TESORO GOLDEN SABRE

[Max]

What do you say to modify the TGS??
If we add a channel for Pinpoint ?? (the upper LF442 from Royal)
Regards

Hi Geo,
About the mod: yes we can do very easy... just add the upper channel of royal to TGS and will have it. Another fet + the double op. amp. and some other stuff... + the 3-position switch like in bandidoII... with "retune" position I mean. That's it.

Real question is: it's worth having it on TGS ?

I personally don't think it's a big improvement having a pinpoint function on TGS unless you use a concentric coplanar coil... then not for me, I use a large DD coil with it... and you know that's not the same thing of having a polo or 9x8'' concentric coplanar to do the same thing.

With round CC coils is very nice using pinpointing (like e.g. in bandidoII) to better find the spot were the target is just under... but with DD coils ...and great too it's not the same thing.

You will find the central line were target lye but then you have X-ing it by another angle to find the spot... of course, better than having just motion detection... but I think that's about the same in practice: you have to search for target much more than with concentric.

What do you think ?

Best regards,
Max

[Geo]

Hi Max
I see this tread (pinpoint) with 2 different roles.
From the one side you have absolute right.
But the other side (mi side) says other ......
Most of us constructing detectors only for hobby, to see how it work and to spend happy our time (other way is more cheap to buy a top model). So why to don't experiment with TGS pinpoint ???????/
My regards

[Max]

Hi Max
I see this tread (pinpoint) with 2 different roles.
From the one side you have absolute right.
But the other side (mi side) says other ......
Most of us constructing detectors only for hobby, to see how it work and to spend happy our time (other way is more cheap to buy a top model). So why to don't experiment with TGS pinpoint ???????/
My regards

Hi Geo,
yes sure. I agree ...we can play with this feature too... it's also easy to apply to existent TGS design... and requires few stuff more.

What I said is just that maybe this feature is not so essential or useful for who made already the TGS using a DD coil... but then anyone is free of doing so if think it could be a good thing for testing... or using better the detector in the hobby.

I think is not good FOR ME... and that apply just to me cause other people could think otherwise.

The same for "2 tones" of royal approach... I think is no good but others can built it on TGS using same circuit parts.

They work for sure also on TGS that's pretty similar for other parts so... anyone will choose what's better for his personal needs... if adding them or not.

Best regards,
Max

[Max]

Hi,
made a bit of "patchwork" with royal and TGS... uhm

though I'm not really interested in that... just to spend by 5cents !

Will it work ?

Who knows ? I've made in 5 minutes... don't take it for tested thing ... it isn't !

Only way to know is try it... but I can't so I don't care too much

Purpose is changing all-metal from motion to non-motion mode (for pinpointing targets) and add, of course ,the fast retune as in the royal sabre.

Ideas ? Comments ? Dubts ?

Kind regards,
Max

[ivconic]

Hi Max

I see this tread (pinpoint) with 2 different roles.
From the one side you have absolute right.
But the other side (mi side) says other ......
Most of us constructing detectors only for hobby, to see how it work and to spend happy our time (other way is more cheap to buy a top model). So why to don't experiment with TGS pinpoint ???????/
My regards

Interesting point of view Geo.
I have to add here something more(might be important for newbies);
I am full time prospector. This growed more than plain hobby to me!
Tesoro Golden Sabre (Light) is more than serious machine - beleive me!
You will realize this first time you visit some serious terrain (plenty of those in Greece). All laugh stopped when i started to collect serious items with it!
Comparing to previous results with other machines, TGSL is winner without questions. As "hi-profile" prospector i am not visitng any more "lite" terrains just for fun. That time passed long time ago. Further i am not really interested to waste to much time on distinguishing what type of metal is detected. Only thing really interesting me is: iron or coloured metal? So having full scale of discrimination is not most important thing. Usually i move very quickly when prospecting. When it beeps pretty clear in disc mode i dig, otherwise when it is obvious that iron is detected i usually do not dig. Using this method i am able to walk over huge area in no time. Do not waste to much time on diging "suspectable" signals. And usually this method gives much of benefits. Pockets or bag full with coloured items. Aint no doubts in received signals...why? Cose terrains are far away from any civilisation, roads, places man usualy visit. So few possibility, that coloured item to be some junk or simillar. TGS is very serious in those situations.Deep,fast and efective! About Disc scale; most important thing for me here is possibillty to reject foils! Great TGS! Adjuted Disc. pot at "6" absolutely rejects foils (cigarettes packages,chocolate packages...any other kind of Al foil, pull tabs etc)...
So this project - TGSL is much more than just constructing exercise to me.
If i return back to 1996./97. and think again.....i actually was prospector and started with constructing...not constructor who later started prospecting...
Despite other machines i have/had (Garrett GTI2500, Eagle II,1266,Colt,1220B,CZ5,Troy X3....) i do respect this TGS much cose it showed as very useable and much faster to work with than many others.
Second one i can put in my favorite list should be Troy X3 (no doubts)! But sad fact is my X3 is unadjusted and temporary unuseable....Damn!
Regards!

[Geo]

Hi Ivica. I did n't finished the coil yet so i ask you.
I have a farm that it has a lot of ceramics and a lot of bronze coins. With xlt and gti when i reject the ceramics i lose a lot of depth. What about TGS???
Regards

[ivconic]

You dont need to move Disc. pot to reject ceramics at TGS. You can adjust it with GEB trimmer to void ceramics,hot rocks and simillar. But you have to take it there and adjust it at that moment under those conditions...It will work just fine....of course you must make good coil...DD coil!
Regards!

[Max]

Hi Ivica. I did n't finished the coil yet so i ask you.
I have a farm that it has a lot of ceramics and a lot of bronze coins. With xlt and gti when i reject the ceramics i lose a lot of depth. What about TGS???
Regards

Hi,
bricks ? pottery ? ceramics ? red-fired-clay ?

It's easy on TGS... all you need is setting good geb... as Ivconic suggested... disc of D-90 circuit will not pick up any of these if unit is well ground balanced.

Of course, large hot rocks or fired stuff could give problems but the situation is not even comparable than with PIs or other simpler VLFs.

Belive me... TGS is another story about that.

Kind regards,
Max

[Max]

Hi Ivconic,
have you made both Goldy and Vladimir's PCBs ?

If so... what about erratic noise ?

I'm trying to figure out what to do with a TGSL I wanna made but I'm puzzled about what PCB to choose cause there could be problems with noise propagation respect to the original (large) board that has notch.


What you suggest ?
What's your impressions ?

Kind regards,
Max

[ivconic]

No. I havent finished Vladimir's pcb yet. I put few components on it ad left it somewhere in a pile of pcb's.Nice pcb, small...Now i have 8 Goldy's already finished waiting to be packed in housings. So i am doing one by one these days. Goldy pcb (1. version) is working very good.I have no complaints. Try it. These days all things going very slow here,at my place. I have a lot of other things to do....that's why am a bit lazy and tired to spend less time in workshop. Last 10 days was raining like from the bucket! Damn rain! Tomorrow and day after tomorrow should be better, so i was hoping to go outdoor, on the field...We'll see.

[gagi_pirot]

beginer

Hi guys. I just wanna say that you just got another freshman on coledge. I hope that I aint gonna bug you around real hard with very stupid things like someones in the past- maybe just a bit less. :-) Well I was here on this forum for a couple days, read several pages and as reading your posts something snap in my head: I must join these guys in building Tesoro, and stop looking it from side.
Yesterday i built a pcb in a few hours, but cant get all of the components at once. So, its gonna be a loooong week.

ONCE AGAIN HI TO EVERYBODY IN HERE!!!

I have 1 question, anybody: is there a diference betwen using BF245c and J107, and what is it?
Pozdrav za sve nase!

[gagi_pirot]

HA HA :-) DONT FALL ON THAT I WAS JUST JOKING. C U ALL VERRY SOON

[Geo]

Hi guys. I just wanna say that you just got another freshman on coledge. I hope that I aint gonna bug you around real hard with very stupid things like someones in the past- maybe just a bit less. :-) Well I was here on this forum for a couple days, read several pages and as reading your posts something snap in my head: I must join these guys in building Tesoro, and stop looking it from side.
Yesterday i built a pcb in a few hours, but cant get all of the components at once. So, its gonna be a loooong week.

ONCE AGAIN HI TO EVERYBODY IN HERE!!!

I have 1 question, anybody: is there a diference betwen using BF245c and J107, and what is it?
Pozdrav za sve nase!

Yes. At cut-off voltage. Use for better BF245A or B. I used at TGS all the fets without any difference(generally), but i think that in fine tuning the BF245B will work better.

[Geo]

Hi Ivica.
How is the weather at Beograd?????
Regards

[Max]

Hi guys. I just wanna say that you just got another freshman on coledge. I hope that I aint gonna bug you around real hard with very stupid things like someones in the past- maybe just a bit less. :-) Well I was here on this forum for a couple days, read several pages and as reading your posts something snap in my head: I must join these guys in building Tesoro, and stop looking it from side.
Yesterday i built a pcb in a few hours, but cant get all of the components at once. So, its gonna be a loooong week.

ONCE AGAIN HI TO EVERYBODY IN HERE!!!

I have 1 question, anybody: is there a diference betwen using BF245c and J107, and what is it?
Pozdrav za sve nase!

Hi,
don't know about J107 but BF245 a,b and also c are good for TGS... then you can use also other fets too. As Geo stated they could have different cutoff voltage and there is about all the difference from one to another cause other stuff like Rds resistance is always low in signal type fets so 100 or 50ohm don't make great differences on these designs. On TGS this is also more true cause circuit is not critical at all... it will always work also with not original parts but similar.

My only advices about components are on ICs:
try to find LF353 for preamp (or use TL072/TL082 instead if you can't)
try to find LM308s (or use TL071/TL081)
try to find a good dual op. amp low noise instead of TL062 (use LF442 or better some TLC2262)
try to find one LM393AN for last comparator

Other stuff like transistor, diodes, caps etc you can vary as you want about type (not value of course) and circuit will be fine. For best tuning use scope to track signals from start... look for ringing and other noise... try to reduce them.

For coil use Ivconic's data (255x137mm TX=100 RX=105 wire 30AWG)

Best regards,
Max