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Teknetics Mark 1 Operating Manual

Offsite link: Lost Treasure 1985 Mark 1 Field Test

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.

Teknetics Mark I Owner's Manual

QUlCK SET OPERATION The following simplified instructions will allow you to immediately begin using your new detector. However--to get the best performance from your detector, and for more detailed information -- PLEASE READ ALL MATERIAL CONTAINED IN THIS MANUAL.

1. Detector must be assembled & batteries fully charged.

2. Set all controls to their BLUE colored areas this will turn the detector "ON" and place all controls al nor mal settings for average search conditions in the GB DISC Mode.

3. With a slow sweeping motion, pass the search loop back and forth over the ground until a good target is located.

4. To pinpoint a good target--tap the toggle switch to the left once lo activate The GB All Metals mode. Coin depth will be indicated on the meter and the target will be directly below loop center at the point of loudest response.

5. To regain The GB DISCRIMINATE Mode-tap the toggle switch to the right one time and begin sweeping motion.

6. Check local laws and ask permission to hunt. Always fill all holes and avoid damage to lawns.


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 technotogy 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 large response.

GOOD Tuning


Carefully unpack your detector and check to see that you have all the parts shown on the following page. Assemble the detector by placing the isolator into the lower rod and then the lower rod and loop into the upper rod Wrap the cable around the rod and connect lo the loop plug on the case as shown.

Note: At this time you may need lo charge the batteries if your detector is equipped with a rechargeable NiCad system. The charger jack is located al the rear of the in instrument case.

Refer to Section on Batteries.


Your new detector is equipped) with factory installed rechargeable Nickel Cadmium batteries which will save many hundreds of dollars in ~a~--- purchases as they may be recharged as many as a Thousand times or more. the batteries will require charging for a period of 14 lo 15 hours to bring them to full capacity as they are shipped in the until only partially charged. 11 is not necessary lo remove the batteries to recharge them. Simply plug the charger into the charger so~--- on rear of detector and connect lo an electrical outlet Nickel Cadmium batteries can develop a memory pat tern timing Their available capacity 11 they are used in the instrument. for example. for Two hours each 1 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 .


Fourteen 14) 1 1/2 volt AA Penlight Alkaline batteries may be used instead of the Ni-Cads 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 NI-CADS. There is danger of explosion which may result in not only damage to the instrument but also personal injury.

Checking BAT Battery CONDITION

To check the condition of the batteries installed in the detector turn the POWER- Switch to Batt. Fully charged batteries will read about full scale on the meter. After the first 30 minutes of operation Ni-Cads will drop to approximately 60 on the meter scale and remain be between 20 & 60 for the duration of the charge. 1.5 Volt Penlight Batteries (Alkalines) will show a gradual decline in voltage during their operating life. This detector also gives an audible indication of battery condition. As batteries weaken, the audio will increase in the BATT. position of the POWER switch. When the batteries are too weak to power the detector properly the audio will come on loud and will not be adjustable. Recharge your Ni-Cads or replace your 11/2 volt cells when the batteries read in the BAD zones.


1. Threshold one · Barely audible tone set by the TUNER control. Note: The TUNER can be set for --- GB Disc. operation with no loss of sensitivity.

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. Target ID · Target Identification used only in GB/D Mode to identify detected metal objects.

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

10. CW · Clockwise (Increase)

11. CCW · Counterclockwise (Decrease)

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

13. 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

14. A.T.I. · Abbreviated term for Audio Target Identification. A certain audio pitch identifies the type of metal object located.

15. TGT. SEL. · TARGET SELECT a mode of operation that allows certain metals to be selectively accepted or rejected.



1. Tuner Adjusts Threshold setting

2. Tone Adjusts audio Ire~frequency

3. GND Sens. Selects degree of sensitivity for GB DISC.

4. GND Balance Adjusts the detector to balance out or neutralize ground mineralization.

5. GB Disc. Selects the level of discrimination desired by the operator.

6. TARGET SEL. Selects specific target lo be accepted or rejected.

7. Power Turns the detector on and off and selects battery check or target sel. mode.

8. Volume Adjusts loudness of Speaker or Headphone sound.

9. Toggle (not shown)- Used for retuning and mode selection.


TOP BAND: Coins & Trash

2nd BAND: 010 Scale

3rd BAND: Depth scale

4th BAND: Battery Check

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.


The toggle switch performs several functions thus aiding in true "one-hand" operation of this detector The following is a list of the different toggle switch functions:

1) Each time the toggle switch is momentarily pressed or RIGHT - The detector is retuned to its threshold audio as set with the TUNER control .

2) Momentarily pressing the toggle switch one time to the LEFT activates the GB (All Metals) MODE. In this mode all metals ferrous and nonferrous can be located. When operating in this mode the meter will indicate the depth of coin sized objects. This mode is also used for pinpointing targets.

3) Holding the toggle lo the LEFT "Holds" the depth reading To do this the loop must first be centered over the target in the GB (All METALS) Mode.

4) Momentarily pressing the toggle one time to the RIGHT activates the GB DISCRIMINATE Mode. This is a very slow motion VLF DlSCRlMlNATE Mode When operating in the TARGET Identification mode both visual (Meter) and AUDIO (ATI) is activated.

5) Holding the toggle switch to the RIGHT displays (on the meter's coin scale) The GT.SEL or GB DISC control setting depending on the POWER switch position. With the POWER set to ON the GB DISC setting is displayed as the toggle is held lo the RIGHT. In the TARGET SELECT position of the power switch the TGT. SEL. setting will be displayed.

6) The toggle switch can also be used to aid the pinpointing of targets. With the detector in its All METALS MODE, you will find that as the loop nears the target the sound will increase Momentarily pressing the toggle to the LEFT and releasing it (as the loop nears the target) detunes the target signal (lessens the sound) thus making it easier to pinpoint. NOTE: The depth reading will not be correct after detuning to pinpoint.


Proper tuning and ground balancing is essential in order to achieve optimum performance from your metal detector,

This is done by first adjusting your detector to its Threshold-- and second. adjusting or balancing out the ground mineralization al the site to be searched.

Start with all controls set to the Blue colored areas. This will turn the detector ON and all controls will be near their normal operating positions

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

Adjust the TUNER for a slight threshold tone. Once set should the threshold change for any reason other than actually changing the TUNER control it can be reset by momentarily pressing the Toggle Switch to the LEFT or RIGHT. Press LEFT lo retune in the All Metals mode or RIGHT to retune in the GB Disc. Motion mode.

With the detector now tuned to its Threshold you are ready to Ground Balance it to the soil being searched. 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 (see illustration on following page.). 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 detector must be set to the GB All METALS Mode for ground balancing. To do this momentarily press the toggle switch to the LEFT. This will activate the All METALS Mode. Now 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.

It the volume decreases. raise the loop back up and in crease the GND Balance Control (clockwise) 11 the volume increases. decrease the GND balance Control (counterclockwise).

Press and release the toggle switch to the LEFT to retune after changing the GND Balance Control Lower the loop back lo 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 tone 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.

Once sel. Readjustment of the GROUND BALANCE CON TROL is necessary only when soil mineralization changes a great deal. In many areas of the country simply setting the GROUND BALANCE CONTROL to its blue colored area is OK if a precise setting is not desired.

The detector- is now ready to operate in the All METALS Mode. In this mode any metal (ferrous or nonferrous) will be detect~ed.


The G.B. Disc. Mode is a ground balanced discriminate mode. This mode relies on a slow movement of the loop over a 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 momentarily press the toggle switch once to the RIGHT -This activates the G.B. DISCRIMINATE Mode. Set the GB Disc. control to the desired level of trash rejection.

NOTE The G B Disc setting can be observed on the meter by holding the toggle switch to the RIGHT Release the toggle when checking for correct target response. Once the G B Disc is set s~weep the loop over the search area as shown Good objects will respond with various positive signal tones- Bad objects will cause a negative (quiet) or broken tone

NOTE: This detector- uses ATI (Audio Target Identification ) as an aid in determining Good targets from Bad targets Non-Ferrous metal objects will cause the detector to respond with a certain audio pitch (frequency) that will almost always be the same for a particular target. For example foil causes an audio response of about 350Hz and a Dollar is about 1 10011z.

NOTE: This detector relies on motion to activate the GB Disc. Mode.


To pinpoint a good object - flip the toggle switch to the left. Slowly X the target.


Until now ALL metal detectors using discrimination had two common drawbacks First: when set to reject pull tabs--Nickels were also rejected. Second: when set to reject screw caps--not only were nickels and many small gold rings rejected but also a great deal of detection depth was lost.

The Target Select feature allows you to set the detectors discrimination to reject pull tabs (even Screw Caps) and not reject nickels or small gold rings that read as nickels. Also there is no loss of detection depth.

To use Target Select. start with the detector tuned and ground balanced as previously described with the POWER switch at the ON position. HOLD the toggle switch to the RIGHT. Observe the meter and adjust the GB DISC. for the desired level of discrimination. For example: S. Caps at about 62 on the scale release the toggle Next set the POWER switch to Target Select . Again HOLD the toggle switch to the RIGHT observe the meter and adjust the ~G~ SEL Control for a nickel about 28 on the scale. Then release the toggle. To check the settings, sweep the loop over a screw cap. The audio should go quiet. Now try a nickel. The detector should signal the presence of the nickel. 11 not. minor adjustment of the TGT.SEL. and GB DISC may be needed. The procedure just explained can be applied to reject or accept almost any target.

To illustrate this point simply turn the DISC. control fully CCW (least discrimination) Leave all other controls unchanged from previous settings. Now all targets from foil to coins will respond--except the Nickel which will now be rejected. The other extreme of this is demonstrated by turning the GB DISC. Fully clockwise (Maximum discrimination). The Nickel is now the only item that will cause a good response.

Don't be afraid lo experiment with different settings of the TGT.SEL. and GB DISC controls. Once mastered the TARGET SELECT feature can be a valuable aid to locating coins and rings in areas heavy with trash.

Note: When holding the toggle switch to the RIGHT (Meter displays the TGT SEL. or GB DISC. setting) the detector will not respond to targets until the toggle is released.

Note: The disc. Level must be set higher than the nickel to accept the nickel.


This detector incorporates a unique method of identify ing buried metal objects such as pull labs and coins. These objects can be identified by means of a meter reading and by a certain audio pitch corresponding to the particular item located. Targets can be identified only when the detector is operating in its G B Disc. Mode To identify a target make a single. short. Level pass of the search loop directly over the target in question.

NOTE: Avoid sweeping over any nearby targets as they may affect the reading Also metal objects closer than one ~1 ) inch to the bottom of the loop may cause multi ple responses

For example if the buried target happened to be a quarter - then as the search loop passed over it the audio pitch and volume would momentarily increase. The meter would read a quarter.--

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 ac curate 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 metals 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 control labeled GND SENS (Ground Sensitivity) can play an important role in the performance of your detector. If sel too high in an area of heavy mineralization or electronic interference the detectors response may be erratic and unreliable Should this happen simply reduce the GND SENS Control setting until the operation becomes stable and readings are reliable. Even al the lowest GND SENS selling this de~ector has better depth penetration than many detectors have al maximum


The depth scale of the meter indicates the depth of a single coin to over 10 inches deep. Once a good target has been located. momentarily press the toggle switch lo the LEFT. This activates the G.B All METALS Mode. Place the search loop on the ground directly over the target. You will be centered over the target when the meter shows the closest distance to the object.


1. This detector relies on motion to activate both GB Disc. mode and the Target ID circuitry. The following is an example of how this works:





2. Interpreting different types of responses: With A.T.I. you can tell many Things about a target just by the sound response of the detector~or As an example if you are using the detector in the GB Disc Mode with the Disc. adjust sel lo reject foil you can expect the following results:

3. Sometimes targets close together will cause a confusing signal - Try sweeping from different~ angles to help isolate targets:



4. Pinpointing the target: Pinpointing is important it helps to avoid damage to the object~ and ground. X ing as shown helps lo pinpoint the target:


5. Your detector can tell you many Things about a particular target that can be helpful in determining whether or not lo dig Make use of all the information available as an example:

Depth reading can be an indicator of coin a~older coins are usually deeper. The sound response can tell a lot - a coin usually gives a good solid sound regardless of sweep direction. When checking a target listen to the Size of the sound in the GB mode - a large target produces sound over a greater area than does a single coin. CAUTION: Because ring styles vary a great deal. rings may read anywhere on the Target l.D. scale Our findings to date indicate that many ladies gold rings will read almost the same as a nickel.

6. Accuracy: Although you- detector~ is very accurate on reading coins it is not ~---~ and certain~ items that read good on other detectors will also read good on ours An example of this would be a watch that read out like a 50-cent piece or a large gold ring that reads out like a screw cap or a Penny.

7. Halo Effect: Gold and silver coins don't oxidize much so they have very little Halo Effect. However, nickels and pennies do oxidize quite a bit and this oxidation surrounds the coin and not only make the coin appear larger to the detector but also makes the coin appear more conductive than normal This extra conductivity causes the coin to read higher than normal on the meter. Thus you may find some old pennies and nickels that read as high as a quarter or half.

Some nails --- and bolts and other iron objects such as old bottle caps oxidize very much and the halo effect around these iron objects make them hard to reject. Try sweeping the loop al different directions over the target. A good target will have a lairly stable reading whereas a bad target will usually not Freshly buried coins may not read out on the meler exactly the same as coins buried for a long time.

8. Hot Rocks: On all motion type detectors you will tind some largets thal read good in the motion discriminalion-- mode bul when you switch to the All metal- or Ground Balance- mode to pinpoint you find Ihal the largel had nulled oul or caused the All Metal Mode to go quiet when directly over this larget. This is because you have located what people call Hot Rocks . These hot rocks are objects that are less conductive than the ground you are hunting.

9. Suggested Hunting Tip- sel the GB DISC control at minimum (1) and --- everylhing that doesn't read Foil - or where Pull Tabs- are reading.

10. If background noise such as traffic is a problem, the threshold tone can be increased. Maximum sensitivity is maintained even at the higher threshold setting.

11. Respect the righls and property of others. Check local laws and ask permission to hunt. Always fill all holes and avoid damage to lawns.


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

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


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

Some specialize in only digging on weak signals increasing the likelihood of finding older more valuable coins that are usually silver.

To coin hunt adjust the detector for normal outdoor use at the hunt site. Reler to tuning and ground balancing section of this manual.

Select the GB DISC. Mode and sweep the loop over the search area as shown. Good objects will respond with various posilive signal tones-. Bad objects will cause a negative (quiet) or broken tone.

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, its 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.

NOTE: Freshly buried coins may not readout on the meter exaclly the same as coins buried for a long time.


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 nuggels weighing many ounces are reported being found with metal detectors.

To hunl for nuggels adjusl the delector for operalion in the GB All metals Mode and search known gold or silver bearing regions. The k~op can be submerged underwaler for searching shallow slreams. The inslrument case is not walerproof - prolecl il Irom waler 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.


Beachcombing is a lot like coinshooling except the digging is usually easier.

Wetted beach sand is usually so conductive that maintaining ground balance may be difficult. You may find that il is best to ground balance over dry sand (if minieralization 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 delector.

Although there are some exceplions 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 slill 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 objecls that read in the nickel area of the meler 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 discriminale conlrol to eliminate the broken tab and still detect the nickels. but you wou1d 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 everylhing 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 meler just below the penny so don't assume the screw cap readings are actually screw caps unlil you've checked a few to see where they re reading on the scale.

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