Serbian "Most Wanted"

[Vladimir]

CC coil 24sm diameter - 2.4/13.2mH 14v p-p on Tx 6.8khz : 1euro about 32sm in the air.

Hi
14V p-p voltage is too small for the detector.
The frequency should be 5.4-5.7kHz

[Pompey]

CC coil 24sm diameter - 2.4/13.2mH 14v p-p on Tx 6.8khz : 1euro about 32sm in the air.

[Ultimate_Haze]

Here are some air test videos:

http://www.youtube.com/watch?v=TKmpUzbNRms

and

http://www.youtube.com/watch?v=Xav7kPlQzYc

first one hand made DD27
second TS1000 coil

Ruler is 50cm long.

[WM6]

WM6,

In response to your test with a brick. Try this: place your target under a complete sidewalk or driveway made of bricks. You will see that most any coil can find the target. but.. NOT under a single brick. The reason being is that the DISC channel will see the signal from the brick go in the opposite polarity as the desired target and mask the target. With a complete sidewalk made of bricks, the signals rate of change (from bricks) is slow compared to the target and will not be masked.

In order for a detector to signal, BOTH channels must agree, at the SAME time. This will not be the case with a signal from a single brick and a target under the brick. Connect a dual trace scope to both channels of your detector and you will see this.

Another test to prove this point: Ground balance to a brick. Hold the coil still and place the brick on TOP of the coil. Then, move your target over the brick. Voila!

Did I understand your post correctly?

Don

Hi Don

I think you upgrade Orbits message in some way. Brick have to be out of clay (cause of Fe inside).

It is only about suitability DD and CC coil for SMW detector. Orbit argue, by test, only DD as adequate.

[lari]

[ATTACH][/ATTACH]

[ATTACH]11659[/ATTACH]

[lari]

[lari]

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[Quote = gurdal; 109640]5x5 aluminijski okvir u zrak će biti otkriti s udaljenosti od 1 metar.


diskriminacije i nije bio u mogućnosti testirati još, ali podzemne[/ Quote]

[Geo]

Google translation:

Hello everyone, do a simple test. Set up under a full brick thickness 6cm D18mm and before that you do set the detector to detects under a full brick (and potentiometers for GB and diskriminator set so as not to see the iron objects). You will see the following: almost any detector that has a DD coil penetrates a brick and see the coin, and all the detectors with a concentric or coplanar coil will noe se the same coin. To the explanation for the case which is our friend and tried cesar ML Souvereign so Souvereign was better than cesar. Connect the DD probe only described by ivconic and you will see, it's the right thing. Leave the blue max, etc. and other concentric probe away.

Hi.
The text by Orbit was for me, so i give a small answer.
I don't construct the coil descripted by Ivconic because i have not a similar Minelab coil and to compare ot with the Sovereign. Cesar is a 95% Fisher 1225. Small differences, except that try to give more Tx signal by the use of critical adjustments (potentiometer adjustment). Also the tune of coil make it more sensitive.
If it is so special, why Fisher is not????
Anyway, i like better my Sovereign

Regards

[dfbowers]

Brick test

WM6,

In response to your test with a brick. Try this: place your target under a complete sidewalk or driveway made of bricks. You will see that most any coil can find the target. but.. NOT under a single brick. The reason being is that the DISC channel will see the signal from the brick go in the opposite polarity as the desired target and mask the target. With a complete sidewalk made of bricks, the signals rate of change (from bricks) is slow compared to the target and will not be masked.

In order for a detector to signal, BOTH channels must agree, at the SAME time. This will not be the case with a signal from a single brick and a target under the brick. Connect a dual trace scope to both channels of your detector and you will see this.

Another test to prove this point: Ground balance to a brick. Hold the coil still and place the brick on TOP of the coil. Then, move your target over the brick. Voila!

Did I understand your post correctly?

Don

[gurdal]

Congratulation Gurdal. Very handy design. Are you doing some tests?

5x5 aluminum box in the air will be detected from a distance of 1 meter.


discrimination and was not able to test yet, but underground

[WM6]

Pozdrav svima napravite jedan jednostavan test . Postavite ispod jedne pune cigle debljine 6cm novcic 18mm a pre toga nastelujte detektor da ne svira na samu ciglu sa potenciometra za graund balans a diskriminator podesite tako da ne vidi gvozdene predmete . Videcete sledece skoro svaki detektor koji ima dd sondu probija ciglu i vidi taj novcic , a svi detektori koji imaju koncentricni ili koplanar sondu taj isti novcic nece videti e toje objasnjenje za to sto je nas prijatelj probao cesara i soveringena pa je soveringen bio bolji kod cesara stavite iskljucivo dd sondu koju je ivonik opisao i videcete da je to prava stvar i manite se blue maks itd mislim na koncentricne sonde . Molio bih prijatelje koji znaju engleski da ovo prevedu realno.

Google translation:

Hello everyone, do a simple test. Set up under a full brick thickness 6cm D18mm and before that you do set the detector to detects under a full brick (and potentiometers for GB and diskriminator set so as not to see the iron objects). You will see the following: almost any detector that has a DD coil penetrates a brick and see the coin, and all the detectors with a concentric or coplanar coil will noe se the same coin. To the explanation for the case which is our friend and tried cesar ML Souvereign so Souvereign was better than cesar. Connect the DD probe only described by ivconic and you will see, it's the right thing. Leave the blue max, etc. and other concentric probe away.

[WM6]

Congratulation Gurdal. Very handy design. Are you doing some tests?

[gurdal]

hi all

thank ivonic,Most Wanted

[matabele]

Bill of Materials

Can anyone post a BOM?

[WM6]

hello Srbija,

ja sam iz slovenije. Ivonic, da li si napravio dodatak za epe magnetometar , da bi mogao upotrebiti zvučnik za signalizaciju?

pozdrav
joze

Ivconic zaenkrat ne prihaja vec sem, dobis ga (tam je Stevan) na njegovem forumu:

http://hobidetektori.own0.com/forum.htm