Tarsos detector vlf turkey

[Anwar2]

Ithink the discrimination depend on the frquincey of LC because every metal has reflex some value of frquencey the gold reflex 59kHz when we send this frquency some of this return back maybe but Im not sure But there is a list of all materials reflex some defrent frquency maybe the tarsos works well but depend on the count or value of coil and capasetor
allah knows beter

[scs]

Unfortunately, only with one channel is not possible to achieve simultaneous operation of Geb and Discr.Regards to the Tarsos designer .

[Anwar2]

thank u ledoc
same project Im using Ithink yes the problem is with the coil Iwill try my best
to correct this problem

and about wrap the coil my self Iwould rty to get the faberglass material but couldnt get Im 3D designer
one Ihave seen some where in the net some type of paste to make with it D3 models but cant remember the site
thanks my friend

[ledoc]

hi, thank you for your vows!

I did exactly what I found in this file

http://hotfile.com/dl/111507797/5dff37d/Tarsus.rar.html

without any modification or upgrade. I tried the autotune mod but I quickly take off because It was worse.

I read lot of things about coils, and now I m sure the most important part is the antenna!
To do mine I used the template furnished in the .rar file. But when I finished I realized that the radius of my coils is 5mm larger I think that why the inductance is not correct for the capacitance I put. I orded an RLC multimeter to check it.

But I have a question is it possible to use a coplanar coils for tarsos detector? did someone do it?

I plan to create a 3d model of a guide to wrap the coil. and to print it in 3d here:

http://www.shapeways.com/

to be allowed to do like a professional like here:
http://www.youtube.com/watch?v=uw2m7UfyvSM (it about 0:20s)

I ll give news about that.

Anwar2, your metal detector has a very low sensitivity but the discrimination does it work? If yes i m almost sure that come from the antenna!
I ll continue my investigation ;-)

[Anwar2]

Hi ledoc Eid Mubarak Happy new year
to day we are in Eids day Happy for all Muslem and NunMuslem Eids days
can I ask u some thing which version of diagram u built
happy new year

[Anwar2]

now can u tell me whats problem with my one

regard my friend

Anwar

[Anwar2]

Hi ledoc

see my one very bad detect see :http://www.youtube.com/watch?v=qOBCN...ature=youtu.be

[Anwar2]

http://youtu.be/wdFBEwShyBE

Did I do a mistake when I did the coils? What can be the explication of this phenomena?

well u have done good job man beter than my one ur one more sencetive

ithink im still begner ur my bos well done ledoc

my one can detect only big coc cans

[ledoc]

ok I ll use it like that. he s more sensitive than the hammerhead I made.

For the next detector I ll build I hesitate between TGSL and Volktrurm SM+geb

which are the good and bad points for each?

[ledoc]

http://youtu.be/wdFBEwShyBE

Did I do a mistake when I did the coils? What can be the explication of this phenomena?

[ledoc]

I used a multimeter ( mV DC ) with a diode like in the picture.
I putted 22kohms pot at 3 oclock , DISC and GEB pot s at the middle.
I searched the null position of my coils (lowest voltage possible) after I adjusted 22k pot to have the highest voltage on my multimeter. I did that 2 or 3 times to have the best result. It this level I have 90mV on the multimeter and 22k pot almost at 3 oclock

So now when I play with DISC I have clearly all metal and discrimation detection! super!
Not completly because the detection works perfect when I consider the middle of the coil (inside the DD area). With the discrimation the metal are detected not in the middle but by the coils themselves!, that mean when I spend over a nail (for example) I have 2 beeps!
I hope my description is clear. I ll prepare a video to show you the sensibility I can have and how it works with the discrimation.

[Anwar2]

At the beginning what is the position of the pot 100k (DISC)?
for example:
1) If I start completely at the left (counterclockwise) : the detector works with all metal with bad sensitivity and I can set the discrimination when I turn a little bit the DISC pot on the right. (detection: 1 euro at 11cm)
2) DISC in the middle position: discrimation doesn t works but I have the maximum of the sensitivity (1 euro at 30cm!) . Although I ve the impression that the ferrous metal are less detected than others.
3) DISC completely at the right (clockwise) : low sensitivity again

ledo set one of the small tuner Pot 22k put it on 3 oclock from this point u can set other pot 1k and 100 k put 1k and 100k on midd then move the 22k slowly its easy to set dont forget to move slowly the coils as
but normaly dose ur MD working I mean is it geting soud or not? when u move one of this resistans
regards
Anwar2

[Davor]

Try with aluminum foil - it should be somewhere in a middle between copper and iron.

[ledoc]

At the beginning what is the position of the pot 100k (DISC)?
for example:
1) If I start completely at the left (counterclockwise) : the detector works with all metal with bad sensitivity and I can set the discrimination when I turn a little bit the DISC pot on the right. (detection: 1 euro at 11cm)
2) DISC in the middle position: discrimation doesn t works but I have the maximum of the sensitivity (1 euro at 30cm!) . Although I ve the impression that the ferrous metal are less detected than others.
3) DISC completely at the right (clockwise) : low sensitivity again

[Anwar2]

The best performance I could have is one euro coin at 25cm.


If someone can explain me how to set the coils and all the pot s it will be very nice.

Anwar2, if everything works correctly perhaps that s come from of the coils. Did you put shields on both coils? because I ve already seen that and in reality it s a bad idea.

Can you say me, what s happened when you use the pot of the right (discrimination). and how you set the 22kohm pot?

The performance with discrimination is normally less than with all metal mode.

Hi ledo
No I coverd only one coil withr folew alumenum paper only RX coil

do u know how to set ur coil and pot first power on and move the both coils to make union and u will be heard sound then set pot22 k until sound stop then set withe pot 1k (GEEB) util the sound stop exactly this is the point to set then move some metal approch to the coil u will heard sond