TARGET DISPLAY and AUDIOSIGNAL IndicatorThe lower-left bargraph designatesSIGNAL strength only when operating inDiscrimination mode.The signal strength indicator at the bottomleftof the screen indicates how large orclose the buried metal target is.If all bars are illuminated, the target islarge or close to the searchcoil.If one or two bars are illuminated, thetarget is far away or small, or both.DEPTH IndicatorWhen operating in Discrimination mode, atarget’s location and size can be verifiedusing the PINPOINT control.Press PinPoint to temporarily detect metalwithout searchcoil motion, and amonotone hum.While holding the PinPoint button, theDEPTH indicator will appear. Thenumber beneath DEPTH represents thedistance of the object, in inches, from thesearchcoil. The Depth scale is calibratedto coin-sized objects. For objects otherthan a coin, the numeric value is a relativemeasure of the target’s depth.AUDIO FEEDBACKWhen a target is detected, the <strong>Gold</strong> <strong>Bug</strong> <strong>Pro</strong>will respond with two types of sound:1. VCO, or Voltage ControlledOscillator, is an audio responsewith variable pitch and volume.2. A LOW tone beep.In Discrimination mode, targets which fallinto the zone along the arc whosesegments are shaded will be identifiedwith a LOW tone beep and solid segmentswith a VCO.As the user sets the discrimination levelwith the + and - buttons, he is determiningwhich targets will induce the low tone, andwhich will be eliminated.All targets’ audio responses in All-Metalmode will be VCO.VCO, or Voltage Controlled Oscillator, isan audio response which provides a goodfeel for the target.26The stronger the target signal, the higherthe volume and the higher the audio pitch.Very weak signals will have the faintestvolume and lowest pitch.For this reason, the use of headphonesis always recommended for detecting thesmaller and deeper targets.2-DIGIT TARGET INDICATORIn Discrimination mode the 2-digit targetindicator, in the middle of the screen,provides a specific target value to helpidentify buried targets more accurately.With practice in the field, you will learn toassociate target values with the probableidentification of buried objects. The targetvalue can vary each time the searchcoilpasses over the target, depending uponthe orientation of the object and itsdistance from the searchcoil.As a starting point, refer to the table below.TARGET ReadoutThe table below lists some commonapproximate target values. Withexperience in the field, you willrecognize many types of metalobjects by their numeric value.OBJECTTARGET I.D.foil from gum wrapper 47 - 48U.S. nickel (5¢ coin) typically 58aluminum pull-tab 60 - 75aluminum screwcap 70 - 80zinc penny (dated after 1982) typically 78aluminum soda pop can 75 - 85copper penny, clad dime typically 83U.S. quarter (25¢ coin), clad typically 8550¢ coin, modern clad typically 87old silver dollar coin typically 89US silver Eagle $1 coin typically 91Caution: The target indications arevisual references. Many other types ofmetal can also be represented by a giventarget I.D.
GOLD PROSPECTINGIn the United States, gold is found in many places in thewestern states, Alaska, and in a few localities in theAppalachians. The old saying "<strong>Gold</strong> is whereyou find it," means that to find gold, youshould look in areas where the yellowmetal is known to be present.Hillsides are the best areas forgold prospecting using ametal detector, becausehillsides cannot becleaned out by panningand dredging the waystreams can. Also,gold on hillsides, not farfrom its source vein,tends to be larger, and hence morereadily detected, than alluvial (placer)gold which tends to get pounded topieces and worn away as it rolls alongthe streambed with gravel during floods.<strong>Gold</strong> is valuable because it is a scarcecommodity. Even in a good gold producingarea, you will often spend an entire daywithout finding any gold. Meanwhile youwill dig bits and pieces of other metal--birdshot, shells and bullets from hunting and targetpractice, bits of rusted barbed wire, chips off shovels and other mining tools,rusted tin cans, etc. Hot rocks -- rocks containing concentrations of ironoxides that sound like metal when you pass over them -- are also a nuisancein many gold areas. Discrimination is usually ineffective because the loss ofsensitivity resulting from discrimination is enough to cause those little nuggetsto vanish. If you have gone many hours without finding gold and arewondering if there is something wrong with your metal detector or how you areusing it, the most important clue is this: if you are digging tiny pieces of trashmetal, then if gold were present you would have found small gold pieces too!<strong>Gold</strong> <strong>Pro</strong>specting continued on next page27