offers the slowest loop sweep speed available with the

Goldmaster V I SAT. However, this mode is rarely used for searching (not generally recommended). In the PP mode ground variations,

especially Hot Rocks, will be heard as broad changes in the threshold. Pressing to Reset and releasing will reset the threshold.

RESET - The RESET position is spring loaded and will return to PP if released. If searching in PP and the threshold varies (due to

ground changes or hot rocks) simply press to RESET and release to reset the threshold. Hot Rocks may produce an excessively long

audio response while operating in PP, which can be reduced by flipping to reset and releasing. It may be necessary to hold the toggle

in RESET to search the area near a hot rock. If held in RESET a fast SAT Speed is activated however, not as fast as Variable SAT

offers.

MODE CONTROL SUMMARY

Use the SAT position when setting the GAIN, THRESHOLD, and GEB controls, as well as for general searching conditions. Use PP

if additional assistance is needed in pinpointing a target's precise location, as well as for searching areas of very minimal mineralization

when a slow loop sweep speed is desired. If the VARIABLE SAT control is to be used the toggle must be in the SAT

~~ 6

THRESHOLD Control

TURN

THRESHOLD

The next control is in the upper right hand corner of the control panel and is designated "TIIRESHOLD".

It is used to set the level of the threshold hum which is maintained constantly while the detector is in

operation. The threshold or background hum is set to the faintest comfortable level. This will allow the

tiniest and deepest targets to be heard. Set the knob all the way to the left and rotate clockwise till the

proper level of hum is attained.

As previously stated, the THRESHOLD should be set to the EDGE of RESPONSE. This is usually

described as a faint hum, or threshold. It should be mentioned that there is usually some internal hum

present which should not be confused with the threshold. This is most evident when using headphones,

and particularly high impedance high quality headphones. If a faint internal hum is noticed when the

TIIRESHOLD is at the full counterclockwise position (all the way to the left), then one should turn the

TIIRESHOLD clockwise until this faint hum increases slightly. The TIIRESHOLD will then be on the

edge of sound. At this setting, the sensitivity of the detector is at its best. Be aware of this level of hum and keep the THRESHOLD

tuned to it. If the hum drops below this edge, significant loss of depth will be experienced, particularly on very small targets.

The GOLDMASTER V I SAT utilizes a ten turn Threshold control. This means that the control turns ten full turns between minimum

and maximum. Because of this it is not obvious where the level is set at any one time. Initially start by turning the THRESHOLD

control fully counterclockwise. Then turn the TIIRESHOLD clockwise until the edge of sound is located, then fine. tune the THRESHOLD

by turning the THRESHOLD control in either direction until a very slight hum is achieved.

IRON l.D. Control

TES~N

OFF

IRON l.D.

The next control IRON I.D. is located to the left of the TIIRESHOLD control, and is the toggle switch

which activates the iron identification function. There are three positions for this toggle. The center

position is marked as " OFF", and should be selected during all GAIN, THRESHOLD, and GEB tuning.

In the OFF position, the detector is functioning as any all-metal detector would. It gives a positive signal

when passed over any metal target, regardless of the type of metal. This would be the normal position of

the switch during the general operation of the detector. The left position is marked "TEST" and is a spring

loaded position If the toggle is pressed toward this position, the iron identification function will be

activated and remain activated as long as the toggle is held in that position. When the toggle is released, it

will spring back to the center "OFF" position. If the toggle is moved to the right position - marked "ON", the iron identification

function will be activated constantly. The toggle will remain in this position until it is physically moved to the center or "OFF"

position. If ground conditions will allow, the detector can be operated in the "ON" position continually. The user will know if this

can be done only by experimenting to see if the detector can be operated smoothly and whether it will detect and correctly identify test

targets.

This iron identification function is unique to the Goldmaster VI SAT. When activated, it is designed to modify or eliminate the audio

signal of iron targets, and produce an indication in the IRON area of the meter. This modification of the audio signal is evidenced by

a chattering or breaking up of the target sound. Normally nuggets produce a clear or steady signal and do not cause the needle on the

meter to move. The audio signal from iron can sometimes appear to "null out" or disappear. If the signal is not understood as Iron by

the detector, the signal will remain normal or steady.

By design, if the identification circuitry is not able to determine if the signal is really an iron target, perhaps because it is either too

small or too deep, it will not mute or modify the signal. In this case, the signal will remain good and the dubious target will be dug.

This insures that no good target will be misunderstood as iron and ignored. A few pieces of iron dug is a worthwhile trade-off. With

IRON I. D. a large amount of unwanted iron trash will be left behind and more valuable time spent on digging possible worthwhile

targets. Using IRON I. D. in extreme ground conditions may cause all targets to produce the chattering sound with some meter

movement toward IRON, in these areas the use of IRON I.D. is not recommended.

To function properly, IRON I. D. requires movement of the loop. Thus, it is ideally suited for use in the S.A.T. Motion operating

mode.

Remember ... no system is perfect. There may be times when Iron l.D. is not practical, such as in extreme ground conditions. In these

cases, do as you would with any other unit - "dig everything". But when it is practical, use it and increase your Gold Nugget to DugSignal

ratio.

Note again, audio chatter, and meter movement on iron, only occurs when the IRON I. D. toggle is held in TEST or placed in the ON

position.

IRON l.D. Meter

VARIABLE - SAT

VARl·SAT

~ ct

OFF X-GND

SALT

The last position on the control panel is occupied by the IRON I.D. Meter. This meter actually operates

along with the audio signal activated by the IRON I.D. toggle. When the signal is determined to be Iron

by the Goldmaster V I SAT, the needle will move to the right. This movement of the needle will be

accompanied by the chatter or nulling of the audio signal. Like the audio identification, the meter can

become confused in extreme ground conditions. The meter as well as IRON I.D. audio should be relied

upon only when testing shows it to be working well in a particular area with test targets. In many areas,

between the audio and visual response of the Goldmaster V I SAT to a target signal with the Iron I.D.

activated, the user should be able to accurately determine whether to dig a possible target or not. The

meter also serves as a battery check. When the detector is turned on, the battery condition automatically

shows on the meter for a few seconds. The Goldmaster V I SAT is not operational until the

automatic battery check is completed, indicated by the meter needle returning to the far left.

The VARI - SAT control is located on the back of the control box (the side with the battery compartment

door and loop connection). The VARI - SAT control allows the user to increase the speed of SAT

(Self Adjusting Threshold) from the preset factory speed, faster, up to 50 times faster than the standard

MODE TOGGLE SAT setting.

As you recall, under the description of SAT, we learned that SAT (Self Adjusting Threshold) re-adjusts

the threshold as the loop passes over quickly changing ground mineralization. The normal SAT speed

will be adequate for most ground conditions. This is the speed activated when the MODE TOGGLE is

in the SAT position and the VARI - SAT is in the "OFF" position (fully counterclockwise).

However, if the ground mineralization is changing from place to place very fast, or the ground contains

extreme amounts of imn mineralization or dissolved salt, the detector will become erratic in its behavior,

giving false signals or chattering. This interruption in the smoothness of the threshold can obscure

the sound of small or deep nuggets. In such conditions it is desirable to activate the VARI - SAT

control. With the MODE TOGGLE set to SAT, tum the VARI - SAT control slowly clockwise until it clicks indicating "ON". Turning

the VARI - SAT control clockwise increases the SAT speed. Advance the VARI - SAT control slowly, stopping often to sweep the

loop over the ground listening for smoothness of operation. Continue turning clockwise and sweeping the loop over the ground till the

threshold smooths out and the GOLDMASTER V I SAT operates stably. Then resume searching.

Earlier GOLDMASTER models had a MODE TOGGLE position labeled XGnd I Salt (extreme ground I salt). If the ground was

extreme the only option was to select this XGnd/Salt position which activated the fastest SAT speed. In this way erratic behavior was

eliminated. However, it may not have been necessary to advance all the way to the fastest SAT speed to achieve the best performance.

Some point between the standard SAT position and the fastest may have been more desirable. This position can now be achieved by

utilizing the VARI - SAT control. The reason for using only the amount of SAT speed necessary to smooth operation is that slower

speeds tend to detect smaller or deeper nuggets better than quick speeds. By the same token, if SAT is not fast enough to smooth the

threshold, ground minerals will obscure the sounds of small and or deep nuggets.

The bottom line is that you can operate the GOLDMASTER VI SAT in areas of extreme ground conditions (alkali salt flats found in

the desert areas and black sand or red dirt areas of high iron mineralization) more efficiently by being able to accurately adjust SAT

speed. Over 95% of the ground conditions will be adequately served by operating in the standard MODE TOGGLE SAT position

(VARI - SAT OFF). As you become more familiar with your GOLDMASTER VI SAT, and learn to recognize when the ground

mineralization is becoming a problem, you can experiment with increasing the speed of SAT to overcome ground interference.


Date: 2015-12-24; view: 755


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