TESORO GOLDEN SABRE

[macobt]

....

....

[karlos x]

coil

TX = 100 /6 mH / 0,25 mm

RX = 105 / 6,5 mH / 0,25 mm

Shape 255x137 mm for DD coil......for pictures...search this forum....maybe
1- 50 page......


Good luck !

[tiktak]

Hi

Hi,
Ivica.
How are you?
Can you please tell me how you substitue 2N2222 with BC107 and 2N2907 with BC177 or the oposite?
Thanks
p.s.I am almost ready with my first TGSL1265.Will post resuls soon.

[macobt]

hi karlos
you build this detector,and this coils you made yourself
how is the deep of this coils,you can send me a picture

[Friday]

hi all...
I made TGSL 1265. ......and it's coil's turn...
which one coil is the best other's? please, can you tell me?
Regards....

[xix]

Add-on to TGSL

I'm new on the forum and I've just finished my TGSL. By the way it is working pretty well and I'll try it on the field next week-end.
My question is now: Can we add some kind of discrimination indicator (like a micro-amp.) that could give us immediately an indication if it is a ferrous or non-ferrous target (instead of playing with the disc. level pot.)?
Cheers

[Friday]

ok firstly I will make this coil

0.30 mm wire. 235mm diameter OO coil.
RX=150w
TX=140w

[Unregistered]

I'm new on the forum and I've just finished my TGSL. By the way it is working pretty well and I'll try it on the field next week-end.
My question is now: Can we add some kind of discrimination indicator (like a micro-amp.) that could give us immediately an indication if it is a ferrous or non-ferrous target (instead of playing with the disc. level pot.)?
Cheers

in disc mode you don't pay attention to the knob, at any position it will reject iron

[karlos x]

ok firstly I will make this coil

0.30 mm wire. 235mm diameter OO coil.
RX=150w
TX=140w

Try next :

DD coil 255x133 mm
TX = 100 w 6 mH 0,25 mm without warnish(with warnish 0,27-0,28 mm)
RX = 105 w 6,5 mH 0,25 mm without warnish(with warnish 0,27-0,28 mm)

f= 14,4-14,8 kHz

ground balance set with ferite rod at 5-10 cm near coil,set trimer to non detect or some "crack" for ferite and wel be ok...

Recomended to read all post....!!!

[xix]

in disc mode you don't pay attention to the knob, at any position it will reject iron

Thanks Unregistered.
My idea would be to get some kind of target evaluation without being always touching the button of discrimination level
Cheers

[karlos x]

DD

ok firstly I will make this coil

0.30 mm wire. 235mm diameter OO coil.
RX=150w
TX=140w

See page #14 post 330/333/347

[simonbaker]

Guys I trashed the damn board! I desoldered almost all valued components and I'm making new board for the TGS. Bolder traces, higher copper thickness, no ground plane..
(it could be the plane doing the nasty stuff around, I think I prefer the chatters for a starter)
--
I also needed some additional stuff (pots, diodes, etc) and had the chance to order few more ICs for testing so soon we will have BATTLES:

1. LF353 (metal can) vs LF353N (ST) vs LT1057 (LT) vs TL082 (TI)
2. LM393 (ST) vs LT1018 (LT)
3. LM308 (motorola) vs LT1008 (LT)
4. LM358 (ST) vs TL082 (TI) vs OPA2277 (BB-TI)

Funny thing is that the LF353 metal can looks old, perhaps 10 years old, taken from old russian TV Elektron
( and they are famous all around with the weight - more than 100 pounds, tons of parts I tell you ..)
Manifacturer logo looks like a triangle, can't recognize it.
We'll see how the Old timer works :P

PS: Check out the avatar I think it's the most appropriate!
Cheers

Hi Eclipse -

I was thinking of using your board because more spread out than Ivconic's I think; I have many bulky parts , probably need the extra space.

Question: Are all your parts pin-compatible with TGSL gift pack schematic parts, or are do we need to use special parts in places or reverse leads, etc?

Also: you were going to make a 2nd PCB layout, more simple; were you able to do that? Is that available to?

BTW: I have always wondered if power supply capacitor 220 uF C29 is on wrong side of LM7808 -- Qiaozhi seemed to think it should be on output, not input. It would be nice if you could make your layout so we could put it on either side of LM7808 (or both!).

Hope your second gen TGSL is coming along well.

-Regards

-SB

P.S. Is your layout file looking from top (component side) or bottom of board? I'm never sure without detailed checking pins.

P.P.S. Do you have any jumper wires on your board, or just traces? Is is single-sided?

-Thanks

[simonbaker]

Thanks Unregistered.
My idea would be to get some kind of target evaluation without being always touching the button of discrimination level
Cheers

I think we'd need a "ratio" circuit that gave ratio of outputs of LM308s independent of amplitude.

[xix]

I think we'd need a "ratio" circuit that gave ratio of outputs of LM308s independent of amplitude.

Thanks Simonbaker.
What do you mean by ratio circuit? a comparator that measures the differences on LM308's ouput signal?
Cheers

[Qiaozhi]

I think we'd need a "ratio" circuit that gave ratio of outputs of LM308s independent of amplitude.

Thanks Simonbaker.
What do you mean by ratio circuit? a comparator that measures the differences on LM308's ouput signal?
Cheers

The problem with trying to display the target ID on a meter - especially with the TGSL, which is an analog detector - is that the phase-shift produced by the target is dependent on the distance from the coil. There is little point in providing a ferrous/non-ferrous indication, as the TGSL always eliminates ferrous targets when DISC is switched on. The main difficulty with making your own coils is adjusting them such that the DISC control provides minimum discrimination when turned fully left, and maximum discrimination when turned fully right. This is why the initial phase adjustment is so important. Otherwise the minimum setting could end up in the middle, for example.