TESORO GOLDEN SABRE

[Max]

Hi Max

For bz1 what i need? a simple piezo or one with oscillator inside?
Diode are 1n4148?

Thanks in advant.

Bye Maxbiri

Hi,
I've used shottky diodes... cause have handy... but any small signal silicon diode will be fine, so 1N4148 will work just cool there.

I don't know what's original BZ1 thing... but guess was selfoscillating buzzer.

As BZ1 you can use a selfoscillating buzzer thing...like murata ones: I did that way and works about good, sharp tone when near the object and get full detection... cracked sound when is detected at more far distance... I like it.

I tested also common small 8ohm speaker: it works too with a VCO like effect I don't like much... so used the murata instead.

I think no simple piezo buzzer is right there... but you can try, I didn't.

Kind regards,
Max

[maxbiri]

Thanks Max

I will test this simple circuit, i have cz6a with 10" coil and sametime i need a small pointer.

Bye Maxbiri

[tiktak]

Hi

Hi,
Ivica.
Exelent work as aweys!
Now its almost complete and Hell of machine!
Can you please upload PCB view of last schematic and sp.layout files Please?
How you make centre taped DD coil?What is diferance in wiring?
Thanks

[ivconic]

PCB not ready yet. When ready i will post it for sure.
Center tapped coil means only TX with center tap. For example i used 0.25mm wire and 54+54 windings on already explained coil form/holder.
Wiring differs a bit. TX ends are connected with separate coated wires through cable. Center tap is connected to gnd at pcb. TX ends are connected at proper spots at pcb. Both faraday cages are also connected at gnd on cable (shield) and on pcb gnd.
Cheers!

[tiktak]

Hi

Hi,
Ivica.
Ok.Now its clear.I will try it ASAP.
From what I can understand this is nexus idea!So the bad signals are pumped out and this results in less noise and from this we achive more depth and how diferent coil and performance.Right?
When the coil is ready some caps should be matched!Right?
Tks

[karlos x]

Hi Ivconic !
Good job.......Let her be forcing with yorself !

[ivconic]

???

[Friday]

Hi...
I want to TGSL 1265 so I've a problem.
What is the TGSL 1265 coil's measurements?
Regards.....

[amtech2005]

Hi...
I want to TGSL 1265 so I've a problem.
What is the TGSL 1265 coil's measurements?
Regards.....

Hello Friday , You need to go back and start on at least "page 94" of this thread "Tesoro Golden Sabre" . See Post#2398 from member Dirceu . See thread #2359 Dirceu again . #2413 member Eclipse . #2414 MAX , also see all of Ivconics posts , and other members posts and Also page 98 is a bunch of stuff on coils. This tesoro Golden sabre thread is probably the biggest "knowledge base" on tesoro Golden sabre or "closely related" , On this planet !!!
So it depends on the what size and type of search coil you want to use. Ivconic has now discovered when you center tap the TX portion of the coil it greatly improoves performance . So the Tesoro search-coil building is not really Final Yet !!!! But very Close . Re-check the last 10-15 pages on this thread , you are Guaranteed enough information to make a very good Search-coil for the Tesoro Golden Sabre light-1265 !!!!!!!! Anyone else is welcome to comment here also , or even post their final coil data if they have it. But what is best , is to read everything , becauase it is very educational , and here on Geotech Forum it is the "Best Classroom" of any Metal detecting and or Electronic Forum in the world !!!!!!!!!!......AND YES , IVCONICS HOBI-DETEKTOR SITE IS 2nd Best in the World and CATCHING UP !!!!!!.................Eugene

[Max]

Hi...
I want to TGSL 1265 so I've a problem.
What is the TGSL 1265 coil's measurements?
Regards.....

Hi,
I will not repeat that numbers again in the future... cause we already made several times... now cause the thread is so long and a correct search is about time wasting I do for you, once again.

You need 100 turns for TX, 105 for RX, wire 30AWG, you have to make DD coil about 11'' diameter... forget about inductance and resistance values: just try to match 14.6Khz at tx oscillator using 100turns (you could also try adding or removing few turns... but I tell you that 100turns is the right number if the wire is right and former too).
On RX you have to null for minimal residual voltage.

And you'll have a working coil. Could tweak reading all that posts, find it.

To have an idea of former and dimensions look at page 39, for signals look at page 57.

Kind regards,
Max

[wild_desert]

Hi Max
Do you have Block diagram of TGSL?
I want to make it with only one demodulator that phase angle of square wave signal changes by a micro(phase scanner).
in my initial tests i saw some metals change only phase angel and others change amplitude!
i was confused. i'm searching what? phase shift or amplitude change?
why the resonat frequency of TX and RX must be different?
if i have Block Diagram, i can find answers.

[Max]

Hi Max
Do you have Block diagram of TGSL?
I want to make it with only one demodulator that phase angle of square wave signal changes by a micro(phase scanner).
in my initial tests i saw some metals change only phase angel and others change amplitude!
i was confused. i'm searching what? phase shift or amplitude change?
why the resonat frequency of TX and RX must be different?
if i have Block Diagram, i can find answers.

Hi,
no... I haven't, sorry. But it's quite easy identify various parts... you have op amps used as phase shifters that control the gate of fets... fets are the sampling devices in TGS. That's about same stuff for disc and gnd parts... you have 2 phase shifter networks and 2 fets for that (TGSL).

After the fets there are the low pass filters... so are other blocks.

All tesoro coils for uMax shift to the left (I saw that on 9x8 and 8 round but think they are all the same about this) when a metal is near, no matter of kind of metal, are eddy currents that make it happens. The non-ferrous give rise in amplitude... and iron gives a fall in amplitude at rx, this is related to flux lines behaviour.

It's a bit complex issue: on geb channel you get amplitude variations that are driven actually by phase shift introduced by targets.
In the disc channel you get, instead, amplitude variations related to amplitude variations at rx coil.

It's so cause geb channel don't care about target composition but only that mineral response need to be ignored.

But you'll better ask Qiaozhi about subtle details, he knows about these designs strategies very, very good.

Kind regards,
Max

[Noemio]

Question for IVCONIC

Hi Ivica,

Just a little question: is this the kind of coin you use to compare your MD’s performances?

Thank you

[ivconic]

No,
as i stated many times - 1e coin!

[Qiaozhi]

I want to make it with only one demodulator that phase angle of square wave signal changes by a micro(phase scanner).
in my initial tests i saw some metals change only phase angel and others change amplitude!
i was confused. i'm searching what? phase shift or amplitude change?
why the resonat frequency of TX and RX must be different?
if i have Block Diagram, i can find answers.

Can you explain in more detail what you are trying to achieve here?
Why do you only want to use one demodulator?

Hi,
no... I haven't, sorry. But it's quite easy identify various parts... you have op amps used as phase shifters that control the gate of fets... fets are the sampling devices in TGS. That's about same stuff for disc and gnd parts... you have 2 phase shifter networks and 2 fets for that (TGSL).

After the fets there are the low pass filters... so are other blocks.

All tesoro coils for uMax shift to the left (I saw that on 9x8 and 8 round but think they are all the same about this) when a metal is near, no matter of kind of metal, are eddy currents that make it happens. The non-ferrous give rise in amplitude... and iron gives a fall in amplitude at rx, this is related to flux lines behaviour.

It's a bit complex issue: on geb channel you get amplitude variations that are driven actually by phase shift introduced by targets.
In the disc channel you get, instead, amplitude variations related to amplitude variations at rx coil.

It's so cause geb channel don't care about target composition but only that mineral response need to be ignored.

But you'll better ask Qiaozhi about subtle details, he knows about these designs strategies very, very good.

Kind regards,
Max

Your description is basically correct, but I'm not sure what wild_desert is trying to do. It doesn't make any sense at the moment. We need to wait for an answer.