What similarity ?, what differences ?

[aft_72005]

Hi ,
My question from LRL mans
What similarity and what differences is between metal detector
And LRL or pistol detector ?
Best regards.

[aft_72005]

Hi ,
My question from LRL mans
What similarity and what differences is between metal detector
And LRL or pistol detector ?
Best regards.

Without reply !!!!!!????

[J_Player]

Without reply !!!!!!????Maybe LRL experts do not know what the differences are. ?

From the perspective of a person who understands metal detector theory and LRL theories, I can explain what appears to be the diffrerence in theories and maybe operation between LRLs and metal detectors. Maybe an LRL expert who knows the answers can find some errors in my perspective and explain how it really works.

To begin, there are many kinds of LRLs:
A. Dowsing and electronically enhanced dowsing types.
B. Active coil types that broadcast an alternating signal that may be detected by any number of means.
C. Passive electronic types that listen for signals similar to a radio receiver with no transmitter.
D. Hybrid types that use a modified metal detector of some sort combined with "strange" circuitry that is not well explained.

There are many variations of these kinds of LRLs with overlapping between the classifications.
Variations can include using any of the following TX and RX methods:
1. Coils tuned to ELF, VLF and any other RF frequency into the microwave region (most often VLF).
2. Ariel antennas operating at anywhere between ELF to microwave.
3. LEDs, Lasers for TX of a beam to stimulate different areas of ground to be scanned, and coils to detect the response from the ground.
4. Broadcast band receivers used in passive mode or in conjunction with low power transmitters.
5. Electrostatic electronic sensors.
6. Dowsing rods with electronics added, such as low power signal generators connected to the rods or to the ground, or broadcasting in the air.
7. Dowsing rods with samples, magnets or "power loads" added to somehow influence the effectiveness of the rods.

Of all the kinds of LRLs I listed, the most similar to a metal detector is the TX/RX coil style pistol detector.
What is different?

Metal detector theory
Metal detector theory requires the TX coil to produce eddy currents in a target metal that can be detected in a receiver circuit. This depends on using a sensitive circuit and coil that can pick up the eddy currents, and hopefully examine the kind of eddy current to help determine what kind of metal is detected. Metal detectors are limited by the range of the magnetic field that can be transmitted as well as the range of the magnetic field of eddy currents. When the RX circuits are turned up to a high enough gain for maximum range, the problem becomes electronic noise from the internal circuits. If the circuits are optimized for minimal noise, then the second problem of external noise will become prominent --- noise from power lines, EMI, RF in the air, and even noises from the ground due to variations in earth currents interacting with mineralization in the soil. In order to avoid this kind of interference, most detectors have a faraday shield and ground balance circuits to "de-sensitize" the electronics so it will find signals that are not buried in the noise. The remaining signal is focused on the magnetic field with the electric field removed.

PD theory
If we compare a simple TX/RX coil type PD LRL to a metal detector, the first difference is there is no Faraday shield. The PD is also equipped with adjustments that allow it to be tuned much deeper into the noise region, and in some cases beyond stable circuit operation. We hear the experts of LRLs tell how it is necessary to move very slowly and hold the PD steady out in front pointed below the horizon, as well as not to wear clothing that collects static. It would seem they are trying to detect a signal at the extreme sensitivity adjustment, where any user movements could cause false signals. In fact, I expect this sort of detection to pick up a lot of EMI/RF and other interference noise from the air. The signals they are looking to find are not eddy current signals. For a VLF coil to receive a signal more than a meter or so, it must be operating as a radio receiver looking for variations in the broadcast signal. Without a Faraday shield, the electric field is not inhibited, so full RF TX and RX are possible. Possibly the amount of RF that is absorbed in the soil changes, and the diffraction of RF can be sensed. Or maybe there are RF reflections when a target is in range. According to some of the LRL experimenters, there is a hot spot in the location of long time buried metals that interacts with the signal they receive. It is unclear whether this signal must be transmitted, or if it exists separately from a transmitter, and can be detected with a simple passive receiver.


So far I described the theoretical difference between only one kind of LRL and a metal detector. There are many other kinds of LRLs.

The common difference LRLs all have from a metal detector can be summarized as follows:
1. They are claimed to detect metals at long distance using methods that cannot be demonstrated to be working live in front of skeptical witnesses.
2. Most LRLs require long-time buried metals in order to work. LRL experts claim they detect a secondary phenomenon that develops after metal has been buried a long time. But what secondary phenomenon they claim to detect has never been explained in a manner that can be demonstrated or duplicated. Usually the method of operation claimed can be shown to be untrue with simple instruments.
3. Anyone with electronics and construction skills can build a metal detector that works. Nobody can build an LRL that works except a very few people who do not demonstrate the LRL working in front of skeptical witnesses*. The idea that their LRL works exists only in their stories, not in the experience of most people who read their stories.
4. All LRLs seem to require special methods or skills to use them successfully. From dowsing to electronic coil LRLs, there are special instructions that must be followed before any chance of detecting can happen. Also the "environmental conditions" must be favourable in order for them to work. These requirements seem to work to compliment the fact that LRLs cannot be demonstrated in front of skeptical witnesses. These requirements also work to compliment the fact that nobody can build an LRL except the very few people who say they can, but do not demonstrate them working.

Those are some differences between metal detectors and LRLs that I have observed from a technical perspective.
Are there any LRL builders or users that see some errors in my observations, or know some more differences?

Best wishes,
J_P

* Exception: Morgan and Geo demonstrated LRLs they built to other forum member (not completely skeptical). Maybe there are a few others who also did?

[Gwil]

(1) Metal detectors operate on well established scientific principles.

(2) LRLs apparently operate on theories that do not appear in any textbook and that would be worth several Nobel prizes if they could be proved correct.

Perhaps one day those Nobel prizes will be awarded. But I have my doubts.

Gwil

[J_Player]

(1) Metal detectors operate on well established scientific principles.

(2) LRLs apparently operate on theories that do not appear in any textbook and that would be worth several Nobel prizes if they could be proved correct.

Perhaps one day those Nobel prizes will be awarded. But I have my doubts.

GwilI agree,
Nobel Prizes are awarded to people who demonstrate they have made a great accomplishment.
If it is not demonstrated to be correct to the Nobel Prize committee, then there will be no prize.

Best wishes,
J_P

[detectoman]

hello aft, the lrl difference is; these lrl are put in reception limits, are dm extremely hot"
but whit special support
md have little radio of magnetic irradiation
lrl extended these radio of propagation and reception in waves multiples' armonic
i see, esteban can give you exact detail
i never tried my probable wrongs stuff lrls
im entusiast hobbyst
i am teoric builder, but when i sure any lrl of me is experiment superior, and my buried coins already, i go try all these extrange cacharros

[aft_72005]

Possibly the amount of RF that is absorbed in the soil changes

Hi J_Player :)


Are you know about absorption type PD ? and what happened when this PD
Seeing targets ?

Best regards

[aft_72005]

Hi detectiman, :)
Always theory base of practical design , but , important is specially correct
Data .
Best regards.

[J_Player]

Hi J_Player :)


Are you know about absorption type PD ? and what happened when this PD
Seeing targets ?

Best regardsHi aft,
Absorption type does not exist. This is only a word that Esteban chose to describe a low impedance passive coil detector that responds to noise and the alledged "phenomenon". It has never been demonstrated that there are any emissions, or that these passive coils are absorbing anything. The description of the response would suggest the coil and amplifier develop a signal when pointed in the direction of long range buried metals. Nothing more. According to Esteban, he concluded the coil is absorbing emissions from the "phenomenon" area of the ground near long-time buried metals.

Here are some references to show the origin of the terminology "absorptive detector":

Esteban explains the ways to detect the "phenomenon" produced by long-time buried metals: http://www.geotech1.com/forums/showpost.php?p=40681&postcount=81
No only gold (buried for many years) produces electrical changes in the vecinity of an electrode (Mineoro's electrode, in this case). Here occurs a disbalance of charges.
Also, the ELECTRICAL variation in a site with buried metal is detectable by a simple FM radio.
You can detect via this methods:
1. radio
2. coil (oscillator)
3. infrared
4. magnetic absorption
5. microvoltmeter
5. association between 2 or 3 the above
Continuous detection (reproducible in the air) maybe is not possible yet, because the involved phenomenon depends of the electrical field produced by the long time buried metals.

Esteban describes how absorption is accomplished with a ferrite in the pistol detector, while the metal detector part is for pinpointing at close range: http://www.geotech1.com/forums/showpost.php?p=79564&postcount=20
Pistol detector based on regular detector works as long range detector (some meters) and is possible in conjunction with other(s) circuit(s).
Morgan has success finding targets with it, I have success with similar instrument... so maybe the problem is errors in schematics or connections.
The ferrite section is the real long range detector in this project.

Pistols with MD can be:
1. Based in regular MD + RF circuit
2. Absorption as the ferrite, in wich case MD is for pinpointing unburied target.
And more and more combinations. Conclusion: an unexploded field with infinite possibilities.

Esteban explains why he calls the magnetic/electric detection "absorption" rather than response to an anomaly: http://www.geotech1.com/forums/showpost.php?p=90424&postcount=127
J_P: From what you have posted, it appears that your machine is only showing different "beeping responses" when the target is removed, which has convinced you that your machine is absorbing emissions. However, I am not convinced. I do not believe there are any emissions from the "phenomenon" area except an increase in radionuclides for long time buried metals. And it also seems that your machine is not capable of counting radionuclides. Therefore, I speculate that you are detecting an anomaly of some sort, -- not emissions.
Esteban: I use "emission" because some very sensitive instrument that enlarge a short pulse 100,000,000 times show the target in wide angle, so is difficult to centrate due the anomaly. But the anomaly only is detectable or better detectable when target is buried for many years and near surface, 10-30 cm. When small target is very deeply maybe you obtain few detection or only a beep, except if the mass is a treasure.
I use "absorption" because I consider that a loop with a toroid can absorb some magnetic-electric anomaly around such targets

Esteban shows photos of a classic "absorption" ferrite sensor in an experimental LRL: http://www.geotech1.com/forums/showpost.php?p=81896&postcount=1

Esteban describes absorption of "phenomenon" with experimental magnetic device detected bronze that Mineoro could not find: http://www.geotech1.com/forums/showpost.php?p=40687&postcount=86

Esteban explains how absorption works to detect local magnetic and electric field using the pistol detector: http://www.geotech1.com/forums/showpost.php?p=57232&postcount=22
Qiaozhi: Are you attempting to detect differences in the local magnetic field or the electric field?
Esteban: The both. Devices based in magnetics (passive type, absorption mode) must be low impedance loop/low resistence coil for to no catch interferences and detect only non ferrous, but have not much distance, only few meters. Except based in magnetics type MD coils (active). Based in this same type but with many turns coil catch ferrous...
But based on electric field go more far (antenna, microvoltmeter type).
Qiaozhi: But your detector is a handheld pistol-type. How can this detect a potential difference in ths soil? Or is this using a different technique?
Esteban: Because, is the form for this kind of detector, is not equal in form that regular MD, except if there are an IB detector coil attached in a box with handle. Just this is the job of the electronic LRL: to detect the difference in the soil, and his more sensitive since you don't approach in the soil, so is free of effect soil and capacitance.

Esteban tells distances of detection when using different LRLs: http://www.geotech1.com/forums/showpost.php?p=55289&postcount=51
IR (infrared) + FM radio = 7 m in distance, depth for coin max. 50-70 cm.
Absorptive can catch 20 m or a little more, but depth is other theme. I think treasure at more 4 m depth can't be detectable at this distance (30 m), but in vecinity yes.

http://www.geotech1.com/forums/showpost.php?p=70576&postcount=4 IR + FM radio + magnetic absorption antenna = 25 m


============
The concept of "absorption" means a low impedance coil usually on a ferrite is connected to a receiver/amplifier with an RF detector circuit, similar to an AM radio receiver. Whatever signal is received is passed through a threshold detector and made to beep when it becomes stronger than the threshold setting. This is called "absorptive detection".

Best wishes,
J_P

[Esteban]

New antenna born! Here is important the position of secondary core wich takes the "info" from loop-primary coil-ferrite. System no patented yet? Who knows? :rolleyes: Have others... Of course, coil (loop) can be aluminium round, square, rectangular. I'll post photo soon...

[WM6]

New antenna born! Here is important the position of secondary core wich takes the "info" from loop-primary coil-ferrite. System no patented yet? Who knows? :rolleyes: Have others... Of course, coil (loop) can be aluminium round, square, rectangular. I'll post photo soon...

Hi Esteban

I dont know if it was patented exactly as you draw, but it was used many times in different schematics as air TR coupled., ferrite rod TR coupled, or ferrite pot transformer coupled.

[Esteban]

Hi Esteban

I dont know if it was patented exactly as you draw, but it was used many times in different schematics as air TR coupled., ferrite rod TR coupled, or ferrite pot transformer coupled.

Hi WM6.

Note that here the difference is the core with possibility to adjust into a X point in the ferrite bar. Here elements, no yet assembly.

[Esteban]

In this other method, antenna only acts as "guide" of signal. A movable core is positioned in best point according "phenomenon caused by gold signal".

[WM6]

Hi WM6.

Note that here the difference is the core with possibility to adjust into a X point in the ferrite bar. Here elements, no yet assembly.



Yes, Esteban, by using ferrite bar tunning of such antenna can be more comfortable for our lab conditions.

What dimension of ferrite rod you use?

[Esteban]

Yes, Esteban, by using ferrite bar tunning of such antenna can be more comfortable for our lab conditions.

What dimension of ferrite rod you use?

The more large I have in this moment: 18 cm long, 1 cm diameter.

[hung]

Hi Esteban,

Is the toroid in the picture the one I sent you?

Tengo algunas noticias, pero enviará un correo electrônico más tarde con más tiempo.

[detectoman]

thanks esteban for this new idea, i am working in things how these, want an pd less complex, i am simplified the tx and rx circuits whit ics, for handed most confortable, i think square coil is most powerfull then round, or ferrite, i see ferrite need best alineation n-s, for detection on cardial position, i think coil is major direcctional no need precise exact cardinal lines handed, i see lrl is almost simple, but extreme dificultous is put to point for large reception this clave
ivconic detect 30 cms coin in air whit vanguardist tgsl, but make whit excesive circuits, morgan obtain 50 cms gold ring, whit simple 30 basic transistor circuit, too discriminate, what is superior science?
md is an cience of enginer ic know steps, mosfet, jfet ics, extreme amplifications, lrl is an experimental science circuit of modificacion by entusiast, is simply hot
the modes lrl is detection of future, too md modern g p radar is very empiric, due need be operation near of soil, carry whit tires, then rased superfice, gpr isnt lrl, is only imaging coloread lines reception, we need an lrl whit vision monitor, may be and modified old camera can begin, whit circuits support tipe esteban
md are very complex, lrl is simple but unknow, same discriminate
i think is possible an lrl vision very basic, magnetized the input, simplify the stuff, whit inovations how you show today, an embrace to all

[detectoman]

i see in useds market heavy old cameras rca, in 10 dollars these is for collection, big size big bateries, hig consume, i have an medium old camera panasonic whit monitor , but proxime experimentation on this, is other story, so i'm advocated to simple lr

[Esteban]

Hi Esteban,

Is the toroid in the picture the one I sent you?

Tengo algunas noticias, pero enviará un correo electrônico más tarde con más tiempo.

No, but I winding the toroid you sent me for some experiment with telescopic antenna.

Espero el correo. Gracias.

Esteban

[Esteban]

thanks esteban for this new idea, i am working in things how these, want an pd less complex, i am simplified the tx and rx circuits whit ics, for handed most confortable, i think square coil is most powerfull then round, or ferrite, i see ferrite need best alineation n-s, for detection on cardial position, i think coil is major direcctional no need precise exact cardinal lines handed, i see lrl is almost simple, but extreme dificultous is put to point for large reception this clave
ivconic detect 30 cms coin in air whit vanguardist tgsl, but make whit excesive circuits, morgan obtain 50 cms gold ring, whit simple 30 basic transistor circuit, too discriminate, what is superior science?
md is an cience of enginer ic know steps, mosfet, jfet ics, extreme amplifications, lrl is an experimental science circuit of modificacion by entusiast, is simply hot
the modes lrl is detection of future, too md modern g p radar is very empiric, due need be operation near of soil, carry whit tires, then rased superfice, gpr isnt lrl, is only imaging coloread lines reception, we need an lrl whit vision monitor, may be and modified old camera can begin, whit circuits support tipe esteban
md are very complex, lrl is simple but unknow, same discriminate
i think is possible an lrl vision very basic, magnetized the input, simplify the stuff, whit inovations how you show today, an embrace to all

Hi Detectoman. Thanks.

I expect with this system more selectivity, due copper and bronze is difficult to eliminate! :lol:

[FrancoItaly]

Hi Detectoman
I agree with you, it's necessary to build various prototypes with great amplification, we must follow the indications of Esteban, we must observe carefully all the printed boards and schematics that are in the forum and above all we must believe in Lrl phenomenon...

Best Regards

[Mike(Mont)]

Esteban, I guess it depends on which frequency you are using, but if it is the audio freq, you can use an AM radio set to the lowest frequency and see how good of a signal you are transmitting. You might be able to check for leaks, also.

[Esteban]

Esteban, I guess it depends on which frequency you are using, but if it is the audio freq, you can use an AM radio set to the lowest frequency and see how good of a signal you are transmitting. You might be able to check for leaks, also.

Mike, this is pure reveiver device. You can detect the "phenomenom" with only receiver device. Of course, also you can do the job with tx and rx system, but is more critic the adjustment and stability.

[WesP]

Hi Detectoman
I agree with you, it's necessary to build various prototypes with great amplification, we must follow the indications of Esteban, we must observe carefully all the printed boards and schematics that are in the forum and above all we must believe in Lrl phenomenon...

Best Regards

I would say this is the most important part.:D You have to delude yourself into believing the phenomenon exists for it to work.:lol: That's why all us non believes can't get any LRL's to work. We simply can't convince ourselves that any of this suedo(sp)-science is anything more then a fantasy.:)

[Mike(Mont)]

Oops. sorry about that. I keep confusing MFD acronym.

[Esteban]

Oops. sorry about that. I keep confusing MFD acronym.

Yes, Molecular Frequency Discriminator (MFD) and Magnetic Field Detector (MFD).

[Morgan]

Hi Detectoman. Thanks.

I expect with this system more selectivity, due copper and bronze is difficult to eliminate! :lol:


Dont tell this nonsense,also copper and bronze are good to find with LRL !!!

THE PROBLEM IS ALLWAYS REJECTION OF ALUMINIUM

[Morgan]

Hi Detectoman. Thanks.

I expect with this system more selectivity, due copper and bronze is difficult to eliminate! :lol:

Here is possible to find bronze coins more rare than gold,one cent 1922 value 25.000 EURO ;)

[Esteban]

Dont tell this nonsense,also copper and bronze are good to find with LRL !!!

THE PROBLEM IS ALLWAYS REJECTION OF ALUMINIUM

With my first MFD (Magnetic Field Detector) I found one bronze coin with a Nintendo white metal token! (the both in the same place). But a lot of aluminium beer cans doesn't detectable. I found a place where common MD show big signal and I ask people of the house what kind of metalic object can be... they told me aluminium cans of beer. I surrounded the place with the MFD and the cans doesn't detectable. After this test I checked the site of the real detection (some meters of the aluminium beer cans) and found the bronze coin and the Nintendo token...

[Esteban]

Here is possible to find bronze coins more rare than gold,one cent 1922 value 25.000 EURO ;)

In general pistol detector show coins or round form objects better than large objects. Sometimes, the problem are rifle bronze cartridges, but I found that those large objects beeps only one time, but persists on round metalic objects, even with nickel-copper coins.

[Morgan]

In general pistol detector show coins or round form objects better than large objects. Sometimes, the problem are rifle bronze cartridges, but I found that those large objects beeps only one time, but persists on round metalic objects, even with nickel-copper coins.


Here still the problem with some aluminium,you saw the films with Geo...

[Morgan]

In general pistol detector show coins or round form objects better than large objects. Sometimes, the problem are rifle bronze cartridges, but I found that those large objects beeps only one time, but persists on round metalic objects, even with nickel-copper coins.



MFD´s not good for small objects... I know you found jesuitic treasure with MFD,congratulations ;)

[aft_72005]

Maybe LRL experts do not know what the differences are. ?

From the perspective of a person who understands metal detector theory and LRL theories, I can explain what appears to be the diffrerence in theories and maybe operation between LRLs and metal detectors. Maybe an LRL expert who knows the answers can find some errors in my perspective and explain how it really works.

To begin, there are many kinds of LRLs:
A. Dowsing and electronically enhanced dowsing types.
B. Active coil types that broadcast an alternating signal that may be detected by any number of means.
C. Passive electronic types that listen for signals similar to a radio receiver with no transmitter.
D. Hybrid types that use a modified metal detector of some sort combined with "strange" circuitry that is not well explained.

There are many variations of these kinds of LRLs with overlapping between the classifications.
Variations can include using any of the following TX and RX methods:
1. Coils tuned to ELF, VLF and any other RF frequency into the microwave region (most often VLF).
2. Ariel antennas operating at anywhere between ELF to microwave.
3. LEDs, Lasers for TX of a beam to stimulate different areas of ground to be scanned, and coils to detect the response from the ground.
4. Broadcast band receivers used in passive mode or in conjunction with low power transmitters.
5. Electrostatic electronic sensors.
6. Dowsing rods with electronics added, such as low power signal generators connected to the rods or to the ground, or broadcasting in the air.
7. Dowsing rods with samples, magnets or "power loads" added to somehow influence the effectiveness of the rods.

Of all the kinds of LRLs I listed, the most similar to a metal detector is the TX/RX coil style pistol detector.
What is different?

Metal detector theory
Metal detector theory requires the TX coil to produce eddy currents in a target metal that can be detected in a receiver circuit. This depends on using a sensitive circuit and coil that can pick up the eddy currents, and hopefully examine the kind of eddy current to help determine what kind of metal is detected. Metal detectors are limited by the range of the magnetic field that can be transmitted as well as the range of the magnetic field of eddy currents. When the RX circuits are turned up to a high enough gain for maximum range, the problem becomes electronic noise from the internal circuits. If the circuits are optimized for minimal noise, then the second problem of external noise will become prominent --- noise from power lines, EMI, RF in the air, and even noises from the ground due to variations in earth currents interacting with mineralization in the soil. In order to avoid this kind of interference, most detectors have a faraday shield and ground balance circuits to "de-sensitize" the electronics so it will find signals that are not buried in the noise. The remaining signal is focused on the magnetic field with the electric field removed.

PD theory
If we compare a simple TX/RX coil type PD LRL to a metal detector, the first difference is there is no Faraday shield. The PD is also equipped with adjustments that allow it to be tuned much deeper into the noise region, and in some cases beyond stable circuit operation. We hear the experts of LRLs tell how it is necessary to move very slowly and hold the PD steady out in front pointed below the horizon, as well as not to wear clothing that collects static. It would seem they are trying to detect a signal at the extreme sensitivity adjustment, where any user movements could cause false signals. In fact, I expect this sort of detection to pick up a lot of EMI/RF and other interference noise from the air. The signals they are looking to find are not eddy current signals. For a VLF coil to receive a signal more than a meter or so, it must be operating as a radio receiver looking for variations in the broadcast signal. Without a Faraday shield, the electric field is not inhibited, so full RF TX and RX are possible. Possibly the amount of RF that is absorbed in the soil changes, and the diffraction of RF can be sensed. Or maybe there are RF reflections when a target is in range. According to some of the LRL experimenters, there is a hot spot in the location of long time buried metals that interacts with the signal they receive. It is unclear whether this signal must be transmitted, or if it exists separately from a transmitter, and can be detected with a simple passive receiver.


So far I described the theoretical difference between only one kind of LRL and a metal detector. There are many other kinds of LRLs.

The common difference LRLs all have from a metal detector can be summarized as follows:
1. They are claimed to detect metals at long distance using methods that cannot be demonstrated to be working live in front of skeptical witnesses.
2. Most LRLs require long-time buried metals in order to work. LRL experts claim they detect a secondary phenomenon that develops after metal has been buried a long time. But what secondary phenomenon they claim to detect has never been explained in a manner that can be demonstrated or duplicated. Usually the method of operation claimed can be shown to be untrue with simple instruments.
3. Anyone with electronics and construction skills can build a metal detector that works. Nobody can build an LRL that works except a very few people who do not demonstrate the LRL working in front of skeptical witnesses*. The idea that their LRL works exists only in their stories, not in the experience of most people who read their stories.
4. All LRLs seem to require special methods or skills to use them successfully. From dowsing to electronic coil LRLs, there are special instructions that must be followed before any chance of detecting can happen. Also the "environmental conditions" must be favourable in order for them to work. These requirements seem to work to compliment the fact that LRLs cannot be demonstrated in front of skeptical witnesses. These requirements also work to compliment the fact that nobody can build an LRL except the very few people who say they can, but do not demonstrate them working.

Those are some differences between metal detectors and LRLs that I have observed from a technical perspective.
Are there any LRL builders or users that see some errors in my observations, or know some more differences?

Best wishes,
J_P

* Exception: Morgan and Geo demonstrated LRLs they built to other forum member (not completely skeptical). Maybe there are a few others who also did?

Hi J_ Player, hi all
Thanks for your exactly point of view. It was usefully. But my question from you and other
Members about " absorption with stimulator transmitter " now .

How it work ? I need data for designing …….
Best regards.

[detectoman]

morgan, i think you can eliminate aluminium detection, whit modification on coil form, & wire's specification, or anten frecuences etc
each tipe of lrl is whit distinct capabilites and distinct troubles

[J_Player]

Hi J_ Player, hi all
Thanks for your exactly point of view. It was usefully. But my question from you and other
Members about " absorption with stimulator transmitter " now .

How it work ? I need data for designing …….
Best regards.Nobody has ever given information about absorption with a stimulator transmitter. For long range metal detecting, the term absorption is meaningless outside the context of light, in which light frequencies can be absorbed by various materials. Another possibility is in reference to RF which can be absorbed by materials depending on the frequency of the RF and the composition of the materials that are absorbing the RF.

According to Esteban, there are emissions from the ground of long time buried metals which he depicted as a sine wave in his diagram above titled "phenomenon from gold signal".
Does this mean that long time buried metals emit a sine wave?

I don't think so.
What does it mean?

-- Nothing that can be measured or demonstrated with any standard instruments. The only instrument that is claimed to absorb these alledged emissions from buried metals is an LRL.
The design and construction details are shown in Esteban's post above so you can build an emission sensor to detect the "phenomenon from gold signal" for yourself and decide if there are any emissions from long time buried metals.

However, the diagrams from Esteban do not show how to build an absorption with stimulator transmitter. It is simply a passive receiver. The basic design of the passive receiver is the same as a simple radio receiver with an amplifier. The important details are in the construction, which apparently is designed to optimize the signal received to select a very specific artifact from the noise being tuned.

If you wanted to build a version that has a stimulator transmitter, then you may need to use a different design than the one shown. Vernell Electronics sells the kind you are asking about which consist of a 555 signal generator to send a signal into a field, while holding a small hand-held coil receiver that tunes RF as you walk through the field. Theoretically, you should find a signal line running from the target metal to the transmitter where you will find altered reception of the TX signal from your coil.

The 555 signal generator has a selector switch that will chose various frequencies used to find different metals. It the early models such as the VR-800, the 555 circuit has no power amp, and simply sends the 555 output to be broadcast.

Here is a photo of another similar kind of LRL that uses a stimulator transmitter and coil receiver:

[FrancoItaly]

Hi All
I think that, as Esteaban says, the phenomenon it has many aspects and with a passive receiver we will have many difficulties in order to select the just signal. The better thing it's to use a transmitter/receiver system and to look for little changes in received signal. Obviously some frequencies are better than others and it's necessary to maximize the "antenna arrangement" in order to pick up and to converter the "lrl signal". I'm working about a ferrite arrangement, TR-IB Balance, for the moment only in my laboratory.

Best Regards

[aft_72005]

Hi J_Player ,
Yes, I remember 555 stimulator which applied some frequency to ground ,
Also Carl had report about it, I examined this method with LRODS at the past , there isn’t
100 % success with it , some times I did think rods show target and some times
Nothing , it wasn’t reliable .

The other method with stimulator, there is transmitter ahead of receiver,
All of the detector seems as pistol detector. Completely electronic .
May be other LRL expert, saying more in the matter
Best regards.

[Esteban]

MFD´s not good for small objects... I know you found jesuitic treasure with MFD,congratulations ;)

Deppend, if the coils is in spiral, yes. Size of the object detected: a silver item of the size of button at 15 cm depth. The Jesuitic objects was candelabrums, a strange copper-silver crown and few other objects.

[Esteban]

Nobody has ever given information about absorption with a stimulator transmitter. For long range metal detecting, the term absorption is meaningless outside the context of light, in which light frequencies can be absorbed by various materials. Another possibility is in reference to RF which can be absorbed by materials depending on the frequency of the RF and the composition of the materials that are absorbing the RF.

According to Esteban, there are emissions from the ground of long time buried metals which he depicted as a sine wave in his diagram above titled "phenomenon from gold signal".
Does this mean that long time buried metals emit a sine wave?

I don't think so.
What does it mean?

-- Nothing that can be measured or demonstrated with any standard instruments. The only instrument that is claimed to absorb these alledged emissions from buried metals is an LRL.
The design and construction details are shown in Esteban's post above so you can build an emission sensor to detect the "phenomenon from gold signal" for yourself and decide if there are any emissions from long time buried metals.

However, the diagrams from Esteban do not show how to build an absorption with stimulator transmitter. It is simply a passive receiver. The basic design of the passive receiver is the same as a simple radio receiver with an amplifier. The important details are in the construction, which apparently is designed to optimize the signal received to select a very specific artifact from the noise being tuned.

If you wanted to build a version that has a stimulator transmitter, then you may need to use a different design than the one shown. Vernell Electronics sells the kind you are asking about which consist of a 555 signal generator to send a signal into a field, while holding a small hand-held coil receiver that tunes RF as you walk through the field. Theoretically, you should find a signal line running from the target metal to the transmitter where you will find altered reception of the TX signal from your coil.

The 555 signal generator has a selector switch that will chose various frequencies used to find different metals. It the early models such as the VR-800, the 555 circuit has no power amp, and simply sends the 555 output to be broadcast.

Here is a photo of another similar kind of LRL that uses a stimulator transmitter and coil receiver:

You're right. The sine wave is only indicative.

Esteban

[detectoman]

estaban: please; what class of lrl is totally omnidireccional? ( que no necesite orientacion cardinal ) thanks in advance

[Morgan]

Deppend, if the coils is in spiral, yes. Size of the object detected: a silver item of the size of button at 15 cm depth. The Jesuitic objects was candelabrums, a strange copper-silver crown and few other objects.


You mean one coil TESLA, or normal coil like in BFO metal detectors ?
Can you show picture of LRL coil for small objects ?

Thanks
11725

[Esteban]

You mean one coil TESLA, or normal coil like in BFO metal detectors ?
Can you show picture of LRL coil for small objects ?

Thanks
11725

No exactly Tesla's spiral coil. Simple spiral coil I have posted here. I posted method how you can do.

http://www.geotech1.com/forums/showthread.php?t=16390

[Esteban]

estaban: please; what class of lrl is totally omnidireccional? ( que no necesite orientacion cardinal ) thanks in advance

Un detector omnidireccional necesita de un sistema mecánico rotatorio para ir moviendo el sensor en todas las direcciones.

[aft_72005]

Hi FrankoItaly :)
Yes , my intention was this system "Absorption type PD with transmitter ."
Thanks for your opinion , as there are some LRL expert here , maybe didn't
Like saying more in the matter , any way …… .
Best regards.

[Morgan]

Hi FrankoItaly :)
Yes , my intention was this system "Absorption type PD with transmitter ."
Thanks for your opinion , as there are some LRL expert here , maybe didn't
Like saying more in the matter , any way …… .
Best regards.

DCH 85

Absorption LRL

Receiver + Transmiter,oscillator

Receiver Antenna with gold sample for electromagnetic resonance...


11735

11736

[Morgan]

Hi FrankoItaly :)
Yes , my intention was this system "Absorption type PD with transmitter ."
Thanks for your opinion , as there are some LRL expert here , maybe didn't
Like saying more in the matter , any way …… .
Best regards.


I supose the ICONOS is also Absorption LRL with RX/TX ,only the gold sample is in diferent position for better resonance.



11737

[Esteban]

I supose the ICONOS is also Absorption LRL with RX/TX ,only the gold sample is in diferent position for better resonance.



11737

This pic aren't Iconos...

[Morgan]

This pic aren't Iconos...


Maybe this one...

11738

[Morgan]

This pic aren't Iconos...



I see you know very well each part of the ICONOS...;)

Can you show better resonating chamber to adapt in this LRL ?

Regards

[aft_72005]

Hi Morgan
Yes, I know dch85 . are you know "what is transmitter working frequency" ?
Other thing, the blue coil housing isn’t dch85 , it is pistol
Detector which built by Esteban .
Best regards .

[Esteban]

I see you know very well each part of the ICONOS...;)

Can you show better resonating chamber to adapt in this LRL ?

Regards

Mmmmm!!!! :lol: The resonating chamber is OK. Improve electronics? Maybe, always can be improved.

[FrancoItaly]

Hi All
1- 4 wires to head, red= +power, black= -power, the others not shielded then DC signals, one perhaps = V/2 power.
2- Tr coil it has many turns, then the frequency may be 1 Mhz, to the
maximum.
3- In appearance it seems that there isn't a Rx coil and the ionic sensor, located near and out of Tx coil, it's the only generator for Rx signal.
4- The loop around the head, with a single turn, it's tuned with small inductor e capacitor, then his resonating frequency is at
least 10 Mhz or more, surely a harmonic frequency of Tx stage.
5- The loop it is connected with nothing but a change in inductance
or a change in the surround electric/magnetic fields it
may change some parameters in Tx coil or in the sensor.
6- There are few electronic components, surely a transistor oscillator for Tx coil, a sensor amplifier and a germanium diode (high frequency rectifier) and IC (a DC amplifier).
Some other ideas?
Best Regards

[Esteban]

Hi All
1- 4 wires to head, red= +power, black= -power, the others not shielded then DC signals, one perhaps = V/2 power.
2- Tr coil it has many turns, then the frequency may be 1 Mhz, to the
maximum.
3- In appearance it seems that there isn't a Rx coil and the ionic sensor, located near and out of Tx coil, it's the only generator for Rx signal.
4- The loop around the head, with a single turn, it's tuned with small inductor e capacitor, then his resonating frequency is at
least 10 Mhz or more, surely a harmonic frequency of Tx stage.
5- The loop it is connected with nothing but a change in inductance
or a change in the surround electric/magnetic fields it
may change some parameters in Tx coil or in the sensor.
6- There are few electronic components, surely a transistor oscillator for Tx coil, a sensor amplifier and a germanium diode (high frequency rectifier) and IC (a DC amplifier).
Some other ideas?
Best Regards

The circuitry you can see in pics is only a part. There are main PCB into pistol box.

About point 5. the tune coil connected with nothing is an accelerator of the detection. This is not critic. The accelerator was discovered by Alonso and Toto Coronel in 1959, 60 or 61, don't remember very well. When detector use this, we say: "Totorized".

[Morgan]

Hi Morgan
Yes, I know dch85 . are you know "what is transmitter working frequency" ?
Other thing, the blue coil housing isn’t dch85 , it is pistol
Detector which built by Esteban .
Best regards .


Well,this one build by Esteban works more sensitive than DCH 85 Mineoro.

No,i dont know the frequencies...

[FrancoItaly]

Hi Esteban
Surely there are many other PCB, but the heart it's the head with coils, the other circuits I think they work with DC signal, perhaps there is only a coil, the Tx coil, or other ferrite coils in the control box?
You say that the loop is not critic but it's surely tuned.
Best Regards

[Esteban]

Hi Esteban
Surely there are many other PCB, but the heart it's the head with coils, the other circuits I think they work with DC signal, perhaps there is only a coil, the Tx coil, or other ferrite coils in the control box?
You say that the loop is not critic but it's surely tuned.
Best Regards

There are not TX in this machine, except the stimulator coil for the loop.

[FrancoItaly]

Hi Esteban
For Tx I mean a oscillator that drives a coil and then there is a magnetic field near the instrument. I think that it's necessary to have a stable Rx signal with a single operative frequency.
Best Regards

[Morgan]

Hi Esteban
For Tx I mean a oscillator that drives a coil and then there is a magnetic field near the instrument. I think that it's necessary to have a stable Rx signal with a single operative frequency.
Best Regards


What you are studing and discovering now,was done sucessful by Damasio and Alonso long time ago...

[FrancoItaly]

Hi Morgan
I do not expect to discover nothing, I want only to realize a working lrl and for this purpose I try to understand the operation principles. I have much respect to Alonso, Damasio and also to Esteban, that he has introduced us to lrl'world
Best Regards

[Morgan]

Hi Morgan
I do not expect to discover nothing, I want only to realize a working lrl and for this purpose I try to understand the operation principles. I have much respect to Alonso, Damasio and also to Esteban, that he has introduced us to lrl'world
Best Regards


When i was visiting Mineoro in Brazil,Damasio gave me one book about his studing and LRL discoverie,the book "Fenomenos do sub-solo,experiencias com ouro e prata" this book teach a lot,maybe you can get one of this in english traduction...
In this book he explain how the precious metals create electromagnetic fields when underground many years,and what kind of devices can detect them and the real distances,METERS NOT KILOMETERS ;)

Regards

[Esteban]

Hi Esteban
For Tx I mean a oscillator that drives a coil and then there is a magnetic field near the instrument. I think that it's necessary to have a stable Rx signal with a single operative frequency.
Best Regards

Actual "discovery" (maybe I'm wrong, regarding discovery or not-discovery) show that any passive receiver emits in the frequency tuning. But this can measurable with no contact scientific frequencymeter. Today I saw in Alonso's labo! The emission is short, maybe only 7-8 cm. For example, if you touch the tuning coil or connect oscilloscope in it, the low level emision vanishes.

[hung]

Actual "discovery" (maybe I'm wrong, regarding discovery or not-discovery) show that any passive receiver emits in the frequency tuning. But this can measurable with no contact scientific frequencymeter. Today I saw in Alonso's labo! The emission is short, maybe only 7-8 cm. For example, if you touch the tuning coil or connect oscilloscope in it, the low level emision vanishes.

That's right. But as you may know, there's one measuring aproach which overcomes this issue. But of course, this is secret.

[Esteban]

That's right. But as you may know, there's one measuring aproach which overcomes this issue. But of course, this is secret.

This is part about how the "phenomenon" can be detectable via "passive" (now active?) receiver.

P.S.: I have confirmed by Alonso that the "new DCH" is the pistol detector called "Oscilador 2000".

[FrancoItaly]

Hi Esteban
I remember an old instrument, a Grid-dip-meter, used in order to determine the resonance frequency of a tuned coil, without some electric contact. the tuned coil it absorbed some very little energy from tube oscillator and it caused a change in some parameters of the instrument. This was possible for the very high impedance of the input grid tube. I think that a coil tuned on a high armonic of a oscillator acts as a sort of frequency converter, that's it can translate in a lower frequency any change of the high frequency. For Morgan I am a lot interested of Damasio'book but I don't think that it's possible for me to obtain a English translation, however I thank you.
Best Regards

[Esteban]

Hi Esteban
I remember an old instrument, a Grid-dip-meter, used in order to determine the resonance frequency of a tuned coil, without some electric contact. the tuned coil it absorbed some very little energy from tube oscillator and it caused a change in some parameters of the instrument. This was possible for the very high impedance of the input grid tube. I think that a coil tuned on a high armonic of a oscillator acts as a sort of frequency converter, that's it can translate in a lower frequency any change of the high frequency. For Morgan I am a lot interested of Damasio'book but I don't think that it's possible for me to obtain a English translation, however I thank you.
Best Regards

I think that the device used is not a dipmeter. A dipmeter consist in an oscillator. From Wikipedia:

Grid dip oscillator (GDO), also called grid dip meter, dip meter, dipmeter, or just dipper, is a measuring instrument (http://www.geotech1.com/wiki/Measuring_instrument) to measure resonant frequency (http://www.geotech1.com/wiki/Resonant_frequency) of radio frequency (http://www.geotech1.com/wiki/Radio_frequency) circuits. It measures the amount of absorption of a high frequency (http://www.geotech1.com/wiki/High_frequency) inductively coupled magnetic field by nearby objects. It is an oscillator (http://www.geotech1.com/wiki/Electronic_oscillator) whose output energy changes in the vicinity of a resonant circuit which is tuned to the frequency the oscillator generates; somewhat similar to an acoustic tone becoming louder when generated in the vicinity of a resonant cavity or a string tuned to the same frequency. At the heart of the instrument is a tunable LC circuit (http://www.geotech1.com/wiki/LC_circuit) with a coil (http://www.geotech1.com/wiki/Coil) that serves as a loose inductive coupling to the measured LC resonant circuit (http://www.geotech1.com/wiki/Resonant_circuit). Resonance is indicated by a dip in the meter indicator on the device, usually based on a microammeter (http://www.geotech1.com/wiki/Microammeter).

[FrancoItaly]

Hi Esteban
My idea it's that Grid dip meter explanes as a tuned coil can influence another coil some cm away. However electromagnetism laws they explain the mutual infuence between 2 coil.
Best Regards