TESORO GOLDEN SABRE

[ivconic]

....

Vcc is +8v, Vdd is -6.xx v

+Batt. is +12v and -Batt. is -12v....which means directly to one and only battery....if used 9 v batt, than same thing...

I am using 12v /1.3Ah accu. to supply G.Sabre....If want to use 9v batts than use it, no problem. To last longer you may use 2 of them connected parallel....- more current, same voltage...

regards

[okantex]

Hi
"
Vcc is +8v, Vdd is -6.xx v
"
I did not understand these words.
what do they mean in technically.
in zahori they were connected to battary +9 and-9 .

here you say+8 -6 .what will I do these pins.
I wantted to say.will I use two battaries .one 9v for Vcc and Vdd of audio another 12v battary for other pins of audio and the pcb.


if I use 9v for all will I loss performance.if so I do not want to use 9 volt.if ICs need 12v I will use 12v.in schematic there is tl062 .does not it need 12v as I remember from delta.

[nelson]

Golden sabre question?

Hi Ivconic, i m working on golden sabre project and my question is if this detector is good on detecting gold nuggets?
Mine will be finish in a week or two, so for it i have plan to make a standar coil and also a small one. The idea is to have a machine for gold nugget hunting and coin shooting.
My garret ace 250 is doing very good, but lacks on deep (only 8 inches maximun for a coin) and no sound adjustment. Also cant detect a 1 gram gold nugget.
Your knolegment and experience will be very helpfull to finish this golden sabre projects.
Best regards and congratulations for your big support to metal detectors builders.
Nelson

Extreme good results!!!
I finished packing it in box.Also finished smaller coil and preparing a bit larger.
Both tested.
1cm coin at 36cm with larger coil, absoulute stabile, no drifts,no hums,no false signals!!! Discrimination perfect!
1cm coin at 30cm with smaller coil.........rest same as with larger!
Smaller coil tested on ground. 29cm depth detection of 1cm coin burried in ground! Much better than Musketeer!
" ...if Minelab can do, why dont we?"

I told you...didnt i?

Both coils same inductances; 6.5mH for Rx and 6mH for TX.... (double D)

Larger 26x26cm and smaller 24x13cm (double O coil)


What to say?
I guess i was sort of blind, wasting my time with Classic so far....

This Golden Sabre is perfectly optimized, thats why so good results!
I dare to say that it is much better than Bandido too.
So....thats all so far!
Regards

[Geo]

Vcc is +8v, Vdd is -6.xx v

+Batt. is +12v and -Batt. is -12v....which means directly to one and only battery....if used 9 v batt, than same thing...

I am using 12v /1.3Ah accu. to supply G.Sabre....If want to use 9v batts than use it, no problem. To last longer you may use 2 of them connected parallel....- more current, same voltage...

regards

Hi Ivica.
Please did you receive the mail of Eldorado pcb??
Regards

[erolunall]

golden sabre connection

Hi İvconic and all

I saw that connection of Y is not shown anywhere.
There are x--w connection all met/disc connection.
Where we will connect Y?
near x--w connection all met/disc or not?
Regards
Erol

[fitos]

desoro golden sabre connection

Hi İvconic and all

I saw that connection of Y is not shown anywhere.
There are x--w connection all met/disc connection.
Where we will connect Y?
near x--w connection all met/disc or not?
Regards
Erol

Hi erolunall
YES connect near W

[ivconic]

.....

Yes Geo i received it.I already had it...never mind, thank you anyway!
Best regards!

Okantex,
In G.Sabre you have 7808 type regulator giving +8 volts.
Also you have chopper which should generate arround -8 volts theoretically. But,practically
no need to expect "clear" -8 volts from it. It should generate arround -6.xx volts which is
quite enough to run G.Sabre properly.
I am using 12v/1.3Ah battery with my G.Sabre. Audio is consuming some power, but still has no
affects on overall performaces, so you do not have to worry about that.
If you want to use 9v battery, fine..it will work. Due lasting longer you may use 2 of them
in parallel connection.
"...if this detector is good on detecting gold nuggets?..."
Yes. I think it is suitable, although i havent tested it on those. Mostly i tested it on
coins and small items and it is working perfect!
Asuming that you'll have to make smaller coil for nugget hunting. I suggest you to make
4" to 6" coil for that purpose.
Garret ace 250 is good detector but not compareable with G.Sabre at all! No competition!
....

[nelson]

Golden Sabre

Hi Ivconic and many thanks for your comments. yes i think i ll do two coils. One for coing shooting and the smaller one for gold hunting.
My circuit is 40% advanced and if i have the time i think it will be ready in a few days and of course i ll post my experiencies.
Best regards
Nelson
Santiago, CHILE >SA

Yes Geo i received it.I already had it...never mind, thank you anyway!
Best regards!

Okantex,
In G.Sabre you have 7808 type regulator giving +8 volts.
Also you have chopper which should generate arround -8 volts theoretically. But,practically
no need to expect "clear" -8 volts from it. It should generate arround -6.xx volts which is
quite enough to run G.Sabre properly.
I am using 12v/1.3Ah battery with my G.Sabre. Audio is consuming some power, but still has no
affects on overall performaces, so you do not have to worry about that.
If you want to use 9v battery, fine..it will work. Due lasting longer you may use 2 of them
in parallel connection.
"...if this detector is good on detecting gold nuggets?..."
Yes. I think it is suitable, although i havent tested it on those. Mostly i tested it on
coins and small items and it is working perfect!
Asuming that you'll have to make smaller coil for nugget hunting. I suggest you to make
4" to 6" coil for that purpose.
Garret ace 250 is good detector but not compareable with G.Sabre at all! No competition!
....

[okantex]

I have Added some points like
A! ,A2 ,A3 to the shematic.

do you mean A1 must be connectted to Y .
and rest are empty.

[nelson]

A few questions about G. Sabre

Hi Ivconic, i have a few question about G. sabre:

1.- What are the inductances for TX and RX coil?
2.- Do you have construcción details for a 4" or 6" coil?
3.- Did you modified the audio circuit and how?
4.- You said that you are running the detector from a 12 V source. My question, did you connected it directly to 12 V or did you use a voltage regulator?
Finally, do you or someone else, have the Golden Sabre manual to share?

Regards
Nelson

If you think on very big iron items...than dont worry! It is quite normal to make some sound on it even in full disc. mode....Dont worry. Same with few Minelabs i owned so far, same with Garrett, Fisher,White's.....
I checked this behaviour on scope with G.Sabre;

I can see huge rise of amplitude after first ampification at RX...but there is no tone or in some cases "cracked" tone which is very significant so on real field i can be absolute sure that it is iron mass.....
Very interesting is observing ferrite detection on scope;
no sound at all but huge...and i mean huge rise of amplitude!?

I finally gained what i wanted with this last coil of mine; DD coil, 21cm diamm.
0.25mm wire, TX 141 wind. and RX 150 wind.....
Main geag is when nulling coil strictly to use ferrite rod and adjust balance just slice to "crack" on rod, but only when it is so close to coil to touch it...
Than you can see that there is no sound when ferrite rod is in the middle of coil (center) but on edges it still produce "cracks" in audio....
That is well balanced coil. I tested it yesterday on very "sharp" fieald with high level of mineralisation and it showed excellent performances!
No false signals at all. Discrimination -perfect! Depth also excellent!
Found one small roman coin deeper than 15cm.....(bronze)....
But i also noticed very poor sensitivity on small and middle iron items???
Only very large iron items are detected well. Heh!? I think we cant have all!?

I dont like Bandido....sorry.... I do like G. Sabre very much cose i am coinshooter mostly...it showed as excelllent on coins so far...


Try to observe Bandido behaviour on scope while detecting various items.....
You'll see interesting things...


Few days ago i heard "bijou" that G.Sabre, such as other Tesoro's are not working well with DD coils....!? Ha,ha,ha,ha,ha,ha!!!!
Not true!

Best regards!

[nelson]

Coil Inductances

Hi Ivconic, please forget my question about coil inductances, because i had read previous post from you and this explain with details what i have asked.
Regards
Nelson

O.K. Unregistered, i failed to make proper coil, i suppose...Anyway, i am satisfy with this one. Why dont you register and join the club? We need more people here on this subject. Best regards!
Geo, yes i tried with CL3 and results are very good. But OO coils for CL3 are different...step up relation 1:4, you know what i mean...

Now in addition post i prepared early this morning but not posted until now:

My last post i posted with one eye focused on watch, to avoid "time out"
message here. I just finished for today (night) dealing with G.Sabre and
coils. I am so tired, exausted you may say. Whole day, yesterday i spend
experimetning with different coils. That's why my last post is so sloppy....
even with gramatical&syntax errors. Sorry people!
Few things i forgot to write here;
first, i used 0.3mm wire for TX - 97 turns on 22cm former than reassembled
and same wire used on 11cm former! Inductance is 6.7mH,
resistance 23.7 ohms.
I also used 0.4mm wire for RX.....sheeesh! I dont remember that i measured
inductance at all !!!??? Sheeesh!
So, 145 turns for RX...(finall RX coil).I also made 3 more RX coils with turns
from 88 to 160, and with wire from 0.3mm to 0.5mm. Than i experimented with all
RX coils i made....All of those 4 RX coils worked pretty good? Which leads me to
conclusion than G.Sabre RX input have sort of wide "band width"?! Finally i decided
to use 145 turns RX coil cose noticed better performances than with others...
I made farady cage with Al foil on both coils. I think this is crucial for
stabillity. Also way how to connect F.cage in overall setup.
I noticed quite obvious variance beetwen schematic and pcb. There is not connection
between RX inputs and gnd on pcb, while it is made on schematic!?
I wasnt sure which way is correct (although checked all Tesoro schematics and saw
no connection on those), so decided to try both ways and see the difference.
There is difference in stabillity; pretty unstabile when RX connected to gnd, despite
F.Cage (coupling, twisted pair or something else....), never mind.
But when RX not connected on gnd (respecting only pcb), coil is very stabile.
To check that, i "punched" cables,coil,pcb....shaked,twisted....tortured it on many
ways.....and it was very cool! Not even one false signal! Very,very good!
But! The secret is in way how to connect F.cage; i connected both AL foils very
shortly (as short as could be, due certain movements while adjusting coils)...
Than both Al foils (F.Cage) connected also shortest way to gnd side of TX.
Than used 1 coaxial and one "twin lead" cable and made connection with pcb.Coaxial
is for TX and twin lead for RX. And that is all. Perfectly stabile.
Oh i forgot, i used 12cm former for both coils to wind. Very small, isnt it?
But results were astonishing! 2cm coin detecting at 27cm distance in all metal mode and
22 cm in disc mode! I can only imagine results with larger diammeter coil!?
Cigarretes package detected over 40cm! Cola can over 50cm !
Discrimination is very good, much better than Classic 3...Sensitivity to small gold
items also very good, much,much better than Classic 3!
Somehow, i have feeling that this is not all. I did all this very sloppy, experimenting
all day, without concrete concept. Just "playing" with different coils and setups....
At the end, very tired, i lost concentration and decided to take rest for a while, until
be able to make any conclusions from that experiences and establish proper method for
making this type of coil by some standards in future.
I also wish to experiment with larger diammeters and see limits.
Results are more than good. But remember that all is done on the table, in workshop!
It will need to take out this coil and put it under real tests, in real conditions.
I am encouraged even now, cose it showed great stabillity. Comparing with my previous
experiences with CL3 and other coils (big number of those) i have great expectations
from this coil on the real field,outdoor....But we will see.
Dont forget great Minelab and its DD coils, probably the best coils on market today!
I always keep thinking on TS800 18cm coil for Musketeer, which showed best performances
ever in my not so poor experience on that matter.
DD and OO coils are pretty much simillar, almost the same concept....so if Minelab can do,
why not we?
I tried to keep preferences of coil as close to original as i can. So inductances are
pretty close to original.....arround 6mH...some to 6.5mH....Resistances are also close....
22 to 23 ohms....I used wires from 0.3mm...some to 0.4mm...
Only one thing bugs me with this G.Sabre i made;
When switching ON, at first, there is constant audio tone for 3-4 seconds, than decays and
stops. Than it is ready and start working perfect! Is this normal!?
If it is not, than i suspect some capacitor maybe not good, or maybe some fet or transistor?
Cose i used very old J107 fets from very,very old and rusty scraped pcb...dirty and look
100 years old! They all looking good, but those are very old components...."exausted" much!
Also, i put very old (but tested and good) Bi-polars....Heh, 2 of them are 4.7uF and 2 of them
3.3 uF....I couldnt find 4 same....so i put 3.3 just to test device, and those stayed on it.
Also i put old elco's (220uF), but also previously tested with cap. meter.
In TX i put BC557, in audio put MPSA14....i forgot; in TX and in chopper there are 2 BF245b
still (not replaced with J107)....the rest of fets are J107's....
IC's are all originals - no replacements.
So, why it "singing" when switched ON for few seconds? Anybody have any idea?
Regards!
P.S.
Be free to make simillar coil. I am not joking at all, not lying for sure!
Make your own coil and see. Later post here your results. I would like to see if any
differences? Also i would like to hear some more tips here about this (now free to say)
very,very good detector!

[erolunall]

golden sabre

Hello
I made tesero golden sabre and it is working like İvconis but not same performans same When switching ON, at first, there is constant audio tone for 3-4 seconds, than decays and
stops. Than it is ready and start working .

but performans not same 10x10 metal its signalling fom 25-30 cm

Coil 0.25 mm and 23 cm same turn with ivconics but it is not 23 ohm
it is 36 ohm resistance .
I can not find 4.7 bi polar capacitor
I connect 2 10mf capacitor - ++ -
to get 5 mf ..all of other parts same with schematic.
if anyone have any sucession to improve performance?

[Marin - Bulgaria]

Hello
I made tesero golden sabre and it is working like İvconis but not same performans same When switching ON, at first, there is constant audio tone for 3-4 seconds, than decays and
stops. Than it is ready and start working .

Turn the transistor MPSA13 (BC517)

[Unregistered]

The startup sound is the batt. check, this is normal !

[Max]

Hello
I made tesero golden sabre and it is working like İvconis but not same performans same When switching ON, at first, there is constant audio tone for 3-4 seconds, than decays and
stops. Than it is ready and start working .

but performans not same 10x10 metal its signalling fom 25-30 cm

Coil 0.25 mm and 23 cm same turn with ivconics but it is not 23 ohm
it is 36 ohm resistance .
I can not find 4.7 bi polar capacitor
I connect 2 10mf capacitor - ++ -
to get 5 mf ..all of other parts same with schematic.
if anyone have any sucession to improve performance?

Hi,
I'm not sure...of all...but I have original tesoro coil...and can't be 0.25mm diameter wire for sure! Must be something more...use e.g. 30AWG or more...
you need 6.5-7mH and about 22-23ohm resistance. In homemade coils special care is needed to null rx signal with bucking coil. Be very careful...use scope (if you have it) measure just some few mV peak-to-peak...or you'll overload your detector...thus resulting in loss of depth.

Read old posts about tesoro's coils...all you need is just right there.

Best regards,
Max