White’s Electronics GOLDMASTER 24k Guida all'installazione

GOLDMASTER

24k

ADVANCED GUIDE

White’s Electronics, Inc.

1011 Pleasant Valley Road

Sweet Home, OR 97386 USA

whiteselectronics.com

©White’s Electronics, Inc.

Introduction

White’s Electronics, Inc.’s Goldmaster® platform has served electronic prospectors well over the

last 20 plus years, resulting in income for professional miners and diversion for hobbyists. With

modern advances in DSP, improved ergonomics, and performance increases, the Goldmaster® 24k

represents the next generation of high-frequency induction-balance gold nugget detectors.

When our engineers set out to build the GM24k, the goal was simple: improve the user’s chance to

nd gold without hurting their wallets.

The obvious way to achieve this goal is increased sensitivity. The GM24k features a 54% increase in

coil voltage over the GMT. You will see this in increased sensitivity to small nuggets. While testing

this machine in Brazil, this was shown in a tiny, 0.4 grain crystalline nugget we found encased in

quartz. In some cases this much power can be counter-productive if the ground is very challenging,

so use it with caution! Even at lower gain settings the GM24k is an extremely “hot” machine on

small gold and specimen nuggets.

Experienced electronic prospectors know that more sensitivity is not the only answer to increas-

ing the odds of success in prospecting. A machine’s ability to track and cancel the ground is often

the biggest challenge we face in our search for gold. That’s why the Goldmaster® 24k features an

all-new ground tracking system we call “XGB” (Xtreme Ground Balance). This system works with

multiple ground points to ensure stable operation. The GM24k also features Iron/Hot-Rock cancel-

lation in both audio modes, expanding the ground range even more for quiet operation in the most

challenging ground.

When the nuggets are few and far between, prospectors often have more success at sluicing, pan-

ning, or dry washing. You will nd an all-new mode in the GM24k, called “Ground Scan” that can

help you successfully track and mark black sand or other mineral deposits in stream beds, washes,

or even under ground (where the backlight comes in handy).

In addition to these new features, old standbys like Variable Self-Adjusting Threshold (vSAT),

Ground Grab, TracLock, and adjustable audio options help users to setup the machine as they see

t based on ground conditions and personal preference. Where other companies rely on completely

automatic operation for limited uses, White’s Electronics, Inc. believes in giving you the ability to

adjust a machine for a wider variety of conditions, hopefully resulting in more gold in your pouch.

With a combination of patience, research, and a little luck, you’ll get your GM24k’s coil over gold.

But be warned, if you don’t have gold fever yet you will after your rst nugget!

Good luck and happy hunting,

White’s Electronics

GMT Table of Contents

Chapter 1 Assembly............................................................................2

Assembly Instructions ....................................................................................................................3

Chapter 2 Batteries..............................................................................4

Standard Battery Holder ................................................................................................................4

Using the Standard Battery Holder ...............................................................................................4

Rechargeable Battery.........................................................................................................................5

Battery Meter ...................................................................................................................................5

Chapter 3 GMT Quick Start ...............................................................6

Quick Start Instructions....................................................................................................................7

Chapter 4 Controls..............................................................................8

Sensitivity Control.............................................................................................................................8

Sensitivity Adjustment......................................................................................................................8

Sensitivity Adjustment(cont’d).........................................................................................................9

Volume/Threshold Adjustment ..................................................................................................... 10

Hot Rocks ...................................................................................................................................... 11

Variable SAT Speed Control........................................................................................................ 11

VSAT Adjustment......................................................................................................................... 11

Target ID.........................................................................................................................................12

Iron Cancel......................................................................................................................................13

Iron Cancel Adjustment ................................................................................................................13

Ground Balance XGB .................................................................................................................14

TracLock/Ground Grab...................................................................................................................15

Ground Scan ..................................................................................................................................15

Chapter 5 Searching..........................................................................16

Pinpoint Technique ...................................................................................................................... 16

Headphones .................................................................................................................................17

Field Use & Tuning Tips .............................................................................................................. 18

Field Use & Tuning Tips (cont’d) ................................................................................................. 20

Field Use & Tuning Tips (cont’d) ................................................................................................. 22

Chapter 6 Information........................................................................24

Proper Care.....................................................................................................................................24

Service ............................................................................................................................................25

Warranty ......................................................................................................................................... 26

Warranty Transfer ........................................................................................................................... 27

Videos and Owner Information...................................................................................................... 28

Chapter 1 GM24k Assembly

Assembly

Detail on Step 3

Included with your GM24k:

1. Detector s-rod body

2. Middle rod

3. Lower ber rod

4. Coil hardware (washers, nut, bolt)

5. 6x10” DD Coil

6. 6” Concentric Coil

7. 8x AA holder (batteries included)

8. Rechargeable battery with charger

9. Cable straps or clips

10.Arm cup strap

11.Arm cup foam

12.GM24k Quick Start Manual

Chapter 1 GM24k Assembly

Assembly Instructions

1. Remove all parts from shipping carton and

check the assembly page to make sure all parts

are present.

2. Unlock “S” rod cam lock and insert the re-

duced end of the center rod into curved “S” rod

so that stainless steel spring clip buttons line up

and lock into the holes in the curved “S” rod.

Turn cam lock to secure.

3. Fit the rubber washers between clevis/lower

rod and search coil ears. Use only non-metal-

lic washers, ber bolt, and thumb nut, to secure

loop to clevis/lower rod. Then insert into center

rod so that stainless steel spring buttons line up

and lock into one of the adjustment holes in the

center rod. Turn cam lock to secure.

4. Unravel cable and wind the cable around the

clevis and rod assembly, rst revolution should

be OVER the top of the rod with some slack

before applying the cable retainer. This is done

so that the search coil can be paddled backwards

toward the rod without putting a strain on the

cable. Wind cable rmly all the way to the

handle toggle switch.Then plug connector into

control box turn lock ring to secure. To secure

cable, wrap velcro cable retainers around rod

and cable, one near the search coil and one near

the handle.

5. Grip the instrument by the handle, with your

arm in the elbow cup with strap secure, and

sweep the coil over the oor. If the instrument

t feels uncomfortable, adjust the elbow cup by

removing and repositioning the bolt and install-

ing in one of the optional positions. If neces-

sary, readjust clevis/lower rod length with the

spring clip buttons so that the search coil can be

held near the oor without requiring stooping

over.

6. Adjust the elbow cup strap so that it is loose

enough for you to slide your arm in and out

with-out loosening each time you want to set the

detector down. Peel and stick elbow cup foam

pads on the inside of the elbow cup, one on each

side.

7. Install battery with plastic tab and steel

contacts facing toward inside of battery com-

partment. The rechargeable battery may require

charging to ensure full capacity before using.

8 It should be noted at this point that the de-

tector may not work as expected indoors due

to the high degree of metals ( nails, pipes, etc.)

used in modern construction and the presence

of electrical interference. It is best to tune and

practice out-of-doors to ensure stable, predicta-

ble results.

Chapter 2 GM24k Batteries

Batteries

Standard Battery Holder

1. The standard battery holder holds eight “AA”

cell batteries. Alkalines are recommended for

use with this model. During normal searching

conditions you can expect about 40 or more

hours of hunting time from one set of eight

alkaline batteries.

2. Non-alkaline batteries can be used in this

holder. When non-alkalines or rechargeable

“AA” cells are used, detecting time (before

replacement/ recharge) may be reduced to about

30-35 hours.

3. Once the batteries get to 8 volts, the machine

will turn itself off to keep from over-discharg-

ing the cells. Battery level is noted on meter.

4. The battery compartment opens by pressing

on the two buttons on the side of the battery

box, releasing the catch and hinging open the

door.

5. Battery insertion requires a similar amount of

force to loading a magazine into a pistol for full

engagement.

Using the

Standard Battery Holder

1. Slide open the battery holder lid (decal side

of battery holder) by applying gentle upward

pressure on the tab of the door so that it un-

locks. Slide the door away from the battery box

exposing the cell positions.

2. Remove any old cells from the holder. Note

the (+) and (-) positions of each cell and the (+)

and (-) for each position marked inside the cell

tray. Install new “AA” cells noting carefully

the correct (+) and (-) positions.

If the cells are installed incorrectly, the de-

tector may require service by an Authorized

Service Center.

3. Slide the door closed so that it snaps secure-

ly.

4. Insert the battery holder into the detector

with enough force to hear the double “click”

from the battery retention clips inside.

Chapter 2 GM24k Batteries

4.5

3.5

2.5

1.5

0.5

Any voltage reading

less than 8 volts-charge

for 5 hours maximum

on Quick Charge

setting. Further charg-

ing can

damage the

system.

13 12 11.5 11 10.5 10 9.5 9 8.5 8 7.5 7 6.5 6

Rechargeable Battery

A rechargeable battery can give you the most

exibility possible when heading out to look

for gold.

Rechargeable batteries deliver fairly constant

voltage until they’re nearly dead. If you use

them until they are dead, they will deteriorate

more quickly than if you only use them till

their voltage starts to drop signicantly. There-

fore, rechargeables should be taken out of

service and recharged as soon as you notice the

battery life starting to fall substantially below

the bar graph position that corresponds to fully

charged batteries.

The White’s Rechargeable Ni-cad battery will

not provide the same amount of continuous use

as a full set of Alkaline batteries. Plan on about

12-20 hours of operation depending on back-

light usage, headphones, and sensitivity level.

Please note that due to their lower voltages, it

is common for fully-charged Ni-cad or other

batteries to initially read as less than 12 volts

(just under full bars on your display). This is a

result of the chemistry of the cells and will not

impact performance.

Using the Battery Charger on Quick Charge Setting

Charging

Hours

Battery Voltage Reading

Battery Meter

The battery icon displays the following voltag-

es:

4 bars = 11.5 volts or higher 3 bars =

11 volts or higher 2 bars = 10 volts or

higher 1 bar = 9 volts or higher Flashing

outline = less than 9 volts

Typical battery life will be in the neighborhood

of 40 hours or more with alkaline, and 12-20

with the Ni-cad pack.

Non-rechargeable batteries will start to drop in

voltage as soon as they are put into use and then

slowly diminish in voltage till they die. The Ni-

cad rechargeable battery pack, however, will

diminish voltage very slowly, in somewhat of a

at line and then when they begin to lose their

charge, the voltage will drop like a rock. Head-

phone use pro-longs all battery life. Battery life

will vary a great deal with temperature, number

of target signals, battery type, brand, and shelf

life. When traveling far from home it is always

a good idea to carry 8 extra AA alkaline batter-

ies with you as well as an extra empty battery

holder.

Chapter 3 GM24k Quick Start

Target ID #

Higher number,

Better chance of gold

Beep Mode On

Iron Cancel On

Volume Level

SAT/Threshold Level

Audio Mode

SAT +/-

Volume +/-

Threshold +/-

Iron Cancel

Disc LO/HI

Visual Target ID

Ground strength in

Ground Scan mode

Backlight On

TracLock On

Sensitivity

Power On/

Off

Backlight

TracLock

Ground Scan

Sensitivity

Adjust other settings

Ground Grab/Exit Setting Selection

Pinpoint (non-motion)

GM24k Interface

NOTE: Regular text = button TAP,

Italic text = button HOLD

Chapter 3 GM24k Quick Start

* SPECIAL NOTICE

If you attempt to demonstrate or test the

GM24k by waving targets in the air in

front of the search coil, it is ESSENTIAL

to have the GROUND BALANCE toggle

in the LOCKED setting.

This is necessary, for when the GM24k is

in the XGB setting, the search coil must

SEE ground while it is passing over the

target or it will think that the target IS

ground and will attempt to track it out.

This is the case whether you are demon-

strating with or without Iron Cancel.

You may, however, demonstrate the fast

ground balancing feature of XGB or

GRAB by waving or pumping a mineral-

ized rock in the air in front of the search

coil.

Thus, testing the GM24k with targets

while in XGB mode must be done in or on

the ground.

Quick Start

Instructions

With the GM24k properly assembled and the

batteries installed, follow the instructions below

to start nding those nuggets!

Turn the GM24k on by pressing the POWER

button.

Set the VOLUME to your preference (tap

Speaker icon, use Up and Down buttons).

Set the THRESHOLD to a faint hum (hold

Speaker icon, use Up and Down buttons). For

silent search, turn this all the way down

Set the SENSITIVITY to a level that ensures

smooth operation (Up and Down buttons).

Set the SAT to get a stable threshold (hold

Music button, use Up and Down buttons).

Select your preferred AUDIO mode (tap

Music button). With the Music icon dis-

played you are in Beep mode. With no icon,

you are in Zip mode.

Enable IRON CANCEL if you experience

difcult ground conditions, hot and cold

rocks, or iron trash (tap Nail button).

Lower the search coil to the ground, then

“pump” the coil up and down acouple of

times and XGB will automatically balance

or track out the ground mineralization. Or

you can Lock the tracking (Lock button) and

perform a ground grab (Bullseye button).

Start swinging the search coil in wide

sweeps that overlap each other.

If you experience false signals or constant

beeping or popping, turn the SENSITIVI-

TY down a bit, adjust the SAT up, or enable

IRON CANCEL.

Chapter 4 GM24k Controls

Current

Sensitivity

Level

Sensitivity

Increase

Sensitivity

Decrease

Controls

Sensitivity Control

With the SENSITIVITY control, you increase

the signal strength coming from the ground. You

might expect increased signal strength to always

nd more nuggets at greater depths. However, high

ground mineralization will “bounce” the signal

back and mask good targets. It is therefore nec-

essary to ADJUST the SENSITIVITY to give you

the maximum allowable SENSITIVITY without

masking targets or over-loading the circuit and at

the same time allowing you to operate the detector

with a constant threshold hum so that faint signals

can be detected.

This is where the GM24k can help you out. When

ground mineralization is too high for the current

SENSITIVITY control setting, the display shows

you a series of lines along with an audible “alert”.

Reduce the SENSITIVITY till the overload warn-

ing ceases. On occasion, while searching, you

might go over a very large or very shallow target.

This will result in the same type of behavior. Lift-

ing the coil higher may reveal some information

on the target. You still might want to dig it up!

Sensitivity Adjustment

1.The UP and DOWN buttons control the SENSITIVITY. Each press on the UP button increases from a

minimum level of “0” to a maximum level of “10”. Please note that levels 0-9 adjust the system gain, and

that setting 10 enables an Audio Boost for maximum sensitivity.

2.Average ground conditions will generally allow for settings of 5-7 on the SENSITIVITY setting. In

mild ground you may be able to run as high as 10, and in extreme ground you may need to lower the sen-

sitivity to under 5. If the GM24k overloads, your sensitivity is set too high!

3.One way to look at the SENSITIVITY control is like the accelerator in your car. Sometimes you have

to ease off for better control, and other times you can go “full throttle” for maximum performance.

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