Lrl from Italy

[Babak Ruby]

[ QUOTE = FrancoItaly؛ 162220 ] [/QUOTE

Is Can we remove the oscillator from the circuit with a switch and control the zero volt border in different areas with a digital display?

[FrancoItaly]

[ QUOTE = FrancoItaly؛ 162220 ] [/QUOTE

Is Can we remove the oscillator from the circuit with a switch and control the zero volt border in different areas with a digital display?

If you unplug the oscillator the lrl doesn't work, the sensor stage amplifies the oscillator signal and the phenomenon somehow interacts with it in mixer TR2.

[Babak Ruby]

If you unplug the oscillator the lrl doesn't work, the sensor stage amplifies the oscillator signal and the phenomenon somehow interacts with it in mixer TR2.What I mean is to put a switch after the oscillator so that before exploring, we can set the zero volt limit of the sensor output in different geographical areas with a voltmeter, then put the oscillator in the circuit to explore, please.

[FrancoItaly]

What I mean is to put a switch after the oscillator so that before exploring, we can set the zero volt limit of the sensor output in different geographical areas with a voltmeter, then put the oscillator in the circuit to explore, please.

Maybe I didn't explain myself well, if you disconnect the oscillator at the sensor stage output there are 0V anywhere in the world.

[Babak Ruby]

I am using the digital display in your plan and I want to put a switch for the oscillator to make sure that the output of the sensor is zero in different areas and then connect the oscillator.

[Babak Ruby]

I doubt that this will not have a negative effect on the performance of the oscillator

[abdou2014]

HI DEAR FRIEND FRANCO , I HAVE A FRIEND WHO HAVE PROBLEM IN VOLTAGE OUTPUT TR5 ?

[FrancoItaly]

You can decrease R13 from 4.7K to 3.9K or 3.3K to get around 4V but 3.3V is an acceptable value. Regarding TR5, the correct voltage is obtained during the calibration phase as explained in the helps.

[abdou2014]

HE HAS 0.3 V AT TR5 EMITER

[FrancoItaly]

As I told you the voltage on the emitter of TR5 depends on the setup.

[Basellafe]

The same problem l have 3mv

[FrancoItaly]

The same problem l have 3mv

With the quartz disconnected can you get a self oscillation? Are the transistors all type "C" with gain greater than 500? To increase the gain (and obtain self oscillation) as well as increasing C13/c14 you can decrease R10/R12, for example 560 or 470 ohms.

[Basellafe]

Without quartz 0 volt on tr5 emeter tr1and5 is bc549c tr2.3.4 isbc183c i tryed to change value to resester 10 .12 no change and 4.7 no change

[FrancoItaly]

Without quartz 0 volt on tr5 emeter tr1and5 is bc549c tr2.3.4 isbc183c i tryed to change value to resester 10 .12 no change and 4.7 no change

Connect the quartz and vary C2/C3/C4 until you have an output voltage, for example leave only C2 (1 pF), if that's not enough put C2/C3 in parallel (2 pF). The self oscillation is due to a parasitic connection of the pcb, maybe it doesn't happen in your case.

[FrancoItaly]

I post the Dream Man pcb at the request of a forum member.

[Basellafe]

Second board works

[FrancoItaly]

Second board works

Can you post it here?

[Basellafe]

https://youtube.com/shorts/he5oUehvAak?feature=share3

[FrancoItaly]

https://youtube.com/shorts/he5oUehvAak?feature=share3


is it another version of Dream_Man pcb?

[Basellafe]

Yes iranian vertion but the same direction of lines of dream man pcb

[FrancoItaly]

Yes iranian vertion but the same direction of lines of dream man pcb

Can you explain better for other forum members?

[Basellafe]

They have to read 122 bages

[Basellafe]

.

[Basellafe]

I want to ask you franco about my device ist working right or not . but about Electronic lighter there's no effect
https://youtube.com/shorts/1IjinwcVNHA?feature=share3

[FrancoItaly]

I want to ask you franco about my device ist working right or not . but about Electronic lighter there's no effect
https://youtube.com/shorts/1IjinwcVNHA?feature=share3

I always recommend checking that by touching the antenna the signal decreases, in this way we know that the sensor stage works correctly and there are no self oscillations. The other tests are not valid and the definitive test is in the field with a metallic target (silver or gold) buried for a few months. Without a test field you have to try it in any terrain and check the signals with the metal detector.

[Basellafe]

By touching antinna the volt decrease about 100ml so in this device maybe work right or not that is the only test you recommend and the field

[FrancoItaly]

By touching antinna the volt decrease about 100ml so in this device maybe work right or not that is the only test you recommend and the field

Yes.

[Basellafe]

https://youtube.com/shorts/omaGfzihxQE?feature=share3

[FrancoItaly]

https://youtube.com/shorts/omaGfzihxQE?feature=share3

The fact that there is a strong signal inside the house proves that all the electronics of the lrl are working properly but as I always say the most important test is outdoors.

[Yusufyaba]

mr franco
Do you have any field test video or home environment test video available? I couldn't see it.
detailed how it reacts to which object or how it reacts to electronic devices.
How about sending a detailed video?

[FrancoItaly]

mr franco
Do you have any field test video or home environment test video available? I couldn't see it.
detailed how it reacts to which object or how it reacts to electronic devices.
How about sending a detailed video?

I have no video, the only well done (that I know of) is this:

https://www.youtube.com/watch?v=yR3tzT2Jd-g&t=32s

However as I said the tests inside the house are of little importance.

[Sneshko]

mr franco
Do you have any field test video or home environment test video available? I couldn't see it.
detailed how it reacts to which object or how it reacts to electronic devices.
How about sending a detailed video?

Dear Yusufyaba, you see here:

https://youtu.be/iuNZ_oSeZwE

and..

https://youtu.be/5CwQJBPe3jo

Regards!
Sneshko

[Yusufyaba]

Thank you very much .
These videos are enough. I think there's an electric field there that's sensitive to it.
I tried in the past, but since I don't have a test area, it was garbage for me


Do you think finding the electric field or seeing the static energy on a plastic bag is equivalent to finding a buried object?

[FrancoItaly]

I don't think there is a valid way to simulate the phenomenon, however my lrl is not sensitive to static fields, as it should have a very high impedance.

[Basellafe]

On a copper kettle https://youtube.com/shorts/qeNcy54KjdA?feature=share3

[Pahom]

[/QUOTE]You will have to wait at least two months and the signal capture distance will increase. Congrats on the device!!!!!!!!!!!

[Basellafe]

Thanks poham iwant to ask you if there is a metal in box how it will be the device response

[Pahom]

Thanks poham iwant to ask you if there is a metal in box how it will be the device response
It all depends on interference. If there is a lot of their interference, then it is better to shield the case.

[Basellafe]

Thanks again pohram idont mean the device isheild the device but i mean if there is a treasure in abox of metal is this device can detect it

[Pahom]

Thanks again pohram idont mean the device isheild the device but i mean if there is a treasure in abox of metal is this device can detect itOnly a search will give you the answer. I have not had such cases. Franco wrote to you, and other participants, and the builders of this device more than once, only a real search on rough terrain will give you answers to all questions, like depth, distance and metals found by the device. And everyone has different results. My result is 1 meter and no more than 10 cm of large aluminum objects in the northeast direction. I didn?t make the case at all, just the top layer of the copper board when I did the experiments. So only a real search will give you answers. A friend of mine from Iran is very pleased with the 4046 circuit with a ferrite antenna tuned to 200kHz. He digs all the signals, everything comes across, especially very old rusty knives, nails, but next to him very often, checking with a metal detector, he finds small silver items. So just search. The road will be mastered by the walking good luck to you !!!!!!!!!!

[Babak Ruby]

Hi Franco, what do you think if we add an RF oscillator with a frequency of kHz and a suitable bandwidth to the mixer?

[FrancoItaly]

Hi Franco, what do you think if we add an RF oscillator with a frequency of kHz and a suitable bandwidth to the mixer?

My attempts with a lower frequency (62 Khz) have not been successful, probably a ferrite antenna is needed, tuned with the oscillator.

[fasdoc]

Hi Mr Franco, congratulations for your work, I can't read the new display stage PDF , it's open a picture like blurry colors. If it is not hard I'd like to upload it again, or if you know how to see the PDF normally, also I have the same problem with the 20mhz file, it looks like a color blured picture.
Finally, I read everything from 2013 until today and you can write a book with it. Congratulations again for your patience with all the opposite opinions for your work.
You are not alone to this journey and a big thanks!

[fasdoc]

I have fix it, my PDF reader wasn't ok,

[FrancoItaly]

I have fix it, my PDF reader wasn't ok,

The 20 Mhz lrl is more sensitive than the 8 Mhz lrl as L1/C10 is tuned to a 20 Mhz harmonic, however it is more difficult to implement. A test that could be done is to increase the frequency of the quartz, from 8 Mhz to 10 Mhz (or 12 Mhz) and increase L1, from 3 to 4 (or 5) turns and use a variable capacitor instead of C10, possibly putting a capacitor in parallel.

[FrancoItaly]

Hi Mr Franco, congratulations for your work, I can't read the new display stage PDF , it's open a picture like blurry colors. If it is not hard I'd like to upload it again, or if you know how to see the PDF normally, also I have the same problem with the 20mhz file, it looks like a color blured picture.
Finally, I read everything from 2013 until today and you can write a book with it. Congratulations again for your patience with all the opposite opinions for your work.
You are not alone to this journey and a big thanks!

Thanks for the compliments, I hope you made the original version and it works well.

[ERDOGAN37]

https://youtube.com/shorts/wQa1rdJugq0?feature=share:)

[FrancoItaly]

https://youtube.com/shorts/wQa1rdJugq0?feature=share:)

Can you give any details about the buried metal?

[ERDOGAN37]

I came across very old metal remains. Silver Copper like lead

[FrancoItaly]

I came across very old metal remains. Silver Copper like lead

Fine thanks

[FrancoItaly]

I post the 8Mhz and 20Mhz versions at the request of a forum member.

[FrancoItaly]

I haven't tried the pcb by Omar, I don't know if it's double-sided.

[FrancoItaly]

I haven't tried the pcb by Omar, I don't know if it's double-sided.

I post the Dream_Man pcb for a member.

[Dubulumach]

Hello dear Franco! :)

How do you do and how is your wife. Are you in Italy or Swiss ?
Be healthy both. :)

Regards

[FrancoItaly]

Hello dear Franco! :)

How do you do and how is your wife. Are you in Italy or Swiss ?
Be healthy both. :)

Regards

I'm quite well, thanks and you? Unfortunately my partner passed away in 2020 and I returned to Italy. We are living in a particular period, the "great awakening" and I am convinced that we will see extraordinary things.

[omar]

Hello my friend Franco
Is the phenomenon is the nuclear magnetic resonance of metals. We noticed that the deeper the mineral, the warmer and more active it was. The metal with heavy atoms is more active. The sign changes according to time and place.Note that the sign of non-ferrous metals is negative. Give me your opinion, thanks

[FrancoItaly]

Hello my friend Franco
Is the phenomenon is the nuclear magnetic resonance of metals. We noticed that the deeper the mineral, the warmer and more active it was. The metal with heavy atoms is more active. The sign changes according to time and place.Note that the sign of non-ferrous metals is negative. Give me your opinion, thanks


Any theory must take into account that the phenomenon appears after a certain burial time, therefore it is probable that there is interaction between metal and soil, moreover the phenomenon is present on a wide range of frequencies, audio frequencies/rf frequencies/infrared/ultraviolet.

[omar]

Thank you, my friend Franco.
According to my follow-up on the subject of this phenomenon, this ray needs a physical body or a vacuum to move, and it weakens and fades in open air. It is weakened by moisture and cold, and carries real pictures of the buried body, live and direct, in black and white monochrome. If it is polarized, collected, and detected by dark-field microscopy, then it is certainly particles like fog, not waves. The problem with sensors is poor selectivity and they are not disciplined on the desired target. It senses almost everything in the real field that makes it useless due to our lack of information about the phenomenon and its characteristics. I am trying to understand more of this ray. Thank you..!
I have noticed some electronic sensors. A sample of gold is added to the device for selectivity. I do not know how it works and the feasibility of that.

[FrancoItaly]

Thank you, my friend Franco.
According to my follow-up on the subject of this phenomenon, this ray needs a physical body or a vacuum to move, and it weakens and fades in open air. It is weakened by moisture and cold, and carries real pictures of the buried body, live and direct, in black and white monochrome. If it is polarized, collected, and detected by dark-field microscopy, then it is certainly particles like fog, not waves. The problem with sensors is poor selectivity and they are not disciplined on the desired target. It senses almost everything in the real field that makes it useless due to our lack of information about the phenomenon and its characteristics. I am trying to understand more of this ray. Thank you..!
I have noticed some electronic sensors. A sample of gold is added to the device for selectivity. I do not know how it works and the feasibility of that.


If these lrl rotate around the handle they are tools based on dowsing and the real tool is the human body and its mind, for example diviners use a tree branch and I assure you they work, I have personally seen a diviner who has reported the presence of water in my land and in fact I had a well built where the water is 60 m. deep, in the exact point indicated.

[fasdoc]

If these lrl rotate around the handle they are tools based on dowsing and the real tool is the human body and its mind, for example diviners use a tree branch and I assure you they work, I have personally seen a diviner who has reported the presence of water in my land and in fact I had a well built where the water is 60 m. deep, in the exact point indicated.

Greetings to all,
I want to add also that the people who are sensitive to this phenomenon are very sensitive to millivolts, even if they are in a capacitor... like 100uf16v.... I have seen it. Those abilities can go from father to son and to grandson. Personally, I don't have it but my cousin and his father my uncle. Finally I want to congratulate you all for your time to write to this post and especially to Mr Franco for his contribution to sharing a knowledge to all as global society we must be

.

[FrancoItaly]

Greetings to all,
I want to add also that the people who are sensitive to this phenomenon are very sensitive to millivolts, even if they are in a capacitor... like 100uf16v.... I have seen it. Those abilities can go from father to son and to grandson. Personally, I don't have it but my cousin and his father my uncle. Finally I want to congratulate you all for your time to write to this post and especially to Mr Franco for his contribution to sharing a knowledge to all as global society we must be

.


Several people have above-average sensitivities, I myself practice pranotherapy (for family and friends) and a friend of mine as well as practicing remote pranotherapy as well as always making diagnoses at a distance, even many kilometers away.

[folharin]

I post the Dream_Man pcb for a member.give up on this project!!

[omar]

Welcome . They say in general metals reflect the electromagnetic beam and begin to resonate at the harmonic frequency only. For example, if a plate of gold is placed between two sheets of copper at the signal entrance of a highly sensitive electronic receiver, the plate of gold will prevent the signals from passing through and reflect them. In contrast, it will absorb and pass the harmonic signal. What do you think of this filter? I think the signal is treated like high frequencies, microwaves, similar in small capacitance. with a low pulse. Is there a comment.

[FrancoItaly]

Welcome . They say in general metals reflect the electromagnetic beam and begin to resonate at the harmonic frequency only. For example, if a plate of gold is placed between two sheets of copper at the signal entrance of a highly sensitive electronic receiver, the plate of gold will prevent the signals from passing through and reflect them. In contrast, it will absorb and pass the harmonic signal. What do you think of this filter? I think the signal is treated like high frequencies, microwaves, similar in small capacitance. with a low pulse. Is there a comment.

All theories must explain the fact that buried metal only generates the phenomenon after months or years.

[omar]

There are no theories. My idea is to use gold to detect gold based on the nuclear magnetic response of the metal atoms on the basis of resonance harmonics. in the field of land. We lack finding ways to apply and make sure of work and feasibility. When the gold sample enters a resonant field (buried gold), energy exchange will occur for the atoms of the gold sample, and a weak magnetic oscillatory signal will be given as a reaction. It can be detected with an electric circuit. Thank you

[omar]

All theories must explain the fact that buried metal only generates the phenomenon after months or years.



I saw a camera that works on the principle of phenomenon, depicting a dry water well. Water was pumped from a truck into the well, and for a moment water began to appear filling the void, the color of the water was black. This indicates that the phenomenon appears quickly, but it takes time to become more intense on the surface.

[FrancoItaly]

I saw a camera that works on the principle of phenomenon, depicting a dry water well. Water was pumped from a truck into the well, and for a moment water began to appear filling the void, the color of the water was black. This indicates that the phenomenon appears quickly, but it takes time to become more intense on the surface.

If the camera is sensitive to infrared it is possible that it only senses the temperature difference between the void and the water, I'm not sure if this is the phenomenon.

[perzo]

Hi everyone. When I put my hand close to the Franko antenna, the LED turns off. Where is the problem? Thanks.

[FrancoItaly]

Hi everyone. When I put my hand close to the Franko antenna, the LED turns off. Where is the problem? Thanks.

No problem, in fact one of the tests I suggest is to check if touching the antenna decreases the signal. This tells us that the sensor stage is working properly.

[Zicos]

hi mr franco.i'm new to the forum.and completely new to electronics.but i managed and made your 8mhz sensor.in the first one i made i used bc547c and c9,c13,c14(680pf)and c2(4?2.2pf)in series .the output voltage is 5.35v with 8mhz crystal . when I touch the 5.34v antenna, there is a voltage drop, that is, the sensor is working correctly. inside the house, it does not react to electronic devices. it only picks up the mobile phone call, and that too from very close. outside in the garden, it picks up a very good signal from a distance of 2 meters but from south to north and 0.50 cm from north to south. from the other directions it does not catch anything. I have seen the spot with a metal detector and I believe it is a copper alloy coin from my experience. I do not dig it to have it as tests. but in my field where I have an old copper pot buried for 5 months, it doesn't catch it. I don't have gold and silver yet to put it in. at night it works with only one LED while during the day all three light up. it is believed that it doesn't tune in my area??????what do you recommend me to do????the copper board is double sided with top side bonding, I have the sensor in Faraday shield and the whole box also with ground and aluminum foil the handle is 30 cm from my hand. I am from Greece. and one more thing I would like to ask you and anyone else who knows about the silver loop, how is it made with the wire dimensions, loop diameter? greetings to all forum members and thanks to the admins for accepting me....

[FrancoItaly]

I think the sensitivity of the sensor stage is insufficient. In the calibration did you obtain self oscillation with the quartz oscillator disconnected? I attach the helps and add, perhaps it wasn't understood in the helps) that at the beginning you have to obtain the self oscillation and therefore you have to decrease the gain (via C13 and C14) until it disappears.
The maximum sensitivity in our hemisphere is in the north/south direction and the minimum is south/north.

[Zicos]

hello Mr. Franco, thanks for the quick reply. without crystal the voltage is zero volts. as soon as I connect the antenna the voltage is 1.90 volts with a 97cm antenna and a 25cm antenna connection cable. when I put another antenna the voltage is different again. how do I calibrate for 0 volts without quartz? with antenna or not?, and if with antenna the length of the antenna? sorry for so many questions, thank you for your help, be well.

[Zicos]

good morning Mr. Franco, I did a calibration with a 97cm antenna and a 25cm connection cable, I now put c13(220pf) and c14(100pf) and c9(450pf) and the output voltage is 0 volts without crystal and the voltage with crystal is 5.04 volts. without crystal and with 20cm antenna closed the voltage is 1.50v, as soon as the antenna is open the voltage drops to 0v .what is the problem? is c9 critical in this problem?

[FrancoItaly]

During calibration, in the laboratory, I put a 30cm piece of wire connected to L1 as an antenna, to connect the stylus antenna with L1 I use a cable of about 10cm and I usually extend the antenna 30/40cm. The longer the antenna, the greater the sensitivity, but 1m seems excessive to me.

[Zicos]

thank you very much for helping me. when the calibration is done with the 30-40 cm antenna open and you have 0 volts, then close the antenna is the voltage still 0 volts? or do you have volts?

[Zicos]

what is the mistake i am doing?

[Zicos]

the calibration should be done with:"1"(piece of copper wire or with telescopic antenna,?)and the result should be 0volt without crystal,"2"(the length should be 30-40cm, not less or bigger?)

[FrancoItaly]

For convenience, the calibration is done with a piece of wire instead of the antenna, but it could also be done with the antenna as long as it is placed about 10 cm from L1. The length of the antenna, during calibration, is 40 cm, but you can vary it and see the result. Honestly, I've never measured the piece of wire, I use a connector with two crocodiles and I measured it now, it's 40cm.
These values are indicative, unfortunately the sensor stage is very critical and it is important to obtain maximum gain because the "phenomenon" has a very small amplitude.

[Zicos]

thank you very much..will try it and let you know.

[Zicos]

good morning Mr. Franco. and to the children of the forum. so I tried it as I calibrated it with the antenna open 97 cm and without a crystal 0 volts. and with a crystal 5.04 volts. it did not catch the signal in the garden.. is there any chance that the display is to blame??? (3led p1 22k -p2 500k -p3 10k)

[Zicos]

how can i upload photos????

[FrancoItaly]

how can i upload photos????

Select " Attachmens "

[Zicos]

where is Attachments?

[FrancoItaly]

On the page where you write your post, at the top, in the center, next to the Smiles.

[Zicos]

this piece of copper wire is used by you Mr. Franco to calibrate???

[Zicos]

I also calibrated with this copper wire that you see in the photo and I understood that the volts go to 0 without a crystal as soon as you turn it in another direction it gets volts again. how should I calibrate??? I think the translation doesn't let me understand what do you want to tell me..

[FrancoItaly]

I also calibrated with this copper wire that you see in the photo and I understood that the volts go to 0 without a crystal as soon as you turn it in another direction it gets volts again. how should I calibrate??? I think the translation doesn't let me understand what do you want to tell me..

Inside houses there are many RF signals, the sensor stage with an antenna at the input can definitely detect these signals. The only thing different from you is that you use a rigid piece of copper while I use a flexible wire and that you move the antenna to different positions. Leave the wire in the same position and touch it only to check if the signal decreases (once the oscillator is connected).

[Zicos]

hello mr franco.thank you very much for helping me. i found the problem. for power supply use a 13.5 volt power supply and then i connect a step down for 12 volt. as soon as I put the power supply with 13.5 volts without the step down the problem was solved.. in the garden test and in the field I used a 18650 battery with a step up to have 12 volts. that must be the problem.. but the signal in the garden was very good and clear... as i had it before but in the field nothing is heard. i will do the circuit with the 78012 and see what happens... again thanks a lot.

[FrancoItaly]

The 7812 IC needs at least 15V input to stabilize correctly, otherwise a low drop IC can be used. I use two 9V batteries in series so that the absorption of all the LRL is around tens of milliamps.

[Zicos]

the 9 volt batteries should be simple or do the rechargeable 9 volt ones as well?????

[FrancoItaly]

the 9 volt batteries should be simple or do the rechargeable 9 volt ones as well?????

I use rechargeable batteries and normal ones as a spare. In terms of performance there is no difference.

[Zicos]

good evening Mr. Franco.and to everyone. i made the 7812 circuit .. but i used 5 batteries (18650). because i had her.the sensor now has c9(680pf),c13(680pf),c14(680pf) and c2(2 capacitors in series (2.2pf)....output voltage without crystal is 0v with copper antenna. .....and with 40 cm flexible cable again 0 volts and when the antenna turns the output voltage is again 0 volts. the output voltage with crystal is 5.49 volts when I touch the antenna the voltage does not change it stays the same. in the garden test it catches the signal it was getting from a longer distance. but close to the house it is getting other signals I don't know for sure it is getting it... when I can I will also go to the field to test and let you know what it did..

[FrancoItaly]

there should be a decrease in the signal when touching the antenna, even a small one, otherwise it could be a self oscillation. What transistors did you use?

[Zicos]

i used bc547c

[Zicos]

when I put it in the box and connect the antenna amplifier and did the test in the garden when I touch the antenna the first led lights up and the buzzer sounds. when I calibrated it it showed no change in output voltage.

[FrancoItaly]

The important thing is that there is a variation when touching the antenna, normally it is a decrease. Obviously it is important that it works in the field.

[Milad.salsa]

The important thing is that there is a variation when touching the antenna, normally it is a decrease. Obviously it is important that it works in the field.
Hello Mr. Franco When we want to measure the self-oscillation of the circuit, we remove the crystal from the circuit and adjust the potentiometers p3 and p2. Should the antenna be connected or disconnected?

[Zicos]

hello mr franco... i went to the field but the machine was not catching the target. when adjusting the sensitivity with which pontesiometro do you do it????? the sky and ground effect was there..the compass effect was not. unless I increase the sensitivity more.. how to adjust it?????

[Zicos]

when calibrating with crystal and antenna when i touch the antenna the output voltage does not drop or rise... when i put the antenna amplifier the output voltage goes up.... only if there is auto oscillation in the circuit the output voltage goes down when i touch the antenna without amplifier but also with antenna amplifier... without oscillation how can i achieve reduction of the sensor output voltage when i touch the antenna??????? should there be a change in sensor output voltage when touching the antenna to detect the metal effect?? or does it work like this??? is one of the components at fault????? the prices of the parts are always the same used or do they change sometimes?????what do you think????? sorry for so many questions..

[Zicos]

i made another sensor to see what happens... and it has the same problem. when i touch the antenna the output voltage does not drop or rise it is stable... i use BC548c.. i used that antenna i have and the sensor output voltage is always 0volt without crystal.. with crystal it is 5.44volt with only one capacitor c2(1pf) .if i remove c2 the output voltage is 4v if i remember correctly... that way the output voltage drops when i touch the antenna..

[FrancoItaly]

Hello Mr. Franco When we want to measure the self-oscillation of the circuit, we remove the crystal from the circuit and adjust the potentiometers p3 and p2. Should the antenna be connected or disconnected?

The antenna must be connected.

[FrancoItaly]

i made another sensor to see what happens... and it has the same problem. when i touch the antenna the output voltage does not drop or rise it is stable... i use BC548c.. i used that antenna i have and the sensor output voltage is always 0volt without crystal.. with crystal it is 5.44volt with only one capacitor c2(1pf) .if i remove c2 the output voltage is 4v if i remember correctly... that way the output voltage drops when i touch the antenna..

You talk about antenna amplifier, I'm referring to the original version which doesn't have it.

[abdou2014]

Hello dear friend Franco, I want to know if your LRL works after a rain ?

[Zicos]

.....in the 8mhz sensor..... (1)....in the calibration I used a piece of copper wire 40 cm without reinforcement (as I had it in the photo) and with a crystal the output voltage is 5.44 volts, when I touch the antenna the output voltage does not drop or rise it is always constant 5.44 volts.........(2) ......also (without crystal and with connected antenna without amplifier as in the photo the output voltage it's always 0 volts).....(3)....when i touch the antenna why doesn't the output voltage change????? what do you think is wrong????

[Zicos]

Do you understand what the problem is? is the translation good or not?????

[FrancoItaly]

Hello dear friend Franco, I want to know if your LRL works after a rain ?

I don'tknow.

[abdou2014]

Thank you .

[FrancoItaly]

I have to admit I'm a little confused, let's recap.
1- with the antenna (piece of wire) connected and with the oscillator disconnected (disconnect C2) increase amplification (increase C13/C14 or decrease R10/R12) until self-oscillation is obtained (there must be a stable signal of a few V (not critical) which does not change by touching the wire.
2- decrease the amplification until you get 0V at the output.
3-connect C2, find the correct value that gives 4-6 V output
Check the gain of the transistors, it must be greater than 500, I happened to measure BC...C transistors with gain less than 500.

[Zicos]

thank you very much Mr. Franco.

[Zicos]

good morning mr franco and everyone. how are you??? be always well.

[FrancoItaly]

good morning mr franco and everyone. how are you??? be always well.

I'm fine, I hope the other members of the forum are too, I think that at the moment there are more important things to take care of, the forum should be considered a pastime and a way to meet other people.

[Zicos]

You are right.

[Kazem]

Hello, dear Mr. Franco
Thank you very much for providing the magic plan, my question is whether sky effect and polar effect are similar or what is their difference, is the border of sky effect and polar effect the measure of efficiency. Thank you very much

[Kazem]

Another question, is it possible to connect the shield to the antenna through a separate inductor and capacitor and use the ambient waves as a transmitter? Thank you very much.

[Kazem]

I,m sory

[Kazem]

Something has confused me. When I connect the internal inductor 2 turns to the ground and to the antenna and the external inductor 3 turns to the c10 capacitor with high circuit gain, I don't have a polar effect, but the effect of the sky is very strong, and the test with a copper tray buried in 2.5 meters for 12 years It hunted, but I don't have a radius. The antenna must be buried on the metal to do the sense.

[FrancoItaly]

Another question, is it possible to connect the shield to the antenna through a separate inductor and capacitor and use the ambient waves as a transmitter? Thank you very much.

I don't know, we should try, but first of all it's better to make the original version.

[FrancoItaly]

Hello, dear Mr. Franco
Thank you very much for providing the magic plan, my question is whether sky effect and polar effect are similar or what is their difference, is the border of sky effect and polar effect the measure of efficiency. Thank you very much

Both the sky effect and the compass effect are due to excessive gain, so the only remedy is to decrease the sensitivity.

[FrancoItaly]

Something has confused me. When I connect the internal inductor 2 turns to the ground and to the antenna and the external inductor 3 turns to the c10 capacitor with high circuit gain, I don't have a polar effect, but the effect of the sky is very strong, and the test with a copper tray buried in 2.5 meters for 12 years It hunted, but I don't have a radius. The antenna must be buried on the metal to do the sense.


I advise you to make the original version with 1 coil, I think you are the only one who made it.

[Kazem]

Dear Mr. Franco, thank you for your answer, another experience I had was several different types of antennas, including the diameter of one centimeter and less, all of which were up to one meter. Some antennas receive the polarization effect very little, is this good or is it possible that it is weak in receiving the phenomenon The main point is that if the antenna does not absorb the polarizing effect, it will be weak in absorbing the phenomenon, and will it affect the amplification gain of the circuit?

[Kazem]

Yes, I have made both a single inductor and two inductors. Do you think it is better to use the same coil as the original design because of matching the impedance of the antenna with the circuit?

[FrancoItaly]

Dear Mr. Franco, thank you for your answer, another experience I had was several different types of antennas, including the diameter of one centimeter and less, all of which were up to one meter. Some antennas receive the polarization effect very little, is this good or is it possible that it is weak in receiving the phenomenon The main point is that if the antenna does not absorb the polarizing effect, it will be weak in absorbing the phenomenon, and will it affect the amplification gain of the circuit?

I don't know the answer, I'm not a physicist, we need to experiment. I propose the coil antenna which has approximately the same sensitivity as the stylus antenna, it has the disadvantage that it cannot be modified like the stylus antenna which can be lengthened.

[FrancoItaly]

Yes, I have made both a single inductor and two inductors. Do you think it is better to use the same coil as the original design because of matching the impedance of the antenna with the circuit?

I'm not very familiar with RF, so I can't answer you, the version with the two coils and the one with the amplifier improve the sensitivity slightly, but I don't know if it's worth it. The 20 MHz version is the one that significantly increases the gain, as R1/C10 is tuned to a 20 MHz harmonic, making the TR2 mixer more efficient, but as I said it is very critical to tune. Out of three lrls I've built only one works well, so I'm unable to help with the construction.

[erfan]

Hello dear Franco
I have been using your circuit for years and have had amazing results.
Now I have a question. As we know your circuit works in the FM frequency range. Do you think if we change this range to AM SW MW or etc.. will we still get reactions similar to the reaction of the device to precious metals?
i very much apreciate if you share your comment in detailed explanation (if possible) ofregarding of how the various radio frequencies work in your circuit.
Thank you.

[FrancoItaly]

Hello dear Franco
I have been using your circuit for years and have had amazing results.
Now I have a question. As we know your circuit works in the FM frequency range. Do you think if we change this range to AM SW MW or etc.. will we still get reactions similar to the reaction of the device to precious metals?
i very much apreciate if you share your comment in detailed explanation (if possible) ofregarding of how the various radio frequencies work in your circuit.
Thank you.

The only way to know is to try with different frequencies, several years ago I tried different values for L1/C10, L1 with 2 or 3 turns, C10 with 30 or 22 or 10 pF or nothing (only the parasitic capacitance of the B/ And of TR2), the result was more or less the same for all combinations, we are in the 80/120 MHz range.
Since several members on the forum ask about the performance in the field, could you list some of them?

[erfan]

Yes, dear Franco.
A bronze dagger 40 cm deep in the ground.
A silver bowl at a depth of 240 cm in the ground. Yes, 240 cm.
Two silver coins at a depth of 70 cm in the ground.
A volume of gold coins in a jar at a depth of 90 cm in the ground.

All findings are from 2017 to 2022.
All in the country of Iran. In the north of Iran.
.
.
And many other findings that are surprising in terms of the depth of burial in the ground. But if I say it, no one will believe it.
This profession is prohibited in Iran. The details of the research cannot be mentioned, but if you want, I will tell you in an email and you can transfer it here.
My English is not good. Forgive me

[Kazem]

Thank you for your patience in the answers, dear man

[Kazem]

Hello, dear teacher Irfan, I hope you are well. Are you still working with Asman border? If possible, give me a way to contact

[erfan]

Hi dear friend.
Yes, I always try to get the effect of the sky, but it is not absolutely necessary.
That is, if the effect of the sky is not detected in a certain place, if a valuable metal is buried there that has a long burial life, it will definitely be detected. You just need to reach the maximum sensitivity in the way of settings in that place.
This is an empirical value

[erfan]

Hi dear friend.
Yes, I always try to get the effect of the sky, but it is not absolutely necessary.
That is, if the effect of the sky is not detected in a certain place, if a valuable metal is buried there that has a long burial life, it will definitely be detected. You just need to reach the maximum sensitivity in the way of settings in that place.
This is an empirical value.

[Kazem]

Thank you dear Irfan

[erfan]

Thank you dear Irfan
thank you.
I replied to your private message

[Kazem]

تشکر میکنم

[Canozkaya]

thank you.
I replied to your private message

Do you have meil adress ?

[sweker]

hello Mr franco, I hope you doing well
I want to make an antenna for very low-frequency range from 20-100 hz
but i do not know, can you help me

[FrancoItaly]

hello Mr franco, I hope you doing well
I want to make an antenna for very low-frequency range from 20-100 hz
but i do not know, can you help me

I have already responded to you privately.

[FrancoItaly]

I post the original version of my lrl.

[Canozkaya]

I post the original version of my lrl.

thank you teacher 🌹

[Canozkaya]

Hi ionios

It is connect to collector Transistor TR4

Look this detail

Hello Nicolas, I want to try the Franco lrl circuit diagram, but I have a few questions that I want to do on the copper plate, can I ask, can you help me?

[FrancoItaly]

I post the original version of my lrl.

This is the entire lrl on a single pcb made by Dream Man, but I didn't make it, I still recommend a pcb just for the sensor stage.

[defineci35]

Hi FrancoItaly, I tried the circuit you made and got positive results, but I couldn't figure out the logic of the 8 Mhz crystal in the circuit. Would you mind explaining it?

[FrancoItaly]

Hi FrancoItaly, I tried the circuit you made and got positive results, but I couldn't figure out the logic of the 8 Mhz crystal in the circuit. Would you mind explaining it?

The 8 MHz signal serves as a reference for the mixer, to have a stable DC output even in the absence of the phenomenon, the maximum sensitivity is achieved with the 20 MHz oscillator and by adjusting L1/C10 on one of its harmonics to have the maximum signal. The 8 MHz oscillator has harmonics that are too small to use.

[defineci35]

thank you good work

[amir9297]

Welcome . They say in general metals reflect the electromagnetic beam and begin to resonate at the harmonic frequency only. For example, if a plate of gold is placed between two sheets of copper at the signal entrance of a highly sensitive electronic receiver, the plate of gold will prevent the signals from passing through and reflect them. In contrast, it will absorb and pass the harmonic signal. What do you think of this filter? I think the signal is treated like high frequencies, microwaves, similar in small capacitance. with a low pulse. Is there a comment.

Hello, Mr. Omar. I follow your content. Your ideas are great. Those who have a deep understanding of the phenomenon and its effects can understand your ideas. Your idea about molecular vibration is quite practical. There are many subjects in physics and electricity that are not taught properly and conceptually, if you research about making a plasma capacitor, you can make your desired sensor. In my opinion, the effect of the phenomenon is nuclear magnetic resonance of metals, which occurs in the earth due to triboelectricity.

[Frederick1986]

How many meters does it work?

[Frederick1986]

Hi dear friend.
Yes, I always try to get the effect of the sky, but it is not absolutely necessary.
That is, if the effect of the sky is not detected in a certain place, if a valuable metal is buried there that has a long burial life, it will definitely be detected. You just need to reach the maximum sensitivity in the way of settings in that place.
This is an empirical value.
How many meters does it work?

[Canozkaya]

This is the entire lrl on a single pcb made by Dream Man, but I didn't make it, I still recommend a pcb just for the sensor stage.

Let me give you some advice, I tried it and got positive results, make a frequency filter circuit at the antenna input, it works very well for discrimination.

[tasmen]

Let me give you some advice, I tried it and got positive results, make a frequency filter circuit at the antenna input, it works very well for discrimination.

Hi friend,
can you present it frequency filter circuit at the antenna input and its connection?

[UltraLRL]

Hi Dear Franco
In 20 MHz Version, you used LC circuit (C10 & L1) as antenna tuner. if we assume L1 roughly about 50nH (3 turn air core, 10mm Dia, 15 mm length) and C10 from 10pF to 100pF then the resonance of tune circuit will be somewhere between 71-225 MHz .

Resonance frequency supposed to be around 20MHz or I missed something...?

[UltraLRL]

Even if we assume L1 as two 100nH inductors in parallel (Equal to 50 nH), tank circuit goes from 50-160 MHz .
L1/2 and C9 forms a high-pass filter with cutoff frequency 21.268 MHz .

[FrancoItaly]

Even if we assume L1 as two 100nH inductors in parallel (Equal to 50 nH), tank circuit goes from 50-160 MHz .
L1/2 and C9 forms a high-pass filter with cutoff frequency 21.268 MHz .

L1/C10 is tuned to a 20 MHz harmonic, perhaps the fourth (80 MHz), or the fifth or sixth (100 MHz - 120 MHz).

[FrancoItaly]

L1/C10 is tuned to a 20 MHz harmonic, perhaps the fourth (80 MHz), or the fifth or sixth (100 MHz - 120 MHz).

Tuning L1/C10 to a 20 MHz harmonic increases the gain of the TR2 mixer, with the 8 MHz version the harmonics have too small an amplitude.

[UltraLRL]

Oh, you're right, I forgot about harmonics. so, tuning for 3rd or 5th harmonics are good value to start?

[FrancoItaly]

Oh, you're right, I forgot about harmonics. so, tuning for 3rd or 5th harmonics are good value to start?

Yes.

[Canozkaya]

Yes.

In the 8mhz LRL circuit, when L1 is wound 3 turns, the circuit does not work, but when you deactivate it, the circuit passes manual control, it does not work in the field, why does L1 not work when you wind it 3 turns?

[FrancoItaly]

In the 8mhz LRL circuit, when L1 is wound 3 turns, the circuit does not work, but when you deactivate it, the circuit passes manual control, it does not work in the field, why does L1 not work when you wind it 3 turns?

I tested L1 = 3 turns or 2 turns and C10 = 33 or 22 or 10 pF, or nothing, just the base/emitter parasitic capacitance of TR 2 and they all worked, without L1 it doesn't work, the test that is done without L1 is not valid.

[Canozkaya]

I tested L1 = 3 turns or 2 turns and C10 = 33 or 22 or 10 pF, or nothing, just the base/emitter parasitic capacitance of TR 2 and they all worked, without L1 it doesn't work, the test that is done without L1 is not valid.

Why does the device not work when L1 is connected to the circuit?

[omar]

Hello, Mr. Omar. I follow your content. Your ideas are great. Those who have a deep understanding of the phenomenon and its effects can understand your ideas. Your idea about molecular vibration is quite practical. There are many subjects in physics and electricity that are not taught properly and conceptually, if you research about making a plasma capacitor, you can make your desired sensor. In my opinion, the effect of the phenomenon is nuclear magnetic resonance of metals, which occurs in the earth due to triboelectricity.


Thank you, my friend Amir, and I appreciate your interest. I wish you success . I believe, according to my knowledge, that the phenomenon is strongest on the surface of the Earth, and it begins to weaken the farther away it is in the open air. The main cause of this phenomenon is pressure and heat. The deeper the metal, the stronger its signal. The spread of this beam in the open air depends on the temperature of the weather because the beam?s particles gain kinetic energy from the heat of the sun (the weather). Therefore, spread weakens in cold weather. The beam, like an electric current, to propagate requires a material medium or vacuum to travel, and it weakens and vanishes in open air. The best place to observe it is the surface of the Earth or close to the surface. Here, signal deviation arises due to the conductivity of the ground if there are obstacles above the target. Now why does gold give off the strongest aura among all metals? Simply put, gold is a metal with heavy atoms. It does not oxidize and has a long lifespan. This makes it in constant contact with the surroundings and stable in energy exchange. Unlike iron, for example, which oxidizes quickly, weakens its connection with the surroundings and energy exchange, and eventually decomposes into dust.

[erfan]

Please explain about this message. Explain the link you posted and the idea of this oscillator.
Thank you
https://web.archive.org/web/20060902001217/http://www.wenzel.com:80/pdffiles/xtalosc.pdf

[erfan]

FrancoItaly does your LRLs detect a spark from 1.5V AA battery to 60cm ?

Have tested your hef4046 PLL-LRL version almost whole day. Very strange behaviour. Very lot of time to tune only for gold target. When find a gold signal device auto-lock on target. All 30 diodes have lit. Changing direction of stylus-whip antenna to any other side from gold target does not change nothing, with locked signal phase approximately 5 seconds, than after that immediate disappear or lock-off. Pinpointing work not when top of antenna is above the target but when a lrl-man is above the target with his back. Any human bio-field or human aura near lrl-man up to 5 meters and of course not possibile to detect anything. human aura suck golden signal complete.

I need to say i tune with 7 variable at once.

P1 vishay potentiometer 100k - 20 turns for frequency. With 5P variable capacitance and very low inductance cover over GHz range. Phenomenon also depend from frequency and many other variables.
P2 -ii- -ii- 1k - 20 turns for sensitivity, tune the ammount of signal comes mix with gold signal to C10 560P and base of TR2 BC183C, with beta more than 700.
P3 -ii- -ii- 20k - 20 turns for signal threshold at non-inverting input of ic2a lm358
P4 - ii- -ii- 10k oscillator amplitude adjust between legs 3-4 and leg 9 with viper to the input of C3 3n3. I can tune output pulse amplitude in microvolts range. Checked with oscilloscope. TR1 BF240 with own beta less than 100. TR1 has no biasing resistor 100k or more to common conductor.
P5 - ii- -ii- 10k FSD potentiometer tuning full scale display for 30 led diodes.

C11 variable capacitor 5p to 145p from old japanese transistor radio receiver, instead fixed 22p ceramic capacitor. Fine tuning vith big plastic wheel for tuning same radio.

L1 coil 3 turns wire 1 mm in diameter, left winding or counter clock wise wounded over 10mm drill bit. Tuned by stretching and compressing coil lenght.

stylus-whip antenna 1m long tuned to variable lenghts with telescopy.

ps. gold tuning or other metal tuning is frequency phase dependent. :)

ps1. sparking battery associate me with very low energy photons above the long earthed gold due to influecne of telluric waves. on some strange ways gold make unheard flicker photon noise deep under noise floor of background ambient field. :)

check
http://www.longrangelocators.com/forums/attachment.php?attachmentid=18102&d=1349787850
http://www.longrangelocators.com/forums/attachment.php?attachmentid=18103&d=1349787873
http://www.longrangelocators.com/forums/showthread.php?t=18581

check
in magnetic closed loop antennas exist special longitudinal electric induction phenomenon according to wilbert smith and kyle klicker
http://www.tuks.nl/pdf/Reference_Material/Kyle%20Klicker%20-%20Motional%20Electric%20Fields%20associated%20wit h%20Relative%20moving%20Charge%20-%201986.pdf

check
http://www.treasurenet.com/forums/attachment.php?attachmentid=523479&d=1332451927
http://www.treasurenet.com/forums/long-range-locators/232832-discussion-various-possible-theories-may-applicable-lrls-11.html
http://www.buscadores-tesoros.com/t10792-tengo-mineoro-modificado-lo-png-o-a-sus-ordenes?highlight=mineoro

check
very low phase noise oscillator for your quartz version lrl for newer updated version .
http://web.archive.org/web/20060902001217/http://www.wenzel.com:80/pdffiles/xtalosc.pdf

Best regards
Dubulumach poor engineer and hungry for gold coins prospector :)

Please explain about this message. Explain the link you posted and the idea of this oscillator.
Thank you
https://web.archive.org/web/20060902001217/http://www.wenzel.com:80/pdffiles/xtalosc.pdf

[erfan]

Yes, too much amplification causes the compass effect, on the other hand I think the compass effect is part of what we call "phenomenon". The phenomenon "emerges" from that flow of energy that flows in the south / north direction, perhaps caused by the solar wind. If there is no phenomenon the flow is uniform and the lrl (which is immersed in this flow together with our body) reveals nothing. Currently I'm trying to understand if it is possible to reduce the compass effect, in this way it would be possible to increase the gain of the lrl. After all, it's the same thing you do with metal detectors where the effect of the ground is neutralized.

Hello to francoitaly and other friends in this forum.
My friend francoitaly, I draw your attention to this post of yours and I have a question.
According to your opinion that the compass effect is a part of this phenomenon, so receiving the polarization effect should not be a negative and unhelpful issue. So why are we trying to increase the sensitivity of the sensor part and receive the polarization effect and then reduce the sensitivity? to increase the sensitivity of the sensor part before receiving the polarization effect?

This is a contradiction!
Pay attention, if we assume that the polarization effect is a part of the effect of the phenomenon (which is like a natural cycle of buried metal effect + polarization effect + lrl + our body + the ground under our feet is flowing and moving), then we should not reduce the reception of the effect Let's try for polarization. We should try to get the polarization effect because the polarization effect is a part of the effect of the phenomenon.
Then, after receiving the polarization effect (which proves that there is a buried metal effect in that range), let's try to distinguish the polarization effect from the buried metal effect with the changes we give now.
Note that I don't mean to increase the sensitivity to such an extent that the lrl becomes a compass. Rather, I mean to increase the sensitivity in such a way that these currents parallel to the surface of the ground, which increase the constant voltage We receive and often identify long stretches.
We should not ignore the fact that we call this effect the polarizing effect only because it often flows in the direction of the north/south axis. Maybe in reality it is of another nature than what causes a compass to be sanctioned. That is, it cannot be with Kebitet said that because it is in the north/south direction, it must be the effect of the compass. Rather, it may be exactly a part of the effect of the buried metal phenomenon, which flows in the north/south direction because it is modulated by the magnitude of the earth's magnetic field.
When using a compass, we do not need to connect the body to the compass, and the compass works without connecting to anything.But your lrl is not like this and it must be related to our body and we know that our body is connected with the ground under our feet. That is, we know that if there is no connection between your lrl and our body and the ground under our feet, your lrl will become inactive or weak. noticed. So, what we call polarization effect can be a part of the buried metal effect itself, which is placed in the north/south direction. So we must first make changes so that your lrl receives the polarization effect with the best sensitivity, then follow it to When we reach the end of the effect, then we know that we are in the range where the effect of buried metal is located. Now we have to make changes to reduce the sensitivity of the sensor part in such a way that the polarization effect is not received and the effect of buried metal is received.

[FrancoItaly]

The compass effect exists even without the presence of the phenomenon, but it is detected by my lrl and this affects the reliability of the instrument, walking in the north/south direction you obtain a signal of constant amplitude (just like a compass) which can mask the presence of a target. I don't know any other way to eliminate this effect other than decreasing the sensitivity and this is not a flaw of the lrl, since it works anyway.

[akoja0090@gmail.com]

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[akoja0090@gmail.com]

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[erfan]

There is a simpler system, just build the two coils, oscillator and sensor stage, the same and check the output of the sensor stage (DC voltage). When the maximum value is obtained, it means that L1 / C10 is in resonance with the oscillator.

hello franco italy
I wish you health and happiness in the new year.
Please give a full explanation about this post yourself.
As we know, the complete matching and resonance of the input signal from the antenna with the oscillator signal can greatly help the performance of this circuit. How should we understand that this coordination between these two signals is established in the circuit?
You have made a small reference to this issue in this post. Please explain more and fully.
thank you

[FrancoItaly]

hello franco italy
I wish you health and happiness in the new year.
Please give a full explanation about this post yourself.
As we know, the complete matching and resonance of the input signal from the antenna with the oscillator signal can greatly help the performance of this circuit. How should we understand that this coordination between these two signals is established in the circuit?
You have made a small reference to this issue in this post. Please explain more and fully.
thank you

I'm sorry, but I don't remember that post. There are 2 20 MHz versions, the first with an extra transistor, the second similar to the original version, I said on the forum that I can't provide explanations because of the 3 examples built only one works correctly, so I couldn't help, given that not even I succeeded.
Regarding your request you just need to vary L/C until you get a point where the output increases and then decreases while continuing to vary L/C.

[erfan]

I'm sorry, but I don't remember that post. There are 2 20 MHz versions, the first with an extra transistor, the second similar to the original version, I said on the forum that I can't provide explanations because of the 3 examples built only one works correctly, so I couldn't help, given that not even I succeeded.
Regarding your request you just need to vary L/C until you get a point where the output increases and then decreases while continuing to vary L/C.



Thank you for your reply dear franco
Your post, which I quoted, is on page 104 of post number 2592.
Also, on page 102 of post #2535, you mentioned changing the L/C to match the 20 MHz harmonic oscillator.
What do you mean by this part that I have drawn in red?
There is only 1 coil, why did you say 2 coils? What do you mean by the second coil?

If my questions cause you pain and waste of time, I apologize. If you can guide me, good man

[FrancoItaly]

A few years have passed and I don't remember well, however there are 3 versions, the first, the original one at 8 MHz, the second at 20 MHz, with L/C tuned to a harmonic of 20 MHz, 80/100/120 MHz and the third with external oscillator and antenna, which oscillates on an L/C harmonic. However, the last 2 versions are very difficult to fine-tune and I don't feel like giving advice.

[erfan]

A few years have passed and I don't remember well, however there are 3 versions, the first, the original one at 8 MHz, the second at 20 MHz, with L/C tuned to a harmonic of 20 MHz, 80/100/120 MHz and the third with external oscillator and antenna, which oscillates on an L/C harmonic. However, the last 2 versions are very difficult to fine-tune and I don't feel like giving advice.


In these years that have passed since the beginning of this type, you have always answered everyone with generosity and magnanimity, and I always consider myself indebted to you.
I hope you will always be healthy and happy and God's hands will support you.
This type is a big leap in the history of LRLs in the last few decades. Without a doubt, the structure and nature of your LRL detection is the closest and most useful method for detecting buried precious metals. Without a doubt, I and anyone who can increase the distance in detection with LRL owes all this success to you.
May God always be with you great man

[FrancoItaly]

In these years that have passed since the beginning of this type, you have always answered everyone with generosity and magnanimity, and I always consider myself indebted to you.
I hope you will always be healthy and happy and God's hands will support you.
This type is a big leap in the history of LRLs in the last few decades. Without a doubt, the structure and nature of your LRL detection is the closest and most useful method for detecting buried precious metals. Without a doubt, I and anyone who can increase the distance in detection with LRL owes all this success to you.
May God always be with you great man

Thank you for the kind words, but there are other types of LRL, first of all that of Alonzo already in the 60s, mine is perhaps the simplest to build, there are no coils to wind and align and the antenna is very simple but the main advantage is that there are all the instructions to build it.

[sadaka]

buon giorno franco sono marco da perugia sto leggendomi tutto il post dall'inizio sono arrivato qui in merito ad un presunto tesoro sepolto nei terreni che possiede mio padre, complimenti per la pazienza e la sagacia scusa se ti disturbo ho fatto gli studi professionali e credo di poterlo realizzare anche io solo che trovo svariati schemi e foto lungo il post nella penultima pagina ci sono quellli piu' aggiornati credo, posso basarmi su quelli? intendo gli schemi di un certo dream_man che tu hai postato, ho visto varie versioni tre se non sbaglio ma tu dici che solo una funziona ? quella a 8 megaerz? e lo schema di dream_man e di quella versione? scusa le tante domande ma preferisco essere sicuro e non fartene altre fino alla realizzazione grazie infinite marco.

[FrancoItaly]

buon giorno franco sono marco da perugia sto leggendomi tutto il post dall'inizio sono arrivato qui in merito ad un presunto tesoro sepolto nei terreni che possiede mio padre, complimenti per la pazienza e la sagacia scusa se ti disturbo ho fatto gli studi professionali e credo di poterlo realizzare anche io solo che trovo svariati schemi e foto lungo il post nella penultima pagina ci sono quellli piu' aggiornati credo, posso basarmi su quelli? intendo gli schemi di un certo dream_man che tu hai postato, ho visto varie versioni tre se non sbaglio ma tu dici che solo una funziona ? quella a 8 megaerz? e lo schema di dream_man e di quella versione? scusa le tante domande ma preferisco essere sicuro e non fartene altre fino alla realizzazione grazie infinite marco.

Qui ? obbligatorio l'uso dell'inglese, ti rispondo con un messaggio privato.

[abdou2014]

Hello dear friend Franco, I have a problem with my LRL, when I reduce the sensitivity to remove the compass effect, and I start going up the mountain the compass effect will reappear , or I'm behind a hill and I go out into open air it will reappear ,
I'm sure it's a satellite I'm receiving, have you had this experience ? What did you do to avoid this reception, increase the frequency ?

Regards !

[FrancoItaly]

Hello dear friend Franco, I have a problem with my LRL, when I reduce the sensitivity to remove the compass effect, and I start going up the mountain the compass effect will reappear , or I'm behind a hill and I go out into open air it will reappear ,
I'm sure it's a satellite I'm receiving, have you had this experience ? What did you do to avoid this reception, increase the frequency ?

Regards !

The only explanation I can think of is that the compass effect probably doesn't have the same intensity everywhere, a bit like the ground effect for MDs. As for changing the frequency, I haven't tried it, but I haven't experimented with it for several years now.

[Rahman]

Hi Franco, my friend, should the selfie be horizontal or vertical, and the shield should be from inside the box

[FrancoItaly]

Hi Franco, my friend, should the selfie be horizontal or vertical, and the shield should be from inside the box

The shielding is not critical, the important thing is good electrical contact with the PCB ground and also the shielding of the handle.

[FrancoItaly]

I'm posting the material for building my lrl for a new forum member.

[seyyah33]

Complete pcb with antenna amplifier
You can assemble one coil or two coils
I assembled, Sense is better

Hello Mr. Arash, I managed to create the attached PCB and made it work, but I have difficulty in calibration. 5k pot, 20k and 500k, how should I adjust it, I would be grateful if you could help me, thank you in advance

[Kamal]

I'm posting the material for building my lrl for a new forum member.

Hello Mr. Franco, please give me the schematic circuit of 20 Hz Thank you

[FrancoItaly]

Hello Mr. Franco, please give me the schematic circuit of 20 Hz Thank you

As I have already stated previously, I am not giving help for this version, as out of the 3 lrls created only one works well, for the other two it does not.

[Kamal]

As I have already stated previously, I am not giving help for this version, as out of the 3 lrls created only one works well, for the other two it does not.

Thank you Mr. Franco
Which version works well?
What is a schematic?
Give me the schematic
Thank you for your love

[FrancoItaly]

Thank you Mr. Franco
Which version works well?
What is a schematic?
Give me the schematic
Thank you for your love

Display stage (one or three LEDs) is the same as the 8 MHz version. The most sensitive version is 20 MHz, because the L/C circuit is tuned to a harmonic of the quartz oscillator. In the version with three LEDs, the stabilized power supply must be added which is shown in the 1 LED version.

[Kamal]

Display stage (one or three LEDs) is the same as the 8 MHz version. The most sensitive version is 20 MHz, because the L/C circuit is tuned to a harmonic of the quartz oscillator. In the version with three LEDs, the stabilized power supply must be added which is shown in the 1 LED version.
Mr. Franco
Thank you

[Kamal]

Hi all
here is the video


https://www.youtube.com/watch?v=F1utYoRBidI

https://youtu.be/F1utYoRBidI
Hello Brother Please write the schematic of this device give me

[Kamal]

Display stage (one or three LEDs) is the same as the 8 MHz version. The most sensitive version is 20 MHz, because the L/C circuit is tuned to a harmonic of the quartz oscillator. In the version with three LEDs, the stabilized power supply must be added which is shown in the 1 LED version.
Dear Franco Which sensor should I use for this?

[FrancoItaly]

Dear Franco Which sensor should I use for this?


The 20 Mhz sensor stage is essentially the same as the 8 Mhz version, there are some more adjustments but this makes setup easier, I think you can use the 20 Mhz instead of the 8 Mhz.

[Kamal]

The 20 Mhz sensor stage is essentially the same as the 8 Mhz version, there are some more adjustments but this makes setup easier, I think you can use the 20 Mhz instead of the 8 Mhz.

Thank you

[seyyah33]

The 20 Mhz sensor stage is essentially the same as the 8 Mhz version, there are some more adjustments but this makes setup easier, I think you can use the 20 Mhz instead of the 8 Mhz.

Hello Mr Franco.
I completed the assembly of the 8mhz crystal version, but I could not operate it. The measurements I took with the crystal are as follows. Can you help me please.

TR1=B:8,0v E:9,2v C:15,6v

TR2=B:0,2v E:0v C:5,8v

TR3=B:0,8v E:2v C:7v

TR4=B:2,4v E:1,8v C:7,6v

TR5=B:0v E:0v C:16v

https://i.hizliresim.com/31wc6vw.jpg (https://hizliresim.com/31wc6vw)

[FrancoItaly]

My lrl is composed of the sensor stage + the display stage which also provides the stabilized 12V voltage, I attach the version with a LED which also includes the stabilizing part.

[okantex]

Hello Mr Franco
How are you, i hope you are well.
Lrl works with N/S magnetic..ok.
Does it also work through sky effect?
What does sky effect mean for you.
Mixture of locally propageted /available frequencies on the Air?
İf so, can we say that...if our Total antenna reciever is tuned to any of local frequencies ,we will have sky effect Upon elebvating tip of antenna up. İf there is no match to a frequency ,we wont have sky effect..
Can we think in this way , to Check if our lrl is tuned correctly or not?
İn a away ,Franco lrl is a passive reciever like pdk4..pdk is working on frequency matching condition
So, what about Franco?
Francolrl seems like wide band reciver.. residue of any frequency available or mix of them ,will cause increase in receipt Signal. Think like passengers on carrier wagoon..
Just trying to have brain storming of occurance of unknown phenomon

[FrancoItaly]

Hello Mr Franco
How are you, i hope you are well.
Lrl works with N/S magnetic..ok.
Does it also work through sky effect?
What does sky effect mean for you.
Mixture of locally propageted /available frequencies on the Air?
İf so, can we say that...if our Total antenna reciever is tuned to any of local frequencies ,we will have sky effect Upon elebvating tip of antenna up. İf there is no match to a frequency ,we wont have sky effect..
Can we think in this way , to Check if our lrl is tuned correctly or not?
İn a away ,Franco lrl is a passive reciever like pdk4..pdk is working on frequency matching condition
So, what about Franco?
Francolrl seems like wide band reciver.. residue of any frequency available or mix of them ,will cause increase in receipt Signal. Think like passengers on carrier wagoon..
Just trying to have brain storming of occurance of unknown phenomon


The phenomenon is very complex, as far as my lrl is concerned the sky effect and the compass effect are eliminated by decreasing the gain. The TR2 mixer has an output, even in the absence of a signal (this is intentional). Any signal that passes the L1/C10 filter modifies the mixer output, so even a signal out of range but very strong (as you said correctly).

[Kamal]

hello , mr franco .
how to make the antenna sensitive
8 mhz circuit

[Kamal]

The phenomenon is very complex, as far as my lrl is concerned the sky effect and the compass effect are eliminated by decreasing the gain. The TR2 mixer has an output, even in the absence of a signal (this is intentional). Any signal that passes the L1/C10 filter modifies the mixer output, so even a signal out of range but very strong (as you said correctly).
hello , mr franco .
how to make the antenna sensitive
8 mhz circuit

[Kamal]

The 20 Mhz sensor stage is essentially the same as the 8 Mhz version, there are some more adjustments but this makes setup easier, I think you can use the 20 Mhz instead of the 8 Mhz.

hello , mr franco .
how to make the antenna sensitive
8 mhz circuit

[FrancoItaly]

hello , mr franco .
how to make the antenna sensitive
8 mhz circuit

you can try this antenna amplifier suggested by a forum member, the sensitivity increases slightly, at least in my tests. However, the antenna is the same for the 8Mhz and 20Mhz versions.

[okantex]

Hello Mr Franco , Omar
Can you tell the condition of sensing sky effect.
What is sky effect .how do we test it
İn my circuit.
At home ,while elevating antenna. Signal goes to max(3leds). But outside of home..no increase .
At home i can not test north south effect.
But outside... At north..45right /45left degree..and same at south .. 1 LED blinks slightly..

[FrancoItaly]

Hello Mr Franco , Omar
Can you tell the condition of sensing sky effect.
What is sky effect .how do we test it
İn my circuit.
At home ,while elevating antenna. Signal goes to max(3leds). But outside of home..no increase .
At home i can not test north south effect.
But outside... At north..45right /45left degree..and same at south .. 1 LED blinks slightly..

The sky effect and compass effect are only noticeable outside and appear when there is too much amplification, inside there is too much electromagnetic disturbance.

[okantex]

Mr Franco
for the message 3125
you are saying in all formations(L1 C10 options) reception of antenna is in 80/120mhz
I would like to ask.. when you are outside.. and when you elevate antenna stick to sky 90 degree..does your first led or all starts giving lights..and buzzer beep?

at outside even adjusting all pots for max values.. ( I have 2 bobin version with12mhz lm3914 10 leds..) just see 3/4 leds..nothing changes while elevating antenna up..can not see sky effect.
with this setup..I have pointed few places with 6 to10 leds..
not all pots are not max.. in north direction..I am calibrating with first led and sink it..then I can searh in north south directiion...
even at my pointed targets with 6-10 leds on.. I can not get signal from east or west..
I feel that I am not recieving in FM range..if I were .... whereever I elevate antanna up. , I have to see radio waves..
without antenna input. my tr5 output.. or 358 input.. is around 5 volts

I would like to have comments of you , and Erfan and Omar
thanks for advices

I think we are traching by reclections of north south.......compass effect...magnetic lines of earth..,and for other all directions.. reflections of available RF propagations...mostly

I feel I am just receiving ghz of wifi at building..

one another poing.. I am using battery 12V instead of 2x9Vcells.
I am not using regulator...
when I am touching to battary signal is decreasing.. as you touch to antenna..

you have advised to use secondary cooper not etched..as screen. and do connection to GND from screen.. if I am wrong for give me... for aluminium boxes.. do connection to box from gnd.. also use aluminium Rod and connect to gnd..
I am testing it by touching to GND of battery.. it is same..I think..
results signal sinks..

[omar]

Hello,

I made two versions of the Franco device a long time ago, the 8 MHz version... one with a BC547 transistor that does not sense the sky, and the second with a BC173 transistor. It was good according to the required specifications and senses the sky...

and I remember that one of the problems I found in the real field was the need to reset the threshold frequently because Rapid sensitivity collapse. Also, the signal is not fixed at the same point at all times. The thing that I did not really know is that the signal depends on the surrounding conditions, place and time....

I advise strict adherence to Franco?s scheme as it is, without more or less. Three LEDs are sufficient to track and know the level of the signal. Using additional accessories that may cause confusion for the user....

For example,,,, I have done By adding a protection diode to Franco's circuit, and when I simulated the circuit, this diode caused sensitivity problems. Using regular batteries is better than lithium or acid charging batteries because of the voltage noise...

and also self-oscillation. I noticed it with several sensitive receiving circuits. Why it happens I do not know definitively, although you use the same parts on the breadboard once you succeed with no self-oscillation and the same parts return. Assembling it again, you find it suffers from self-oscillation. Using ceramic capacitors is better because of their faster signal interruption and small capacitance.

Stable operating voltage in such sensitive circuits (very, very important). The use of a voltage regulator is mandatory, to stabilize circuit operation and sensitivity.

[okantex]

When there was 7812 with 12v acid battery.
There Signal at display stage .even sens?r stage was Stable alone. İ deteched stages..but could not lose osilation. İ could let it work after detaching 7812..
Btw, i am also using protection diode at positive entrance..i frequently do wrong connection and burn circuit.
İs not protection a kime of regulator for supply line

Now i do not have osilation..and circuit is Stable.
But it detects me from battery.
But my observation is that..if we dongnd )shild/holder connections...webare decreasing signal.

[FrancoItaly]

Unfortunately, it's been several years since I did research and tests with my lrl and I don't remember all the details that are asked of me, very important is the voltage of the lrl power supply, the 7812 requires at least 15V to work correctly, I recommend 18V power supply and calibrate the control led to light up with 15.5V. Regarding the sky effect and the compass effect they are due to excessive amplification so the only remedy is to lower it. In my country, I can not vouch for the others, the greatest sensitivity is proceeding from north to south, the minimum from south to north and an intermediate value east/west and west/east. Regarding the stability of the sensor stage output I have never had problems. I invite other members who have built my lrl to express their opinion.

[okantex]

İ do agree with working conditions if 7812.
With acid battery ..it gives 10.5v
But even with 18v supply...will give 12v
How to calibrate LED with 15.5V?
Circuit will be working with 12v

Outside..at field..i can not see sky effect.
And at the pointer Target..even getting singal 15m north..6m south...i can not get Signal from West or east even over the Target.
Any comments

[FrancoItaly]

R1 in the power/display (1 led) stage is connected to +18V and together with R2 forms a voltage divider that halves the voltage of 18V.

[Kamal]

hello to everyone
does the effect of the sky interfere with the circuit

[Kamal]

my design

[Kamal]

hello , mr franco , i have a health wish for you .

is the effect of the sky . it 's okay no

[Kamal]

mr franco
shall we remove the predecessor ?

[FrancoItaly]

The coil is always the same.

[osman34]

Hello Mr. Franco. First of all, thank you very much. I need help with something? I tried to transfer your circuit. When voltage is applied, the yellow LED lights up and then goes out immediately. I can't see anything between the antenna and ground. I used BC183C LM358P 500k POT. Where exactly would the control points be?

[osman34]

.

[FrancoItaly]

Hello Mr. Franco. First of all, thank you very much. I need help with something? I tried to transfer your circuit. When voltage is applied, the yellow LED lights up and then goes out immediately. I can't see anything between the antenna and ground. I used BC183C LM358P 500k POT. Where exactly would the control points be?

The measurement to be made is at the output of the sensor stage R16/C18 (DC voltage) the other (1 LED) is out IC3A or (3 LEDs) out IC1A. in the new version with two tuning potentiometers it is still IC1A. 2 potentiometers allow for more precise tuning, furthermore the gain can be adjusted.

[osman34]

Is there a problem with the image?

[FrancoItaly]

I can't understand what you want to know. I can't tell you if your assembly is correct. First you need to calibrate the sensor stage to have a stable output, between 2V and 5V. Usually the instability is due to too much amplification. I recommend a double-sided pcb for the sensor stage, with the bottom connected to ground and another pcb, not critical, for power and display stage.

[kiro077]

Hello Mr. Franco. I need help please. The output voltage is 5.63V. When I touch the antenna the first LED turns off and the voltage drops. The transistors are BC550C with a gain of over 500. The problem is that I cannot get the effect of the compass and the sky.

[kiro077]

This is an 8 MHz version with 3 LEDs

[FrancoItaly]

This is an 8 MHz version with 3 LEDs

Compass effect and sky effect are unwanted effects, they appear if the sensor stage gain is too high, so the only remedy is to decrease it. If your lrl does not have this defect and the sensitivity to metals is good there is no problem. Of course I assume that you have calibrated the sensor stage to the limit of self oscillation.

[kiro077]

The problem is that on a test field it does not react to long-buried metal. Could you tell me how to calibrate the sensor stage to the self-oscillation limit.

[FrancoItaly]

The problem is that on a test field it does not react to long-buried metal. Could you tell me how to calibrate the sensor stage to the self-oscillation limit.

Do you have a field with metal buried for at least 2 months?

[omar]

Is there a problem with the image?


Yes, my friend Othman, there is a problem. Correct the location of the 33 nano capacitor connected to the 4148 signal correction diodes...


Note: Try the device with or without the protection diode on the voltage input and choose the best.

[kiro077]

Yes, the buried metals are over 7 years old. Where could the problem be? After all, the best test for the correct operation of lrl is to touch it with your hand and reduce the tension. Will you help me to make the new display with 3 potentiometers.

[kiro077]

Hello Mr. Franco. I need help, please. On a field with buried metal at 7 years old, there is no reaction. The antenna is spread over 90 centimeters and Gain at maximum gain. I can't get compass effect. What should I do?

[FrancoItaly]

Hello Mr. Franco. I need help, please. On a field with buried metal at 7 years old, there is no reaction. The antenna is spread over 90 centimeters and Gain at maximum gain. I can't get compass effect. What should I do?

Did you calibrate to have maximum gain but without self oscillation? Did you read the helps.txt I attached? The maximum sensitivity is walking from north to south, from west to east and vice versa is medium and from south to north is minimum, the signal increases as you get closer to the target, also above the target the signal is cancelled.

[kiro077]

Здравейте г-н Франко. Всичко съм изпълнил както е написано в helps. txt.
Изходното напрежение е 5.63V. Когато докосна антената, първият светодиод изгасва и напрежението пада. Ще ми помогне ли на усилването, ако направя дисплея с 3 потенциометъра или добавя
антенния усилвател?

[kiro077]

Hello Mr. Franco. I have done everything as written in the helps. txt.
The output voltage is 5.63V. When I touch the antenna, the first LED goes out and the voltage drops. Will it help my gain if I make a 3 potentiometer display or add
antenna amplifier?

[FrancoItaly]

Hello Mr. Franco. I have done everything as written in the helps. txt.
The output voltage is 5.63V. When I touch the antenna, the first LED goes out and the voltage drops. Will it help my gain if I make a 3 potentiometer display or add
antenna amplifier?

What values ​​did you use for C2-C3-C4-C13-C14? Did you use a pcb only for the sensor stage? If you use a single pcb for the entire lrl, it may happen that the sensor stage starts to self oscillate with a lower gain, compared to the version with two pcbs. The antenna amplifier can be useful.

[kiro077]

For C2-C3-C3 I used the parasitic capacitance of the board. For C13-C14 (470pf). I use one printed circuit board for the whole lrl.

[FrancoItaly]

For C2-C3-C3 I used the parasitic capacitance of the board. For C13-C14 (470pf). I use one printed circuit board for the whole lrl.

As I told you, a PCB just for the sensor stage, with the bottom face connected to ground, makes a higher gain possible.

[FrancoItaly]

As I told you, a PCB just for the sensor stage, with the bottom face connected to ground, makes a higher gain possible.

If there are many electromagnetic disturbances inside the house it is better to calibrate outside, also remember that the antenna must be connected during these operations, I recommend extending it to about 40cm.

[kiro077]

If I shield the box, will it get more amplification?

[FrancoItaly]

If I shield the box, will it get more amplification?

it is possible, in fact the body participates in the detection process, holding it with two hands the gain increases compared to holding it with just one hand, furthermore the lrl remains less sensitive to disturbances, it must be shielded (with aluminium foil, including the handle).

[osman34]

Yes, my friend Othman, there is a problem. Correct the location of the 33 nano capacitor connected to the 4148 signal correction diodes...


Note: Try the device with or without the protection diode on the voltage input and choose the best.

Merhaba Omer, I disabled the diode. I made a direct connection. How should I correct the positions of the 33 nano capacities?

[omar]

https://a.top4top.io/p_3138l8vhz0.jpg (https://top4top.io/)

[FrancoItaly]

https://a.top4top.io/p_3138l8vhz0.jpg (https://top4top.io/)

Both diodes are needed, they constitute a full wave rectifier, since silicon diodes have a conduction threshold of about 0.7V and signals lower than this threshold are blocked. However, this is not a problem since the signals are of higher amplitude.

[osman34]

Omer, first of all, thank you. I corrected the mistake I made. I am operating it with DC 18V supply, the buzzer is constantly beeping. The adjustable resistor only lights up the first Yellow LED and then the Blue LED. The Green LED close to the 7812 Regulator does not light up at all. I need to pay a little more attention.

[osman34]

Omer, first of all thank you. I have corrected the mistake I made. I am operating it with DC 18V supply, the buzzer is beeping continuously. The adjustable resistance only lights up the first Yellow LED, then the Blue LED and the Green LED. When I touch the antenna point I do not get any response. Do you have any idea where I should check? .

[okantex]

Dear osman34
How is istanbul?

Probably you have problem with your second lm358
Since first LED works, you should have Signal at entrance leg3 of second lm358. But both leds are not works..seems problem is on lm358.
Maybe burned..or maybe miss connection..check solderimg.

[mc_307]

Hello Mr. Franko. I have a question about the settings of c13, c14 and c2-3-4. First we remove the crystal. Then we decrease the value of c13 until the emitter Tr3 oscillates. We increase the value of c13 a little and leave it like that and it does not oscillate. Do we also need to measure the emitter Tr4 for C14? After adjusting c13 and c14 we measure the emitter Tr5 and adjust the voltage from c234.

[FrancoItaly]

All measurements are made on the TR5 emitter and are a continuous voltage. Increasing C13/C14 increases the gain, therefore the output voltage, to avoid self oscillation you must decrease C13/C14. C2/C3/C4 are only used to fix the output voltage to a correct value.

[mc_307]

All measurements are made on the TR5 emitter and are a continuous voltage. Increasing C13/C14 increases the gain, therefore the output voltage, to avoid self oscillation you must decrease C13/C14. C2/C3/C4 are only used to fix the output voltage to a correct value.
This is where things get difficult. For example, does the value of c13 affect the value of c14? If so, how much we need to change c13 or 14 remains unclear.

[FrancoItaly]

You can change only C13 first, if the value (greater than 10nF) is not enough also increase C14. Otherwise (if acting on C13/C14 is not enough) vary R10/R12, decreasing the value increases the gain. R10/C13 and R12/C14 are two high pass filters. In a later version of the lrl I put two trimmers in place of R10/R12.

[walkman]

Thank you very much for your guidance Mr. Franco.
It detects the lighter test very easily with a distance of 4m and a 20cm long antenna. I haven't been able to do a field test outside yet.

[electroaf]

good evening I am a new researcher in the LRL field I like your project I want to build this LRL but I want to know what is the resonance frequency of the system

[FrancoItaly]

My lrl is of the passive type as I think almost all the others are. The internal oscillator is only used to provide a reference signal, the reception frequency is determined by L1/C10 and is in the range of about 90/120Mhz. The most sensitive type is the one where L1/C10 is tuned to a harmonic of the quartz oscillator, the quartz frequency is 20Mhz but it is quite critical to realize. Of 3 20Mhz lrls made by me only one works well. I must warn that it is not easy to set up my lrl (even 8Mhz version) because of the very high gain it could easily self oscillate, if the gain is reduced too much it would be too insensitive, I recommend a single pcb for the sensor stage, of the double-sided type, with the lower face connected to ground and therefore with the components soldered on the upper part, without drilling the pcb.

[FrancoItaly]

My lrl was originally a self-oscillating rf sniffer that also worked as an lrl. Since it was critical to make, I added a quartz oscillator. For those making the 3-led version, I say to use the power supply stage of the 1-led version (in fact, it is not shown in the diagram). Power is provided by two 9V batteries in series.

[mc_307]

hello mr. franko. what happens if the value of the c10 capacitor is close to zero? can you give an example about changing the value of the c9 and c10 capacitors here? for example, what happens if the value of c9 is decreased? or what happens if it is increased. the same questions apply to c10. i wonder how the c9 and c10 capacitors affect each other. it is buried but i don't know what is inside, when the c10 capacitor is very low, i can only detect it when it is on it and from one direction. i want to increase this low value. does it make sense to change the value of the c9 capacitor for this?

[FrancoItaly]

Changing C9 is not needed, it serves to connect the filter to the TR2 base and its impedance to the frequency of the filter is very low, negligible. C10 determines the filter resonance frequency together with L1, put a variable capacitor (10/47pf) in place. If you do not put C10, however, the parasitic capacity of the basic/emitting junction of TR2 (about 7pf) remains.

[mc_307]

Hello Mr. Franko. I receive signals from 2 different places underground. One of them receives only in the west direction and slightly turned to the south. The other receives from almost 4 directions. However, it only detects when I come to it. There is no remote sensing. Do you have any advice regarding the remote sensing of the device? Which parts on the circuit are related to the remote sensing distance?

[FrancoItaly]

My lrl, like the others (except for modified metal detectors like Alonzo's pistol), works only as remote sensing and for metals buried for a long time. Anomalies in detection can depend on the type of soil, metal, burial time. We know little about the phenomenon that according to official science does not exist. The advice I can give is to do tests in the test field and try to understand how it works.

[abdou2014]

Hi Dear Franco , I hope you are well, I managed to find a lot of non-ferrous metals underground with your LRL, and I tried to increase the location distance by increasing the sensitivity, except that there is the effect of the sky and compass which is imposed,
Do you have a precise idea about the sky effect? ​​What exactly is it ?

[FrancoItaly]

I can't give you an answer, we know very little about the phenomenon, regarding the compass effect the Earth's magnetic field is undoubtedly important and for the sky the effect could be due to the electrostatic potential which increases as the height from the ground increases.