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Teknetics 8000

NOTE: The following manual was scanned with OCR software. Be aware that there may be a few misspellings or anomalies due to the inaccuracies of the software translation. Images are excluded due to the memory requirements; therefore, there will be references to illustrations that do not exist in this text only document.


"Advanced Professional Metal Detector Featuring Audio Target Identification"

Owners Manual

Copyright ©1982, Teknetics, inc

Printed In U.S.A.



Teknetics is a corporation formed by individuals who are dedicated to the premise that the products they manufacture should have lasting quality, the latest in design technology and the maximum range of features that can be obtained for your money.

With these goals in mind, from its first inception, your detector was designed by an engineering group which has many years invested in the field of detectors, having already designed the major innovations in use by other manufacturers.

By carefully reading the instructions in this manual, you will obtain all of the advantages designed into your instrument, but the best performance can only be achieved by practice until you are proficient enough to be able to identify even the slightest variation in target response.




Applications & Limitations



Alternate Batteries

Checking Battery Condition

Glossary of Terms

Identification of Controls

ATI & Meter Display


Ground Balancing

Ground Balance Discriminate

Target Identification

Depth Reading


T.R. Discriminate

Long Time Constant Mode

Push Button Operation

Field Application

Tips on Operation

Detector Care & Service


Six Year Limited Warranty

A Peek Inside



Metal detectors are used to locate unseen metallic objects. Such desirable objects include coins, rings, watches, pistols, rifles, relics, etc... Metal detectors will not sense nonmetallic objects such as wood, paper, plastics, or cloth.

The following is a list of uses, but is not limited to these uses exclusively.

COINSHOOTING - A hobby devoted to locating coins in parks, school) yards. beaches and other areas where the public is likely to lose money. Some specialize in- only digging on weak signals in creasing the likelihood of finding older, more valuable able coins that are usually silver.

F/RELIC HUNTING - Areas involved in past wars, such as the civil war. Indian campaigns, etc.... p vide many articles From the past such as cannon balls, mini balls, shells. guns, medals swords, uniform lore buttons, knives. etc.... Other- areas lo locate articles of history would include old mining towns and areas occupied by early settlers.

PROSPECTING - Searching washes and gullies or old tailings from mines has often revealed nuggets of gold. From time to time even very large nuggets weighing many ounces are reported being found with metal detectors.

BEACH COMBING - Along beaches visited by people everywhere are to be found coins, watches, rings, bracelets, portable radios, etc... And the digging is easy!

SURVEYING - Iron stakes established in earlier surveys can be more easily located, especially when overgrown with weeds, and covered with debris.

LOGGERS - Nails, spikes, etc., can be easily located before costly damage to an expensive blade and eliminate danger to the operator.

LAW ENFORCEMENT - Using a metal detector to systematically sweep suspected areas for discarded weapons or stolen property is a common practice today.

PIPES AND CABLES - Before causing damage, a metal locator can be used to determine the location of buried pipes and cable prior to digging.

These are just a few of the many possibilities. Areas to search are limited only by your imagination.


Carefully unpack your detector and check to see that you have all the parts shown.

Assemble the detector by placing the lower rod into the upper rod. Wrap the cable around the rod and connect to the loop plug on the case as shown.

Note: At this time you may need to charge the batteries.


Your new Teknetics detector is equipped with factory installed rechargeable Nickel Cadmium batteries which will save many hundreds of dollars in battery purchases as they may be recharged as many as a thousand times or more.

The batteries will require charging for a period of 14 to 16 hours to bring them to full capacity, as they are shipped in the unit only partially charged. It is not necessary to remove the batteries to recharge them. Simply plug the charger cable into the charger socket on the rear of the instrument and plug the charger into an electrical outlet. Once charged, a minimum of seven hours continuous use can be expected.

Nickel Cadmium batteries can develop a memory pattern limiting their available capacity. If they are used in the instrument, for example, for two hours each time and then recharged, the capacity will be reduced to this amount. Should this happen, recharge the batteries and use the instrument until it will no longer operate and then recharge.

There are two charge modes available. For normal charging set the POWER switch to "Norm". If the batteries are completely discharged, 14 hours of charge time is required to fully charge. For a partial charge a good rule of thumb is two hours charge time for each hour of use.

The second mode of charging is for storage. Once the cells have been fully charged, the Power switch can be set to the 'Store" position. In this mode, the unit will receive a small "Trickle" charge that will keep the batteries at full charge. This way the instrument is ready to use at all times with full capacity available.

The "store" charge is intended for short term storage and should be used no longer than two to three months at a time.


Fourteen (14) 1 1/2 volt AA Penlight Alkaline batteries may be used instead of the NiCad supplied if they are in need of charging and time is not available to wait.

Remove the compartment doors on the bottom of the case and remove the cells being sure to store them so they will not short. Install the Alkaline cells according to the legend for + and -.

CAUTION: DO NOT CONNECT THE CHARGER TO THE INSTRUMENT WITH ANY BATTERIES INSTALLED EXCEPT NiCads. There is danger of explosion which may result in not only damage to the instrument, but also personal injury.


To check the condition of the batteries installed in the detector, turn the "POWER" switch to "ON" and the "DISPLAY" switch to "A" Batt for the "A" batteries, and to "B" Batt for the "B" batteries. Fully Charged batteries will read full scale on the meter. After the first few minutes of operation, NiCads will drop to approximately 70 on the meter scale and remain at that level for the duration of the charge. 1.5 Volt Penlight Batteries (Alkalines) will show a gradual decline in voltage during their operating life. Recharge your NiCads or replace your 1 l/2 volt cells when the batteries read in the RED zones.


To check the condition of the batteries installed in the detector, turn the "POWER" switch to "ON" and the "Batt. Ck/A.T.I" switch to "A" Batt for the "A" batteries, and to "B" batt for the "B" batteries.

Fully Charged batteries will read full scale on the meter. After the first few minutes of operation, Nl-Cads will drop to approximately 70 on the meter scale and remain at that level for the duration of the charge. 1.5 Volt Penlight Batteries Alkalines) will show a gradual decline in voltage during their operating life.

Recharge your NiCads or replace your 11/2 volt cells when the batteries read in the RED zones.



1. Threshold Tone - Barely audible tone set by the "TUNER" control to achieve the best sensitivity to a metal object.

2. Neutral Response - Indicates no change in threshold tone.

3. Negative Response- Indicates reduction or loss of tone.

4. Positive Response - Indicates an increase in tone.

5. Disc. - Abbreviated term for discrimination. Discrimination allows the detector to selectively reject certain metal objects or "junk".

6. G.B. Disc. - Abbreviated term for Ground Balance Discriminate. This mode allows both ground neutralization and selective discrimination at the same time.

7. G.B. - Abbreviated term for Ground Balance. Ground Balance is achieved by adjusting the "GND BALANCE" control for the neutral response to the mineral content in the ground.

8. G.B. Max. - Abbreviated term for Ground Balance Maximum. This mode is the same as the G8 Mode but with increased sensitivity.

9. T.R. Disc. - Abbreviated term for Transmit Receive Discriminate. This is a non-ground canceling discriminate mode.

10. Target ID - Target Identification, used in any Mode, to identify detected metal objects.

11. Target - Refers to any object sensed by the detector.

12. CW - Clockwise

13. CCW - Counterclockwise

14. Mineralization · Refers to soils containing ferric oxides or magnetic particles.

15. Halo Effect - Certain metals, when buried for long periods, oxidize and leech into the surrounding soil. This results in a 'metallic halo' around the buried object.

16. A.T.I. - Abbreviated term for Audio Target Identification.

17. NonF. - Abbreviated term for Nonferrous. This A.T.I. mode gives a negative (quiet) response to iron objects only.

18. Vari.- Abbreviated term for Variable. This A.T.I. mode gives a negative response to any metal object being discriminated against by the GB DISC setting.


1. Push Button · Used for retuning and temporary mode selection.

2. Meter Display · Provides target identification and depth. Also displays battery condition.

3. Tuner · Adjusts "Threshold" setting.

4. Mode · Selects primary mode of operation.

5. Target ID · Selects degree of sensitivity for all modes except the normal "GB" mode.

6. GND Balance · Adjusts the detector to "balance" out or neutralize ground mineralization.

7. TR Disc. Adjust · Selects the level of TR discrimination desired by the operator.

8. Power · Turns the detector on and off and selects charge mode.

9. Batt. Ck./A.T.I. Selects display of "A" or "B" battery condition or the A.T.I. mode of operation.

10. GB Disc/Tone - Selects the level of GB discrimination and the A.T.I. reference pitch when operating in the GB disc mode. Acts as a tone control in all other modes.



The Teknetics 8000 is a remarkably advanced and precision engineered metal detector. It features the very latest advancements in metal detector technology.

The amazing "CoinComputer" 8000 incorporates a unique Audio Target Identification and meter readout. Buried "Targets" can now be identified by their tone response. Simply set the "reference pitch" with the GB DISC/TONE control and "Hear" the difference between coins and trash. In most cases only one sweep over the target is required for proper identification. The meter display provides a truly phenomenal wealth of information to the TH'er. A glance at the meter will tell you with a great deal of accuracy what the find may be. The meter can also indicate the depth at which coin sized objects are buried, and is used to display battery condition.

NOTE: The meter is scaled such that the marked off areas represent the most likely meter reading for a particular object. However, there may be some overlapping of target readings into adjacent areas due to such things as the "Halo Effect". Over a period of time you will begin to recognize where certain targets tend to register on the T.I. scale.


TOP BAND: Coins & Trash

2nd BAND: 0-100 Scale

3rd BAND: Depth Scale

4th BAND: Battery Check


Proper tuning and ground balancing is essential in order to achieve optimum performance from your metal detector. "Tuning" means: First adjusting your detector to its "Threshold" and second, adjusting or "balancing" out the ground mineralization at the site to be searched.

Start by setting the "Threshold" as follows:

CAUTION: Be sure the loop is at least three feet away from any metal area, and that your batteries are fully charged.

Set the controls as shown on page 13.

Press and hold in the push button on the handle and slowly increase the TUNER clockwise until a barely audible tone is heard. Release the push but ton. The detector is now turned to it's "Threshold". Passing a coin near the loop will cause an increase in the tone and volume. Once set, should the threshold change for any reason, other than actually changing the TUNER control, it can be reset by momentarily pressing the push button. Retuning to threshold is one function of the push button, the other is mode changing -- more on this later.


The objective of "ground balancing" is to adjust the GND BALANCE control to a point at which the Tuning Threshold does not change as the loop is lowered to ground level. Mineralization present in the soil will cause the threshold tone to go up or down until the detector is properly ground balanced. To ground balance the detector, hold the loop about three feet above the ground. (The detector should be "ON" and adjusted to the tuning "Threshold" as previously instructed). The mode switch must be set to GB or GB Max when ground balancing the detector. Lower the loop to within approximately one inch of the ground. As the loop nears the ground, listen to hear whether the threshold volume increases or decreases. If the volume decreases, raise the loop back up and increase the GND Balance Control (clockwise). If the volume increases, decrease the GND Balance Control (counterclockwise). Press and release the push button to retune after changing the GND Balance control. Lower the loop back to the ground again and listen for a change in the threshold volume. This must be done as many times as necessary until there is no change in the threshold with the loop near the ground or in the air.

NOTE: If there is difficulty in making the adjustment, you may be over a hidden metal object. Move to another area and try again.


The G.B. Disc. Mode is a ground balanced discriminate mode. This mode relies on motion (sweeping the target) in order to function properly.

To use the G.B. Disc. Mode, start with the instrument tuned and ground balanced as described earlier. Next, set the controls as shown:






Sweep the loop over the search area as shown. Iron objects will cause a negative response. Nonferrous metals such as foil, coins, and pull tabs will each respond with a different pitch change in the tone. When the detector responds to a good target, switch the Mode control back to GB for pinpointing. GB can also be selected by pushing in and holding the push button.

NOTE: The discriminate adjust setting determines whether certain metal objects will cause a positive or negative audio response when the A.T.I. switch is set to "Vari." For example, when set to reject pull tabs -- nails, foil, and nickels will cause negative audio response.


The Teknetics 8000 incorporates a unique method of identifying buried metal targets -A.T.I. - Audio Target Identification. To use A.T.I. start with the detector properly tuned and ground balanced in the GB Mode. Set the mode switch to GB DISC., and select one of the "A.T.I." modes -- the "NonF" mode gives a negative (quiet) response only to iron and a positive tone of a certain pitch corresponding to different types of non ferrous metals such as foil or coins. The "Vari" mode functions more like a standard discriminator in that any object being discriminated against will cause a negative response. Objects not being discriminated against will respond with a good positive tone which changes in pitch depending on the particular target. Once the A.T.I. mode has been selected, the GB DISC/TONE control can be set to the desired level of discrimination. The A.T.I. reference tone is automatically set at the same time. Proceed to search the area. When a target is located simply sweep the loop back and forth over the target and listen to the corresponding pitch change or - stop after a couple of sweeps and look at the meter. The probable target will be indicated on the meter scale. As an example sup pose you have set the detector to operate in the "GB DISC" mode with A.T.I. NonF and you want to "hear" the difference between foil, nickels, and pull tabs. The audio pitch that corresponds to nickels can be used as the "reference pitch". To set the reference pitch -wave a nickel past the loop and at the same time adjust the GB DISC/TONE control (around 3 on the dial) until you hear only an increase in volume and no change in pitch. Now as you are searching in GB DISC Iron will cause the sound to go quiet. Foil will cause an Increase in volume and a decrease in pitch. A nickel will cause an increase in volume with no change in pitch A pull tab will cause an increase in volume and pitch and a dime will cause an increase in volume and have a much higher pitch than that of the pull tab.

NOTE: The Target Identification circuit is calibrated for areas that ground balance in the "Blue" colored region of the GND BALANCE control. This gives the most accurate readings for most areas of the country. If however the area you are hunting "Balances" much higher or lower on the dial, simply make note of where certain targets tend to read on the numbered meter scale. As an example quarters may read slightly lower - say "75" instead of "80" on the scale. The distributor for your area can also provide additional help if needed.


The depth scale of the meter indicates the depth of a single coin up to six inches deep.

Once a good target has been located, press and release the push button to reset the depth scale. Then place the loop on the ground directly over the target (you will be centered over the target when the meter shows closest distance to the target).


The sensitivity switch controls the sensitivity of all modes of operation except "GB" normal. The "Low" setting can be used to decrease the sensitivity of the detector for "TR DISC" operation In mineralized soil or to use the GB DISC mode during competition treasure hunts (to help cut out interference from other nearby detectors). The "Med" setting can be used when only a slight decrease in sensitivity is needed. Often this slight decrease will help to reduce interferences or mineralization problems. The "High" setting should normally be used for the best sensitivity when operating in any of the GB modes or when using the TR DISC. mode in a non-mineralized area.


The TR Disc mode can be used on beaches, In houses, or other areas where mineralization Is not present. The TR Disc mode will not cancel the effects of mineralized soil.

With the loop in the air, adjust the threshold as described earlier. Lower the loop to the ground. Press and release the push button to retune. Keep the loop level and at the same height above the ground while searching. If the ground causes an erratic response - turn the sensitivity switch to a lower setting. Good targets will cause a sharp positive signal while bad targets will cause a negative response depending on the Disc. adjust setting.


As mentioned earlier, the push button is used to "Retune" by momentarily pressing it. The push button can also be used change modes.

As an example if the mode switch is set to the GB Mode, pushing in on the push button and holding it in will switch the detector to it's GB Disc. Mode until the button is released.

The push button can also be used as an aid in pinpointing. As the loop is moved nearer the target, pressing & releasing the push button detunes the target signal making it easier to pinpoint.

NOTE: When detuning to pinpoint, the depth reading will not be accurate.


The push button is also used to switch the detector ID circuitry into a long time constant (requiring several sweeps) for much greater target identification accuracy. this may be helpful when trying to identify deeply buried targets or in other instances requiring more reliable readings. to use, set the "MODE" switch to GB or GB Max. Next press and hold the push button in and sweep the target several times until a stable target identifying pitch change is reached. With the button still held in - stop sweeping and look at the meter for a visual display of the probable target. Releasing the button will reset the meter. Most iron will give a low pitch indication when using the long time constant method of Target ID.


COIN HUNTING: Coin hunting, or coinshooting as it is sometimes called, is the use of a metal detector to locate coins and small jewelry wherever people have been and may have lost such items.

The Teknetics 9000 is an excellent coinshooting detector. To coin hunt, adjust the detector for normal outdoor use at the hunt site. Adjust the discrimination control to the trash rejection desired.

CAUTION: High discrimination settings will reject Nickels and Small gold rings and gold coins. However, with the 9000 LCD a very low discrimination setting can be used. When the discriminate audio tone signals a good target, the Target ID can be used to identify the target.

Once it has been determined the target is good, it's depth can be checked.

Carefully remove the target taking care not to damage the object. In lawn areas, caution should be exercised so as to not damage the grass or leave unsightly and dangerous holes.


Areas involved in past wars such as the civil war Indian campaigns etc. provide many articles from the past such as cannon balls, mini balls, shells, guns, medals, swords, uniform buttons, knives, etc. . . Other areas to locate articles of history would include old mining towns and areas occupied by early settlers. Since most any item may be of interest you might want to hunt these areas using the GB All metals Mode. The DISCRIMINATE MODE can be used if locating iron objects is not desired.


Searching washes and gullies or old tailings from mines has often revealed nuggets of gold. From time to time even very large nuggets weighing many ounces are reported being found with metal detectors.

To hunt for nuggets adjust the detector for operation in the GB All metals Mode and search known gold or silver bearing regions. The loop can be submerged underwater for searching shallow streams. The instrument case is not waterproof - protect it From water or rain.

NOTE: It is best not to use the GB DISC Mode when prospecting. Tiny gold nuggets are easily rejected when using discrimination. Also metal detectors will NOT detect flake or powder gold.


Beach combing is a lot like coinshooting except the digging is usually easier.

Wetted beach sand is usually so conductive that maintaining ground balance may be difficult. You may find that it is best to ground balance over dry sand (if mineralization is present) and then switch to GB DISC. for searching over wet salt sand.


Ring hunting can be more fun and productive than ever before but only after you've become familiar with your detector.

Although there are some exceptions most rings can be placed in four groups:

1. Thin Rings (Foil Reading) 2. Wedding Bands (Nickel Reading) 3. Class Rings (Screw Cap Reading) 4. Large Rings (Coin Reading)

Thin Rings: These rings are much Thinner than your regular wedding band. These types of rings are usually found al the upper part of the foil region. Most foil in an area may be reading from zero to 8 so you would set your discrimination control to just reject the highest foil reading and then dig all other foil readings. You may still find some foil but you'll also find those thin diamond rings that you and everybody else have been missing.

Wedding Band Rings: Most of these rings read out in the nickel area of the meter. So if you dig all the readings that you get in the nickel area of the meter you'll find lots of nickels and also those nice wedding bands. There are going to be some bad objects that read in the nickel area of the meter such as the tab- portion of the pull-tab. So if you re in an area that has lots of broken pull-labs you would have to dig some of the broken tabs to detect those wedding band rings and nickels. You could adjust the discriminate control to eliminate the broken tab and still detect the nickels. but you would loose some of those wedding band rings. Usually the small amount of broken labs you dig compared to the number of nickels and wedding bands makes it worthwhile to dig everything that reads out in the nickel area.

Class Rings & Wide Wedding Bands: Most of these rings read out in the pull lab and screw cap area of the meter. When you first start hunting in an area, dig everything until you get a good feeling of where the pull tab and, if there are many in the area, the screw caps are reading on the number scale. You may find that the pull labs in a particular area are reading 32 to 34 on the number scale Then you should dig any reading in the pull tab, screw cap area that may be unusual such as 36 or 38 on the scale.

Larger Rings: Some, the very large (wide) gold rings will read up in the areas of the coins such as penny quarter and halves it's important to realize that these rings may fall in the screw cap area of the meter just below the penny so don't assume the screw cap readings are actually screw caps until you've checked a few to see where they re reading on the scale.



The following precautions service tips will help ensure your detector's long life and performance.

Cleaning: The loop and rod are waterproof. They can be cleaned with fresh water and a mild non abrasive cleanser. The case can be wiped clean with a damp cloth. After cleaning, dry the instrument thoroughly. CAUTION: The detector case is not waterproof, and water if allowed to enter it will damage electronic components.

Weather Conditions: Your detector has been engineered with durability in mind. However, like any fine electronic equipment, your detector should be protected from excessively cold or hot weather. Freezing or excessive heat can damage the electronic components. The case is not waterproof, protect it from rain.

Additional Precautions: Avoid dropping your detector. Sharp blows to the loop should also be avoided.

Storage: Store the detector in a cool dry place not in a hot attic, etc...

The following service tips may help if trouble is encountered:

1. The detector will not operate (dead):

a) Check battery condition.

b) Check controls for intermittent operation.

c) Check the loop cable connection to case.

2. Erratic Operation:

a) Check battery condition.

b) Check to see that the loop cable is wrapped snugly around the rod and properly connected.

3. Oscillating or pulsing tone:

a) This effect can by caused by external electrical sources such as: power lines, television sets, CB radios, and for other nearby detectors.

4. The detector "drifts" or slowly changes in tone:

a) Sudden temperature changes can cause "drift" -- allow time to stabilize.

b) Apparent drift may be due to improper ground balancing, or use of the TR Disc. mode in mineralized areas.

c) component failure can cause rapid steady drift.

5. No sensitivity:

a) The GB Disc. & Target ID modes rely on motion to produce a sufficient signal for activating these circuits.

b) Mineralization can greatly reduce depth of the TR Disc. Mode.

c) Improper ground balancing.

d) Check battery condition.



In order to familiarize yourself with the operation of your detector and to be assured of all the modes of operation, the adjustment instructions may be carried out indoors if the following precautions are followed: Remove metal objects such as watches and rings and be sure that other large metal objects are at least several feet away so that there is no influences on the detector. Television, fluorescent lighting, microwave and other type of equipment of this nature can cause interference.



Operating Frequency: 6592 Hz Crystal Controlled

Audio Frequency: Variable

Weight: 4 lbs. 12 oz.

Optimum Temperature Range: 33°-100°F

Optimum Humidity Range: 0%-75%

Power Requirements: 9v & 12v DC (Nominal)

Batteries: 14 individual NiCad Cells

Battery Life Expectancy: 7 to 10 hrs. continuous use

Depth Capability: U.S. 25 Cent Piece @ 9" to 10"

Your actual depth may vary somewhat as a result of ground conditions, length of time the object has been buried, and your skill.

Loop Diameter: 71/4 inch.

Loop Weight: 8 3/4 oz.

Loop Type: Bi-planar Concentric

Integrated Circuits: 29 I.C.'s

Special Features: Audio Target Identification and Meter Readout of depth and probable target.

Modes of Operation: G.B. Disc., G.B., G.B. Max, T.R. Disc.

This webpage brought to you by White River Preparium


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