TESORO GOLDEN SABRE

[Bayu]

The GB adjustment pot is very touchy and may need to be tweaked a tiny bit. Do this on the red soil by pumping the coil up and down, closer to - farther from soil. Adjust GB until no response from bring it near the soil.

I had the same thing when I built the TGSL and GB needed a very small tweak.
Do recheck on a silver coin to ensure the GB isn't turned too far.

I've tried pumping above the ground, I set the GB from min to max but the ground is still detected. our land is like the land in australia, is there anything i should change on my machine?

[Bayu]

connect an o-scope to preamp output. bring the red soil above the coil, give us video what you see on a screen.

this is a picture of the preamp lf353 pin 7. I used red bricks as an illustration of mineral soil, when I put the bricks on the coil, there was no change, which means the picture doesn't seem to change

[kt315]

connect an o-scope to preamp output. bring the red soil above the coil, give us video what you see on a screen.

[waltr]

hello everyone, I hope you are always healthy. few days ago i have built TGSL EDU, all components as per directions on pcb board except bf245 replaced 2sk30a and lm 308 d replaced ua741. coil I use 23cm air test results are good, 2gram 18k ring detected 25-28cm, but there is one problem! when I test on high mineral soil / red soil, it always sounds even though there is no target. GB, SENS, have been set in such a way that they are still detected. any solution for my TGSL? thanks

The GB adjustment pot is very touchy and may need to be tweaked a tiny bit. Do this on the red soil by pumping the coil up and down, closer to - farther from soil. Adjust GB until no response from bring it near the soil.

I had the same thing when I built the TGSL and GB needed a very small tweak.
Do recheck on a silver coin to ensure the GB isn't turned too far.

[Bayu]

hello everyone, I hope you are always healthy. few days ago i have built TGSL EDU, all components as per directions on pcb board except bf245 replaced 2sk30a and lm 308 d replaced ua741. coil I use 23cm air test results are good, 2gram 18k ring detected 25-28cm, but there is one problem! when I test on high mineral soil / red soil, it always sounds even though there is no target. GB, SENS, have been set in such a way that they are still detected. any solution for my TGSL? thanks

[surfdetector]

We have elaborated the production of such coils on several occasions at the forum.
I once gave a PDF somewhere with instructions. And later Don Bowers gave an even better and neater PDF with more complete instructions.
You just have to look for those files on the forum.

https://www.geotech1.com/forums/showthread.php?15710-TGSL-Complete-Details

[ivconic]

Older series of Tesoro coils have very unique specifications, I don't know if anyone has ever made similar ones.
TX=5.7-6mH and RX=6-6.5mH, 18-22 ohms.
So the hobbyist is forced to self-build. Which is not a problem.
We have elaborated the production of such coils on several occasions at the forum.
I once gave a PDF somewhere with instructions. And later Don Bowers gave an even better and neater PDF with more complete instructions.
You just have to look for those files on the forum.

[Carl-NC]

Tesoro coils.

[mostafalesnar91]

why no one answer???

[mostafalesnar91]

Eglish, please. Thanks.

Which company metal detector loop is closer to TGSL loop in terms of inductance ???

[mostafalesnar91]

this detector is really not for beginners...I made about 5 copies
este detector realmente n?o ? para iniciantes... fiz cerca de 5 c?pias

5 times
it's better that you don't make it at all!!!

[Carl-NC]

Eglish, please. Thanks.

[folharin]

todos s?o dif?ceis e voc? realmente tem que ser um t?cnico em eletr?nica para saber como constru?-lo

[folharin]

this detector is really not for beginners...I made about 5 copies
este detector realmente n?o ? para iniciantes... fiz cerca de 5 c?pias

[folharin]

todas as respostas est?o no f?rum