Pulse IB discriminator (by Sasho - Varna)

[kt315]

"Jelco noted CZ-5 has poor sensitivity..."
I disagree with this! JackD. was my close friend, but we disagree on many points...
CZ5 is very good and very deep. Problem was with damn quartz, easy to brake...Few devices busted same way. Detector was punched on some rock or tree and only component was broken inside was...quartz..
Few of those ended at JD workshop.He tried somehow to replace that quartz without success....Thats why he ended with conclusion those are not sensitive. At the time we argued much about many things...Sort of ego war i suppose...!?
So few months before he died, we stopped talking....I am still sorry....
But facts are facts; CZ5 is one of the best detectors i ever saw in my life!
Especially when used with 8" spider coil - coin killer!

I already had that schematic....sloppy draw, few mistakes....not solving my TGS audio problem....
Still searching....
I am off this forum cose lot of rains and thunders here...Sheeesh!

hi, ivconic. you are so radical! I am also Patriot of Fisher, Tesoro and Garrett!
another question to you. not about the Patriotizm now! can you give more info on jackdetect's detector? have you the schematic?

https://www.geotech1.com/thuntings/a...1&d=1131760228

When I finish my all developer tasks, I will sent like present, couple of my units, probably to Carl or others, which can make objective performance tests, and put it in public.

Zeljko.

[Geto]

I will be glad to test one!

[ivconic]

...

No, sorry, i do not know details about it. JD was kept it in secret...scratched ic labels and simillar....
I had chance to test it in JD backyard... Nice audio, few audio modes....Descent depth...but unstable on mineralized soil, way to much for my taste. JD insisted on large coil...50cm !!!??? Maybe that coil was reason for instabillity...
Later one of his customer reported also bad results on mineralized terrains...
Dont know what to say?
It was sort of "mixture" between few Fisher models, but mostly on CZ5 (some stages)...
JD just finished it when we met for the last time.. I spend few hours at his place, playing with his detector and that is all...The rest of story you know..

I wouldnt "push" Tesoro Golden Sabre project so persistent, if do know some better for homemade....
After 20-30 various projects, finally there is TGS which suits all my expectations....
These days i am only interested on audio mod for it. Do not want to bug myself with another VLF any more...
Regards!

[Max]

No, sorry, i do not know details about it. JD was kept it in secret...scratched ic labels and simillar....
I had chance to test it in JD backyard... Nice audio, few audio modes....Descent depth...but unstable on mineralized soil, way to much for my taste. JD insisted on large coil...50cm !!!??? Maybe that coil was reason for instabillity...
Later one of his customer reported also bad results on mineralized terrains...
Dont know what to say?
It was sort of "mixture" between few Fisher models, but mostly on CZ5 (some stages)...
JD just finished it when we met for the last time.. I spend few hours at his place, playing with his detector and that is all...The rest of story you know..

I wouldnt "push" Tesoro Golden Sabre project so persistent, if do know some better for homemade....
After 20-30 various projects, finally there is TGS which suits all my expectations....
These days i am only interested on audio mod for it. Do not want to bug myself with another VLF any more...
Regards!

Hi ivconic,
I think too there is room for improvements on GSabre, expecially audio.
I was thinking at a simple audio power amplifier cause VCO gives me no e.g. disc informations like in other VLF, but just strenght of signal, like in PI detectors.

I think that CZ5's audio is too complex to be integrated in a "simple" detector like GSabre is. If required you need to redesign e.g. sampler to keep syncro with VCO, so there are also presets in CZ5... : too complex for the already made GSabre. Need new (and more complex) schematic to do that.

BTW do you think that GSabre could beat in depth also CZ5 with same diameter coil ?
I'm puzzled about that cause of special spider coil GS haven't and cause of mosfet,
much powerful tx stage of CZ5.

For GS, easy solution idea:

I was thinking at TBA820M. What do you think about a straight audio amp. instead of the C517 stage ?

BTW detector is really stable and reliable, I'm using DD22 and now is just a few cms under bandidoII as depth in air. I think I could improve also depth changing preamp and varing rx cap.

Kind regards,
Max

[ivconic]

.

I am not sure it will work? Audio buffer at TGS - LM358 across that 27K is "pulling" some voltage in range -4.xx to +3.xx volts..if i measured correctly?
On my previous mod with LM566 i had to put extra fet J107 to trigg it to -12v...it showed as only way to make LM566 stage to work good. Direct connection gave a lot of saturation and various "squeeking" with noise...
Either some level converter should be applied before ordinary audio amp...?
I have rough idea on my mind,only dont have it as schematic yet. It seems it only few fets more can solve the problem. I am thinking to experiment with small capacitances arround gate and source to make some "delay".....we will see..
CZ5...? Ehm,at the time i was very impressed with it...Now my TGS runs deeper...Yet, i idore CZ sound!
Regards!

P.S.

Max, question for you;
right now i am making some guitar preamp, it is finished and working good.Next step is distortion. I made Shred Master from Marshall. It is working but...sound is much attenuated when Shred is ON. When switched OFF sound retreives at normal level???
Yes, i know that there must be some attenuation, since signal always have some losts when put through some filter (dist.) but this one has big lost???
I rechecked all, schematic, elements....All seems to be normal.
Maybe i used wrong type of capacitors??? I used ordinary, first i had handy..
Any experiences?

[tiktak]

HI,

Hi,
Ivconic.
I can find NE566N(NSC)is this the same IC as LM566N?
Can I use to modify TGS sound?
Thanks
And what is the depth of this coil?For 1 euro coin in air?DD28 for TGS?

[ivconic]

Yes, those are same.
I posted schematic of mod in TGS thread.
Depth....already posted all my results there...
Read!

[Geo]

Hi ivconic,

BTW do you think that GSabre could beat in depth also CZ5 with same diameter coil ?
I'm puzzled about that cause of special spider coil GS haven't and cause of mosfet,
much powerful tx stage of CZ5.


Kind regards,
Max

Hi Max.
CZ5 is a better detector. No GSabre could not beat in depth the CZ5.
As i wrote a previous time Tesoro build simple , good and stable detectors with Medium depth, so if you want something better in depth you must construct something else.
Regards

[Ultimate_Haze]

Hi

like?

[Max]

I am not sure it will work? Audio buffer at TGS - LM358 across that 27K is "pulling" some voltage in range -4.xx to +3.xx volts..if i measured correctly?
On my previous mod with LM566 i had to put extra fet J107 to trigg it to -12v...it showed as only way to make LM566 stage to work good. Direct connection gave a lot of saturation and various "squeeking" with noise...
Either some level converter should be applied before ordinary audio amp...?
I have rough idea on my mind,only dont have it as schematic yet. It seems it only few fets more can solve the problem. I am thinking to experiment with small capacitances arround gate and source to make some "delay".....we will see..
CZ5...? Ehm,at the time i was very impressed with it...Now my TGS runs deeper...Yet, i idore CZ sound!
Regards!

P.S.

Max, question for you;
right now i am making some guitar preamp, it is finished and working good.Next step is distortion. I made Shred Master from Marshall. It is working but...sound is much attenuated when Shred is ON. When switched OFF sound retreives at normal level???
Yes, i know that there must be some attenuation, since signal always have some losts when put through some filter (dist.) but this one has big lost???
I rechecked all, schematic, elements....All seems to be normal.
Maybe i used wrong type of capacitors??? I used ordinary, first i had handy..
Any experiences?

Hi,
about the marshall effect I have no direct experience with it, but think you could have a bad component value.

Saw many times this stuff, very common some years ago, but never opened one.

Yes there's always some attenuation but if is too hi there's something wrong in the circuit.

Anyway, that's the schematic I've found.
It's the same you have ?

Kind regards,
Max

[ivconic]

Latos!

"CZ5 is a better detector. No GSabre could not beat in depth the CZ5."
Geo, my friend you are wrong! TGS Light is superior over CZ5 and CZ7....
Maybe this looks funny but it is fact!
Yes CZ5 is state of the art looking on tech involved and highest professional level of manufacturing but if we talk about depth on single coin - than TGS with home made coil is superior. Trust me, i do not want to lie to you.
I suggest you to make it and see yourself. You will be delited!
I had 1266, also i had CZ5 in 2002. I am fully awared of performances of both machines....CZ5 is unneccessary complicated....yet high tech for sure!


Yes Max, i did my dist. according to that schematic....It si working but not good....

Regards!

[ivconic]

Souvenir...

I still have photos of it...as souvenir! Looking at those suddenly become sad...!

[kt315]

Ivconic, I keep a bunch of good quality photos of CZ-5's PCB. if you need...
I had seen it inside... because I did take fix out CZ-5...

yours

[Geo]

Entaxsi File

"CZ5 is a better detector. No GSabre could not beat in depth the CZ5."
Geo, my friend you are wrong! TGS Light is superior over CZ5 and CZ7....
Maybe this looks funny but it is fact!
Yes CZ5 is state of the art looking on tech involved and highest professional level of manufacturing but if we talk about depth on single coin - than TGS with home made coil is superior. Trust me, i do not want to lie to you.
I suggest you to make it and see yourself. You will be delited!
I had 1266, also i had CZ5 in 2002. I am fully awared of performances of both machines....CZ5 is unneccessary complicated....yet high tech for sure!


Yes Max, i did my dist. according to that schematic....It si working but not good....

Regards!

Hi Ivica .
I wish you are well
What i can say !!!!
Now i am very busy but when i will find free time i will give a try to the TGS. For me until now the best detector (most sensitive) is the Anker SS60. If TGS will be a bit sensitive than CL3 i will let the CL3 and i will put one TGS inside the box. If the things are as you say then there is not reason to construct other detectors. Only two... SS60 and TGS. Ohh my god .... what i will do at my free time ?????
My best regards

ps I am a litle negative with these detectors because they have 90% the same circuit with the same gain so i believe that they are about the same .... about .... about ...... about. ..... he...he

[ivconic]

KT315 i have to much photos....whenerver i see photo of some detector i had and later sold, feel sad about it....My finances not allowed me to keep them all. Last few years very hard living here, so i had to sell many of them to collect money for everyday things - to survive! So i rather skip viewing those photos oftenly....

Geo, on first look all Tesoro's are same...that's what i thought also...But they are not! I made Silver Sabre and Golden Sabre....Not same, not even close!
Golden Sabre is much better...Machine itself is very well optimized, but main secret is in coil used with it...If you put some effort may gain better results with home made coil than with original...
Anker...? I have schematic but never tested it...have sort of aversion to that type of designs...dont know why, but just dont like to many power in TX.
I like calm and silent detectors - to produce sound inly when item is detected for real. Dont like noisy detectors. That's why Minelab is "Master"...although imanaged to beat even Minelab with my TGS...
Maybe i am wrong...dont know. Why dont you perform some field tests with Anker and post here? But field test mean you have to bury coin(cover with soil) and than try to locate it as deeper as possible WITHOUT FALSE SIGNALS AT ALL...Please do that with few coins and later report here....just for comparsion...Would you?
Take 2cm nickel coin,bury it at 30cm depth and try do detect it with Anker...
If Anker can detect it without one false signal and with 24cm coil...than it is good as TGS or even better! If not....than forget Anker and make TGS...
TGS is my favorite mostly cose it is very stabile on ground...no false signals at all. From time to time i have to check if it is turned ON???! Cose walking 100-200 meters through some forest without a "beep" sometimes confuses me....Simply; no item - no sound! Unlike "singing" CL3..
Again,please do some real tests outdoor and report here...
Best regards!