Lrl from Italy

[FrancoItaly]

In my country it is said that there are none so deaf as those who will not hear. As I have said many times I have no economic interest or otherwise in this project. I believe that the purpose of this forum is to share ideas and projects. This LRL derived from an RF sniffer that went into self-oscillation. I realized that it was acting as a LRL and then I improved by adding one oscillator stage and eliminating the self-oscillation, too critical to be realized. By members of this forum I expect constructive criticism, that is, "I have made your LRL but I can not make it work," or "in the laboratory all the tests are positive, but on the ground gives no signal." All such members have always responded, often privately, but I will not answer who denies the operation in advance without having built the LRL. Fortunately there are several members who were able to see that my LRL really works and that have already confirmed.

[liudengyuand]

You lie to people around the world, but you again not being lied to, because the video is not on the reaction of the metal, the somebody else lied to you also believe that

[zakari]

You lie to people around the world, but you again not being lied to, because the video is not on the reaction of the metal, the somebody else lied to you also believe that

hi liudengyuand

i dont understand what's your problem

i ask you:is other lrl(pd,gold gun,...) working every where of the world.

absolutely not

this man share his lrl and support members for three years
i say this lrl working only you must adjust L and c10 for your local area

i suggest you look at iranian felezjoo forums

they have developed this lrl very good

i can only say:thank you very much MR FRANCO;););)

[Nicolas]

In my country it is said that there are none so deaf as those who will not hear. As I have said many times I have no economic interest or otherwise in this project. I believe that the purpose of this forum is to share ideas and projects. This LRL derived from an RF sniffer that went into self-oscillation. I realized that it was acting as a LRL and then I improved by adding one oscillator stage and eliminating the self-oscillation, too critical to be realized. By members of this forum I expect constructive criticism, that is, "I have made your LRL but I can not make it work," or "in the laboratory all the tests are positive, but on the ground gives no signal." All such members have always responded, often privately, but I will not answer who denies the operation in advance without having built the LRL. Fortunately there are several members who were able to see that my LRL really works and that have already confirmed.

Yo are totally right
Thank you FrancoItaly
and this is your LRL and work well.

Thank you so much for this project

[Nicolas]

Thank you Franco

[FrancoItaly]

Hi Nicolas and Zakari,

thanks for your words.

[ouiarabe]

liudengyuand ,Mike(Mont)

Tell us what is your problem we and Mr franco we want to waste our time, we are off topic and from another planet what is your problem ??
Finally, tell us how many cents you receive from companies that produce garbage and not metal detectors.
Mr FrancoItaly ,
thank you so much

[WM6]

Hi Morgan

I'm convinced that all the Lrl are passive receiver and they reveal only near oneself. My Lrl reveals change in internal oscillation by stylus antenna as input and your lrl reveals change in an external field at 77Khz (I suppose for radiocontrolled clocks) that is "modulated" by the phenomenon. For that are possible many solutions to build a Lrl and the key to boost a Lrl it would be to amplify directly the phenomenon.

Best Regards

Yes. Big question is, what in fact such phenomenon is.

Is it self-deception or self-illusion or both?

[Mike(Mont)]

liudengyuand ,Mike(Mont)

Tell us what is your problem we and Mr franco we want to waste our time, we are off topic and from another planet what is your problem ??
Finally, tell us how many cents you receive from companies that produce garbage and not metal detectors.
Mr FrancoItaly ,
thank you so much

I beg your pardon. I have nothing against FrancoItaly. Yeah, I WISH I was getting some money from anybody right now. Not the case. Never has been. All I can say is this is some misunderstanding on your part. Yes, I voiced my opinion that I don't think the Pistol type locators are right. i don't harass anyone over it and i don't like to see other people being harassed. that's why i made the posts. As I said, no one listens anyway. Have a good day.

As for the TOTeM, I have tried to find some salvation for this doomed project. Nobody will respond to my posts. Yeah, I guess I did say don't waste your time on trying to fix it. Really, most of these projects have some similarity to the Gold Gun. At least from the passive mode. I don't evn know much about the newer model, think there is a transmitter, but don't recall ever seeing it. If you recall a while back i posted about using an SID receiver. I even built a large receiver coil. I'm pretty much inept in the electronics knowledge. Probably would have worked with the right filters. I don't know.
:D

[ouiarabe]

I beg your pardon. I have nothing against FrancoItaly. Yeah, I WISH I was getting some money from anybody right now. Not the case. Never has been. All I can say is this is some misunderstanding on your part. Yes, I voiced my opinion that I don't think the Pistol type locators are right. i don't harass anyone over it and i don't like to see other people being harassed. that's why i made the posts. As I said, no one listens anyway. Have a good day.

As for the TOTeM, I have tried to find some salvation for this doomed project. Nobody will respond to my posts. Yeah, I guess I did say don't waste your time on trying to fix it. Really, most of these projects have some similarity to the Gold Gun. At least from the passive mode. I don't evn know much about the newer model, think there is a transmitter, but don't recall ever seeing it. If you recall a while back i posted about using an SID receiver. I even built a large receiver coil. I'm pretty much inept in the electronics knowledge. Probably would have worked with the right filters. I don't know.
:D


Hello

First please excuse me for being a hard one with you.
Concerning the subject of the gold locator you must know that the majority of the devices are similar and that most of the schemas in the various forums are basic prinsipes because each has its little secret. The only ones who did not hide anything are Mr Nicolas and Mr FrancoItaly the problem is that we must make changes from one region to another and if you do not achieve a good result it's that, You probably miss something.
The predicted that other people have managed to find the right setup.
Finally Mr FrancoItaly did not oblige anyone to build his GDG
cordially

[zakari]

You lie to people around the world, but you again not being lied to, because the video is not on the reaction of the metal, the somebody else lied to you also believe that

hi liudengyuand

please excuse me .you are right .you are very very right:shrug::shrug::shrug:!!!!!!!!

because .....

you are seller metal detector in the chaina and franco'lrl has destroyed your markting:D:D:D:lol::lol::lol::barf:

every body can build franco'lrl with less than 30 dollars no need spend more:D:D:D:D

[liudengyuand]

Do I have to tell a lie it useful, let more people around the world is a waste of time energy and money? He himself never tried, he couldn't speak the principle, do you think useful? If you feel useful, you can continue to play, who said useful, are deceptive selling machine, excuses is to long buried metal is useful, so let people can not experiment on the spot, this is a liar, I continue to reiterate here, don't believe the techniques of deception,

[WM6]

Do I have to tell a lie it useful, let more people around the world is a waste of time energy and money? He himself never tried, he couldn't speak the principle, do you think useful? If you feel useful, you can continue to play, who said useful, are deceptive selling machine, excuses is to long buried metal is useful, so let people can not experiment on the spot, this is a liar, I continue to reiterate here, don't believe the techniques of deception,

Hi liudengyuand

Please, do not write long sentences in your native language, cause your "Google Translate" is not able to translate it in proper way.

Write only short sentences in your native language and as much grammatically correct as you can.

This way translation will be much better.

[zakari]

I beg your pardon. I have nothing against FrancoItaly. Yeah, I WISH I was getting some money from anybody right now. Not the case. Never has been. All I can say is this is some misunderstanding on your part. Yes, I voiced my opinion that I don't think the Pistol type locators are right. i don't harass anyone over it and i don't like to see other people being harassed. that's why i made the posts. As I said, no one listens anyway. Have a good day.

As for the TOTeM, I have tried to find some salvation for this doomed project. Nobody will respond to my posts. Yeah, I guess I did say don't waste your time on trying to fix it. Really, most of these projects have some similarity to the Gold Gun. At least from the passive mode. I don't evn know much about the newer model, think there is a transmitter, but don't recall ever seeing it. If you recall a while back i posted about using an SID receiver. I even built a large receiver coil. I'm pretty much inept in the electronics knowledge. Probably would have worked with the right filters. I don't know.
:D

hi mike

i am thinking the right filter is very important because frequence resonanse of gold barried is different in the world and it depend on the many factors
for example in the franco's country(italy) is around 135mhz but at the middle east is about 95 mhz
may be these are the harmony of the main gold frequence i dont know

this is important you adjust lc filter for your area

[Mike(Mont)]

I'll start another thread "Phenomena"

[zakari]

hi dear franco

can you explain air core diameter(L)

10mm is id or od ?



best regard

[FrancoItaly]

hi dear franco

can you explain air core diameter(L)

10mm is id or od ?



best regard



diameter is no critic, 9mm-10mm-11mm are all ok, then internal or external diameter is of little importance.

[zakari]

diameter is no critic, 9mm-10mm-11mm are all ok, then internal or external diameter is of little importance.anco

thank you so much mr fr

[mokkethon80]

😁nice job guy

[liudengyuand]

All silent, don't are successful?

[zakari]

;););););)

[elvoney]

Franco thanks for the project and would like to know what the purpose of the leds or when they light up what they are indicating?

[FrancoItaly]

When the leds light up they indicate the presence of a target, during normal operation, the threshold should be adjusted so that all LEDs are off.

[elvoney]

Thank you Franco and thank you again for this work and be shared in the group. We await other inventions.

[liudengyuand]

Many times to persuade you don't believe that waste time and energy

[elvoney]

liudengyuand, I AM SELLING YOU AGAINST THIS FRANCOITALY DESIGN. DO YOU KNOW ANY LRL DEVICE THAT REALLY WORKS IN YOUR OPINION?

[WM6]

liudengyuand, I AM SELLING YOU AGAINST THIS FRANCOITALY DESIGN.



It is against law to sell people for some sort of design.

[elvoney]

The translation is bad but it would be "looking at LIUDENGYUAND's answers about the Francoitaly project. I asked if he has any lrl project that really works.

[zakari]

hi all
how are you mr franco?
what's solution for inverse mode
when i touch the antenna out put voltage increase


best regards

[FrancoItaly]

I think it is not important, it's already happened to me. The important thing is that there is a variation in the DC signal. However, the really important thing is the field test.

Best Regards

[zakari]

thank you so much

[folharin]

mr franco...No, you relied on 8mhz?

[folharin]

Most of the group as well as esteban believe in 60khz up to 70 khz

[folharin]

because you 8 mhz?

[FrancoItaly]

the internal oscillator oscillates at 8MHz but this signal is not transmitted, the signal received by the antenna is of the order of about 100Mhz, my rl is a passive receiver. I think that the frequency of the "phenomenon" is in the range 60kHz - 100Mhz- infrared, so you can build lrls that work in this range, but in any case I think it is always passive receivers and the oscillator signal (60kHz in Alonzo pistol) serves only to provide a stable signal "background", in fact, Esteban said that the LRL could also work with the oscillator off.

[LRLMAN]

the phenomenon has a very wide frequency range, it comes to finding the most suitable, then L1 / c10 must be varied to have the most large signal (DC output). More could not tell you.

Hello Friend Franco, My Lrl by franco 8 mhz cristal quarts only detect iron...... What values should I change in L1 and C10 so that it can detect metals such as gold and silver or some other conductive metal? .... there is a place that is overcrowded with copper metal and I have gone to prospect and I have taken out a lot of copper metal But I can not detect copper buried with the Lrl by Franco what can I do ???

Here a coper bar that i found in the place that i coment here.....

Lrlman.

[LRLMAN]

the image i can upload

[FrancoItaly]

I do not see the picture, however in my experience varying L1 / C10 changes little, that is, with L1 = 2 or 3 turns and C10 = 10pF or 22pF the result does not change, outside of these values, the LRL is not working. It is not possible that the LRL is sensitive to iron. You should bury a piece of silverware (some coins or a bracelet, or even cutlery) 20cm deep and wait a few months, then you can try the LRL. Keep in mind that the LRL must be calibrated for maximum sensitivity before it goes into self-oscillation and which is sensitive to the compass effect. I place again here an aid to tuning.

Regards

[folharin]

:cheers:
https://www.youtube.com/watch?v=8lRq37udd_M Test field with a silver coin and 2 gold rings buried within a year and a half

[folharin]

But this lrl has a problem, it detects about wire

[Mohlrl]

hi dear Faranco, thank you for your efforts and helps,i made your lrl with bc549c tr with 570 hfe, my lrl work well in house. this movie is reaction of my tools to phone.
http://uploadboy.me/t95ozw3d5p4c/video_2017-03-07_02-12-26.mov.html
one of my friend detect one very old Copper plat (Ancient with small size) from range 8 meter and depth 40 cm (it is noticeable that i live in iran). with lrl detected this metal with one led. i want to increase sensitive of lrl to detect with 2 or 3 led. i thought maybe if i use one MPSA18 tr with beta 840 and noise figure 2.5 (but bandwidth 100 MHz), the result will be better. otherwise some of friend offer to me to increase capacitor c9 to 1 nf so that it will increase sensitive. what do you think about this? I will be thankful if you help me and express your opinion about this. :)

[FrancoItaly]

If you've been following my "helps" you have adjusted the LRL for maximum sensitivity. The maximum sensitivity is achieved by adjusting the gain a little before starting the self-oscillation and the compass effect. Stretching the antenna from 30 to 60 or 70cm you get an increase in sensitivity but it can appear the compass effect. As for the transistors you can try to change it but I do not think there will be an improvement. However 8 meters is quite a distance and it is normal that turns on only one LED. As I have already said several times the test with the phone is not very reliable.

Best Regards

[Mohlrl]

thank you very mach Mr Franco. when the target was detected with one led from 8 meter, one led only stayed on even though distance decreased to 1 meter, decreasing on distance did not effect on lighting, is it normal? is it possible also tell me your opinion about capacitor c9?

[FrancoItaly]

If the LRL has 3 LEDs, approaching the target should come first 2 leds and then 3 leds.
C9 connects the antenna to the base of TR2, I think that the value is not critical, it is located in series with the base junction / emitter of TR2 (about 10pF) and in parallel with C10. For this reason if you do not use C10 LRL works the same, because there is always parallel to L1 the parasitic capacitance of thejunction base/emitter.

Best Regards

[Mohlrl]

although distance decreased from 8 to 1 meter,unfortunately only one led was on,it is while my lrl is very sensitive, it is showed in movie, it is why I try to increase sensitive more. i use version 3 with 3 led. maybe the Iran geography is different. i use 3 turns for L1. I am very apologize that took your time,but many different people in Iran like your lrl and try to make it, but in our sit, felezjoo.ir, after 200 page discussion about your lrl, we cant use it and best result is this one led light result. if you have any other offer for us, we are very enthusiastic to listen to it.
thank you very mach again

[LRLMAN]

I CAN NOT UP LOAD AN IMAGE SOMEONE COULD HELP ME ??

[FrancoItaly]

As I said 8 m are a good distance that proof that the LRL works well. You can increase the DC gain of the amplifier, by changing R1 from 150K to 56K, R2 from 220K to 470K and changing the value of the voltage divider R3 / R4 / R5 / R6, try R3 = 15K, R4 = R5 = 3.3K, R6 = 4.7K or R3 = 18K, R4 = R5 = 2.2K, R6 = 4.7K. In this way, the LEDs (2 and 3) are switched on with a lower voltage.

Best Regards

[sakher]

Hello Mr. Franco

Through my experiences I think this device is sensitive to stream of water
But I did not dig to make sure
what do you think?

[FrancoItaly]

It never happened, but it could happen if the stream has a particular orientation with respect to the axis north / south.

[ayoni03]

hi Franco

What's your idea...

[ayoni03]

try

[FrancoItaly]

Good job, in the past I have used a PIC for this purpose, can not remember the type but it had 18 pins. However for this purpose it is also sufficient a LM3914 that can operate as bar or dot

Best Regards

[abdou2014]

I tested your lrl ( C13 / 10 nF ) ( very sensitive to static and magnetic and sky effect ) with a High Frequency Generator ,
Trying different antenna the reception frequency does not change (77-80 Mhz)
is it normal , I want to increase it to 100 Mhz, how to do ???

[abdou2014]

do you Think with replacing the quartz with 10 mhz we'll receive 100mhz ???

[FrancoItaly]

My lrl works well (in my country) with various quartzs : 3 - 4 - 6 - 8 and 10 Mhz. you may try 10 Mhz but I think that there is no apparent link between the frequency of the quartz and frequency determined by L1 / C10.

Best Regards

[dream_man]

Hello dear Franco;
Hope you are well and your face is smiley. I found that this system would turn on its LED1 just near a wastewater hole or sewage hole. As I understood, at these types of places, there are some sort of gases like Hydrogen sulfide and some Ions like Ammonium Ion.

[zakari]

hi all


hi all iranian members

happy new year:cheers::cheers::thumb::thumb:


best regards

[FrancoItaly]

The lrls are devices with high gain and therefore easily influenced by any source of electromagnetic disturbance, it would be better to do the tests away from any disorder.

Best Redards

[LRLMAN]

I still can not upload images............................................ .........

[afshin]

Hi mr franco
I remember that you said this lrl early was a rf sniffer that you changed to the lrl.for what range of frequency the rf sniffer was be made to work?
Thanks

[FrancoItaly]

If I well remember in the FM range, 90-120 Mhz.

[afshin]

Thank you dear franco

[afshin]

If I well remember in the FM range, 90-120 Mhz.
Hi dear franco
If this circuit amplify the FM band why we dont use a 100mhz crystal in oscillator stage?

[FrancoItaly]

It is not so simple, the 8MHz signal (this may be in the range 2-10Mhz) is amplified many times and provides a stable output (DC voltage) even in the absence of the "phenomenon." TR2 is a mixer where the phenomenon picked up by the antenna interacts with the signal coming from the 8MHz oscillator and I do not know exactly what is the type of interaction, however, the DC output increases. And there is not an obvious relationship between the oscillator frequency and the frequency of the signal coming from the antenna.

[lykian]

Hello All forum members and Mr Franco;

i liked your Project its really magnificent.... i follow your writings for 3 months.. :)
when i follow your Project i was too excited :) and i saw Mr Andrea's ''pd clone anderson'' Project. But i felt little bit Commercial purpose on his Project so, he is right as a result... but i learnt this purpose when i started to make his Project :(
I m from Turkey, may be u can understand where i live from my nickname :) i worked many of detectors in my country,, but really really i need Purposeful a Project...

if i been a rich man, i had bought many kind of LRL's and Alonsons :)

i need to your helps... if you help me i will be too happy ...
i want to thanks already to you...
if you want you can writ me as mail; maviadaya@hotmail.com

Regards for all forum members :)

[FrancoItaly]

Hi lykian,

If you read the previous posts you should find everything you need, however, I post again the whole project.

Best Regards

[lykian]

Thank You very much Mr Franco. I know this.. is this only working for to find gold or all metals? I mean ; does anyone have Field experiment?

thanks...

[FrancoItaly]

for nearly all non-ferrous metals, but there are no accurate data. To my experience definitely for gold, silver, copper and brass.

[lykian]

Thanks Mr Franco...

The stringent things are thats old irons and old pice of leads.. Many of detectors worried us as valuable...And it breaks our hopes day by day :)

Thnk you for your interest..

Regards..

[folharin]

I live in brazil. Now with test field my 15 months of life. I can see all the mysteries of detectors lrl.meu detector accused at half a meter in rainy day. Day does not detect the campo.em rainy day the deterctor accuses wires of the fence The dry field does not even detect the field of

[folharin]

I choked my minelab safari on test field. He accused but I am 20 days without receiving the signal by lrl. Maybe he sucked the ionic field

[folharin]

My minelab sucked ionic field from the testing site.It may take another year to ionic field back

[WM6]

My minelab sucked ionic field from the testing site.It may take another year to ionic field back

Yes, minelab sucking.

[abdou2014]

Thank you Mr Franco for your beautiful LRL finally I succeeded, I have a friend who had a small problem, when he adjusts the sensitivity with the gain, Each time the gain decreases alone and it will be forced to recalibrate it by Increasing the gain, The power supply is stable LM7812.
What he should do ?

[FrancoItaly]

I'm happy for the good results, can you tell us which target and at what distance is it revealed? About your friend, the DC output of the stage sensor is stable? In DC amplifier (LM358) what values for R4, R3 and C1? With too much gain stage may self oscillate. The battery power is more than 15V? However, it is normal that changing the gain also needs to adjust the threshold.

Best Regards

[abdou2014]

About 3 meters from test field , About my friend R3, R4 and C1 as the schematic, Two battery 9V that is to say 18v Connect with LM7812, he told the gain decreases alone and slowly, exp : If it sets the gain potentiometer to a point where the led flashes, after a few seconds the led turns off , and the sensitivity decrease ???

[FrancoItaly]

As I said you have to check the output of the stage sensor, the DC voltage must be very stable. Another cause can be the influence of the human body, moving the hand away after making the adjustments can cause a decrease in the signal.

Best Regards

[abdou2014]

you was right, the DC output of the sensor stage isn't stable, What is the source of this disturbance ? What must he change ?

[FrancoItaly]

Probably the stage sensor is oscillating, there is too much amplification or the defect is in the PCB. You must repeat the tuning process.

[zakari]

hi franco
how are you

I don't have any self oscillation at the sensor stage

but i have self oscillation at the display stage

how can i reduce self oscillation in the display stage

R3,R4,C1 are schematic value

thank you very much


best regard

[zakari]

hi
I have made some many pcb

I don't have any problem for revealed the metal this lrl work absolutely

MY problem is stability of this device

some of the pcb increase and some of them decrease voltage of the ledes

all of this pcb not have self ocsilation at the sensor stage without the xtal

when the devise is stable that revealed the baried metal very easy


thank you very much mr franco for your lrl

[FrancoItaly]

Disconnects the output of the sensor stage and checks if there are still oscillations.
If so, increases from 22nF to 100nF the capacitor between the output and the input- of the first operational (DC amplifier) and set the potentiometer to the minimum gain.
To minimize the possibility of auto oscillations, it is advisable to use two pcb one for sensor stage and the other for display stage, plus the sensor stage pcb is better double face, with lower face connected to ground. If there are no oscillations it's possible that there is too much gain in sensor stage, In this case decrease C13 / C14 and increase C2 / C3 / C4 for to have a DC output in the range 4-6V.

Best Regards

[FrancoItaly]

You can also try to change the quartz frequency for example 6 or 4Mhz. It seems strange that the DC amplifier may oscillate as there is not much gain.

Best Regards

[zakari]

hi franco

thank you so much

best rgards

[zakari]

hi dear franco

one of the my friend ask two question
and he want your respond about that

1-when does the led turn off? while the antenna is above the target or operator's feet is above the target

2-what's the difference reaction of the lrl when that sense the sky or compass effect and when that sense the barried metal


thank you so much

best regard

[FrancoItaly]

The behavior is normal for a lrl, near and on the target's vertical, the signal disappears. Instead, with the compass effect, the signal remains practically constant moving in the north / south direction or vice versa. However, the lrl must be set to not have this effect (decreasing the gain).
I would like to know the type of buried metal and the distance of revelation, thank you.

Best Regards

[Angelos]

i need your help franco......
my dispaly stage it is on all time.......:(

any help from all of you...plz

thank you all on this forum

[FrancoItaly]

If you refer to the schemas I put here the output of IC1A is too high, this means that the output of the sensor stage is too low, it must be about 4 to 5V. Tell me what the value is.

Best Regards

[Angelos]

hi franco and thanks for replay

it is crazy but ....i have 13.5 volt aoutput
my sensor work perfect......5.86 v
0 withaout crystal......155 mv on antenna
2 side pcb
20045
but i make 1 led sensor and give me 13 volts
http://www.longrangelocators.com/forums/attachment.php?attachmentid=18651&d=1384343478
i tray the 3 led dispay

and somthing more senior franco....tl072 chip itray tou make whith this
tell me your opinion and thanks again

[FrancoItaly]

TL072 as TL082 are not suitable because did not work well with single power supply.

Best Regards

[Angelos]

thanks a lot for your help senior franco :)

all the best too you

[fear009]

hi mr francoi . i have a question??
what version is the best for biuld??
1 led or 3 led?
i read many page but i confused
thanks a lot

[FrancoItaly]

No doubt, with more leds you have more precision to determine the target's position, since approaching the target the signal increases until it disappears on the vertical of the target.

Best Regards

[fear009]

ok.so i use and build the shematic in page 1 ??
thanks a lot

[FrancoItaly]

the schematic for power stage is in "Power display stage (1 led)" and the display stage is in
"displayStage(3 led)".

Regards

[fear009]

ok.thanks mr franco

[fear009]

the schematic for power stage is in "Power display stage (1 led)" and the display stage is in
"displayStage(3 led)".

Regards

ok.thanks mr franco

[stergeol]

How we regulate it if it goes north ;

[FrancoItaly]

I don't understand what you mean, if vou mean the compass effect, you must reduce the DC gain.

[stergeol]

Yes the compass effect .. DC gain in TR5 transistor ;

[abdou2014]

the DC Gain in display stage , P2 and R2 .

[liudengyuand]

Has anyone succeeded?

[havoc88]

Excuse me friends. Is this CD4046 PCB "working" or not ? I've tried this part overlay with no luck.
Are the parts in the right order or not ? If it's working which is the pin or part that I can take an output for LM3917 VU meter ?

Thanks in advance !
http://i.imgur.com/sxXhnNg.jpg

[FrancoItaly]

I have not tried this PCB so I can not give any judgments. My advice is to make the sensor stage on a separate PCB and fine-tune it. Then you can add the other stages. I attach here the original PCB I used in all models and I suggest to make it double-faced, with the bottom face attached to the ground. This prevents oscillations.

Best Regards

[havoc88]

Thank you Franco for your time plus your work!!

[Milad.salsa]

hi franco very tnx for publish your project .
i have a queistion,can your circuit sense a metal in 2meter or more under ground???(depth)
because i sense metel in 60cm or less

[FrancoItaly]

The operating principle of lrls is that a metal (non-ferrous) buried for some time emits a kind of signal (which we call "phenomenon") that can be revealed to dozens of meters away and (I suppose) to several meters of depth . The greater the burial time the greater the distance and depth to which it can be revealed. I think a 200 or 300-year-old buried metal can be revealed by a lrl to a few meters in depth, but I think the depth also depends on other causes, such as terrain and maybe even atmospheric conditions. The phenomenon can also be revealed to about 2 meters above the ground.

[Milad.salsa]

thank you franco you are a great man.i test your circuit in a place that mw wave was very low and your circuit dont worked then i test it in a place with mw wave and your circuit worked very good.now this circuit work by radio wave?

[Hadi]

The operating principle of lrls is that a metal (non-ferrous) buried for some time emits a kind of signal (which we call "phenomenon") that can be revealed to dozens of meters away and (I suppose) to several meters of depth . The greater the burial time the greater the distance and depth to which it can be revealed. I think a 200 or 300-year-old buried metal can be revealed by a lrl to a few meters in depth, but I think the depth also depends on other causes, such as terrain and maybe even atmospheric conditions. The phenomenon can also be revealed to about 2 meters above the ground.

Hi dear Franco
For long time buried your system can be revealed metal about 20 meters.
Thanks

[FrancoItaly]

thank you franco you are a great man.i test your circuit in a place that mw wave was very low and your circuit dont worked then i test it in a place with mw wave and your circuit worked very good.now this circuit work by radio wave?

Hi Milad.salsa,

What do you mean by mw wave? Surely the input circuit is tuned around 100Mhz, fm range. It's interesting to know the frequency you've noticed.

Best Regards

[FrancoItaly]

Hi dear Franco
For long time buried your system can be revealed metal about 20 meters.
Thanks

Hi Hadi,

You mean you found a metal 20 meters away?

Best Regards

[Hadi]

Hi Hadi,

You mean you found a metal 20 meters away?

Best Regards

The system is available to doing this performance.

B.R

[kaligula]

here my pcb files
its 2bl side ( one side as franco said ground )
i put each component where to have the least effect to other one . becuase of its ground it have to much low noise .:)
what do you think dear franco . need any changes ??
sry for my english :frown:Untitled.jpg (http://www.longrangelocators.com/forums/attachment.php?attachmentid=19870&stc=1&d=1479704300)

This pcb has error at first sight, 7812 is shorted

[kaligula]

NICE JOB;)

Where I can found this display pcb layout

[kaligula]

This pcb has error at first sight, 7812 is shorted

Its OK, I found corected pcb

[ford]

Can I use p1=20k and p2=500k in 3led display stage ?
I haven't 22k&470k potentiometer.

[kaligula]

Can I use p1=20k and p2=500k in 3led display stage ?
I haven't 22k&470k potentiometer.

I think it's ok, it's not a big difference

[kaligula]

Does anyone have made it with this pcb?

[ford]

When I touch antenna, led turn on and voltage increase!
What is problem?
Output voltage is between 5 V and 6 V.

[FrancoItaly]

Sometimes it has also happened to me, the test simply serves to determine if, by touching the input, there is some change in output. This way we are sure that no stage is in saturation or inhibition. The only reliable test is with a metal that has been buried for some time.

Best Regards

[ford]

Thanks Franco

Can it detect buried metal pipes?

I tested it but I can't detect any thing!

I'm sure that there is very buried metal in our places

Best Regards

[kaligula]

One more question about the potenciometers. Which one can be with on/off switch and which one is better to be multiturn for better results?

[FrancoItaly]

Hi ford,

Lrls can reveal gold, silver, copper and their alloys as long as they have been buried for some time and are insensitive to iron and steel. You have to have a test field where you have to bury some objects like silverware or coins at a depth of about 20 cm and wait 3/4 weeks (or more depending on the type of terrain).


Best Regards

[FrancoItaly]

Hi Kaligula,

No need for special potentiometers as On / off switch or multiturn.

Best Regards

[kaligula]

Hi Kaligula,

No need for special potentiometers as On / off switch or multiturn.

Best Regards

Ok, but to not put additional switch I want to put potentiometer with switch. I don't know to which one is better, to 470k or 22 k?

[FrancoItaly]

I do not understand what you mean to do, the 470k / 22k ratio establishes the operational gain, what is the switch for?

[kaligula]

I do not understand what you mean to do, the 470k / 22k ratio establishes the operational gain, what is the switch for?

For turning on the device

[FrancoItaly]

For turning on the device

I do not see any picture.

[kaligula]

I do not see any picture.

I can't upload pictures, I don't know why. So my question is to put switch for turning on and off the all unit. Its better for me to not put additional switch, I want one of the potentiometers to be with switch. Which one is better to be with switch?

[ford]

Hi ford,

Lrls can reveal gold, silver, copper and their alloys as long as they have been buried for some time and are insensitive to iron and steel. You have to have a test field where you have to bury some objects like silverware or coins at a depth of about 20 cm and wait 3/4 weeks (or more depending on the type of terrain).


Best Regards


Thank you France
I will do it.
Best regards

[FrancoItaly]

I can't upload pictures, I don't know why. So my question is to put switch for turning on and off the all unit. Its better for me to not put additional switch, I want one of the potentiometers to be with switch. Which one is better to be with switch?

Hi Kaligula,

It's not a good idea, every time you turn it on, you have to find the right setting. It is better to have a separate switch. Anyway 470K or 22K is the same thing.

Best Regards

[kaligula]

Ok, thanks for answer. I purchased this pcb from this document. Does someone has made this device with this pcb?

[ford]

I think Franco pcb is better.

[Napsterce]

Franco has explained that his pcb has it's own capacivity which plays role in the whole circuit...

[kaligula]

To use Franco pcb is best way with minimum risk, but nowhere here I couldn't find display stage pcb with 3 led. Because that l purchase this pcb, so we'll see the results. By the way I want to ask administrators why I can't upload.pictures.

[Napsterce]

Kaligula i have sent you private message.

[kaligula]

Kaligula i have sent you private message.

I can't find it. Send it to my email or write here

[kaligula]

We are starting. I'll gonna make it with transistors BC183L, I
couldn't find BC183C, is it some problem?

[FrancoItaly]

We are starting. I'll gonna make it with transistors BC183L, I
couldn't find BC183C, is it some problem?

All transistors as BC...C, work, "C" is for very high beta (gain). Probably BC ... B types also work. You can measure the transistor beta with the tester, values over 500 are fine.

[kaligula]

All transistors as BC...C, work, "C" is for very high beta (gain). Probably BC ... B types also work. You can measure the transistor beta with the tester, values over 500 are fine.

It supposed to be OK, it is declared as 900

[FrancoItaly]

It supposed to be OK, it is declared as 900

BC183LC is in the range 450 - 900

BC183LB is in the range 240 - 500

BC183L doesn't exist, it must be LA or LB or LC

[kaligula]

BC183LC is in the range 450 - 900

BC183LB is in the range 240 - 500

BC183L doesn't exist, it must be LA or LB or LC

No, it's L, I can't upload pictures. In datasheet which I upload there are L, LA, LB, LC. All of them have same pin configuration. It have bigger range 125-900

[FrancoItaly]

No, it's L, I can't upload pictures. In datasheet which I upload there are L, LA, LB, LC. All of them have same pin configuration. It have bigger range 125-900

Anyway the beta must be more than 500.

[kaligula]

I have other question. Is it big consumer of elecric power? I plan to use 4 batteries from cell phones with capacity from 1000 to 2000 mAh

[kaligula]

I put two variable capacitors from 5p parallel with 15pf, so we'll see the results

[ford]

Hi all
I used BC549B and my Lrl work fine.

Best Regards

[ford]

Hi all
I used BC549B and my Lrl work fine.

Best Regards


BC549B is low noise transistor via 200 ~ 450 hfe.

[FrancoItaly]

The absorption is very small, 20 - 40mA, depends on how many leds are used. I recommend two 9V batteries connected in series.

[kaligula]

The absorption is very small, 20 - 40mA, depends on how many leds are used. I recommend two 9V batteries connected in series.
Great, ill use 4 mobile phone batteries from 3.7v and I'll conect them with 4s electronic board for lithium batteries. I'll have around 15v. I finish soldering today, but I'll try tomorrow or some other day. Thanks Franco for your cooperation. To bed is that I can't upload pictures. Is it there some other way?

https://image.ibb.co/ewNxMa/IMG_20170816_101751.jpg

https://image.ibb.co/ftBoBa/IMG_20170817_153400.jpg

https://image.ibb.co/ep5yBa/IMG_20170817_153418.jpg

https://image.ibb.co/m57TBa/IMG_20170817_153741.jpg

[FrancoItaly]

Great, ill use 4 mobile phone batteries from 3.7v and I'll conect them with 4s electronic board for lithium batteries. I'll have around 15v. I finish soldering today, but I'll try tomorrow or some other day. Thanks Franco for your cooperation. To bed is that I can't upload pictures. Is it there some other way?

https://image.ibb.co/ewNxMa/IMG_20170816_101751.jpg

https://image.ibb.co/ftBoBa/IMG_20170817_153400.jpg

https://image.ibb.co/ep5yBa/IMG_20170817_153418.jpg

https://image.ibb.co/m57TBa/IMG_20170817_153741.jpg


Good work, as regard to upload pictures, you must read forum rules, for example jpg no more than 1M.

[kaligula]

Hallo Franko, from sensor stage I have 6,9 v. Is it good idea to remove all three 1p capacitators to decrease the voltage? When I touch the antenna voltage increase. In display stage I have problem, only one led is on and it's going on off only with use of 22k potentiometer. When R16 is not attached the led is off.

[kaligula]

Now is ok. I put twisted wire of place at three 1p capacitors and now buy cutting it step by step I have around 5,5v at out of sensor stage. Now my problem is that when I touch the antenna voltage goes up.

https://image.ibb.co/cG7n6k/IMG_20170819_103023.jpg

[FrancoItaly]

Now is ok. I put twisted wire of place at three 1p capacitors and now buy cutting it step by step I have around 5,5v at out of sensor stage. Now my problem is that when I touch the antenna voltage goes up.

https://image.ibb.co/cG7n6k/IMG_20170819_103023.jpg

Twisted wire instead of capacitors it's a good idea to reduce capacitance. As regards antenna test I already said that the important thing is that the DC output decreases or increases, that's there is a change, by performing that we are sure that all the sensor stage is ok. The only true test is in the test field.

[kaligula]

Twisted wire instead of capacitors it's a good idea to reduce capacitance. As regards antenna test I already said that the important thing is that the DC output decreases or increases, that's there is a change, by performing that we are sure that all the sensor stage is ok. The only true test is in the test field.

Yes, sometimes it increase and sometimes it decreases. Now I'm not able to test it in open environment.until I'll not put in the box. It's very sensitive device. Does it good idea the 22k potentiometer to replace with 10 k? I think it has big value.I'll read again all thread to see where maybe I make mistakes. Thanks Franco.

[FrancoItaly]

Yes, sometimes it increase and sometimes it decreases. Now I'm not able to test it in open environment.until I'll not put in the box. It's very sensitive device. Does it good idea the 22k potentiometer to replace with 10 k? I think it has big value.I'll read again all thread to see where maybe I make mistakes. Thanks Franco.

I think 22K or 10K it's the same thing. There is still a test that you can do, ie increase the gain until the compass effect appears and this is another proof of good functioning. Obviously, this does not guarantee that it also reveals the phenomenon.

[kaligula]

I think 22K or 10K it's the same thing. There is still a test that you can do, ie increase the gain until the compass effect appears and this is another proof of good functioning. Obviously, this does not guarantee that it also reveals the phenomenon.

I need to make field tests, but for that I'll need some time. I'm discovering something new about this device vith every new attempt to adjust it

[Milad.salsa]

HI FRANCO
I built a Franco circuit, but my circuit operates in the opposite case, when I touch the antenna, the LED turns on. My CIRCUIT has a lot of sensitivity to the ground, wall, and other objects. What is the problem?

[FrancoItaly]

HI FRANCO
I built a Franco circuit, but my circuit operates in the opposite case, when I touch the antenna, the LED turns on. My CIRCUIT has a lot of sensitivity to the ground, wall, and other objects. What is the problem?

Look at post #1659, as regards sensitivity to ground, wall I think that the gain is too big.
You must reduce gain in display stage.

[liudengyuand]

It is only the role of radio, such as mobile phone radiation, EDM reaction, for metal, even if you are buried for a thousand years, it is no wireless magnetic field radiation, so it is impossible to have any reaction to the metal, in the wild, Due to the role of the Earth's magnetic field, so that the reaction of the machine, people mistakenly think that is a reaction to the metal, in fact, no one with it really found the metal

[kaligula]

It is only the role of radio, such as mobile phone radiation, EDM reaction, for metal, even if you are buried for a thousand years, it is no wireless magnetic field radiation, so it is impossible to have any reaction to the metal, in the wild, Due to the role of the Earth's magnetic field, so that the reaction of the machine, people mistakenly think that is a reaction to the metal, in fact, no one with it really found the metal
Maybe yes, maybe no, the truth is one but only few it know:lol:

[kaligula]

Franco, way when I put it in point of balance it's burning my 22k potentiometer?

Its ok, I think I found the problem

Difference in pot legs

[folharin]

This lrl by itself does not reveal the phenomenon! Have to put transmitter....

[FrancoItaly]

This lrl by itself does not reveal the phenomenon! Have to put transmitter....

In my opinion, it is not necessary to add a transmitter, my lrl is of the passive type (as I think the other ones too). I think it's better to find another frequency to tune the input circuit. Another important thing is that you need to adjust the gain to the point where the compass effect appears and then decrease it until the compass effect disappears. You can also try to stretch the antenna up to 60 or 80 cm and move in the south / north direction. It should also be remembered that the metals buried for a few months emit the phenomenon in a small way compared to metals buried by tens or hundreds of years.

Best Regards

[kaligula]

I made today field test. I have buried 0,1 gram pure gold around 4 years. But on my test filed there ara a lot of other metal buried like copper, iron, buried burned nails and other junk from building the house. So I catch signal with one led when I go to gold, but I'm catching and meny other signals from junk. I went to the nwar mountain and there is more stablile. Still I'm in learning phase, my device is not packed yet, so with picture or video I'll come in near future. It's best working when I walk from west to east. Franco, I'm waiting for your opinion.

[FrancoItaly]

I made today field test. I have buried 0,1 gram pure gold around 4 years. But on my test filed there ara a lot of other metal buried like copper, iron, buried burned nails and other junk from building the house. So I catch signal with one led when I go to gold, but I'm catching and meny other signals from junk. I went to the nwar mountain and there is more stablile. Still I'm in learning phase, my device is not packed yet, so with picture or video I'll come in near future. It's best working when I walk from west to east. Franco, I'm waiting for your opinion.

Also in my trial field there were many buried metals and the tests were really frustrating and the best thing is to go on open and unknowed terrain. It seems impossible to me that the best workink is from west to east. Since the lrl is a high gain instrument, it is necessary to have an accurate mounting (without flying wires). It is also useful to have a handle of 25 - 30 cm to hold your hand far enough away from lrl. Another thing that can happen when setting the threshold is that the hand affects this setting so that by moving the hand the threshold changes. Then this adjustment must be made taking into account this inconvenience.

[kaligula]

For now my device is little funny until I'll colect all parts. I don't have problem with touching pots. I tried in two opposite place s in my country and I think it's best working from west to east, I don't know why. My plan is when I'll complete it to go to places where I have information for buried big targets to see does I'll get strong signal

https://image.ibb.co/e83ap5/IMG_20170830_174501.jpg

[liudengyuand]

Only metal detectors will react to metal

[kaligula]

Only metal detectors will react to metal

If you say so...

[liudengyuand]

In fact, this is not a reaction to metal, it is only the response to the Earth's magnetic field, many people misunderstood

[kaligula]

Metal detector can be useful in finishing stage, but it's not necessary. If go hunting for cions, nails or beer cups its ok, but for my intereses no.

[liudengyuand]

kaligula，you email

[liudengyuand]

Lrl are deceptive trick,

[kaligula]

kaligula，you email

Please discuss here, I believe that lrl work or maybe I want to live with illusions. I'll repeat it's hobby for me and it's makes me feel better. I'm not throwing big money for devices, everything what I believe that has sense im making it by myself. And reading, and reading, and trying, and trying.

[FrancoItaly]

Please discuss here, I believe that lrl work or maybe I want to live with illusions. I'll repeat it's hobby for me and it's makes me feel better. I'm not throwing big money for devices, everything what I believe that has sense im making it by myself. And reading, and reading, and trying, and trying.

I fully agree with you. In the first years of participation in this forum I did not get any positive results, I only found out the reality of the compass effect and this convinced me that there was a phenomenon related to the terrestrial magnetic field in some way but that was and is still unknown to the official science . I am inclined to think that it is the solar wind that interacts with electrochemical phenomena occurring in buried metals. It remains a mystery to me that my lrl does not work in all countries, indeed in the same country some work and others do not. The only explanation that comes to mind is an incorrect implementation and development, since it is enough to diminish the gain (even slightly) to lose the phenomenon especially when it comes to metals buried recently.

[kaligula]

My new toy, this is Johnny Walker, for sensing initiall signals
https://image.ibb.co/jvjXOa/15042795235541692276845.jpg

[liudengyuand]

:D

[liudengyuand]

In any country, no one experiment success, but the Earth's magnetic field signal, cutting the Earth's magnetic field formation of the signal, not the signal issued by the metal, the so-called buried metal for a long time to have a signal, it is only some businesses in order to meet the buyer's delay

[abdou2014]

SENSOR

[abdou2014]

ALL

[zixelll]

Hello Franco, if I use a capacitor MKT?

[zixelll]

Better than these two capacitors mkt . ceramic disk

[FrancoItaly]

Better than these two capacitors mkt . ceramic disk

Ceramic capacitors are better for high frequencies. The input stage is about 100Mhz.

[zixelll]

Thanks, if you use a telescoping antenna, is it ok? And do you have any changes to make the device better?

[zixelll]

Does this device have a point-and-shoot feature?

[WM6]

Does this device have a point-and-shoot feature?

No without right accessory.
You need to ad this attachment:

https://images-na.ssl-images-amazon.com/images/I/516JFN9ptFL._SY355_.jpg

[FrancoItaly]

Thanks, if you use a telescoping antenna, is it ok? And do you have any changes to make the device better?

telescoping antenna is ok.

[FrancoItaly]

Does this device have a point-and-shoot feature?

Lrls are not for pinpoint and no point and shoot feature.

[zixelll]

What is the depth and radius of this device?

[zixelll]

Do you have any changes to create a better device? And what is the best transistor for this device?

[FrancoItaly]

Do you have any changes to create a better device? And what is the best transistor for this device?

The version I posted is the latest and the best. I used the BC183C because I have many but any transistor BC...C is ok. As far as performance is concerned, there is not much practice on the ground, and for that I wanted to make all the details public to build. However in the ground where I do the tests, the lrl feels some silverware (bracelet and cutlery) buried at 20 cm to about 3 meters away and this about 2 months after the objects were buried and proceeding north to south. In this direction the sensitivity is maximum. The "phenomenon" is very weak as intensity and the lrl has to work at maximum sensitivity. Here are the videos of some members of the forum:

https://www.youtube.com/watch?v=lp35Ly8Cw1Q

https://www.youtube.com/watch?v=eUKaU7awl18&t=23s

https://www.youtube.com/watch?v=yR3tzT2Jd-g

[zixelll]

Thank you for your comment about BC109

[zixelll]

Hello Franco, what do you think of this circuit?

[kaligula]

Hello Franco, what do you think of this circuit?

Its ok, I have made it

[reza vir]

Changing the main circuit board and bringing some parts together
The circuit does not work properly
You must make the same Franco-sent circuit

http://www.longrangelocators.com/forums/showpost.php?p=155345&postcount=1608

[kaligula]

Changing the main circuit board and bringing some parts together
The circuit does not work properly
You must make the same Franco-sent circuit

http://www.longrangelocators.com/forums/showpost.php?p=155345&postcount=1608

I don't agree, this is good pcb. I made this version because I can't find Separately display stage pcb

[reza vir]

your pcb has no problem
But for good result and good sense
You must create the original pcb
Or separate the parts into 2 parts pcb
I'm the best of the senses
When I got 2pcb I got it

[kaligula]

your pcb has no problem
But for good result and good sense
You must create the original pcb
Or separate the parts into 2 parts pcb
I'm the best of the senses
When I got 2pcb I got it

I haven't still try the device on some known treasure place because I'm waiting for enclosure and some other parts. But its very sensitive device. I made also pdk a13 who at same place is not giving any signal. I also now want to make and Totem and than to make comparation

[reza vir]

I also made most circuit boards several times
And the result was that there should be parts
Transmitter & Sensor & Sensor & Nutrition ...
Separate from each other in a few pcb packs
And they all function in an open and closed environment
And the forest and the desert and the city are different
The most important thing that affects them all is voltage and power
For example, I got a 1.5 volt battery from 10 meters, but others are much less
I got 300-year-old copper from 2 meters with 3 lights
But when it was windy, it was very weak
Again there is so much difference with others
Anyway . I want the best for you

[FrancoItaly]

As I have already said, the phenomenon is of very weak intensity, especially if the metal is buried for a short time, so it is necessary for the lrl to have the maximum gain possible. The sensor stage is essentially a high gain amplifier that amplifies the 8Mhz signal generated from the quartz oscillator and if the pcb is not well realized it's possible that the stage is self oscillating. The better solution is a double face pcb separated from the rest of the lrl. An empirical way of determining whether the gain is sufficient is to verify that the lrl is sensitive to the compass effect, that is to say that walking in the north / south direction always has a signal of the same intensity and it is understood that it is not a buried metal.
At this point, you must decrease the gain until the compass effect disappears.

[kaligula]

Does someone has realized difference when is moon full and young?

[zixelll]

Thank you for taking the picture of the circuit that we have?

[zakari]

HI ALL

MR ZIXELL THIS PCB BELONG TO MR PAYAM20

THAT IS OK

FOR BETTER ADJUST YOU JUST NEED SCOPE






BEST REGARDS

[kaligula]

I finally made it. Franco please tell me where is the best to attached volt meter, but to not affect at work at device? Can I attach at emitter at tr5?

https://image.ibb.co/k7mSeQ/IMG_20170920_070254.jpg

https://image.ibb.co/jOAER5/IMG_20170920_070307.jpg

https://image.ibb.co/nvEr65/IMG_20170920_071627.jpg

[kaligula]

At home I realized that the.biggest response with 3 leds it gives at ringing of home electromagnetic bell.

[kaligula]

Little voltage is low at and of senzor stage, now oll need to find again three pcs from 1p and to replace twisted wire

https://image.ibb.co/iiv0Yk/IMG_20170920_075037.jpg

[FrancoItaly]

I finally made it. Franco please tell me where is the best to attached volt meter, but to not affect at work at device? Can I attach at emitter at tr5?

https://image.ibb.co/k7mSeQ/IMG_20170920_070254.jpg

https://image.ibb.co/jOAER5/IMG_20170920_070307.jpg

https://image.ibb.co/nvEr65/IMG_20170920_071627.jpg

You may attach to TR5 emitter but the better is the output that's R16/C18 (that is a low pass filter). The sensor stage output is good in the range 4-6V but it's no critic, the important thing is the gain is as high as possible immediately before it starts to oscillate. Then via C2 / C3 / C4 you can determine the output DC voltage

[FrancoItaly]

At home I realized that the.biggest response with 3 leds it gives at ringing of home electromagnetic bell.

Each transmitter whose frequency (or its harmonic) falls in the frequency of L1 / C10 is obviously revealed by lrl.

[kaligula]

Each transmitter whose frequency (or its harmonic) falls in the frequency of L1 / C10 is obviously revealed by lrl.

But what is the gold frequency. Next week ill try with transmitter from tw6 to see does it will react, also and pdk a13 of Nicolas. It's going slowly but I'm not giving up.

[FrancoItaly]

But what is the gold frequency. Next week ill try with transmitter from tw6 to see does it will react, also and pdk a13 of Nicolas. It's going slowly but I'm not giving up.

I do not know if there is a special frequency for the "phenomenon" and more specifically for gold. As for my lrl we can talk about a range of frequencies, in fact these combinations are good, L1 = 3 turns and C10 = 22pF, L1 = 3 turns and C10 = 10pF up to the maximum frequency, L1 = 2 turns without capacitor (there is the parasitic capacity of the transistor emitter junction).
I'm also not sure that the phenomenon emits this frequency or that an external transmitter, such as a radio or TV station, is needed.

[kaligula]

I do not know if there is a special frequency for the "phenomenon" and more specifically for gold. As for my lrl we can talk about a range of frequencies, in fact these combinations are good, L1 = 3 turns and C10 = 22pF, L1 = 3 turns and C10 = 10pF up to the maximum frequency, L1 = 2 turns without capacitor (there is the parasitic capacity of the transistor emitter junction).
I'm also not sure that the phenomenon emits this frequency or that an external transmitter, such as a radio or TV station, is needed.

Until now at home I realized reaction of ringing doorbell and almost all bulbs at my home are led, but in one room there are two led bulbs from the brand Hyundai, but different model. When I put them on there is reaction of your lrl. I dont have spectrum analizer up to 90 khz to see what frequency thay are emitting. I need something like this with bigger bandwidth

https://image.ibb.co/iyM6r5/Screenshot_2017_09_22_12_03_27.png

[FrancoItaly]

I remind you of a tip I have given before, ie it is better to shield (with aluminum foil) all the lrl, including the handle (of course you need to connect the shield to ground).
You will find that by gripping it with 2 hands the sensitivity increases considerably, making the difference if the phenomenon is very weak. For example if with one hand alone you have 1 led on with 2 hands you have 3 led on, i.e. the maximun sensitivity. Or one hand = all led off,
2 hands = 1 led on. In addition, the sensitivity increases by lengthening the antenna.

[kaligula]

I remind you of a tip I have given before, ie it is better to shield (with aluminum foil) all the lrl, including the handle (of course you need to connect the shield to ground).
You will find that by gripping it with 2 hands the sensitivity increases considerably, making the difference if the phenomenon is very weak. For example if with one hand alone you have 1 led on with 2 hands you have 3 led on, i.e. the maximun sensitivity. Or one hand = all led off,
2 hands = 1 led on. In addition, the sensitivity increases by lengthening the antenna.

I know, but I want first to try without shild because the metal enclosure can affect lc constant. I noticed difference, better recponce with right or with both hands. I'm not home now, when I'll back ill experimenting with tw6 transmitter, and also I'll make ardiuno frequency player from 30 to 100 khz. But I don't know does I caN transmit it through speaker or it will need to go through some transmitter

[kaligula]

I have another problem too. When I measure voltage of emitter of tr5 or at the end of sensor stage with multimeter there is no problem. When I conect the voltmeter which I installed in the device the voltage drops. At tr5 emitter connected it goes 4,5v, at end of sensor stage is around 5v. When the circuit is affected at tr5 connected voltage goes up more then 5,6 v. And two leds are on. At strong signals and three leds going on. When I conect it at end of sensor stage the standby voltage is bigger, but only one led goes on, never two or three

[FrancoItaly]

I have another problem too. When I measure voltage of emitter of tr5 or at the end of sensor stage with multimeter there is no problem. When I conect the voltmeter which I installed in the device the voltage drops. At tr5 emitter connected it goes 4,5v, at end of sensor stage is around 5v. When the circuit is affected at tr5 connected voltage goes up more then 5,6 v. And two leds are on. At strong signals and three leds going on. When I conect it at end of sensor stage the standby voltage is bigger, but only one led goes on, never two or three

It is normal that the sensor stage output changes when it is in the box and even approaching the hand, so I suggest a handle about 25 - 30 cm long.

[liudengyuand]

With trumpet tr3.4.5 three transistors

[havoc88]

Hello Franco and friends.
I have a problem in sensor output R16/C18. It's always 7.25v no matter what I do.
Any ideas/suggestions? I 've checked everything. I m using a 8MHz crystal oscillator.

Thanks !

[kaligula]

Hello Franco and friends.
I have a problem in sensor output R16/C18. It's always 7.25v no matter what I do.
Any ideas/suggestions? I 've checked everything. I m using a 8MHz crystal oscillator.

Thanks !

And if you touch the antenna nothing is changing you have problem in sensor stage. Or try with twisted wire on the place of three capacitors from one pf. I have put pictures in older post.how it looks. This will decrease the voltage and maybe will solve the problem

[FrancoItaly]

And if you touch the antenna nothing is changing you have problem in sensor stage. Or try with twisted wire on the place of three capacitors from one pf. I have put pictures in older post.how it looks. This will decrease the voltage and maybe will solve the problem

Yes the signal from oscillator is too high or the stage is self oscillating.

[havoc88]

Thanks Franco and Kaligula for your answers.

[kaligula]

Special video for our master and friend Franco


https://youtu.be/5D9qZKbv69M

[liudengyuand]

Do not imagine it has a role, just exercise your diy hands-on ability, no other meaning

[kaligula]

Do not imagine it has a role, just exercise your diy hands-on ability, no other meaning

We'll see

[liudengyuand]

The world simply can not use lrl

[kaligula]

The world simply can not use lrl

If you're here to proof that lrl is not working than there's no need to lose your energy. For this type of devices I don't know does they're working or not, so for now I can't say nothing. But with other devices I have few successes, so your opinion please keep it for yourself. Your destructive energy please update it in something more useful
ps
You can go on Geotech forum and find some good.metal detector schematic and build it. Why you're loosing your time here..

[kaligula]

So, now i tried reaction of lrl Franco Italy and pdk A13 of Nicolas with transmitter of Fisher TW6 , so Franco Italy has no reaction of tw6 at all.PDK A13 has wide range of reaction with changing the capacitor form 1,5 nf to 47nf. But Franco Italy is reacting of other targets whose pdk a13 can't reach. So now we have to see on terrain what will be the reaction. By the way I'll make and Totem and we'll keep trying.

[Hadi]

Hello guys,
kaligula, I advise another testing franko to you. You try to change the display stage with digital, such as voltmeter or uC.
So you set threshold over zero, maybe 50 mv by POT.
Now you must find real treasure environment. You will see some where you have negative sensing and other where positive sensing.
This is advantage of franko.

Best regards

[kaligula]

I have voltmeter. It is connected to end of display stage, so the pots don't have roll for voltmeter. In my test poligon in open environment I have sky and compass effect. At aluminum target I think voltage goes down. My little gold target maybe is catching, but I'm not sure because there are and other signals around. Is catching some strong signal far away on southwest. I'll try it to other place where i think there is real target so we'll see

[liudengyuand]

:lol:

[abdou2014]

Thank you Mr Hadi , pls show us with a picture the exact point where we connect the

voltmeter in the display stage .

you told (pots don't have roll for voltmeter) you means the two potentiometers ??

[kaligula]

Thank you Mr Hadi , pls show us with a picture the exact point where we connect the

voltmeter in the display stage .

you told (pots don't have roll for voltmeter) you means the two potentiometers ??

You 're asking me?

[kaligula]

Thank you Mr Hadi , pls show us with a picture the exact point where we connect the

voltmeter in the display stage .

you told (pots don't have roll for voltmeter) you means the two potentiometers ??

I have voltmeter. It is connected to end of SENSOR stage, so the pots don't have roll for voltmeter. In my test poligon in open environment I have sky and compass effect. At aluminum target I think voltage goes down. My little gold target maybe is catching, but I'm not sure because there are and other signals around. Is catching some strong signal far away on southwest. I'll try it to other place where i think there is real target so we'll see


I made correction

[Hadi]

I mean the P1 potentiometer.
You surely find in real target some sensing.

https://ibb.co/dtA0Vb

[kaligula]

I mean the P1 potentiometer.
You surely find in real target some sensing.

https://ibb.co/dtA0Vb

Voltmeter, if you put it in display stage than it will be controlled by pots, but if you put it at emitter of tr5 in sensor stage than you cannot increase or decrease voltage by pots. It will be static and only when phenomenon is catched( or sky or compass effect) voltage will change

[abdou2014]

thank you for reply , I think you can not catch the phenomenon by connecting voltmeter at emitter of tr5 , you need more gain for that , i think we need fast stretcher , what do you think Mr Franco ?

[FrancoItaly]

thank you for reply , I think you can not catch the phenomenon by connecting voltmeter at emitter of tr5 , you need more gain for that , i think we need fast stretcher , what do you think Mr Franco ?

As I have said many times when there is the compass effect this means that the gain is enough, however I do not really like the use of the voltmeter.

[kaligula]

As I have said many times when there is the compass effect this means that the gain is enough, however I do not really like the use of the voltmeter.

Voltmeter is good to be connected to the out of sensor stage. First reason is that you can evidence and negative signals when voltage drops on some places. The second is that with voltmeter you can exactly find signal peak. If there is compass or sky effect you can't reduce it with potentiometers. You can reduce it in display stage, but not in sensor stage. By the way, I connected mine trough one transistor c945 and voltage goes from 4,44 v to 6,7v. My problem is that voltmeter is working at voltage s bigger than 4,2v so at 4,44v there is not good visibility on sun, and if voltage drops the voltmeter goes off

[VECTROUM]

Hello to all, i want to construct this lrl and if it is possible i want the latest pcb and parts list because i am confused.

Thanks in advance

[FrancoItaly]

Hello to all, i want to construct this lrl and if it is possible i want the latest pcb and parts list because i am confused.

Thanks in advance

The sensor stage:

http://www.longrangelocators.com/forums/showpost.php?p=155345&postcount=1608

For other sections (power and display) there are several possibilities. For power supply I would recommend two 9V series batteries + 7812 that provides 12V stabilized.

For display stage I suggest the 3 leds version and change P2 from 470K to 1M and R1 from 150K to 56K, P1 from 22k to 4.7K and add 2 x 8.2K resistances, one from +12V and P1 and the other from ground and P1. The purpose is to make more easy the threshold operation but depending on the output value of the sensor stage you have to change the 8.2K resistances, i.e 10k/6.8K or 15k/4.7k or others.

[abdou2014]

Mr Franco you said ( when there is the compass effect this means that the gain is enough )
After you said we must ( change P2 from 470K to 1M and R1 from 150K to 56K ) this change increases the gain ???

[kaligula]

The device is OK. Nothing does not need to change. If the signal from compass effect is existing the device will register it. So you'll search with your back to north and you'll not have compass effect. If you reduce sensitivity to turn off leds on compass effect than your device will not register other signals weaker than compass effect. If you're replace parts in sensor stage to reduce sensitivity the effect is the same. But my question is does it detect gold with stability and by reducing sensitivity to can pinpoint it. I'll test it soon

[kaligula]

By the way, display is good to can isolate different signal. For example some signal is starting from south, goes to west. Next to him other signal or compass effect is starting from west and goes to north. With display you can exactly see where signal starts, where is his peak and after that is getting weaker. Next to him is starting other signal or compass effect and voltage again goes up, so I think display is good visual help.

[FrancoItaly]

Mr Franco you said ( when there is the compass effect this means that the gain is enough )
After you said we must ( change P2 from 470K to 1M and R1 from 150K to 56K ) this change increases the gain ???

Yes this change increases the gain, it can happen that with the original values do not have the compass effect and therefore the gain is insufficient.

[FrancoItaly]

By the way, display is good to can isolate different signal. For example some signal is starting from south, goes to west. Next to him other signal or compass effect is starting from west and goes to north. With display you can exactly see where signal starts, where is his peak and after that is getting weaker. Next to him is starting other signal or compass effect and voltage again goes up, so I think display is good visual help.

I agree that the display has the maximum sensitivity but it takes a lot of skill to distinguish good signals from the compass effect. According to my experience it is best to adjust the gain so that it does not have the compass effect, so we are sure that every signal is only due to buried metal and the lesser sensitivity is reduced only to a smaller distance of revelation, for example if a silver coin is revealed at 5m with the display and at 4m without the display this does not affect the performance as in the second case the search speed is higher without having to look at the display continuously.

[abdou2014]

I had the compass effect with the original values , this is not the essential, you said ( 4m without the display ) explain me with which indicator ?
Thank you !

[FrancoItaly]

I had the compass effect with the original values , this is not the essential, you said ( 4m without the display ) explain me with which indicator ?
Thank you !


for display I mean analog indication (analog voltmeter) or led bar opposite to 1 led or 3 led of my original design. I think that with 3 leds you already have a full indication.
Of course if your lrl is sensitive to the compass effect it means that the gain is enough.

[liudengyuand]

Explain what is the compass effect, how does it manifest it?

[kaligula]

I don't know what to say. Today I was at terrain and test the Franco Italy lrl and pdk a13. Pdk is not registring nothing. Franco Italy lrl at north is registering compass effect. At west there were big transmition line, and is registering and them. At place where is supposed to has buried big target is not registering nothing


https://image.ibb.co/izTsDw/dalekovod_x_20141220112343.jpg

[kaligula]

But what if on appearance of phenomenon signal voltage goes down. Few times I
though that something is wrong with my battery connector because the display is going off at 4,2 volts at the point of supposed target

[FrancoItaly]

But what if on appearance of phenomenon signal voltage goes down. Few times I
though that something is wrong with my battery connector because the display is going off at 4,2 volts at the point of supposed target

"supposed target" it is not the best test, you have to bury for example silver objects in a land free from metals, best first pass with the metal detector. After 1 month or more the phenomenon is noticeable.

[Dubulumach]

Thank you Mr.Carl-NC for registering me on longrangelocators.com. :)

Hello Mr.FrancoItaly and all.

I was reading this FrancoItaly's thread from the first page and i have decided to try my luck.
I wish to replicate Mr.FrancoItaly's long range locator based on HEF4046 pll ic.

Please, Mr.FrancoItaly send me your pcb for pll 4046 lrl. :)
A am asking this simply because nobody succeed to make accurate 4046 pcb which work including Mr.Geo from Greece, which also has failed to tune his 4046 pll. I repeat Mr.FrancoItaly's words that "at output of preamplifier stage in that point "X" , exactly at collector of TR4, there need to be perfect sinus wave, not distorted sinus or any other forms".

Pleae Mr.Franco send me pcb here, or via email and please tell me how to tune your 4046 pll from fisrt step till the end, and test it on my test polygon where i have some silver and golden targets at 30 cm deep, about two years ago placed there. :)

my email is
boem987@gmail.com

Sincerely :)
Dubulumach