TESORO GOLDEN SABRE

[Max]

Hi,
Max.
I mean 25cm diameter for former in D shape!Not O 25 cm!
I read somewhere that its no good to change form.Its better to use former with right shape and wind directly/like IVCONIC/.
And I found my mistake/its not my,but...../
I have mesured my old wire and WOW 0,32 without the varnish!!!
You have told me that even 0,30 is no good whats up for 0,32!!!!
But the truth is that the coil is good!!/good in air I am shore that in soil will have bad performance as you say!/
Why it perform well?
But now I have 0,25 and will wind your 22cmDD coil.Because I am not shore how much turns for this NEW coil?
I remember your advice but ..... still dont have good multimeter to chech frequency and inductance!
For your 22DD and Ivconics 28DD I think will be more easy because I now how much turns.So thats why I ask you so many times.

If I can help for housing or something else just tell me
Thanks

Hi,
" mean 25cm diameter for former in D shape!Not O 25 cm!
I read somewhere that its no good to change form.Its better to use former with right shape and wind directly/like IVCONIC/."

You can do that way... using directly a D shaped former, or nails etc with right dimensions... or a round former or anything else.

What's important is that you have at the end the shape required... and a tight wound.

Performances are not influenced by upon which you wound them... but by how they are at the end.

Best regards,
Max

[tiktak]

Hi,

I just start making Tx
former size 19cm
Tx=141
Rx=150
And wire is 0,25 without varnish.
Will see
What you thing on my previous coil with 0,32/ without varnis/ why its working without cap modfication?

[Max]

I just start making Tx
former size 19cm
Tx=141
Rx=150
And wire is 0,25 without varnish.
Will see
What you thing on my previous coil with 0,32/ without varnis/ why its working without cap modfication?

Hi,
try first that...
but I suggest TX=120turns RX=135turns gauge=0.25mm without varnish

Maybe you matched inductance required using more turns... that could explain also that you got right resistances.

I said before that wire gauge is not so important if you know what are you doing... (or are lucky).

Best regards,
Max

[tiktak]

Hi,
try first that...
but I suggest TX=120turns RX=135turns gauge=0.25mm without varnish

Maybe you matched inductance required using more turns... that could explain also that you got right resistances.

I said before that wire gauge is not so important if you know what are you doing... (or are lucky).

Best regards,
Max

Hi,
Max.
You advice me to try TX=120turns RX=135turns gauge=0.25mm without varnish for 22DD coil?Or for 25DD coil that I ask.
Because its odd!Ivconic use TX=120turns RX=125turns gauge=0.25mm without varnish for his DD28!So its strange same turns different D why?
Thanks

[tiktak]

Hi

Lucy I can say.

[tiktak]

Hi,

Hi,
Max.
I wind 141 turns and resistance is 27,7!!!!
This is too high?
Shell I wind back to 120 or leave like this and thry?

[nelson]

Nulling was set at 0.01 mV.
May be my multimeter frequency counter is out of range, cauce is very strange that the coil that is measuring 19.2 Khz, have a good performance and the one that is showing 13.8 Khz is working bad.
For my doubs i ll try another frequency counter to see if the frequency is ok.

Thanks Max.

Regards

Nelson

Hi,
I think that if you get 13.8KHz your multimeter maybe measure inductance better than the professional inductance meter.

TX 5.9 mH

Is what I expect for frequency of 13.8KHz in Gsabre oscillator.

I think that your problem with this coil is not in inductance that seems about the same of chart and the same I have... but in the nulling.

I think your second coil isn't nulled well as first one... or that you have reversed leads respect to the right way.

Check the null... then test, swap rx leads, and test again.

Best regards,
Max

[tiktak]

HI,

Hi,
Max.
The resistance with 141 and 150 is too high but the sound now is louder than the readings from my previous!
So I will try as you say 120 and 135 and will fix this two new coils in housings and will be gone for some time to make real field tests.
The surfice is covered with rocks and cant keep coil close to ground on MY HUNTING AREAS!!!
But anyway no stupid questions for some time..........

So wish me luck!I am shore that TGS will performe MUCH better then the chinees toy that I have.But I wanned to make IVCONICS 28DD too.......
See you when I return.
Be well!

[tiktak]

Hi,

Nelson,
Its look like every TGS have its own aditut,no metter that we use the same parts,so keep on.You have very good results!

[Max]

Hi,
Max.
The resistance with 141 and 150 is too high but the sound now is louder than the readings from my previous!
So I will try as you say 120 and 135 and will fix this two new coils in housings and will be gone for some time to make real field tests.
The surfice is covered with rocks and cant keep coil close to ground on MY HUNTING AREAS!!!
But anyway no stupid questions for some time..........

So wish me luck!I am shore that TGS will performe MUCH better then the chinees toy that I have.But I wanned to make IVCONICS 28DD too.......
See you when I return.
Be well!

Have a good trip ! I wish you'll be lucky with your TGS.

[nelson]

Ok TikTak, have a good trip and post your results when you get back.

Regards

Nelson

Hi,
Max.
The resistance with 141 and 150 is too high but the sound now is louder than the readings from my previous!
So I will try as you say 120 and 135 and will fix this two new coils in housings and will be gone for some time to make real field tests.
The surfice is covered with rocks and cant keep coil close to ground on MY HUNTING AREAS!!!
But anyway no stupid questions for some time..........

So wish me luck!I am shore that TGS will performe MUCH better then the chinees toy that I have.But I wanned to make IVCONICS 28DD too.......
See you when I return.
Be well!

[Qiaozhi]

Question for Max:

The Tesoro concentric coils have a direct connection between one wire of the RX coil and the screen. The screen is also used as one of the wires for the TX coil, and is connected to 0V on the PCB.
When you made your DD coils, what scheme did you use with regard to this screen connection in the search head. In other words, did you connect one side of the RX coil to the screen, as in the Tesoro concentric coils.

If anyone else has made their own DD or OO coils for a Tesoro detector (clone or original) I would be interested in your experience in this area.

Thanks.

[Unregistered]

Tesoro uses a diff. ampl. The ground for the RX is made in the coil.
This way the twisted pair eff. from the cable is used to cancel out ext. noise.
For opencentere ore DD ore OO coils this is al the same.... I think...

Good luck

[Max]

Question for Max:

The Tesoro concentric coils have a direct connection between one wire of the RX coil and the screen. The screen is also used as one of the wires for the TX coil, and is connected to 0V on the PCB.
When you made your DD coils, what scheme did you use with regard to this screen connection in the search head. In other words, did you connect one side of the RX coil to the screen, as in the Tesoro concentric coils.

If anyone else has made their own DD or OO coils for a Tesoro detector (clone or original) I would be interested in your experience in this area.

Thanks.

Hi,
already explained by unregistered.

The connection I have is inside the coil. There the two shields wires leads are connected with an RX coil lead to provide a common gnd point there then that joint is connected to the gnd wire coming from the TX pads.

Right schematic is like in BandidoII that shows just RX coil without gnd connection at schematic. But connection exist in original coil made inside the coil itself, so one of RX wires coming from the search coil is actually connected to GND.

Think that as explained all this is to avoid twisted pair effects, having the common gnd connection just at the coils level.

I use that wiring in all my coils.

Kind regards,
Max

[Qiaozhi]

Tesoro uses a diff. ampl. The ground for the RX is made in the coil.
This way the twisted pair eff. from the cable is used to cancel out ext. noise.
For opencentere ore DD ore OO coils this is al the same.... I think...

Good luck

Yes - I know all this.
What I'm asking about is what configuration has anyone used for either a DD or OO configuration with the Tesoro circuits. i.e. Did you connect one side of the RX coil to the screen within the search head, or perhaps used a centre-tapped RX coil, etc. ??
Also, did anyone notice any difference in operation if the RX coil is not connected to the screen within the search head?