Dive Teams Depend on Detection Devices JW Fishers Metal Detectors

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Dive Teams Depend

on Detection Devices

Clockwise from top left; Louisville Fire Dept dive team members with their Fisher side scan, Washtenaw County Sheriff’s diver with Pulse 8X, Rochester Police dive team member with their SCAN-650 sonar, Chief David Pease of REDS Team with Pulse 6X and recovered handgun.
     Public safety dive teams depend on sonars, ROVs, and underwater metal detectors to accomplish their underwater search operations safely and effectively. When a New York man accidentally fell from a concrete ledge into the Genesee River, the Rochester Police dive team was immediately dispatched. To save time, the incident commander made the decision to deploy a SCAN-650 scanning sonar recently acquired from JW Fishers Mfg. The sonar transmits a sound wave that sweeps a circle up to 200 feet in diameter. The wave bounces off any object on the bottom and the return signal is sent topside where it produces an image on a laptop computer showing the operator exactly what’s down there, regardless of water clarity. Officer Paul Romano reported, “We set up the SCAN-650 and found a target relatively quickly. A diver was splashed and confirmed it was the victim. The sonar was instrumental in helping make a fast recovery.”
Another sonar being used by many teams including the Alaska State Troopers, Louisville Fire Department in Kentucky, and Bingham County Search and Rescue in Idaho is side scan. Instead of deploying the device from a stationary position like the SCAN-650, the side scan sonar is towed behind the boat and scans hundreds of feet of ocean, lake or river bottom with each pass of the vessel allowing a large area to be searched in a very short time. Encompassed within Bingham County is 26 square miles of water including the Snake River and the American Falls Reservoir. This summer proved to be an especially treacherous one on Idaho’s waterways with 7 people drowning since Memorial Day. To assist in their recovery operations the county’s search and rescue group, in conjunction with the Bingham County Sheriff Department, recently acquired a JW Fishers SSS-600K side scan. This sonar will locate anything from a drowning victim to a sunken vessel. The image displayed on the topside computer looks as if the water has been removed and the operator is seeing everything on the bottom. In Alaska there are thousands of square miles of ocean surrounding the state, and many lakes and rivers scattered across its interior. Much of this water is frozen for a good part of the year. Alaska State Troopers must have the ability to respond to a variety of emergencies whether its a vehicle going off the road into water, or a ski mobile disappearing though the ice. The agency acquired both a SCAN-650 scanning sonar and the SSS-600K side scan for their varied call outs. The scanning sonar is easily deployed through a hole in the ice and scans a large diameter circle on the bottom, a task that would be dangerous and time consuming for divers. The towed side scan is employed when large areas of open water need to be searched. When a target appears on the computer screen, the operator simply clicks the mouse on the object and the GPS position is displayed, making it easy to relocate and recover the target.
In Missouri the Highway Patrol handles more water-related incidents than any other agency. Each year their dive team conducts an average of 55 underwater operations to recover the victims of drownings and boating accidents, or to retrieve evidence for criminal felony cases. Team members utilize underwater metal detectors, remote operated vehicles, sonars, and underwater video systems to help locate and photograph evidence. Included in their equipment locker is a JW Fishers SeaOtter-2 ROV, a TOV-1 towed video system and a Pulse 8X metal detector which is an essential tool for locating evidence disposed of in a waterway. Many criminals mistakenly believe if they dispose of gun or knife in a waterway, it will be lost forever. But police divers routinely prove them wrong by finding weapons, shell casings, stolen objects, and explosive devices with the Pulse 8X.
Two other groups that have discovered the effectiveness of underwater metal detectors are North Carolina’s REDS Team, a non profit group consisting of Rescue, Extrication, and Delivery Specialists, and the Washtenaw County Sheriff’s Office Dive Team. David Pease, chief of the REDS Team, said their JW Fishers Pulse 6X detector helped locate a gun for their local police department. Washtenaw dive team member Sgt. Paul Cook reports, “we have used the Pulse 8X with excellent success locating many items for evidence including spent cartridge casings, weapons, and property. It’s a valuable piece of our kit and we’d be lost without it.”
A few of the many other agencies using JW Fishers search equipment are South Carolina’s State Law Enforcement Division (SLED), Suffolk County Sheriffs Marine Unit in New York, Royal Canadian Mounted Police Underwater Recovery Team, Miramar Police Dept in Florida, Gallatin County Rescue in Montana, the US Air Force Rescue Squad, US Border Patrol, Los Angeles Port Police, Monmouth County Sheriffs Office in New Jersey, Wichita Falls Police Dept and Laredo Fire Dept in Texas, and Boston Police Special Operations Unit.

JW Fishers SeaOtter-2 ROV

  JW Fishers SeaOtter-2 and SeaLion-2 are state of the art ROV systems with sophisticated four motor propulsion, front and rear facing video cameras with both pan and tilt capability, front and rear lights, and a topside control console with flat screen display built into a rugged waterproof case. These ROVs are the ideal tool for pipeline inspections, river and ocean searches, dam inspections, oil and gas platform work, aquaculture observation, inspections in hazardous environments, use by law enforcement and public safety dive teams, and military ops. The more-powerful SeaLion-2 has a 1,000 foot depth rated housing and 15.4 inch flat screen  display.  The more economical SeaOtter-2 has a 500 foot depth rated housing and 10.4 inch display.
Options for these ROVs include scanning sonar, a metal detector, manipulator arm, longer umbilicals, two side cameras, text overlay, computer control, and built-in DVR digital video recorder.
To receive a detailed technical data sheet with all specifications go to www.jwfishers.com or send an email request to info@jwfishers.com.

JW Fishers Side Scan Sonars

   JW Fishers sonars offer a number of advantages over other low cost side scan systems. Some of these are; a larger towfish for greatly increased stability of the transducers, sophisticated software, the ability to have two sets of transducers in one towfish, and the capability to operate with cable lengths up to 1,000 feet. feet.
The quality of the images produced by any side scan system is directly related to the stability of the platform that moves the transducers through the water. Many low cost side scans have a small towfish. The drawback of a small fish is that it can easily be tossed about by underwater currents or affected by movement of the boat due to wave action which can be transmitted down the cable. This leads to poor quality images from the unstable movement of the fish. Fishers four foot long towfish provides an extremely stable platform for the transducers. The fish moves through the water like an arrow through air, which produces high resolution images.
The quality of the software, which is the “brains” of a sonar system, is another feature that differentiates Fishers side scan from other low cost systems. Fishers SONAR VIEW software has a vast array of features that gives the operator tremendous versatility in displaying and manipulating the sonar data coming up from the towfish. In addition, optional mapping software allows the operator to see the track of the boat as it travels over the search area and the size of the area being scanned, ensuring no part of the search area is missed. During playback the track can be overlaid onto a nautical chart showing the exact location of the search operation.
Many low cost side scan systems are available in only one frequency, or have different towfish for different frequencies. To change frequencies requires “reeling in” one towfish and then deploying another, an arduous and time consuming operation.
JW Fishers offers three frequencies; 100K, 600K, and 1200K. Side scans are available in either single or dual frequency, with the customer selecting which frequency or frequencies they require. In Fishers dual frequency side scan there are two sets of transducers in one towfish. This allows the operator to quickly and easily switch between frequencies at any time during operation. Lower frequencies have longer range, but lower resolution, Higher frequencies have a shorter range, but higher resolution. 
   The typical ratio of cable length to tow depth is 4 to 1. This means to tow the side scan fish at a depth of 100 feet requires 400 feet of cable. Some low cost systems have a limited length of cable they can operate with. Fishers sonars can work with cable lengths up to 1,000 feet. This means they can be towed at a depth of 250 feet. When coupled with the optional DDW-1 deep dive wing, Fishers side scans can be towed at depths up to 500 feet, which is beyond the depth capability of many of the small systems.
   To receive a detailed technical data sheet with all specifications go to www.jwfishers.com or send an email request to info@jwfishers.com.         

JW Fishers Pulse 8X metal detector

  The Pulse 8X comes with everything needed for land and underwater metal detecting. JW Fishers detectors are commercial-grade machines that work equally well on land and underwater. This detector will locate a variety of targets including jewelry, coins, shell casings, weapons, gold bars, anchors, ordnance, cannons, and pipelines. The Pulse 8X uses state-of-the-art Pulse Induction technology to detect all metals, ferrous and nonferrous, while ignoring mineral in the environment such as salt water, coral, black sand, and high-iron rocks. Fishers detecors are not affected the material betweeen the metal object and the search coil. The detection range remains the same whether detecting through air, water, silt, sand, mud, or rock.
The Pulse 8X has both visual and audio readouts. Audio is provided by an underwater earphone that tucks under the mask strap or into a diver’s hood. The visual output is displayed on a large, easy to read meter. The 8X comes with a complete accessory package that has everything needed to use it on land, in the surf, or diving to depths of 200 feet. Included in the kit.  Included in the kit are land and underwater earphones, a high-impact PVC handle for underwater use, an anodized aluminum handle for land use, AC battery charger, DC battery charger, hip-mount kit, and a heavy duty cordura nylon carry bag. Rechargeable batteries power the detector for 12 full hours. Batteries can be easily field replaced to provide around the clock operation.
One of the most unique features of Fishers detectors is the complete line of interchangeable coils available. The range includes a probe coil, 5 inch coil, 10 inch coil, 16 inch coil, 18 inch coil with 100 foot cable for boat deployment, and an 8 x 48 coil coil that is mounted on 4 small skis for dragging on the beach or in shallow water.
For more information on the Pulse 8X go to www.jwfishers.com and click on the Products tab at the top of the page, then click on hand-held metal detectors and Pulse 8X.

To request a catalog on JW Fishers complete line of underwater search equipment go to www.jwfishers.com or send email to info@jwfishers.com.
JW Fishers Mfg. Inc.
1953 County Street
East Taunton, MA 02718 USA
PH: (800) 822-4744, (508) 822-7330
FAX: (508) 880-8949
EMAIL: info@jwfishers.com
WEB: www.jwfishers.com
You are receiving our emails because you opted in at our website, are a current customer, or have expressed an interest in receiving our occasional communications.  You can opt out at any time by clicking  “unsubscribe”  at the bottom of this email.
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Tesoro SAND SHARK Metal Detector OPERATOR INSTRUCTION MANUAL Salt water diving

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Tesoro SAND SHARK Metal Detector OPERATOR INSTRUCTION MANUAL
 


 

CONGRATULATIONS!

Your new TESORO metal detector was designed to provide you with many happy hours of enjoyment in the most rewarding hobby I can think of—treasure hunting. Ahead of you lie fascinating and exciting experiences as you step into the past, uncovering artifacts lost by past generations. I wish we could share these experiences with you, and we wish you the best of success.

Your Tesoro metal detector is capable of meeting your needs in a wide range of treasure hunting situations. As with any detector, operator skill and familiarity is probably the limiting factor in determining how successful you will be. We recommend that you read and understand this manual fully before attempting to use the instrument in the field. Then, as you practice and become familiar with your detector, your rate of success will increase dramatically.

Your TESORO metal detector is a precision electronic instrument, which will last for years if properly cared for. Treat it right and it won’t let you down.

 

 

 


GENERAL DESCRIPTION

The Sand Shark is the first Pulse Induction metal detector that is controlled by microprocessor technology. It combines new technology with Tesoro’s time-proven PI circuits and interchangeable Spiral Printed coils. While simple to operate, the Sand Shark offers a wide variety of user definable controls that allow for precise fine-tuning of the detector. Don’t be fooled by its simplicity, the Sand Shark is capable of delivering peak performance by eliminating troublesome adjustments and complicated features creating an extremely simple to operate lightweight detector. The Sand Shark is packaged in a waterproof housing making it ideal for wet weather use, beach hunting, or diving in fresh or salt water. It is convertible to body/belt mount and requires no special tools.

As a Pulse Induction instrument the Sand Shark will provide mineral free operation in virtually all ground mineral or salt water environments. Equipped with auto tuning the Sand Shark is a motion- based “all metal” detector. Though the searchcoil must be moving when pinpointing, due to the auto tuning, the amount of motion is so slight that pinpointing is easily accomplished.

Designed as an all-purpose detector, the Sand Shark requires no special ground adjustments or complicated set-up. A variety of optional searchcoils provide the operator greater versatility and a wider range of site selection. A guide to selecting the proper optional coil is included in the section for “Selecting the Right Searchcoil.”

Be sure to complete and mail the warranty registration card in order to validate your warranty.

 


UNPACKING THE BOX

Your Sand Shark was shipped with these parts:

1 Upper Pole Assembly

Fully assembled, including upper pole stem with handle grip, padded arm bracket, pole lock and control housing.

1 Middle Pole Assembly With Pole Lock

1 Lower Pole Assembly

Fully assembled with 2 washers and nylon nut and bolt.

1 8” round printed spiral searchcoil with 8′ cable

1 8-cell battery pack with 8 AA batteries installed

1 Tube of Dow Corning #4 silicone

2 Velcro cable straps

1 Operator Instruction Manual

1 Tesoro Warranty Card

If any of these items are missing, contact the Tesoro Authorized Dealer where you purchased your detector immediately.


ASSEMBLING YOUR DETECTOR

    1. On the lower pole assembly, remove the mounting screw and thumb nut from the pole tip.
    2. Insert the pole tip between the mounting ears of the searchcoil and align the holes of the pole tip and washers with those of the mounting ears.
      Note: The pole tip should fit very snugly into the mounting ears.
    3. Insert the mounting screw through the holes in the mounting ears and pole tip—entering from the side opposite the cable connection.
    4. Install the thumb nut on the mounting screw and tighten by hand.
      Note: Do not overtighten the thumb nut. It should be snug but not too difficult to loosen up.
    5. On the middle pole assembly, depress the two spring buttons and slide the middle pole assembly into the upper pole assembly until the spring buttons click into the holes—locking the two assemblies into place. Tighten the pole lock to secure the two assemblies together.

 

 

  1. Slide lower pole into middle pole until spring buttons click into the first set of adjustment holes. Turn pole lock to tighten—locking the assembly into place.
  2. The Sand Shark can be assembled in several different configurations. Take a look at the pictures below to find out the best configuration for you:Control housing mounted under arm
    Control housing mounted under pole
    Divers setup (lower pole set directly into upper pole)
    Body Mount

    Converting the Sand Shark from pole mount to body/belt mount is simply a matter of removing the control box from the upper pole and unwinding the cable. To remove the control box from the pole, depress the four spring buttons that hold the mounting bracket and control box to the pole, and lift. It is easiest to release one set of spring buttons at a time.

  3. Once you have decided on a pole mount configuration, wrap the cable around the pole leaving enough slack near the searchcoil to permit searchcoil adjustment.
    Install the coil connector into its receptacle on the back of the control housing and tighten it fingertight.

Note: Do not use pliers to tighten the coil connector. Do not allow the cable to flop loosely over the searchcoil. Since the detector is sensitive enough to “see” the tiny wires in the cable, a floppy cable can cause false signals as the searchcoil senses the moving wires.

 


BATTERY INSTALLATION / REPLACEMENT

The Sand Shark has been equipped with a drop-in battery pack. To install or replace the batteries, make sure the detector housing is dry, then release the two draw bolts securing the faceplate to the housing. Gently pull the control panel free being careful not to twist or strain the ribbon cable connecting the faceplate panel to the printed circuit board. The Sand Shark takes 8 AA size alkaline batteries. Also, make certain that you follow the polarity indicators on both the battery holder as well as the batteries themselves. Then check the polarity of the pack as it goes into the housing. Look inside the housing for the two spring clips and slide the pack so that the battery terminals meet the spring clips. There is only one correct way to put the battery pack in. If the batteries are put in wrong, the detector will not work. Replace the faceplate and use the drawbolts to clamp the faceplate back onto the housing.

Do not rest the unit on the coil connector while clamping the faceplate. This can cause excess wear and damage to the connector.

IMPORTANT NOTE: Always make sure the instrument is dry before opening. Water, if allowed to make contact with the circuit board, may damage it. Always make sure the O-ring is clean and free of dirt or sand. It is recommended that you wipe the O-ring with a dry cloth and look for damage and apply a new coat of diver’s silicone grease before replacing it. Failure to maintain the O-ring will result in extensive damage and will not be covered under warranty.


ADJUSTMENT

The searchcoil angle and stem length should be adjusted so that the unit does not become uncomfortable or tiring to hold after long periods of use. The detector should rest in your hand with arm relaxed allowing it to swing back and forth without having to lift with the elbow or shoulder while keeping the searchcoil as close as possible to the ground without touching. The pole length is adjusted by depressing the spring buttons and extending or shortening the lower stem until they click into the set of holes that give you the most comfortable setting. The searchcoil should rest about one inch above the ground while standing erect. Adjust the angle of the searchcoil so that it is parallel to the ground. Tighten the searchcoil thumbnut by hand so that the searchcoil will maintain this setting.


QUICKSTART TEST AND TUNING PROCEDURES

The Quickstart is designed to teach you how to use your new Sand Shark. It provides a quick and easy means of learning all of the functions of your detector and the concepts behind the functions.

You will need the following items:

  1. Your fully assembled Sand Shark metal detector.
  2. Several targets for air test.
  3. A nonmetal table or counter surface.

Here’s what you will do:

  1. Set the THRESHOLD and VOLUME.
  2. Perform an Audio Battery Test.
  3. Perform an Air Test in the VCO Mode.
  4. Set the Audio Frequency for the NORMAL Mode.
  5. Perform an Air Test in the NORMAL Mode.
  6. Set the Pulse Width.
Prepare for the Quickstart

Place your assembled Sand Shark on the nonmetal surface as shown in the photo. Make sure there are no metal objects near the coil and remove any jewelry from your hands and wrists.

Start with the controls like this:

  1. PULSE WIDTH in center position.
  2. VOLUME & THRESHOLD in the 1 o’clock position.
  3. Mode Switch in OFF position.
Set the Threshold and Volume

The Mode Switch controls all of the tuning functions on your Sand Shark. As we go through the other tuning steps, we will be resetting the Mode switch to the other functions.

We will start by turning the Mode Switch from off to VCO. At this time you will hear a humming tone in the headphones. This sound is the threshold. Its purpose is to give you a reference point to judge targets by. Some targets may be small enough or deep enough that they will not be able to generate an audio tone by themselves. By monitoring a threshold, you already have a signal so changes in that signal are easier to hear. However if the threshold is set too loud, the small changes will not be noticed. Therefore, a low steady threshold setting is ideal. You can change the threshold with the Threshold adjust knob. Try turning it up and down to find the best possible setting for the machine.

Once the threshold has been set, you should adjust the volume control to a comfortable level. Please remember that the sound level will be affected by your surroundings. What may be just right in one location may be too high or low in another. The volume can be changed with the VOLUME adjust knob. Take a moment and find the level that is best for you now.

Perform an Audio Battery Test

With the threshold and volume set, we will now check the batteries. Turn the THRESHOLD adjust knob all the way counterclockwise until you feel a click. You should hear a number of beeps. If the batteries are fully charged, you will hear 6 or 7 beeps. As the batteries drain, you will hear fewer and fewer beeps. When you hear no beeps or only one, it will be time to replace your batteries. Please remember that you will have to reset your threshold when you are done with the battery test. Try your battery test and reset your threshold before moving to the next step.

Perform an Air Test in the VCO mode

You are now ready to perform an air test in the VCO Mode. VCO stands for Voltage Controlled Oscillator. The VCO mode has a very distinct sound that makes it very easy to work with. As a target gets close to the coil, the rise in signal voltage causes the oscillator to change frequency and amplitude causing the audio part of the signal to become higher in pitch and louder in volume. These changes will leave no doubt in your mind that you are close to a target. Try waving your targets in front of the coil. Start from a distance of 10 to 12 inches away from the coil and work your way towards the coil. Now try starting from 6 inches to the left or right side of the coil and working your way to the center of the coil. Notice how the audio signal changes. Your strongest signal will always be closest to the center of the coil, but additional information can also be learned by the signal strength. A deep or small target will give a smaller change in the threshold than a larger or shallower target will give. Take some time to try a number of different targets at different depths to find out how your detector sounds.

Set the Audio Frequency for the Normal Mode

In the NORMAL tuning mode you will be able to preset the frequency of the audio tone that you will hear in the headphones. The adjustment is made by going into the “F” SET Mode on the Mode switch. Notice that the “F” SET is highlighted in this mode and that “F” ADJUST written in the same highlighting is found beneath the THRESHOLD adjust knob. When the mode switch is in “F” SET, the THRESHOLD adjust knob now sets the audio tone. Try turning the “F” ADJUST knob up and down to find the audio frequency that you like best. While you are in the “F” SET mode, your Sand Shark will not respond to targets. When you are ready, turn the Mode switch to NORMAL. Please remember that once the frequency is set, you must reset your threshold to a low steady hum.

Perform an Air Test in the Normal Mode

You are now operating in the NORMAL Mode. In this mode only, one frequency at a time will be heard and the volume of the audio signal will determine signal strength. Try waving your targets in front of the coil. Start from a distance of 10 to 12 inches away from the coil and work your way towards the coil. Now try starting from 6 inches to the left or right side of the coil and working your way to the center of the coil. Notice the difference from what you heard in the air test in the VCO Mode. Your strongest signal is still closest to the center of the coil, but there was no change in audio frequency. Take some time to try a number of different targets at different depths to find out how your detector sounds.

Set the Pulse Width

The PULSE WIDTH setting controls the amount of signal that the Sand Shark will transmit into the ground. A pulse induction detector works by transmitting a signal and then reading the residual eddy currents that are left on metal items. All of this takes place at approximately 600 pulses per second. Increasing the pulse width allows the detector to transmit longer and create more eddy currents on a metal target. These extra currents are more easily picked up during the receive phase and will therefore increase depth and sensitivity. However, more transmitted signal means more power used in the transmit phase, limiting the battery life. We have marked the best balance of battery life and depth and sensitivity on the faceplate at the mid-position on the PULSE WIDTH adjust knob. You will be able to increase or decease the PULSE WIDTH by turning the Pulse width adjust knob. Start with the detector in the factory recommended position and wave a few targets in front of the coil. Try turning the knob and see what effects it has on depth and sensitivity.

 


CONGRATULATIONS

You have completed the Sand Shark Quickstart Test and Tuning Procedures and in the process have learned quite a lot about your new Sand Shark. But experience is the best teacher. I would recommend that you get out and practice with your detector as much as possible. For your convenience, you may want to create a test garden in your lawn or work a local park. Any time spent using your detector will give you valuable experience.

 


SELECTING THE RIGHT SEARCHCOIL

Selecting the right searchcoil for the type of detecting you’re doing will add greatly to your success. The Sand Shark comes with a standard 8 inch Printed Spiral coil, which is a new and revolutionary design developed by Tesoro specifically for the Sand Shark. This is an excellent overall coil since most people who operate PI instruments are usually searching large sandy beach areas where targets are easy to dig and there is usually not an over abundance of trash. This coil will detect very tiny targets for its size and provides excellent target separation while giving more ground coverage. However, it is not always the right coil for the job. Therefore, Tesoro has made it possible to interchange coils and has developed a variety of its unique Printed Spiral searchcoil in a selection of sizes.

In addition to the standard 8 inch open center searchcoil, three optional coil sizes are available for the Sand Shark. The 10 1/2 inch open center coil is designed for areas where digging is easier and where junk targets may not be too numerous. The 7 inch coil will be particularly useful when searching for smaller targets, such as gold nuggets. The 10 inch elliptical allows a widescan sweep pattern while keeping a good sensitivity to small targets.

 


PINPOINTING

Move the searchcoil slowly across the target from side to side and then from front to back at 90 degree angles. Raise the coil slightly, slow the sweep speed, and shorten the sweep to narrow the detection area enough to make it easy to tell where the coil center is at the instant of sound as you crisscross the target.

 


DETECTOR PROTECTION CHECKLIST

Congratulations, you have just purchased a new metal detector, and we wish to thank you for choosing Tesoro.

So many people are disappointed when their new “state-of-the-art” detector becomes less and less exciting to use and doesn’t seem to go as deep anymore. There is something that you can do to keep your new detector working as good as when it was new.

The most important thing is simply to remember that your detector is an electronic instrument and to treat it as such. You wouldn’t expect your TV set to operate properly if you stored it in the trunk of your car, would you?

We have generated the following list to help you take care of your detector and to help ensure that you do not void its warranty. If you will follow its guidelines, you will find your detector will not let you down.

  1. Operate your detector exactly as recommended in this Operator Instruction Manual.
  2. Do not attempt to modify or repair the detector’s electronics.
  3. Cable is hard-wired into searchcoil. Do not attempt removal of the spring retainer on the searchcoil housing.
  4. Use only high quality carbon-zinc, alkaline, or nicad batteries. Remove batteries during long term storage. Never substitute batteries of other voltages. Brands should not be mixed. Do not attempt to modify the power supply system.
  5. Never spray lubricants such as WD-40 or any types of cleaners, sealants or other chemical preparation on or into the detector.
  6. Avoid banging the searchcoil against rocks or foundation walls.
  7. Always protect the searchcoil with a properly designed scuff cover.
  8. Remove and clean out scuff covers periodically to avoid buildup of mineralized or metallic particles.
  9. After use, clean the detector with a soft cloth to remove any dust, moisture, or other contaminants.
  10. Do not transport or store your detector in the trunk of your car.
  11. Keep cables properly wound to stem and protected. Floppy or pinched cables may short causing erratic noises or unnecessary replacement of searchcoils.
  12. Protect the detector from dust, moisture, and extreme temperatures during storage. Avoid storing it in places such as attics, basements or garages. When shipping the detector, use the original factory carton or a similar heavy-duty container. A one inch minimum clearance of padding around the detector must be provided when shipping.
  13. Treat your detector as you would any sensitive electronic instrument. Although ruggedly constructed and designed to withstand the demands of normal treasure hunting applications, it is not intended to be improperly operated or abused.

 


SPECIFICATIONS
Operating Frequency 600 pps
Searchcoil Type Printed Spiral
Searchcoil Size 8 inch Diameter
Audio Frequency Approx. 220-450 Hz
Audio Output Stereo Piezo Headphones
Weight (may vary slightly) Less than 4½ lbs.
Battery Requirement (8) AA DC (alkaline)
Battery Life (typical) 10 to 20 hours
Optimum Temperature Range 30° to 100° F
Optimum Humidity 0 to 75% R.H.
Operating Modes VCO Motion All Metal
Adjustable Audio Frequency All Metal
Maximum Depth Rating 200 ft.

 

WARRANTY SERVICE

Your Tesoro metal detector is covered by a Limited Lifetime Warranty, the terms of which are listed below. If your metal detector should require service, you may return it to the Tesoro factory at the address below.

LIMITED LIFETIME WARRANTY

This warranty gives you specific legal rights, and you may have other rights which vary from state to state.

This instrument is warranted to be free of defects in material and workmanship as long as it is owned by the original consumer purchaser. This warranty is not transferable and is valid only if the warranty registration card has been completed and mailed within 10 days of purchase.

TESORO will, at its option, repair or replace any instrument covered by this warranty, without charge, except for transportation charges, at its factory in Prescott, Arizona.

This warranty excludes batteries, damage caused by leaky batteries, cable breakage due to flexing on body mount units, and wear of the searchcoil housing. Also excluded are instruments which have been abused, altered, or repaired by an unauthorized party.

Under the copyright laws this documentation may not be copied, photocopied, reproduced, translated or reduced to any electronic or machine-readable form, in whole or in part, without the prior written consent of Tesoro Electronics Incorporated, except in the manner described in this documentation.
© 2001 Tesoro Electronics Incorporated. All rights reserved. Printed in the United States.

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some good features of garrett ace250 metal detector ace 250

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Garrett Ace 250 metal detector some Key Features are;

  • Accept/Reject Discrimination: to modify discrimination patterns. you can accept and reject series of items with similar conductivity.
  • Five Search Modes: select pre-set discrimination pattern or create your own. Discrimination settings that can help you in deciding when and where to dig.
  • Continuous Coin Depth Indicator: to determine target depth
  • Electronic Pinpointing: to precisely locate target and speed recovery. This feature helps you a lot in narrowing down your detection area and pinpoint the whereabouts of the target.
  • Battery Condition Indicator: shows battery life continually
  • Interchangeable ACE series searchcoils are available for example DD type or Concetric types behave differently and you can interchange many search coils that are available for different applications. Smaller coils help you in getting hard to get areas, and gold nuggets. The bigger coils are better for relic hunting etc..
  • Expanded Target ID Legend: easy-to-read above large LCD screen
  • Pushbutton Controls: with One-Touch operation
  • Other features: 3-piece travel/storage, disassembles to 24 inch adjustablearm cuff; quarter-inch (1/4″) size headphone jack.

Search Modes (Discrimination Patterns): 5 plus electronic pinpointing

  • All Metal (Zero)
  • Jewelry
  • Custom
  • Relics
  • Coins
  • Pinpoint

ACE 250 Metal Detector

Specifications:

Target ID Cursor Segments 12
Iron Discrimination Segments 2
Accept/Reject Discrimination YES
Search Modes 5 (plus Pinpoint)
Sensitivity/Depth Adjustments 8
Electronic Pinpointing YES
Frequency 6.5 kHz
Audio Tone ID Levels 3
Standard Searchcoil 6.5″ x 9″    PROformance™
Length (Adjustable) 42″ to 51″ (1.06m – 1.29m)
Total Weight 2.7 lbs.    (1.2 kgs.)
Batteries 4 AA    (included)
Warranty 2 Year, Limited Parts/Labor
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Garrett ace 250 metal detector features and Specs

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Garrett Ace 250 metal detector Key Features are :Electronic Pinpointing: to precisely locate target and speed recovery Five Search Modes: select pre-set discrimination pattern or create your own Accept/Reject Discrimination: to modify discrimination patterns Battery Condition Indicator: shows battery life continually
Continuous Coin Depth Indicator: to determine target depth Interchangeable ACE series searchcoils: are available Pushbutton Controls: with One-Touch operation Expanded Target ID Legend: easy-to-read above large LCD screen Other features: 3-piece travel/storage, disassembles to 24″; adjustable arm cuff; quarter-inch (1/4″) size headphone jack.  Search Modes (Discrimination Patterns): 5 plus electronic pinpointing

    • All Metal (Zero)
    • Jewelry
    • Custom
    • Relics
    • Coins
    • Pinpoint

ACE 250 Metal Detector

Specifications:

 

Target ID Cursor Segments 12
Iron Discrimination Segments 2
Accept/Reject Discrimination YES
Search Modes 5 (plus Pinpoint)
Sensitivity/Depth Adjustments 8
Electronic Pinpointing YES
Frequency 6.5 kHz
Audio Tone ID Levels 3
Standard Searchcoil 6.5 ” x 9 ” PROformance
Length (Adjustable) 42 ” to 51 ” (1.06 – 1.29 m)
Total Weight: 2.7 lbs (1.2 kg)
Batteries 4 AA ( included )
Warranty 2 Year, Limited Parts/Labor
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more metal detecting terms

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metal detecting and metal detector terms

these are the most commonly used terms by Garrett Metal Detectors

TERM EXPLANATION

All  Metal Mode A metal detector setting that detects  all metal objects, no discrimination metal detecting
Audio Threshold The background audio level produced when  no target is being detected.it is best to adjust the audio threshold to the lowest audible level, and recommended the operator use headphones when treasure hunting
Audio Tone The pitch or frequency of the sound made by a detector. The tone on the GTI 2500, 1500 and GTP 1350 detectors can be adjusted on a treble to bass scale.
Cache Larger deposits of treasure that generally consist of money and valuable objects
Classifier A filtering device, typically found at the head of a sluice, which helps prevent rocks and other large debris from falling into a gold pan.
Coin Shooting Hunting for coins regardless of location or era of coins targeted
Composite Digger Trowel made of durable plastic that helps prevent coin damage during recovery. Ideal for soft terrain
Control Box Contains the detector’s main circuitry,   controls, speaker, batteries and microprocessor chip
DD Searchcoil A special configuration of the transmit and receive coils  to minimize the effects of ground minerals
DSP (Digital Signal A highly advanced computer chip used in Garrett detectors and other sophisticated Processor) electronic equipment
Discrimination The ability of a metal detector to reject a target, such as a pull tab and foil or accept a target such as a coin or jewelry based on its metallic composition
FastTrack (See Garrett’s exclusive technology that analyzes ground mineralization and adjusts to  “cancel” Ground Balance) its effects in a matter of seconds
Frequency The number of times per second the energy transmitted from a detector’s coil changes direction (e.g. 7.0 kHz = 7000 cycles per second) – higher frequencies are typically used to find targets such as gold nuggets, while lower frequencies are best for general purpose hunting.
Gold Pan A bowl-shaped, shallow container that traps gold flakes
Gravity Trap™ A patented gold pan made by Garrett which has 90 degree riffles to trap small gold
Ground Balance An adjustment made to “cancel” or ignore ground mineralization; may be done manually (See GroundTracking) or automatically
Ground Tracking The ability of a metal detector to continuously measure the ground’s mineralization and automatically adjust the detector’s ground balance setting for optimum performance
GTA (Graphic Target Analyzer) Exclusive Garrett technology that visually identifies a target’s conductivity or ID and also shows the discrimination pattern
GTI (Graphic Target Imaging) Exclusive Garrett technology that measures and displays a target’s true size and depth
LCD (Liquid Crystal Display) A graphical display that indicates target information, detector settings, etc…
Multiple Frequency See Pulse Induction and Multiple Frequency article
Microprocessor Computer chip that performs digital functions that make many features such as Target ID and Discrimination possible on today’s Garrett detectors
Mono Searchcoil Refers to searchcoils with one ring where both transmitter and receiver antennae are located
Motion Mode Refers to the setting where coil motion is needed to detect targets
Notch Discrimination Targets above and below these discrimination settings
Pinpoint A mode of operation that allows the operator to detemine the precise location of a target still in the ground
Pulse Induction Used primarily for heavily mineralized environments such as the beach or the gold fields of Australia and is found in many of today’s specialty detectors (See also Multiple Frequency)
PowerMaster Exclusive Garrett feature that increases the detector’s ability to detect deeper and wider – up to 20 percent
Probe A long screwdriver-like device usually made of brass used to penetrate the ground and physically locate a detected target before digging it up
Prospecting Hunting for valuable metals such as gold
Relic Hunting Hunting for targets with historical value, such as old battlefield items or family heirlooms
Salt Elimination A detector’s ability to eliminate the interference of salt mineralization, which adversely affects detection depth and target ID capabilities
ScanTrack A unique Garrett feature that automatically adjusts to the operator’s scan speed to achieve optimum performance
Searchcoil Also referred to as the “coil”, the searchcoil is the flat, typically circular disk swept over the ground to sense the presence of metal in detecting
Sensitivity Generally synonymous with Depth, the adjustment that determines how deep or small a target can be detected – the higher the sensitivity, the greater the detection depth
Shaft The adjustable stem that connects the control box and the searchcoil
Single Frequency Offers greater potential depth capabilities, better discrimination and enhanced target ID under most common soil conditions where most treasure hunting occurs (See Multiple Frequency article for more information).
Super Sluice™ Large 15″ gold pan with 1/2″deep riffles. Traps small gold nuggets up to one ounce and larger in size
Surface Elimination A detectors ability to ignore all targets located on or near the ground’s surface, which is useful in heavy trash areas
Surface Mount PC Board Technology The latest trend in constructing electronic circuit boards
Target Any metallic item sensed by a detector
Target ID Cursor A graphical indication of the target’s probable identity (e.g. coin, gold, pull tab) based on its electrical properties
Volume Control The ability to adjust the loudness of the audible response produced by the detection of a target

 

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Detector pro metal detector headphones

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Detector Pro Headphones for Metal Detectors Different types and applications

The Rattler headphone is designed for the demanding professional electronic prospector and gold nugget hunter. Your safety in the field is crucial and we’re sure you’ll never want to use anything but the Rattler! Have you ever been afraid of not hearing a snake or having someone sneak up behind you because you were wearing sound blocking headphones?

Now you can have the superb Gray Ghost sound and still hear what’s around you. This special headphone lets you hear your detector’s signals through one earcup while your other ear is left uncovered to hear things such as dangerous reptiles and snakes. You still have a volume control and a compatibility switch to enable the headphone to work with various detectors. Our new Rattler headphone has been custom designed specifically for the gold nugget hunter. This headphone is engineered rugged, tough, and made to stand up to outdoor use and have the signal power to hear the smallest nuggets!

Rattler headphone is designed to allow hearing outside noises in one ear thus warning you to dangerous reptiles, snakes and even someone sneaking up behind you. In your other ear, you will get the performance of our famous Gray Ghost line of headphones. Built to satisfy the needs of demanding professional electronic prospectors and gold nugget hunters who frequent areas of dangerous reptiles. We feel your safety in the field is crucial and we’re sure you’ll never want to use anything but the Rattler!

Black Widow is engineered for detectorists with challenged hearing and for hunting environments with high ambient noise levels. Black Widow headphones were designed to accommodate the professional detectorist with special hearing requirements and for environments with high ambient noise levels. Large extended muffs are designed to block ambient noise to a higher degree for huntsites in proximity to urban traffic and surf roar. The Black Widow contains a dual mini-toggle switching system like our famous Gray Ghost Ultimate. One switch provides greater compatibility with detector audio systems and the other switch allows signal limitation when extreme volume is not required. Also provided are two independent volume controls for those detectorists with unequal hearing ability in each ear. You still get our “industry first” quality components, design and construction without compromise. Black Widows are “deadly”, but guaranteed not to “Sting” you!CAUTION: The significant volume output of the Black Widow compared to our main line of headphones requires us to warn the consumer of potential eardrum damage if detector signal is not regulated to tolerant levels. Without the limiting circuit engaged, we recommend starting with a minimal headphone volume control setting with detector volume at maximum, then gradually increase headphone volume controls as needed and tolerated.

Technical Specifications:

  • Dual rotary volume control with “stay put” segmented “click” positioning.
  • Selector switch for metal detector compatibility with all single-output metal detectors without adapters.
  • Heavy-duty muff-to-muff connection cable.
  • Heavy-duty strain relieved coil cable with special 1/4″, 90 degree angle stereo connector.

  • Compact carry and storage foldable design.
  • Heavy-duty polymer muffs with full-ear surround, soft comfortable cushions.
  • Adjustable padded headband… no screws, no wire frame, no rust!
  • Speakers designed for maximum volume, sensitivity, efficiency, durability, and signal quality.
  • Special ultra sound-blocking extended muff design eliminating environmental ambient noise up to 29 decibels.
  • Frequency response: 200 – 3200 Hz… only what your detector uses.
  • Sensitivity: 72 db @ 1 KHz Min.
  • Impedance: 150 ohms nominal.
  • Backed by a limmited lifetime warranty.

Black Widow headphones were created to accommodate the professional detectorist with special hearing requirements and for environments with high ambient noise levels. They have extreme output and noise blocking capacity. Still built with our “industry first” quality components, design and construction without compromise.

Now you can have the superb Gray Ghost sound and still hear what’s around you. This special headphone lets you hear your detector’s signals through one earcup while your other ear is left uncovered to hear things such as dangerous reptiles and snakes. You still have a volume control and a compatibility switch to enable the headphone to work with various detectors. Our new Rattler headphone has been custom designed specifically for the gold nugget hunter. This headphone is engineered rugged, tough, and made to stand up to outdoor use and have the signal power to hear the smallest nuggets!

Technical Specifications:

  • Single rotary volume control with “stay put” segmented “click” positioning.
  • Selector switch for metal detector compatibility with all single-output metal detectors without adapters.
  • Heavy-duty coil cable available with special 1/4″, 90 degree angle stereo connector.

  • Compact carry and storage foldable design.
  • Heavy-duty polymer muff with full-ear surround, soft comfortable cushion.
  • Adjustable padded headband… no screws, no wire frame, no rust!
  • Speaker designed for maximum sensitivity, efficiency, durability, and signal quality.
  • Special sound-blocking muff design eliminating environmental ambient noise up to 24 decibels in one ear only.
  • Frequency response: 200 – 3200 Hz… only what your detector uses.
  • Sensitivity: 72 dB @ 1kHz min.
  • Impedance: 150 ohms nominal.
  • Backed by a limited lifetime warranty.

 

Gray Ghost Logo.jpg (9397 bytes)

Special DMC version designed for use with NautilusTM DMC & Minelab CTX detectors or any two-channel audio equipment that presents different signals to each ear. Relic & Coin Hunters… Give yourself the superb Gray Ghost sound made especially for your Nautilus DMC detectors. Each channel has its own separate limiter and separate volume control. Made especially for Nautilus DMC and Minelab CTX metal detectors.

Technical Specifications:

  • Separate volume control for each channel
  • Heavy-duty muff-to-muff connection cable.
  • Heavy-duty coil cable with special 1/4″, 90 degree angle stereo connector.

  • Compact carry and storage foldable design.
  • Heavy-duty polymer muffs with full-ear surround, soft comfortable cushions.
  • Adjustable padded headband… no screws, no wire frame, no rust!
  • Speakers designed for maximum sensitivity, efficiency, durability, and signal quality.
  • Special built-in signal limiting circuitry on each channel to protect hearing from high volume hits… no batteries!
  • Special sound-blocking muff design eliminating environmental ambient noise up to 24 decibels.
  • Frequency response: 200 – 3200 Hz… only what your detector uses.
  • Sensitivity: 72 dB @ 1kHz min.
  • Impedance: 150 ohms nominal.
  • Backed by a limited lifetime warranty.

Gray Ghost Logo (small).jpg (5694 bytes)

Built upon the solid foundation of the Famous Original Gray Ghost, NDT Means “No Down Time!” 

Gray Ghost NDT HeadphonesDoes this sound familiar… A month of research and you’ve just hiked two miles into the forest after pinpointing an old cellar hole on an old map. You can only afford one set of quality headphones. As you setup your detector and power on, you hear nothing! Suddenly you remember the tree branch that caught and yanked your headphone cord really hard. Luckily you packed mini-phones, but they have an 1/8″ plug and you lost the adaptor! Now you’ll have to settle for using the loudspeaker to hear the deepest old coins, jewelry and relics… That is if your detector has a built-in speaker!If this has happened to you, you already know the value of having a good backup. Our universal GRAY GHOST® NDT headphones are based on the strong features of our already famous Gray Ghost Originals. For the NDT, we have engineered a very rugged detachable cord with a high-quality connector system and we give you TWO complete cords! You can have your choice of cords with two 1/4″ plugs or two 1/8″ plugs… Or you can have one of each size.So next time you plan on a serious day of metal detecting, don’t take chances, bring the GRAY GHOST® NDT.

Technical Specifications:

  • High-quality locking connector system

Gray Ghost High-Quality Locking Connector

  • Dual rotary volume control with “stay put” segmented “click” positioning.
  • Selector switch for metal detector compatibility with all single-output metal detectors without adapters.
  • Heavy-duty muff-to-muff connection cable.
  • Heavy-duty coil cable with your choice of two 1/4″ or two 1/8″ stereo connectors, or one of each size

Gray Ghost NDT Cable Plug Choices

  • Compact carry and storage foldable design.Gray Ghost NDT Compact Fold and Carry
  • Heavy-duty polymer muffs with full-ear surround, soft comfortable cushions.
  • Adjustable padded headband… no screws, no wire frame, no rust!
  • Speakers designed for maximum sensitivity, efficiency, durability, and signal quality.
  • Special built-in signal limiting circuitry to protect hearing from high volume hits… no batteries!
  • Special sound-blocking muff design eliminating environmental ambient noise up to 24 decibels.
  • Frequency response: 200 – 3200 Hz… only what your detector uses.
  • Sensitivity: 72 dB @ 1kHz min.
  • Impedance: 150 ohms nominal.
  • Backed by a limited lifetime warranty.

Gray Ghost Logo (small).jpg (5694 bytes)

The Ultimate Gray Ghost® is our new no-holds-barred category killer headphone.

 Ultimate Gray Ghost Title.jpg (5209 bytes)Ultimate_Gray_Ghost_Phones.jpg (22220 bytes)This is one headphone you have to try for yourself in order to believe. We started with our now famous Original Gray Ghost headphone and added all the custom enhancements our customers have been requesting most. Now you too can have the ultimate sound quality made possible by special speaker elements in a tuned cavity design. This design means greater sensitivity to tiny targets and more raw power at full volume. The Original Gray Ghost’s switch has been removed in favor of more durable push-buttons in shielded locations by the main strain relief. Our special limiter circuit gives you a smooth reduction at excess volume levels, not like our imitators’ noise-inducing clipping effect, and our limiter can be disabled with the touch of a button. Additional new features are an industrial grade nylon 6/6 strain relief at a new neck-hugging angle. This reduces stress on the cable and helps it fall closer to your body for fewer branch snags in the most rugged terrain. Try one and we are sure you will agree that no one has ever built a metal detector headphone anywhere near this clear and this sensitive with as many features as the Ultimate Gray Ghost.

Technical Specifications:

  • Single rotary volume control with “stay put” segmented “click” positioning.
  • Push-button selector switch for metal detector compatibility without adapters.
  • Push-button switch activates limiter.
  • Special low-noise signal limiting circuitry protects your hearing from high volume hits without batteries.
  • Heavy-duty muff-to-muff connection cable.
  • Heavy-duty coiled cord with a special three conductor 1/4″, 90 degree angle stereo connector.
  • Industrial grade Nylon 6/6 pigtail strain relief on cord termination.

Compact_Utimate.jpg (6113 bytes)

  • Compact carry and storage foldable design.
  • Heavy-duty polymer muffs with full-ear surround, soft comfortable cushions.
  • Adjustable padded headband… no screws, no wire frame, no rust!
  • Speaker elements are the ultimate in sensitivity, efficiency, durability, and signal quality.
  • Special sound-blocking muff design eliminating environmental ambient noise up to 24 decibels.
  • Backed by a limited lifetime warranty.

Gray Ghost Logo (small).jpg (5694 bytes)

The Original Gray Ghost is designed for the demanding professional coin, relic, and jewelry hunter. These phones are built by detector people for detector people.

 Original Gray Ghost Title.jpg (5060 bytes)Original Gray Ghost Phones.jpg (22225 bytes)Now for the first time there is a serious alternative to the many headphones available in the past for metal detecting. Our new Gray Ghost® Headphones have been custom designed specifically for metal detector users. Start hearing those “ghost signals” others are missing. Our headphones are engineered rugged, tough, and made to stand up to outdoor use. Gone are the days of wimpy phones that break on the littlest twig… gone are the days when outdoor noise kept you from hearing the deepest targets… gone are the days when headphones wouldn’t stay on your head… gone are the days of discomfort and loss of concentration… gone are the days of frustrating two-knob volume adjustments… and with our special sound limiting circuitry, gone are the days of headaches from too loud hits!

Technical Specifications:

  • Single rotary volume control with “stay put” segmented “click” positioning.
  • Selector switch for metal detector compatibility with all single-output metal detectors without adapters.
  • Heavy-duty muff-to-muff connection cable.
  • Heavy-duty coil cable with special 1/4″, 90 degree angle stereo connector.

Compact Original.jpg (4955 bytes)

  • Compact carry and storage foldable design.
  • Heavy-duty polymer muffs with full-ear surround, soft comfortable cushions.
  • Adjustable padded headband… no screws, no wire frame, no rust!
  • Speakers designed for maximum sensitivity, efficiency, durability, and signal quality.
  • Special built-in signal limiting circuitry to protect hearing from high volume hits… no batteries!
  • Special sound-blocking muff design eliminating environmental ambient noise up to 24 decibels.
  • Frequency response: 200 – 3200 Hz… only what your detector uses.
  • Sensitivity: 72 dB @ 1kHz min.
  • Impedance: 150 ohms nominal.
  • Backed by a limited lifetime warranty.

Gray Ghost DMC

NEW! Attention Relic & Coin Hunters using Nautilus DMC metal detectors… Now you can have the superb Gray Ghost sound in each channel of  your detector controlled by independent volume controls!

Gray Ghost NDT

NDT means “No Down Time!” Built on the solid foundation of the Original Gray Ghost, the Gray Ghost NDT comes with two detachable cables, each with a high-quality locking connector and your choice of plug sizes. Hunt with a new feeling of security!

Ultimate Gray Ghost

The Ultimate Gray Ghost is our second generation premium headphone with the best sound available anywhere. Top treasure hunters in every field have told us the Ultimate Gray Ghost is the new leader of the pack.

Original Gray Ghost

The Original Gray Ghost was our first deluxe headphone and it is still the most popular for the demanding professional coin, relic, and jewelry hunter. These phones are built by detector people for detector people.

Gray Ghost Deep Woods

The Gray Ghost Deep Woods is for die-hard relic hunters or anyone who pushes into the most hostile treasure hunting environments.

 

Gray Ghost Logo (small).jpg (5694 bytes)

The Gray Ghost Deep Woods takes you into the roughest back country.

 Gray Ghost Deep Woods.jpg (6420 bytes)Gray Ghost Deep Woods Phones.jpg (20806 bytes)The Gray Ghost Deep Woods is designed for the die-hard relic hunter. We’ve improved our Original Gray Ghost® to stand up to the most severe abuse. The Deep Woods has no exterior controls, no exposed metal, rainproofing, cable strain reliefs, and nothing to catch on branches. Like the Ultimate, the cable is protected by the best strain relief and improved placement places it along the neck away from branches. Our special limiter circuit gives you a smooth reduction at excess volume levels, not like our imitators’ noise-inducing clipping effect. Our metal detector compatibility and limiter switches are easily accessible on the inside of the cup where they are totally protected.

Technical Specifications:

  • Selector switch for metal detector compatibility without adapters.
  • Selector switch for limiter.
  • Special low-noise signal limiting circuitry protects your hearing from high volume hits without batteries.
  • Heavy-duty muff-to-muff connection cable.
  • Heavy-duty coiled cord with a special three conductor 1/4″, 90 degree angle stereo connector.
  • Industrial grade Nylon 6/6 pigtail strain relief on cord termination.

 Compact Deep Woods.jpg (5657 bytes)

  • Compact carry and storage foldable design.
  • Heavy-duty polymer muffs with full-ear surround, soft comfortable cushions.
  • Adjustable padded headband… no screws, no wire frame, no rust!
  • Speaker elements are the ultimate in sensitivity, efficiency, durability, and signal quality.
  • Special sound-blocking muff design eliminating environmental ambient noise up to 24 decibels.
  • Frequency response: 200 – 3200 Hz… only what your detector uses.
  • Sensitivity: 72 dB @ 1kHz min.
  • Impedance: 150 ohms nominal.
  • Backed by a limited lifetime warranty.

Nuggett Busters Logo.jpg (12544 bytes)

Nugget Busters were designed for the demanding professional electronic prospector and gold nugget hunter. If you’re just getting started in gold hunting, we’re sure you’ll never want to use anything but Nugget Busters! Nugget Buster Phones.jpg (23085 bytes)Our new Nugget Busters headphones have been custom designed specifically for the gold nugget hunter. Start hearing the “whisper signals” others are missing. Our headphones are engineered rugged, tough, and made to stand up to outdoor use. Gone are the days of wimpy phones that break on the littlest twig… gone are the days when outdoor noise kept you from hearing the deepest targets… gone are the days when headphones wouldn’t stay on your head… gone are the days of discomfort and loss of concentration… gone are the days of frustrating two-knob volume adjustments… just wide-open signal power to hear the smallest nuggets!

Technical Specifications:

  • Single rotary volume control with “stay put” segmented “click” positioning.
  • Selector switch for metal detector compatibility with all single-output metal detectors without adapters.
  • Heavy-duty muff-to-muff connection cable.
  • Heavy-duty coil cable with special 1/4″, 90 degree angle stereo connector.

Compact Nuggett Busters.jpg (5965 bytes)

  • Compact carry and storage foldable design.
  • Heavy-duty polymer muffs with full-ear surround, soft comfortable cushions.
  • Adjustable padded headband… no screws, no wire frame, no rust!
  • Speakers designed for maximum sensitivity, efficiency, durability, and signal quality.
  • Special sound-blocking muff design eliminating environmental ambient noise up to 24 decibels.
  • Frequency response: 200 – 3200 Hz… only what your detector uses.
  • Sensitivity: 72 dB @ 1kHz min.
  • Impedance: 150 ohms nominal.
  • Backed by a limited lifetime warranty.

Nugget Busters

Nugget Busters were designed to the specifications of demanding professional electronic prospectors and gold nugget hunters. They are similar to the Original Gray Ghost but without any limiter for wide-open sound. If you’re just getting started in gold hunting, we’re sure you’ll never want to use anything but Nugget Busters.

Nugget Busters NDT

Based on the specifications of demanding professional electronic prospectors and gold nugget hunters. They are similar to the Gray Ghost NDT but without any limiter for wide-open sound. Engineered for No Down Time in the field from cord breakage.

 

Built upon the solid foundation of the Famous Original Gray Ghost, NDT Means “No Down Time!” 

 Does this sound familiar… A month of research and you’ve just hiked a mile into the desert after pinpointing an old claim site on an old map. You can only afford to carry one set of quality headphones. As you setup your detector and power on, you hear nothing! Suddenly you remember back at the car when the door caught and yanked your headphone cord really hard. Luckily you packed mini-phones, but they have an 1/8″ plug and you lost the adaptor! Now you’ll have to settle for using the loudspeaker to hear the deepest nuggets, old coins and relics… That is if your detector has a built-in speaker!If this has happened to you, you already know the value of having a good backup. Our universal Nugget Busters NDT® headphones are based on the strong features of our already famous Gray Ghost NDT®. For the Nugget Busters NDT, we have engineered a very rugged detachable cord with a high-quality connector system and we give you TWO complete cords! You can have your choice of cords with two 1/4″ plugs or two 1/8″ plugs… Or you can have one of each size.So next time you plan on a serious day of metal detecting, don’t take chances, bring the Nugget Busters NDT.

Technical Specifications:

  • High-quality locking connector system

  • Dual rotary volume control with “stay put” segmented “click” positioning.
  • Selector switch for metal detector compatibility with all single-output metal detectors without adapters.
  • Heavy-duty muff-to-muff connection cable.
  • Heavy-duty coil cable with your choice of two 1/4″ or two 1/8″ stereo connectors, or one of each size

Gray Ghost NDT Cable Plug Choices

  • Compact carry and storage foldable design.
  • Less reflective muff color
  • Heavy-duty polymer muffs with full-ear surround, soft comfortable cushions.
  • Adjustable padded headband… no screws, no wire frame, no rust!
  • Speakers designed for maximum sensitivity, efficiency, durability, and signal quality.
  • No limiting circuitry for loud wide-open signaling.
  • Special sound-blocking muff design eliminating environmental ambient noise up to 24 decibels.
  • Frequency response: 200 – 3200 Hz… only what your detector uses.
  • Sensitivity: 72 dB @ 1kHz min.
  • Impedance: 150 ohms nominal.
  • Backed by a limited lifetime warranty.

Jolly Rogers Logo.jpg (9532 bytes)

Our NEW Jolly Rogers Ultimates have added features usually found only on more expensive headphones. Built upon the foundation of our popular original Jolly Rogers headphones, we now introduce the Jolly Rogers Ultimates! You get the same rugged construction and quality as the originals, but now with added features like Dual Volume controls and our famous Limiter Switch that reduces the volume of excessively loud signals. Our special limiter circuit gives you a smooth reduction at excess volume levels, not like our imitators’ noise-inducing clipping effect. Our limiter can be disabled with the click of a toggle. You’ll like the way these headphones cover your entire ear comfortably and block out ambient noise allowing you to hear the faintest signals. You’ll like the solid feel of the comfortable headband to earcup adjustment and the fact there are no parts to rust or corrode. You’ll like the feel of the soft earcup cushion material against your head. You’ll like our segmented volume adjustment controls that stay put where you want them to be. You’ll like the way Jolly Rogers fold up to take less space in your equipment bag or case. Last but not least, you’ll love the solid performance of Jolly Rogers Ultimates headphones and the fact that they are protected by a limited lifetime warranty!

Technical Specifications:

  • Dual-rotary volume control with “stay put” segmented “click” positioning.
  • Limiter Switch for reduction of excessively loud target signals.
  • Selector switch for metal detector compatibility with all single-output metal detectors without adapters.
  • Heavy-duty muff-to-muff connection cable.
  • Heavy-duty coil cable with special 1/4″, 90 degree angle stereo connector.

  • Compact carry and storage foldable design.
  • Heavy-duty polymer muffs with full-ear surround, soft comfortable cushions.
  • Adjustable padded headband… no screws, no wire frame, no rust!
  • Speakers designed for maximum sensitivity, efficiency, durability, and signal quality.
  • Special sound-blocking muff design eliminating environmental ambient noise up to 20 decibels.
  • Frequency response: 150 Hz – 20 kHz… only what your detector uses.
  • Impedance: 16 ohms nominal.
  • Backed by a limited lifetime warranty.

Jolly Rogers Ultimates

NEW Jolly Rogers Ultimates have Dual Volume Controls and our famous Limiter Circuit. Everything you love about our original Jolly Rogers, but now with more features usually found only on more expensive headphones!

Jolly Rogers

Jolly Rogers are smaller and lighter but still engineered tough for the beginner and the professional coin, relic, gold nugget, and jewelry hunter.

 

Jolly Rogers Logo (small).jpg (7496 bytes)

Jolly Rogers are engineered for the beginning and professional coin, relic, gold nugget, and jewelry hunter.

Jolly Rogers Title.jpg (3807 bytes)Jolly Rogers Phones.jpg (24019 bytes)Have a Jolly Good Time finding treasure with our new Jolly Rogers metal detector headphones. By “Jolly Good Time” we mean you’ll find them super comfortable, adjustable, and they just plain stay on your head! In fact, Jolly Rogers headphones have the same rugged construction as our now famous, full-featured professional Gray Ghost headphones. You’ll like the way these headphones cover your entire ear comfortably and block out ambient noise allowing you to hear the faintest signals. You’ll like the solid feel of the comfortable headband to earcup adjustment and the fact there are no parts to rust or corrode. You’ll like the feel of the soft earcup cushion material against your head. You’ll like our segmented volume adjustment control that also stays put where you want it to be. You’ll like the way Jolly Rogers fold up to take less space in your equipment bag or case. Last but not least, you’ll love the solid performance of Jolly Rogers headphones and the fact that they are protected by a limited lifetime warranty!

Technical Specifications:

  • Single rotary volume control with “stay put” segmented “click” positioning.
  • Selector switch for metal detector compatibility with all single-output metal detectors without adapters.
  • Heavy-duty muff-to-muff connection cable.
  • Heavy-duty coil cable with special 1/4″, 90 degree angle stereo connector.

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  • Compact carry and storage foldable design.
  • Heavy-duty polymer muffs with full-ear surround, soft comfortable cushions.
  • Adjustable padded headband… no screws, no wire frame, no rust!
  • Speakers designed for maximum sensitivity, efficiency, durability, and signal quality.
  • Special sound-blocking muff design eliminating environmental ambient noise up to 20 decibels.
  • Frequency response: 150 Hz – 20 kHz… only what your detector uses.
  • Impedance: 16 ohms nominal.
  • Backed by a limited lifetime warranty.

 

Designed for detectorists who want an economical alternative to our professional line.

NEW! Now Available!

Treasure EarsTM stereo headphones were designed to accommodate the detectorist who desires a lightweight comfortable headphone with a price point below our professional grade phones.

Technical Specifications:

  • Designed in the U.S.A.
  • Excellent sound quality for metal detecting
  • Separate volume control for each ear
  • Comfortable lightweight design
  • Adjustable headband with Stainless Steel frame
  • Coiled cord for easy extension
  • 1/4″ right-angle plug
  • Built with quality materials
  • Speakers designed for maximum sensitivity
  • Power Output: 100 milli-watts
  • Impedance: 32 Ohms
  • Sensitivity: 105 db
  • Cord Length: 6 ft. (extended)
  • Backed by a 1 Year Warranty

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Lowest Metal Detector Sale Prices

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How Search Coils Work, and what types they are.

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SEARCHCOIL BASICS SEARCH COILS DEPTH The detection depth of a searchcoil, as a rule-of-thumb, will be approximately equal to its diameter, for a coin-sized object. However, as a searchcoil’s size increases and its field pattern becomes larger, the field pattern becomes less concentrated and begins to miss small objects. For a coin-sized object, this effect becomes noticeable when using searchcoils larger than about 15” in diameter. Since the field generated by a large searchcoil is larger, deeper and less concentrated than a small searchcoil, it is the best choice when hunting for targets that are usually large and deeply buried, such as caches or relics.

The searchcoil is a vital part of your metal detector. It is the flat, typically circular disk, which generates a magnetic field and senses metallic targets in the surrounding environment. It is located at the end of the stem and is connected to the control housing via a cable normally wound around the stem. The size and depth of the magnetic field is determined by the shape and size of the searchcoil. Understanding the purposes behind the various sizes and shapes of searchcoils will empower you with the ability to choose the best searchcoil for each application.
HOW SEARCHCOILS WORK
DetectionNet Metal Detectors Here

Searchcoils generally consist of two internal sets of coiled wires, a Transmit Coil (TX) and a Receive Coil (RX). Mono coils can be different in that one coil acts as both the TX and the RX. When the detector is turned on, the TX coil generates a magnetic field in the surrounding space.

When a metallic object is within this generated magnetic field, it will create a distortion in the magnetic field. The RX coil will sense this distortion and send a signal to the control housing.

A searchcoil’s detection pattern is determined by the combination of the TX’s generated field pattern and the RX’s sensing field pattern.

SIZES & SHAPES

There are a variety of searchcoil sizes and shapes. The correct one to use depends on the environment it will be used in as well as the targets being sought. A change in any one of these variables may require a different searchcoil.

Generally, searchcoils are circular or elliptical in shape. An elliptical searchcoil is more maneuverable than a circular searchcoil and its narrow width actually provides greater coverage than a circular coil due to its elongated length. However, a circular searchcoil has slightly more detection depth and sensitivity in non-mineralized soil, so it is still the most commonly used shape. Searchcoils also come in a 2-box configuration, which are used for detecting deeply buried targets.

Searchcoils range in diameter from a few inches to several feet. Those less than 6” in diameter are generally considered small, 6-11” in diameter are considered medium and over 11” are considered large. As noted earlier, there is a direct relationship between the size of a magnetic field and the size of a coil. The bigger the coil, the larger the magnetic field. Therefore, larger searchcoils generally detect deeper than smaller searchcoils.

Small Searchcoils

Because the magnetic field of a small searchcoil is concentrated within a small volume, it is the best choice for hunting in areas with a lot of metal debris. This allows you to maneuver through and around trash to locate good targets, especially when searching in tight places where large searchcoils cannot go. In addition, because of their concentrated detection field, small searchcoils are the best for detecting very small objects. However, a small searchcoil provides less coverage per sweep; more scans will be required to cover a search area.

Medium Searchcoils

For general-purpose hunting, which typically includes coins and coin-sized targets, a medium sized searchcoil (8 – 9”) is the best choice. Because a medium sized searchcoil provides the best combination of magnetic field concentration, detection depth and capability to detect the greatest range of target sizes within the detection area, it is standard with most detectors. In addition, it’s lightweight and easy to maneuver.

Large Searchcoils

Large searchcoils generate wider and deeper magnetic fields than small coils and consequently provide greater depth and coverage. This means that scanning a search area requires fewer sweeps with a large searchcoil than with a smaller coil. This larger scan area, however, can become a problem in trashy areas where the searchcoil is metal detecting several targets at once.

CONFIGURATIONS

In addition to searchcoil sizes and shapes, there are also a variety of searchcoil configurations available, with each proving to be the best choice depending on hunting applications and ground conditions. The configuration of a searchcoil refers to the arrangement of the TX and RX coils within the searchcoil shell. There are basically five configurations: Concentric, Mono, Imaging, Double-D and 2-box.
Concentric Searchcoil

Concentric

The concentric configuration consists of a TX coil and RX coil which are usually circular and arranged as shown at left. The advantage of this configuration is that both the TX and RX coils are wound as large as possible within a given searchcoil diameter. This provides the largest possible detection field and greatest detection depth, making the concentric coil potentially the most sensitive configuration available.

In addition, concentric coils also provide the most symmetrical detection field, allowing ease in pinpointing and consistency in target identification. For these reasons, they are the most commonly used searchcoil and will provide the best overall performance in most environments.

Unfortunately, this configuration is the most susceptible to interference from ground minerals, which results in substantial loss of performance when used over heavily mineralized ground.

Mono

A mono-coil is available only on Pulse Induction detectors and is a variation of the concentric configuration. The mono-coil can be manufactured with the TX and RX coils located together or as a single coil acting as both TX and RX.

The detection and performance characteristics of the mono are essentially the same as the concentric in that it provides the maximum possible sensitivity, but suffers some performance in mineralized ground.

Imaging

An Imaging searchcoil is an enhanced version of the concentric configuration that features an additional RX coil. This extra coil provides the detector with additional target information necessary for true target-depth perception and true target-sizing capabilities.With this additional sizing information, the detector can more fully characterize a target and for the first time distinguish between trash and good targets of the same conductivity (e.g. a quarter vs. a soda can). Only Garrett’s GTI series offers this technology; no other detector in the world has this capability.

2-Box

In a 2-box configuration, the TX and RX coils are physically several feet apart. This configuration provides a lightweight, manageable means of achieving the performance of a 3′ to 4′ diameter searchcoil. Because of its large size, and consequently large detection field, the 2-box is the best choice for detecting large, deeply buried objects such as relics and caches. Also, because of its large detection field, it ignores objects smaller than about 3″ in diameter. This characteristic is advantageous when hunting in areas heavily littered with small trash objects.

There’s also an enhanced version of the 2-box, only available from Garrett. It is the Treasure Hound with Eagle-Eye pinpointing. This version incorporates an additional pinpointing coil for precise target location.

Double-D

The Double-D configuration is designed to significantly reduce ground interference and, thereby, recover the performance lost by a concentric coil over mineralized soil. With the Double-D, it is the arrangement of the TX and RX coils that produce a canceling effect of ground signals.

This configuration is called DD because both TX and RX coils are in the shape of a “D”. The positive detection field of the DD runs beneath the overlapping center section from front-to-back. The remaining portion of the coil actually produces negative (i.e. canceling) detection fields. It is this canceling field that allows the DD coil to maintain performance over mineralized ground.

Because of its small positive detection field, the DD is inherently less sensitive than a concentric searchcoil of the same size, over non-mineralized ground. The Double-D will, however, significantly outperform the concentric coil over mineralized ground. For this reason, it is highly recommended when hunting over mineralized ground commonly found when prospecting and relic hunting.

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Features of Garrett Ace 150 metal detector

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Features of Garrett Ace 150 metal detector. Garrett Ace 150 Metal Detector has Coin Depth Indicator to determine target depth it also has Low Battery Indicator: icon remains on when batteries become weak, you can use Headphone Jack: quarter-inch (1/4″) size. the search coils of it are interchangeable, Interchangeable ACE series searchcoils: are available. The display of it is Large LCD Screen with easy-to-read Target ID Legend, the Pushbutton Controls: with One-Touch operation 3-piece Travel/Storage: disassembles to 24″. it has Adjustable Arm Cuff

Garrett Ace 150 metal Detector is the very first of “New version Ace series” introduced.

Search Modes (Discrimination Patterns): 3

  • All Metal (Zero)
  • Jewelry
  • Coins
Design features and specifications are subject to change without notice.

Specifications

Target ID Cursor Segments    5
Iron Discrimination Segments 1
Accept/Reject Discrimination     NO
Search Modes 3
Sensitivity/Depth Adjustments     4
Electronic Pinpointing NO
Frequency 6.5    kHz
Audio Tone ID Levels 3
Standard Searchcoil 6.5″ x 9″ PRO-formance
Length (Adjustable) 42″ to 51″1.06m – 1.29m
Total Weight      2.7 lbs. (1.2 kg)
Batteries: 4 AA (included)
Warranty 2 Year       Limited Parts/Labor

Ace 150 seems to be the lowest cost very durable metal detector among major brands to get. The features of it is up-to-date and can match, the top of line of many other brands. It is a very light metal detector and looks very easy to use. People who do not like displays can simply turn on a go and avoid even using the screen. It would perfectly work and will find you coins, jewelry and hidden treasures. The discrimination mode makes it very easy to use it in the public parks because it rejects trash.

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troubleshooting metal detectors is easy to do

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Here are some troubleshooting hints that will help you fix issues that might arise.

TroubleshootingThere are some common issues that many hobbyists experience that are universal to all makes and models of metal detectors. Here are a few proven remedies to some of these common symptoms.
SYMPTOM SOLUTIONS

No power, this means that either the batteries are not in correction position or are too old and need to be changed.

1. Ensure batteries are installed in the correct position.

2. Replace all old batteries with all new batteries.


Erratic sounds or Target IDcursor movement

1. Ensure your searchcoil is securely connected and the coil is tightly wound around the stem 2. Ensure you are not using the detector indoors or where excessive amounts of metal are found 3. Reduce your sensitivity setting 4. Determine if you are close to other metal detectors or other metal structures such as electrical power lines, wire fences, benches, etc.(NOTE: Iron targets may cause erratic sounds or Target ID Cursor movement. You can identify iron targets in an All-Metal Mode)


Intermittent Signals Intermittent signals typically mean you’ve probably found a deeply buried target or one that is positioned at a difficult angle for your detector to read. Increase the sensitivity on your detector and scan from different directions until the signal becomes more definite. In the case of multiple targets switch to the All-Metal Mode or press PINPOINT to precisely locate all targets.(NOTE: Iron targets may cause Intermittent Signals. You can identify iron targets in an All-Metal Mode).

I’m not finding specific targets Ensure you are using the correct mode for the type of hunting you are doing. If you are hunting for coins, ensure you are in the COINS mode. You may also use the All-Metal mode, which detects all metal targets to ensure desired targets are present.
Target ID Cursor bounces If your Target ID Cursor bounces erratically, chances are you’ve found a trash target. However, a Target ID Cursor may bounce if a good target (such as a coin) is not parallel to the searchcoil (e.g. on edge). It may also bounce if there is one or multiple “junk” targets laying next to the good target. Scan from different directions until your Target ID Cursor becomes more stable.

 

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Garrett AT GOLD VS AT PRO Metal Detectors Comparision Chart

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Garrett At Gold and At Pro Metal Detectors Comparison chart below. This chart will help you understand the difference between these two metal detectors which look alike.  At pro is mostly used toward coin hunting, relics, beach, jewelry. On the other hand At gold is mostly used for gold nugget prospecting.

COMPARISON CHART:
  AT GOLD AT PRO
True All Metal Mode
Yes
Notch Discrim (adjustable)
Yes
Notch Discrim (fixed)
Yes
Operating Frequency
18 kHz 15 kHz
Proportional Audio
Yes Yes
Tone Roll Audio™
Yes Yes
Standard Binary Audio
Yes
Fast Recovery Speed
Yes Yes
Iron Audio™ (Disc. modes)
Yes Yes
Iron Audio™ (All Metal)
Yes
Threshold Adjustment
Yes
High Resolution Iron Discrimination™
Yes Yes
Digital Target ID
Yes Yes
Ground Balance, Auto/Manual
Yes Yes
Ground Balance Window™
Yes
Waterproof to 10 feet
Yes Yes
  • Freshwater use
Yes Yes
  • Saltwater use
Yes

At Gold will work fine in fresh water beaches, but salt water beaches might be too sensitive for it and it will cause problems, since salt is conductive and behaves like metallic objects when ionized. At pro on the other hand has better circuitry to handle salt beaches, the frequency is lower so it goes deeper for coins.

Amazingly, we notices that At Gold works better on chains. Gold chains are very hard to detect by any detectors. So if you are planning to use At Gold on fresh water beaches (not salt water beaches) you might have better luck than others.

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