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#304
09-10-2007, 11:24 AM
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Hi Esteban
Can you tell me if there is an electric connection between the handle and the circuit of your "pistol" and if you use 3 X 9V battery as Mineoro? I have realized a TR-IB at 30 Khz, with Sync-demod.- push button retune - CC amp - and the receive coil is followed by very high impedance amplifier with Fet in bootstrap configuration. The first test out my home is negative (no gold in my garden...) but signal is very stable. 
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#305
09-10-2007, 11:26 AM
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#306
09-10-2007, 02:18 PM
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Hi FrancoItaly
There is not connection in handle, for example no to negative lead. I can obtain minimal variation of hz in the coil since 55 to 60 Khz. I think your find indicator is the vumeter, but this is insensitive to low changes. You need an audible indicator, you can put in limit the beeps with the sensibility potentiometer. No speaker, yes a piezo buzzer. With 59 Khz oscillator I found gold Navy button (in the first search) and some coins, but at this frequency the movement of pistol in hand must be some slowly. I try all my experiments in house and sites with good quantities of relics.
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#307
09-10-2007, 05:06 PM
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Hi Esteban
I thank you for help, in my instrument I measure a phase change in the receive coil respect the transmitter oscillator and I have also an acustic beep by a piezo buzzer.
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#308
09-11-2007, 05:39 AM
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Hi FrancoItaly.
Can you explain me why you have put the white grid in the center and the front place of the coil? If i see good at the center is there a small coil vertical with the big one?? Regards 
__________________
Geo
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#309
09-11-2007, 08:24 AM
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Hi Geo
the white grid is the antenna connected to the small receive coil that it's orizontal and this forms a TR-IB with the big vertical coil. I think (or perhaps I hope) that the magnetic field of the transmitting coil it can influence the ionic or electric existing field. Also a small pertubation it can be sensed as a change in phase in the signal amplified in the receive coil. The screen acts as a virtual ground and it's shields the body. My instrument is a free interpretation of Esteban's pistol... Best regards
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#310
09-11-2007, 09:26 PM
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Hi FrancoItaly
.Thanks for your info, but i believe that it is better to play with am de-modulator than with phase shift. For me the problem with pistols type LRL is how to discriminate the gold and not how to locate from long distance. My Regards
__________________
Geo
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#311
09-12-2007, 06:51 AM
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Hi Geo
I rectify, I use a syncr. demodulator equal to VLF metal detectors. For me the problem is also to locate any metal from long distance. Best Regards
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#312
09-12-2007, 01:39 PM
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Quote:
short range detection is the problem of metal detecting from origins. The real problem is that the "solutions" like zahori-circuits can't give any help to locate metals! So you can use a magnetometer for iron stuff... but there's nothing to detect e.g. a gold ring from 10meters or 1mile. Are all fantasies and dreams, or stories (and often even frauds).  That's the absolute (and sad) truth. Best regards, Max
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#313
09-12-2007, 04:36 PM
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Hi all
.I wrote before some time that i have tried the Andreas dillinger and it works from long distance. Also i saw the Vertex to locate gold coin from 300m up on the ground, not inside the ground. So i do not accept   you to say me that they do not work "Are all fantasies and dreams, or stories (and often even frauds)". I accept that they have a lot of other problems of reliability but they can locate from long distance.Except if some people of you wants to write here again the same  and same things. If so OK .... we will stop to write here and Carl can delete the remote sensing (there is not other reason to be here).Or Delete us Bye
__________________
Geo
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#314
09-12-2007, 04:53 PM
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Quote:
it's my opinion, you can have your opinion different from mine. Not the point. I said that cause I've seen many different bought units (different models/brand) on the field, in action, of friends and other people I know: no just one of these were capable of find anything. All re-sold them very quikly cause of the bad feelings related to the fact no target were found with those...total waste of time and money. I, myself, built the zahori circuit with my hands, tested and found absolutely nothing in places where with metal detectors I found after ancient, long time buried metal objects. Not only: circuit doesn't detect water flows too ! And was claimed do that.What must I think of all these things now ? That they work !? Your experience could be different from mine... ok... why not ? Then I'd like to see these Andreas or whatever manfacturer unit be tested in a scientific way, like in the challenge... and win in front of a TV camera. Personal impressions are good to take personal conclusions... but just public demonstration can solve any dubt on the topic. Untill that I'm free to say: Are all fantasies and dreams, or stories (and often even frauds). Best regards, Max
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#315
09-12-2007, 05:09 PM
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Geo, you're right.
Or Carl open an exclusive thread for real discussion with real rules without any type of insults or criticism against the work of others. If somebody failed at first time in make operable an electronic LRL, this is not reason for to discredite. Also I build several MD doesn't work, and maybe the error was mine, maybe not, etc. Also I failed 1,000 times in build operable electronic LRL, and know several ways that it work. Regards Esteban
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#316
09-12-2007, 05:29 PM
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Quote:
oh yeah... it's me. And Ivconic ? too ? And Michael ? eh ? Are we all stupid and you are the master of electronics !? The circuit doesn't work. Doesn't detect water flows and doesn't detect metals, dear Esteban. It's a fact... not my electronic incompetence as you wanna guess by your pretentious post. I've made a huge number of circuits/designs/PCB and I've experience of electronics many times what you'll ever understand... from your garage in Paraguay. And bought units too, don't work. I've seen them in "action"... the random noise I mean. Shame on you... storyteller ! Best regards, Max
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#317
09-13-2007, 02:57 AM
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Hi,
oh yeah... it's me. And Ivconic ? too ? And Michael ? eh ? I don't know if Ivconic failed, for example, but he is a happy seller of these. Diplomas hanging on the wall no means you can build it, if you don't know the mechanism. Yes, I'm story teller, because I have much history in it, so you hate me causes it, you have not register an only coin find, and also you don't finish yet your TGS coil.Yes, my PCBs are uglies, but I don't feel shane when I show these. Show me the soldering side of your TGS, if fine I'll congratulate you! Yes! Sure! Ugly or not ugly, sthetic is not guarantee of good working device! Dr. House, you're not original because centuries before a man called Molière wrote a comedy regarding a doctor wich cure with stick! Very original your idol and the creators! Don't worry, in any moment I'll post the New Zahori for to play with it. Also, maybe you can $tart a small bu$ine$$ with it. Here my "garage" and other things. As you can see, I have a poor labo, but you don't need more. Regards Esteban
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#318
09-13-2007, 05:27 AM
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Quote:
__________________
Geo
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#320
09-13-2007, 07:54 AM
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Quote:
yes, me , Ivconic and Michael "failed" with that circuit. Or better say that we didn't any mistake... just circuit doesn't work as claimed. I've already tgs coils made (from bandido, are the same), have also original 9x8 (bought) and make others and I don't need to show to prove anything. The fact you have hundreds of PCBs doesn't mean you fully understand what are you doing... and as you say "diploma" hanged on the wall it's a proof that you aren't just an homebrewer electronics but a person with hi-education. Many people could take the soldering iron and copy pcbs from magazines, but without understanding what they are doing. Monkey job. "Ugly or not ugly, sthetic is not guarantee of good working device!" ??? Cannot understand what you mean ^ "sthetic": maybe exterior of pcb ? Of course exterior appearence of PCB is not a guarantee of working, but is a proof that at least construction follow right rules e.g. about flux removal, that is very important everywhere there is hi-amplification, like in this circuit. Also soldering joints are important cause bad soldering work will result in faults in the circuit working. "Don't worry, in any moment I'll post the New Zahori for to play with it. Also, maybe you can $tart a small bu$ine$$ with it. "I'm not interested in any business related to TH. "Here my "garage" and other things. As you can see, I have a poor labo, but you don't need more." Poor doesn't mean not functional if you can tune things good, even with poor or old tools/instruments that is good. Problem is that circuit doesn't work for detect water flows or metals. It's a fact. Also with a Nasa/JPL lab you'll fail in the mission of detecting water flows or metals with it. Circuit have no meaning for LRL if you exclude LRL of AC noise. Best regards, Max
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#321
09-13-2007, 02:47 PM
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No, Ivconic don’t failed, he is a happy seller.
Max, but I don't understand, so, what a person with your high-grade knowledge replicate the Zahori with the fix idea that it work??? Many people could take the soldering iron and copy pcbs from magazines, but without understanding what they are doing. Monkey job. With this perspective, to replicate commercial detectors is monkey job too. ... about flux removal Yes, also in my ugly old Zahori's PCB the flux was removal. This was only a prototype. But also is important to build in fiberglass. In common PCBs there is fugue of current in order of 150 pA, fatal for high impedance ICs. Problem is that circuit doesn't work for detect water flows or metals. It's a fact. I never sustain the idea for to find water, for example, is in the original text. This was the reason of the mods. Michael had insistent beeps near a big rock, but he can't check why beeps nearby the rock. If you don't check, you never will be sure. The use of Zahori and the major part of electronic LRL stay in a point between the stability and the false signal. If you don't adjust in delicate point, you never will find metal with it. Michael wrote: Only in one place (very near a big stone) we had suspicious beeps for every time and from every side we had a different singnal there. may be was from under the stone. here was the place we had searched it befor by our PI but had no signal . Also Ivconic obtain some beeps in some places. If you don't be sure, check around the area with your MD. If your metal detector can't achieve the item causes the depth, found the origin of the beeps in the area and excavate and take your conclussion. Also don't know wich version of the posted on thread you built. The first posting article was a reference, the original article. This doesn't work properly for metal, for example. No complicate version with switches. No connection pin 9 of the 4066 to negative lead. Also I isolate the antennas of the box with fiberglass PCB pieces. You can use teflon too. No plastic box, yes wood, don't know performance in metal box. Regards Esteban
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#322
02-21-2009, 09:37 AM
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Quote:
Hi Nihil Roma Maius , Please post this video link again.
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Linear Mode
