TESORO GOLDEN SABRE

[Darko]

Hi Simon. Thank you very much for you interesting about my problem with TGSL. I hope, some of Guru’s today, here, will ready to help. I tried already different coils, shielding, cables and check ground connection from PCB to detector enclosure and always same thing - when I touch coil enclosure or shaft with finger, sensitivity of TGSL fall drastically! There is something wrong with GB section? I seen GB trimmer affect this? When GB under 50% all working normal but when set to reject ferrite (little up from 50%) machine loose sensitivity when touch coil enclosure or shaft with finger. How it should be work? I still don’t know how to null coil or there is problem with my TGSL? How adjusting of GB trimmer perform on TGSL? I wasn’t trying outdoor because coil wasn’t sealed with epoxy yet. I need to be 100% sure that all is right before seal coil with epoxy resign, because I have only this one coil enclosure.

Best regards to all

Hi Ivconic.
Please help. What you think about this problem with my TGSL or maybe coil?
Regards,

[kuraja]

I use USB cable!!! And can say for sure that it works for me. Cable must be somehow connected to the metal outer part of connector! Anything metal and not well grounded is a problem. For example if you are using metal housing, then ground it.
I see why people complain, but seriously why complain about depth if you have faulty ground somewhere.
TGSL is a nice unit! Stabile when the right coil is on. I personaly use a small coil of 20 cm diameter; pinpointing usage. Coins are detected in air for about 23-25 cm, but I should say that the most important thing here is DISCRIMINATION! It works superb! Not even a tik (or tok!) for steel nor iron, use headphones, can touch cable, connector cos they are grounded! All metal is good for pinpoint, current draw about 28mA, I use one LM308 and one TL081, made up a capactor at Rx of 18nf (12nf+6.8nf parallel), I think if you can't have a nice coil then you could make a nice capacitor instead! Just fix it to the right freq. and It has to work damn it! Use brain some electronic knowledge (some ), and don't be greedy, cos the stability is the goal not depth!!! Trust me!
Take care!

[Darko]

I use USB cable!!! And can say for sure that it works for me. Cable must be somehow connected to the metal outer part of connector! Anything metal and not well grounded is a problem. For example if you are using metal housing, then ground it.
I see why people complain, but seriously why complain about depth if you have faulty ground somewhere.
TGSL is a nice unit! Stabile when the right coil is on. I personaly use a small coil of 20 cm diameter; pinpointing usage. Coins are detected in air for about 23-25 cm, but I should say that the most important thing here is DISCRIMINATION! It works superb! Not even a tik (or tok!) for steel nor iron, use headphones, can touch cable, connector cos they are grounded! All metal is good for pinpoint, current draw about 28mA, I use one LM308 and one TL081, made up a capactor at Rx of 18nf (12nf+6.8nf parallel), I think if you can't have a nice coil then you could make a nice capacitor instead! Just fix it to the right freq. and It has to work damn it! Use brain some electronic knowledge (some ), and don't be greedy, cos the stability is the goal not depth!!! Trust me!
Take care!

Thank you very much man. I hope finally I will solve problem with my TGSL. I will try what you say and will „smućkati“ something and hope, sun, will go to the field.
Best regards and thank you yet again.

[Darko]

Thank you very much man. I hope finally I will solve problem with my TGSL. I will try what you say and will „smućkati“ something and hope, sun, will go to the field.
Best regards and thank you yet again.

Instead "sun" was should "soon". I still learn language.Sorry.

[simonbaker]

I think if you can't have a nice coil then you could make a nice capacitor instead! Just fix it to the right freq. and It has to work damn it!

That's what I keep thinking, but haven't proved it yet.

-SB

[salim]

hi can i use tl082 instead tl072 and lf442 thanks for help

[Max]

hi can i use tl082 instead tl072 and lf442 thanks for help

Hi,
you can. TL082 and TL072 are, also, about same stuff. Don't use instead TL062 , too noisy stuff, avoid.

Kind regards,
Max

[metaldetector107]

TGSL

Dear Ivconic
Warm greeting, actually I have a small problem and hope take it easy I have no other choice.
The problem when sens about 1 or 2 the machine very calm but just make abit higher it chatter too much and 5cm long ferrit lower than 5cm gives you clear signal not just crack no matter adjusting GEB,, this is in Disc mode
About all metal it will crack all the time.
The detection depth 25, 26cm for 2.5cm coin

Both coil shielded well and TX is 6mh RX 6.5mh exactly the resistance about 25 ohm the wire gauge 33SWG which mean 30AWG in American standard .
I am using kitchen foil for shield. The cable is double shielded and correct wirement .
I do apologize again but I need help.

Kind regrads

[Qiaozhi]

Dear Ivconic
Warm greeting, actually I have a small problem and hope take it easy I have no other choice.
The problem when sens about 1 or 2 the machine very calm but just make abit higher it chatter too much and 5cm long ferrit lower than 5cm gives you clear signal not just crack no matter adjusting GEB,, this is in Disc mode
About all metal it will crack all the time.
The detection depth 25, 26cm for 2.5cm coin

Both coil shielded well and TX is 6mh RX 6.5mh exactly the resistance about 25 ohm the wire gauge 33SWG which mean 30AWG in American standard .
I am using kitchen foil for shield. The cable is double shielded and correct wirement .
I do apologize again but I need help.

Kind regrads

You will probably have difficulty rejecting a 5cm length of ferrite. Ideally you should use a small ferrite slug to set the ground balance. What happens if you take the detector outside and bob the coil up and down over a patch of soil without any targets?

[metaldetector107]

TGSL

Dear Qiaozhe
thanks for your kindness.
actualy the machine abit better in the field cuz lack of elecrical,
but but when trying higher Sens over 2" 3" the machine goes crazy
today i adjusted the GEB like before but this time what i noticed is
when reject ferrit it does detect iron i tryed to make the device like before but i could not!!!!! it was easy for me to adjuste it and back it to default but to day more than 1 hour i coud not so now i am very disappointed.. my device was good at lower Sens but everything upside down, could you help please?
kind regards

[peroon]

"... but everything upside down..."

So it is SLGT not TGSL?

[Qiaozhi]

Dear Qiaozhe
thanks for your kindness.
actualy the machine abit better in the field cuz lack of elecrical,
but but when trying higher Sens over 2" 3" the machine goes crazy
today i adjusted the GEB like before but this time what i noticed is
when reject ferrit it does detect iron i tryed to make the device like before but i could not!!!!! it was easy for me to adjuste it and back it to default but to day more than 1 hour i coud not so now i am very disappointed.. my device was good at lower Sens but everything upside down, could you help please?
kind regards

I think that, with all problems you're having, it would be better for you to buy a 5-pin Tesoro coil and connect that to your TGSL. At least you will discover whether the electronics are ok, or the problem is really with your homemade coil.

[simonbaker]

What is your voltage at C12, C15?

(I moved to separate thread)

[kuraja]

Ok! Now here is my strange looking coil.


As you can see, the smaller diameter will offer more pinpointing feature in high trash areas where depth isn't an issue. Although, the depth of this 20 cm coil is in air about 25cm for a 1.5 cm coin.
I do advise to null at ALL METAL! Later switch to disc and see if the iron is rejected. If not, you nulled wrong! Try again, in all metal mode. If you here double beep after one swing of a coin, then something is wrong at the coil connection (my guess is Tx). Reverse the connection and try again, until you get single beep at any hight by swinging the coin. I do prefere nulling by using a BOTTLE CAP, yes! A bottle cap. It is Al metal, very good to see if your coil is getting enough depth and the detector will be sensitive to gold. Switch then to disc, and remember, when nulling, always leave disc pot at 1/2 of the range, and move slightly to 65%. You will then be able to dicriminate between iron, steel and rest of the metal easily.
Hope this helps, and remember, no Discrimination, no real TGSL.

[simonbaker]

Ok! Now here is my strange looking coil.


As you can see, the smaller diameter will offer more pinpointing feature in high trash areas where depth isn't an issue. Although, the depth of this 20 cm coil is in air about 25cm for a 1.5 cm coin.
I do advise to null at ALL METAL! Later switch to disc and see if the iron is rejected. If not, you nulled wrong! Try again, in all metal mode. If you here double beep after one swing of a coin, then something is wrong at the coil connection (my guess is Tx). Reverse the connection and try again, until you get single beep at any hight by swinging the coin. I do prefere nulling by using a BOTTLE CAP, yes! A bottle cap. It is Al metal, very good to see if your coil is getting enough depth and the detector will be sensitive to gold. Switch then to disc, and remember, when nulling, always leave disc pot at 1/2 of the range, and move slightly to 65%. You will then be able to dicriminate between iron, steel and rest of the metal easily.
Hope this helps, and remember, no Discrimination, no real TGSL.

Why does disc/all metal switch affect your nulling? What are you looking at?

If nulling by testing depth with coin, then yes, it matters.

Regards,

-SB