Lrl from Italy

[mustefa ubram]

hi franco
This is my specifications of the device:
antenna:50cm
out put voltage sensor :about 5 volt
L=3turn
c=22p & variable Capacitor
test point:100 grams of silver at a depth of 25 cm About 1 month in the soil.
I've tested in practice.Unfortunately, in practice, had no answer.:frown::frown::frown::(:(:(:(
what is your opinion?

[brs]

One month is not enough after three months

[FrancoItaly]

Hi mustefa,
what kind of silver? maybe you need to wait any longer, as brs says.

[mustefa ubram]

Hi mustefa,
what kind of silver? maybe you need to wait any longer, as brs says.
25pcs coin silver historical ...

[folharin]

someone test this LRL real testing ground , which result?

[Napsterce]

Hello Franco, today I tested the LRL and it gets some signal. Is it possible it is catching other side of the Earth (not north)? In the picture with dot is marked the place where i was standing and with the line the direction i was measuring and in that line all 3 leds glow even with gain at lowest level.

[FrancoItaly]

are you sure that this is not the compass effect? Have you checked with a metal detector?

[Napsterce]

I have only tested the lrl on a place where gold is supposed to be burried by the germans in ww2. From the measuring point in the direction of measurment there is old german grave but it is maybe 500 meters far. On the picture is shown the measuring position and the earth sides (red N is direction of north) and when i measure to the north the leds turn off so i dont think it is catching north. The problem is that it is catching signal at lenght of 50 meters on the red line on the pictures, if i move 5 meters to left or right the signal is weaker or gone. B.R.

[Bill512]

I have only tested the lrl on a place where gold is supposed to be burried by the germans in ww2. From the measuring point in the direction of measurment there is old german grave but it is maybe 500 meters far. On the picture is shown the measuring position and the earth sides (red N is direction of north) and when i measure to the north the leds turn off so i dont think it is catching north. The problem is that it is catching signal at lenght of 50 meters on the red line on the pictures, if i move 5 meters to left or right the signal is weaker or gone. B.R.

my opinion is that 500 meters, or even 50 is way to much.
Probably, compass effect.
By the way, the "compass effect" direction, also determinates your primary searching direction and it's not always in North-South direction.
Furthermore, this effect has nothing to do with the magnetic field of the earth but mostly related to RF local field in the searching area.
The searching procedure , it's not easy at all.
Read again and again the instructions from Franko...

[Napsterce]

Bill512 It's all by Franco's instructions, as i said even at lowest gain it is catching the signal at that place, all the other places it doesn't catch it, even when i move from there like 10m to left or right the signal is weaker, if it is catching "compass effect" it will catch it at any place i test the lrl.

[afshin]

Bill512 It's all by Franco's instructions, as i said even at lowest gain it is catching the signal at that place, all the other places it doesn't catch it, even when i move from there like 10m to left or right the signal is weaker, if it is catching "compass effect" it will catch it at any place i test the lrl.
Hi Napsterce
Your opinion is right,that is not
compass effect,it is maybe a big phenomenon field, therefore
You have to shorten antenna to minimum size or even remove that from the circuit box and try again at lowest gain measuring
signals to find the center of signals.

[Bill512]

Bill512 It's all by Franco's instructions, as i said even at lowest gain it is catching the signal at that place, all the other places it doesn't catch it, even when i move from there like 10m to left or right the signal is weaker, if it is catching "compass effect" it will catch it at any place i test the lrl.
then do what afshin suggests: reduce somehow further the overall gain, gradually, and try to localise the anomaly...

[Golden]

Hi Napsterce
Nothing new ..?

[folharin]

after 8 years participating in this forum still believe in pd alonso is the best LRL this forum, may be new member not to be reliable, I am the esteban time, I know thatfranco italy do your best but do not believe this faicha 8 mhz be the way

[FrancoItaly]

Hi folharin,

you built alonzo PD? I have built many years ago but without having a good result.

Best Regards

[abdou2014]

FRANCO YOU ARE THE BEST :)

[folharin]

I'm working on alonso pd from 6 separate pcbs and different turns ferrite

[afshin]

Hi dear franco
If we use another transistor with the hfe=1000 and ft=200 Mhz instead of the bc183c isn't better? Doesn't the lrl work with more sensitive in this case?
Best Regards

[FrancoItaly]

Hfe=1000 is a great value, are you sure that is not darlington? if the LRL is too sensitive can self oscillates or may be sensitive to compass effect.

[abdou2014]

Mr Franco Can I Use This Transistor In Your LRL :
BC550C / Transition frequency (ft), MHz: 150

[afshin]

Hfe=1000 is a great value, are you sure that is not darlington? if the LRL is too sensitive can self oscillates or may be sensitive to compass effect.
alright! Mr Franco, bravo!
that is darlington type 2N5526
http://alltransistors.com/transistor.php?transistor=4951

http://www.semicon-data.com/transistor/tc/2n/2N5526.html

[afshin]

Mr Franco,bc183c ft is 150Mhz,
isn't better that we use a transistor with ft=200 Mhz and hfe=420 ? The hfe is the same value as the bc183c approximately , but the higher ft maybe better, because the frequency band is wide Compared to the previous state and the amplification will be better for the Received frequency, what is your opinion Mr Franco?

[FrancoItaly]

Yes all transistors BC....C with ft=> 150 and hfe>400 are OK.

[FrancoItaly]

I think it's possible to use transistor with ft=200 or more and only one turn for L1, but I have not tried.

[pigeon]

pcb franco

[Napsterce]

@Golden Nothing new, i'm trying to make a stronger transmitter and see what will happen.

@abdou2014 I used BC550C in my version, it's working good.

[afshin]

@Golden Nothing new, i'm trying to make a stronger transmitter and see what will happen.

@abdou2014 I used BC550C in my version, it's working good.
Napsterce what kind of transmitter are you making?

[brs]

Distant and remote from towns and Towers communications areas to be a transmitter urges buried metals

[afshin]

OK! Brs, thanks

[folharin]

expensive franco ytali friend!, I hear you say that forum member getting gold coins meeting your LRL .this information is true?

[folharin]

xpensive franco italy! friend, I hear you say that gold coins FIND fórum member with your LRL .this information is true?

[FrancoItaly]

Hi folharin,

Yes a member of this forum has informed me privately that he found with my LRL 26 gold coins from the early 1800s to a distance of 15 m and buried almost 1 meter deep.This shows that the gold buried for a long time is detectable at a considerable distance, and that on the contrary buried by little time is practically not detectable, obviously with my LRL. It would be interesting, as has already been done, try the infrared.

Best Regards

[hadi-dindar]

very nice franco.
can you reshare all information about this lrl.
we cant sense any thing with your lrl.
but you sense coins in 1m with 15 distance !!!!

[abdou2014]

Mr Franco what did you mean by (try the infrared) ? can you share with us this work !

[FrancoItaly]

AS I said this discovery was made by a member of this forum who wants to remain secret, he told me (by email) that he used my LRL and of course a metal detector. He lives in a country of Central America. As for the use of infrared for now it is just a theoretical project and for the moment I do not have the chance to build it.

[abdou2014]

Mr franco . who is better we use two telescopic antennas or one stylus antenna ?

[FrancoItaly]

I have not noticed big differences, but I must admit that I have not done a lot of tests.

[abdou2014]

I found a varactor with an ideal value, KV 1310 / 19-46pF, can you show me a diagram how to connect . Operating voltage 2 to 8 volts. Thanks

[FrancoItaly]

I repost here the schematic.

[abdou2014]

this circuit, is it standard, and give the same capacitance for different varactor range ?

[FrancoItaly]

the circuit is universal, if you change varactor you have other values of capacitance

[abdou2014]

Thank you !

[abdou2014]

Mr Franco , when we found and localized the teste fields, how much distance can we searching with this configuration around the test field ? Thank you .

[taxma1981]

https://www.youtube.com/watch?v=lp35Ly8Cw1Q
https://www.youtube.com/watch?v=eUKaU7awl18
https://www.youtube.com/watch?v=BUzyKuUQExE
https://www.youtube.com/watch?v=8hYI7-10ROg
https://www.youtube.com/watch?v=CWtoyZ-gxho
https://www.youtube.com/watch?v=BQfyqmgCdcY

[Nicolas]

https://www.youtube.com/watch?v=lp35Ly8Cw1Q
https://www.youtube.com/watch?v=eUKaU7awl18
https://www.youtube.com/watch?v=BUzyKuUQExE
https://www.youtube.com/watch?v=8hYI7-10ROg
https://www.youtube.com/watch?v=CWtoyZ-gxho
https://www.youtube.com/watch?v=BQfyqmgCdcY


Success has a title fight and perseverance, research and the length of breath and lack of attention to what it says Duds = The Long range = :cool:

My Congratulation Nikos and Franco

[Arionas]

This is Lrl Panagiwtis(Franco)...........and work perfect
this video upload Panagiwtis


https://www.youtube.com/watch?v=lp35Ly8Cw1Q
https://www.youtube.com/watch?v=eUKaU7awl18
https://www.youtube.com/watch?v=BUzyKuUQExE
https://www.youtube.com/watch?v=8hYI7-10ROg
https://www.youtube.com/watch?v=CWtoyZ-gxho
https://www.youtube.com/watch?v=BQfyqmgCdcY

[FrancoItaly]

Hi abdou2014,

when you buried the metal you have to wait at least a month, and the metal will be revealed at the beginning to about 50cm and over time the detection distance will be greater. It really depends on soil type and metal.

Best Regards

[FrancoItaly]

Hi Arionas and taxma1981,

thanks for your cooperation I hope this helps the other forum members.

Best Regards

[abdou2014]

you did not understand me ,
Assuming I localizer target of the test field, and I keep the parameter of the coil and capacitor C 10.
what is the maximum search distance for the real targets with this fixe value of resonance ?

[FrancoItaly]

I do not have enough experience to answer this question, plus there are many variables involved.

[abdou2014]

I don't want to know at what distance i can localizer the target ,I know its depends the underground duration and size of target . but i want to know at what distance i have to change the value of capacitor or have to make another test fields for search the targets around.

[FrancoItaly]

My answer is still the same, basically all my tests I made in a test field that I now no longer available, and also I am abroad.

[abdou2014]

Thank you Mr Franco .

[taxma1981]

This lrl ist from panagiwths

[dream_man]

Hello dear Franco.
Hope you are fine. May I know, how does it act when I remove C10?...May you explain a bit more. Thank you.

[FrancoItaly]

If you take away C2 remains in parallel to L1 base - emitter capacity of TR2 (about 10pF).

[dream_man]

what do you think about lower amounts of c10? ... Is it better to catch the phenomenon?

[FrancoItaly]

with C10 in 10-33pF range or no C10 I have not noticed any difference.

[dream_man]

Same here Franco. I also applied both the varactor idea and other amounts of c10 even removing that. but I have not found considerable changes. But for more turns of the L1, it will be more sensitive to the waves or other sources of energy.

[FrancoItaly]

With more turns for L1 you lower the resonant frequency, the same thing you did by increasing C10.

[dream_man]

That's it. Thanks dear Franco.

[abdou2014]

Mr Franco , What is the best for L1 2 Turns , 2-22p Or 22-44p ?

[FrancoItaly]

After several tests I use 2 turns for L1 and 22pF for C10.

[abdou2014]

I think there is an error , you lrl does not work between 100-150 Mhz .

[FrancoItaly]

I'm sorry, I was wrong, L1 has 3 turns.

[taxma1981]

this is my lrl ,i use variable capasitor 0-22 pf,i have a strong signal but i dont know what is there:lol:

https://www.youtube.com/watch?v=10eh5SoVgMs

[FrancoItaly]

You have a signal only in "pinpoint mode"? In this case I think it is a smaller target, and you can check with a metal detector.

[dream_man]

Hello dear Franco.
Regarding your LRL, I'm sure Abdou is right. According the metrics you mentioned earlier, the L1 length is about 10mm, coil diameter 10mm, and wire diameter 1mm. So with these metrics, the L1 must be around 0.027 micro henry and when we add c10=22pF, the resonance frequency is approximately 200 MegaHertz which is quite far from 100 Megahertz. Something is wrong here.

[WM6]

..... you can check with a metal detector.


All end up with metal detector.

Why not with metal detector from start?

All will be faster, without waste of time on such wanna-be LRL creations.

[taxma1981]

today test the detector in another area, I had small marks at one point, I put detector and banged, very soon we will learn what has thear...

[FrancoItaly]

Hi dream man,

my lrl works well with 3 turns for L1 and 22pF for C10, the resonant frequency is not important, I do not understand what you worry.

Best Regards

[abdou2014]

Mr Dream men, you made false calculates , L1 2 turns length 8 cm wire 1.3 uH. resonance with 22p = 29 MHz.
Mr Franco, you told the resonance is not important , its mean we can locate the targets with these parameter in all countries ?!!!

[taxma1981]

i think the most important of this device is the antenna and the LC circuit :D

this is my first coin for 1 meter distance and 10 cm depth,am very happy :lol:

https://s22.postimg.org/w9n5annul/20160916_002022.jpg (https://postimg.org/image/w9n5annul/)

https://s10.postimg.org/f7wfhbbyt/20160916_002549.jpg (https://postimg.org/image/f7wfhbbyt/)

[abdou2014]

congratulation taxma. is it franco lrl in the video ?, i mean the black box. I saw no exterior antenna, can you show us with a picture please.

[taxma1981]

The antenna is funny but work well, is a cable 10 cm with nose of 24 carat gold, with another antenna not functioned:lol:

https://s22.postimg.org/acgelgy4t/20160916_004257.jpg (https://postimg.org/image/acgelgy4t/)

[taxma1981]

with another antenna i can not calibrate the lrl why?the signal is full and i have problem with the bazzer....

[abdou2014]

10 cm diameter of circle, like Flat spiral pancake Tesla coil , good idea :razz:

[taxma1981]

and i use this variable capasitor
2.2-22 pf
https://s17.postimg.org/vlsrpzdi3/VRC0076.jpg (https://postimg.org/image/vlsrpzdi3/)

[dream_man]

Mr Dream men, you made false calculates , L1 2 turns length 8 cm wire 1.3 uH. resonance with 22p = 29 MHz.
No Mr Abdou. you are quite wrong. first of all it is not 8cm, its 10mm as Franco said.
the second, 2 turns dont give you 1.3 uH at all. Calculate again.

[dream_man]

Hi dream man,

my lrl works well with 3 turns for L1 and 22pF for C10, the resonant frequency is not important, I do not understand what you worry.

Best Regards

Hi Franco. I have no doubt in your work or what you say. just I'm trying to conduct this project and tackle the problems or obstacles if any. dont mind my friend.

[abdou2014]

8 cm, the length of the wire when the wire is not wound, 10 mm is length between the two winding and the winding diameter ,

[FrancoItaly]

Hi taxma1981,

What you say is very interesting, I invite all those who still have not managed to make running my LRL to try this new type of antenna. You think it's necessary 24-carat gold or also works with 18-carat gold? This antenna also reveals silver and other metals?
You can try the stylus antenna to the minimum length and putting a gold ring at the end.

Best Regards

[taxma1981]

Hi Frank, the antenna stylus to me does not work well, but this does not mean that it is not correct, right now I do experiments and see that a copper coin does well, gold simply walked PILOT without some THEORY


Sorry for my englisch

[FrancoItaly]

i taxma1981,

all improvements are welcome and probably the input stage (antenna / L1 / C2) must be "personalized" in dependence on the country.

Best Regards

[brs]

Hello taxma1981
I want to show us that you used antenna and thank you

http://store2.up-00.com/2016-09/1474113453551.jpg

[Nicolas]

The antenna is funny but work well, is a cable 10 cm with nose of 24 carat gold, with another antenna not functioned:lol:

https://s22.postimg.org/acgelgy4t/20160916_004257.jpg (https://postimg.org/image/acgelgy4t/)

Yes Gold 24 Karat it work same is a oscillator right Taxma . My congratulation for you and for your first coin copper.

[Nicolas]

Hi taxma1981,

What you say is very interesting, I invite all those who still have not managed to make running my LRL to try this new type of antenna. You think it's necessary 24-carat gold or also works with 18-carat gold? This antenna also reveals silver and other metals?
You can try the stylus antenna to the minimum length and putting a gold ring at the end.

Best Regards

Hi francoItaly how are§
The 24 karat gold work well same at a oscillator that is realty but between 2 Ferrite like antennas Gold gun 707 or 718.

[Nicolas]

Hello taxma1981
I want to show us that you used antenna and thank you

http://store2.up-00.com/2016-09/1474113453551.jpg

Thanks is right is a oscillator. Minieoro using that at ionic room = Sensor low frequency

[taxma1981]

Thanks nikolas
,my second target:lol:

https://s12.postimg.org/bq7pwdzyx/20160917_153644.jpg (https://postimg.org/image/bq7pwdzyx/)

[taxma1981]

Hello taxma1981
I want to show us that you used antenna and thank you

http://store2.up-00.com/2016-09/1474113453551.jpg





Probieren


https://s22.postimg.org/6uheqha8d/Untitledan.png (https://postimg.org/image/6uheqha8d/)

[taxma1981]

Hi francoItaly how are§
The 24 karat gold work well same at a oscillator that is realty but between 2 Ferrite like antennas Gold gun 707 or 718.

my gold gun work with this antenna nikolas,

[brs]

thanks taxma1981

[Nicolas]

my gold gun work with this antenna nikolas,


:cool: Good luck, I saw that you are diligent.:cool:

[taxma1981]

Today i tested this lc circuiti think this coil it is not gut:(

https://s21.postimg.org/yrqp243yb/20160918_030358.jpg (https://postimg.org/image/yrqp243yb/)

[taxma1981]

Today i tested this lc circuiti think this coil it is not gut:(

https://s21.postimg.org/yrqp243yb/20160918_030358.jpg (https://postimg.org/image/yrqp243yb/)

I was wrong finally the mini coil from one radio is very good:)

[FrancoItaly]

what are the exact measures of L1? I see 4 turns. There is some change by tuning C10?

[taxma1981]

The c10 it is 2-22pf varieble capasitor,L1 5mm diameter

[abdou2014]

with this antenna that you found the targets Mr Taxma ?

[taxma1981]

Yes mister,it is not gut?:lol:2 days buried copper test

https://youtu.be/w6VXMdljJsc
https://youtu.be/bpuPpH0WzyQ

[abdou2014]

I built your version Franco LRL :D

[taxma1981]

and working?: Lol:

[abdou2014]

Of Course :razz:

[taxma1981]

today locate a point 10 meters distance, at the earliest opportunity will remove the metal to see what is:)
http://s12.postimg.org/qyjrztka1/antik_thron.jpg (http://postimg.org/image/qyjrztka1/)

[abdou2014]

how you can get this picture ?

[taxma1981]

this is a technology 2020: Lol:: Lol:: Lol:whith a samsung s6 edge

[abdou2014]

you are funny , really how :|

[taxma1981]

you are funny , really how :|



I'm not kidding,but this is franko lrl thema

[abdou2014]

how to connect the LRL with phone and the name of software ?

[taxma1981]

you can not connect the lrl with the phone my friend,this is a extra method

[abdou2014]

How explain me ?

[taxma1981]

http://s9.postimg.org/3m2s1dxuj/IMG_2773.jpg (http://postimg.org/image/3m2s1dxuj/)
http://s22.postimg.org/78guwuyvx/20160612_145303.jpg (http://postimg.org/image/78guwuyvx/)
http://s21.postimg.org/ekonf3odf/anti.jpg (http://postimg.org/image/ekonf3odf/)


this method is funny bat working

[abdou2014]

Physics Toolbox Magnetometer ???

[taxma1981]

;)Physics Toolbox Magnetometer ???
:)

[abdou2014]

BUT THIS IMAGE IS NOT FORM PART OF THIS SOFTWARE ???

[folharin]

which lrl version has gotten better results friend taxma1981?

[FrancoItaly]

Hi taxma1981,

the copper target buried for two days already seems a bit corroded, perhaps this explains the short time. I suggest you try adding vinegar in the ground around the target. I also ask you to better explain how you made your antenna as it seems to be more sensitive to the "phenomenon." Unfortunately I'm not at home and I can not conduct experiments.

Best Regards

[pigeon]

nice work:)8)

[taxma1981]

Hi franko,
the coins I had much time to a bag of Franco, so this turned green until I told them bury you and me to do the test ...

[taxma1981]

the antenna not emerged with some theory Franco, I like to do experiments and tests and thus became, the coil is from old radio and the antenna was completely accidental, set above in a radio station and that was it

[FrancoItaly]

Hi taxma1981,

well, now it would be interesting to see if there is a kind of best antenna from the other or if it is necessary for each location a specific type of antenna. Of course the most sensitivity must only be for metals and not for the compass effect. As I said lengthening the antenna increases sensitivity to metals but also for the compass effect. The stretching can be useful only for pinpoint.

Best Regards

[taxma1981]

these days continues the experiments, the position and the type of antenna plays a big role

[pigeon]

these days continues the experiments, the position and the type of antenna plays a big role

;)

[abdou2014]

Mr Taxma, what is the version of your LRL , 8 Mhz or PLL4046 ?

[taxma1981]

Hi,i have now with the crystal 8 mhz ,i have a :angry:problem ,the lrl dont working evry day way?

[abdou2014]

sorry for you , please what's the value of C13-C14-R1-R2-C1 in your 8 Mhz LRL?

[abdou2014]

Mr Franco , The Sky and Compass Effects can not be with a tiny antenna like L1 ? I increased the maximum gain without having, how did you get it ??

[FrancoItaly]

sky and compass effects are always unwanted, but are useful to adjust the LRL to the maximum sensitivity that corresponds to the point before the start of the effect. To get what decrease the value of R10 in the version with 1 LED (from 220K to 100K or 47K) or in the 3 LED version change R1 from 150K to 100K and R2 from 220K to 470K. It is possible that more short antennas are less susceptible to the compass effect.

[taxma1981]

One test with stylus antenna

https://youtu.be/ZYarSUEa2dc

[taxma1981]

Not gut today

http://s17.postimg.org/udyak4x9n/20160925_182441.jpg (http://postimg.org/image/udyak4x9n/)

[abdou2014]

Telescopic , you didn't answer to me :|

[taxma1981]

Telescopic , you didn't answer to me :|

The same with the 8 mhz schematic

[abdou2014]

thank you to all 8)

[taxma1981]

Real distance,it is the same video 1and 2 part

https://youtu.be/nwDZBcncd2I
https://youtu.be/O-Y0BC5E34k

[afshin]

Real distance,it is the same video 1and 2 part

https://youtu.be/nwDZBcncd2I
https://youtu.be/O-Y0BC5E34k
hi taxma
did you check to detect what is there buried and depth of the target? (In these video)
thank's

[Nicolas]

Real distance,it is the same video 1and 2 part

https://youtu.be/nwDZBcncd2I
https://youtu.be/O-Y0BC5E34k


Good success friend i m happy :) for you

[taxma1981]

Thanks nikolas,I put no disk at this point,4 years before I found a gold earring in this area

[abdou2014]

Congratulations Taxma :)

[nelson]

Congratulations Taxma.
Question now is if you are going to share with us, details of your circuit?
If your answer is yes, you will be the first good man who can really share real LRL.
We also must thank Franco for his support and dedicated time to help us build this unit.
I have build one unit, but not finish jet. So i will continue my work in a few more days.

Good test, excellent video and thanks for sharing.
Regards
Nelson


Real distance,it is the same video 1and 2 part

https://youtu.be/nwDZBcncd2I
https://youtu.be/O-Y0BC5E34k

[GOLDEN LILLY]

Nice video taxma.

I made the same lrl but difficult to pinpoint the target and only two directions it will beep from NW and SE. Lowering the antenna to pinpoint the sound disappears. At least i got the idea from this video on how to manage to pinpoint the target.

[taxma1981]

Congratulations Taxma.
Question now is if you are going to share with us, details of your circuit?
If your answer is yes, you will be the first good man who can really share real LRL.
We also must thank Franco for his support and dedicated time to help us build this unit.
I have build one unit, but not finish jet. So i will continue my work in a few more days.

Good test, excellent video and thanks for sharing.
Regards
Nelson


thank you very much, and of course I want to share the circuit, it is not secret ..
I do experiments on two receivers and I see differences, the circuit I made is the crystal 8 mhz, another that also works well is one battlfield laser detector with the difference that at the entrance we have a crystal oscillator as well as the same circuit Lc Franco ..I am not my good acquaintances but like doing experiment

https://s9.postimg.org/c0bqwnagb/kuklwma_apost.jpg (https://postimg.org/image/c0bqwnagb/)
https://s16.postimg.org/6x767q501/lwr_2.png (https://postimg.org/image/6x767q501/)

[taxma1981]

From lrl franko i use this circuit

https://s15.postimg.org/nppiu66dz/8mhz_sensor_stage.jpg (https://postimg.org/image/nppiu66dz/)

[taxma1981]

It is important the LC circuit to tunning to a radio station of your area

[nelson]

Thanks taxma. So you did 8 mhz stage, plyus an amplifier stage, correct?


thank you very much, and of course I want to share the circuit, it is not secret ..
I do experiments on two receivers and I see differences, the circuit I made is the crystal 8 mhz, another that also works well is one battlfield laser detector with the difference that at the entrance we have a crystal oscillator as well as the same circuit Lc Franco ..I am not my good acquaintances but like doing experiment

https://s9.postimg.org/c0bqwnagb/kuklwma_apost.jpg (https://postimg.org/image/c0bqwnagb/)
https://s16.postimg.org/6x767q501/lwr_2.png (https://postimg.org/image/6x767q501/)

[taxma1981]

Thanks taxma. So you did 8 mhz stage, plyus an amplifier stage, correct?

I do not understand well, I mean that this project with an oscillator and the circuit lc Franco WORKED ..
Can someone fix it properly the changes;

[ouiarabe]

From lrl franko i use this circuit

https://s15.postimg.org/nppiu66dz/8mhz_sensor_stage.jpg (https://postimg.org/image/nppiu66dz/)



Thank you for your cooperation taxma1981, but personally I did not understand exactly what you did.
is what you have modified the schema Franco Italy or what ????

[taxma1981]

Franco's plan does not hurt, it works

[abdou2014]

Mr taxma , can you share with us your PCB :)

[nelson]

Hi Taxma.
What i mean, if you build just franco 8 mhz circuit, or you build it with an extra circuit or amplifier to allow it to get more sensitivity.

Franco, can you tell us if you understand what did Taxma to the circuit, is there another stage that allows it to get the signal from far away?
Ina advance many thanks
Nelson

I do not understand well, I mean that this project with an oscillator and the circuit lc Franco WORKED ..
Can someone fix it properly the changes;

[FrancoItaly]

It is not very clear, but surely this is not only my LRL, I think that the operation key is Tr2, where the "phenomenon" interferes with 8MHz signal which is then amplified.

Best Regards

[taxma1981]

Hi again and sorry for my englisch,
the additional circuit is not for the circuit of Frank..it is for the circuit battlfield lazer detector...this circuit with a crystal oscillator and a LC circuit working well.....

[pigeon]

Hi again and sorry for my englisch,
the additional circuit is not for the circuit of Frank..it is for the circuit battlfield lazer detector...this circuit with a crystal oscillator and a LC circuit working well.....

hi taxma:)


you can forget your pcb.

thank you

[taxma1981]

today i throw away and the two receivers, it is not possible to work one day and then not do anything ...:lol::lol::lol:

[pigeon]

:razz:today i throw away and the two receivers, it is not possible to work one day and then not do anything ...:lol::lol::lol:
:p:razz::lol::D;)

[darkman]

hi franco , and all :)
i removed the quartz and changed c13+c14= 7.4nf, until i got 0.04v DC on output . then i get back the quartz to the Bord and replace c2,c3,c4 with 6.6pf , i got 4.7 volts on output .
when i move my hand near the Bord the output volt drop up to 6 vdc .:|
in stand by mood :
tr2 collector = 4.7 vdc .
tr3 collector = 4.9 vdc .
tr4 collector = 5.3 vdc .
tr5 Emitter = 4.7 vdc .
L1 is 3 terns 1cm diagram with 22pf on c10 , i used 25cm to 1m of stylus antenna .
note: when i Touch the antenna the output volt jump from 4.7 vdc To 5.6 vdc . (but in test field the first led is off ).
* 2 days ago i went to test field , i got 400 grams of Yellow and red copper buried for 3 month's , 30cm depth , but without any Result , the lrl are not Responds >>:frown:
what did u think franco , where is the problem ?

[FrancoItaly]

Hi darkman,

The values seem correct, the correct value of sensitivity is a bit less than the beginning of the compass effect. Have you tried this test? If you are unable to have this effect means that there is not enough amplification. This is confirmed by the fact that you are using 6.6pF for C2, C3 and C4, typically this value is about 1pF. Also for the gain of the stage it is the rule that maximum gain is before the stage starts to self oscillate. Controls the gain of TR2, TR3 and Tr4, beta must be 500 or higher, try to lower the value of R10-R12 from 1K to 560 ohms or less. Of course there is also the possibility that the buried metal not issue the "phenomenon."

Best regards

[afshin]

Hi Taxma
Your project is very good,I have a question Mr Taxma:
What is the number of ferrite beads used in this circuit?
(Number or mark)
Thanks

[taxma1981]

I dont know my friend,not something writes,a friend gave me this ferrite,this man make radio

[afshin]

Thanks Taxma

[darkman]

Hi darkman,

The values seem correct, the correct value of sensitivity is a bit less than the beginning of the compass effect. Have you tried this test? If you are unable to have this effect means that there is not enough amplification. This is confirmed by the fact that you are using 6.6pF for C2, C3 and C4, typically this value is about 1pF. Also for the gain of the stage it is the rule that maximum gain is before the stage starts to self oscillate. Controls the gain of TR2, TR3 and Tr4, beta must be 500 or higher, try to lower the value of R10-R12 from 1K to 560 ohms or less. Of course there is also the possibility that the buried metal not issue the "phenomenon."

Best regards
Thx mr franco ..
I mean that I removed c2, c3, c4 then I put 1capester 6.6pf .. sorry for my English
Thx

[darkman]

Thx mr franco ..
I mean that I removed c2, c3, c4 then I put 1capester 6.6pf .. sorry for my English
Thx

sorry i was Wrong , (2 of 1pf capacitor in parallel +1pf in series) total capacity of c2,c3,c4 is 1.5pf ..

regards

[eroll]

Hello

I want to add sprint lay file of abdou2014 picture of 8mhz version

I added 470 k pot I hope İt is correct place;)

[Nicolas]

Hello

I want to add sprint lay file of abdou2014 picture of 8mhz version

I added 470 k pot I hope İt is correct place;)

Hi Erol.

Thank you welcome at our forum

best regards
Nicolas

[eroll]

Hello All

Abdou2014 sprint lay6 file at link 8mhz Franko İtaly Lrl

https://yadi.sk/d/MyhXySWExGNC2

Abdou are you success to built this version?

any hint ?

[abdou2014]

Other version with varicap diode :)

[GOLDEN LILLY]

Here is my LRL based on franco's design. 19784

19785

[GOLDEN LILLY]

Why is it my attachment cannot be viewed? I followed instructions to post image here in manage attachment but still it cannot be viewed.

[pigeon]

:cheers:Why is it my attachment cannot be viewed? I followed instructions to post image here in manage attachment but still it cannot be viewed.

[GOLDEN LILLY]

My Franco lrl... Very sensitive. I have not yet tested on the field. But initial test is promising..

Regards...

[FrancoItaly]

well done, I see you've also put a compass, it is almost essential because the response is very dependent on direction and is maximum in the axis north / south.

Best Regards

[GOLDEN LILLY]

Yes, it is necessary to put a compass directly visible to the operator to know where is north and south, as this lrl, accordingly, will detect only in north and south directions. However, mine detects not north and south but NE and SE. Why?...

regards...

[GOLDEN LILLY]

Excuse me, it is NW (not NE) and SE where my lrl respond to compass effect...

Regards...

[FrancoItaly]

It is not important the direction of the compass effect, it is instead important that there is not the compass effect and this is achieved by reducing the sensitivity.

[sakher]

hello my friends
i am read all of posts in this project and i thank you so much and thank you mr.francoItaly
my name is sakher a new member in this forum
please help me ..i want find the last PCB of display stage with 8mhz can you help
sory for english .

[FrancoItaly]

this is the pcb by Dream man who really did a good job.

[pigeon]

hi all

I made the dream man version for the second time but it does not function.

help me pelase

[sakher]

thank you veary much Francoitaly and Dream man

[FrancoItaly]

I have not tried the dream man version, here I post my original PCB surely working. The components are soldered on copper side. I want to remember that it is a high-gain stage and the need to avoid self oscillation.

[dream_man]

this is the pcb by Dream man who really did a good job.
Thanks dear Franco for compliments.
It needs couple of minutes to look at the PCB which I drawn and its quite clear that I just made a copy of your pcb. So it works well as I made and its working properly but never tried in the field yet.

[dream_man]

thank you veary much Francoitaly and Dream man
your welcome sakher :cheers:

[AurumKid]

Hi Taxma

What is the maximum range of detection for the copper coin you found?

Hello Sir Franco

Is it posible to increase the depth range for deeper target for example 5meters deep buried gold bar?

Regards

[FrancoItaly]

I think the only way to increase the range is to increase the gain but this can only be done if you do not see the compass effect. However, I think that gold buried for a long time is detectable at a distance greater than one piece of copper of the same volume.

[abdou2014]

can we isolate the sensor from the compass effect and receive only the target field Mr franco ?

[FrancoItaly]

I do not know, but it could be that the "phenomenon" is part of the compass effect, there may be an ion channel on the north / south direction and a buried metal may vary locally the amplitude of this flow. In that case there would be no possibility of eliminating the compass effect.

[abdou2014]

if the "phenomenon" is part of the compass effect and we don't must increase the sensitivity until the compass effect , in this case we can't detect the phenomenon, unless the phenomena is manifest before the compass effect , please How far we lower the sensor from the beginning of the compass effect for detect the phenomenon ?

[FrancoItaly]

as I said you have to adjust the gain until you see the compass effect, then reduce it until the disappearance of the compass effect. If my theory is true then the "phenomenon" increases the compass effect in the vicinity of the target and can be revealed from the LRL. By varying the gain you get a kind of ground exclude.

[abdou2014]

Can i do this setting with the threshold potentiométer ( i fixed the gain with a resistor ) or it must be with the gain ?

[FrancoItaly]

Yes you can do this setting by threshold potenziometer.

[sakher]

Can I replace the display stage with frequency counter?

[FrancoItaly]

no, the output of sensor stage is a DC voltage.

[abdou2014]

who is the Fine and accurate adjustment , threshold or gain ?

[zakari]

hi francoitaly

why have you made pcb of the sensor and display stage seperatly?

i am thinking one of the your secretes is that.

what about you?

[AurumKid]

I think the only way to increase the range is to increase the gain but this can only be done if you do not see the compass effect. However, I think that gold buried for a long time is detectable at a distance greater than one piece of copper of the same volume.

I think compass effect is hard to eliminate. Maybe some modification to the circuit or increase the gain as you said will do.

Thank you Sir Franco

[zakari]

I belive the increase gain isnt useful because detect the compass effect we can also amplify the phenomenon of target
do you remember that morgan said tv amplify the phonemenon

perhaps we can amplify the phenomenon with vhf frequence and high voltage

[abdou2014]

Mr franco ,who is the Fine and accurate adjustment , threshold or gain ?

[FrancoItaly]

The best thing is to act on the gain, the threshold is for fine-tuning. I think that it is better to use two separate PCB for sensor stage and display stage, to avoid couplings parasites that might trigger self oscillations. If this were to happen it would not use the maximum gain for the sensor stage.

[abdou2014]

Thank you Mr Franco , you helped us a lot , the separation pcb enough or we must also separate the power supply ,each stage has its battery ?

[FrancoItaly]

No, just a single power supply, but each stage must be decoupled as shown in the wiring diagram. C5, C6, R4 for the oscillator stage and C7, C8, R5 to the amplifier stage.

[sakher]

is there any PCB for only display stage that you see it suitable?
and Thank you so much.

[abdou2014]

Display 1 Led

[abdou2014]

The best thing is to act on the gain, the threshold is for fine-tuning. I think that it is better to use two separate PCB for sensor stage and display stage, to avoid couplings parasites that might trigger self oscillations. If this were to happen it would not use the maximum gain for the sensor stage.

how to know that is a self oscillator , in any case the LED lights by increasing the potentiometer ?

[FrancoItaly]

If it is in self-oscillation then also removing the quartz we have a DC output. With respect to thresold potentiometer I don't understand what you mean, by varying the cursor you find a point where the led is on, variant on the contrary the led goes off.

[abdou2014]

I did not understand self oscillation, my LRL is very sensitive , in the house it detect TV 3 meter, the telephone and internet cables 1 meter, outside the house when i raise my hand the LED lights, I lower my hand the LED off , is that self oscillation ?

[FrancoItaly]

No, your Lrl is ok. With self oscillation the Lr is almost insensitive.

[abdou2014]

i'm glad to hear that , thank you Mr Franco :)

[brs]

Display 1 Led

Is it possible pcb black and white

[abdou2014]

1 LED DISPLAY PDF

[brs]

1 LED DISPLAY PDF

Thank you

[abdou2014]

SENSOR :)

[abdou2014]

Sensor :)

[abdou2014]

No, just a single power supply, but each stage must be decoupled as shown in the wiring diagram. C5, C6, R4 for the oscillator stage and C7, C8, R5 to the amplifier stage.

Mr Franco ,has he done our friend Mustapha a mistake in putting R5 C7 C8 in this location or it does not matter ?

[FrancoItaly]

I seem fair at first sight.

[zakari]

HI dear franco and abdo

mustefa"s pcb is mistake in pin4 of the lm358 and decoupling capacitors of display stage and...:nono::nono:

[sakher]

HI dear franco and abdo

mustefa"s pcb is mistake in pin4 of the lm358 and decoupling capacitors of display stage and...:nono::nono:

hi all

I made the dream man version for the second time but it does not function.

help me pelase

:???: :shrug: mr. franco what i mast do now? plese help me !

[mee]

Hi mr franco
I am perfect pi detector man but i to intend mak your lrl
I think this device is good.
I have some questions?
1: in some device used 2 or 3 antenna master antenna connected to pcb to L1
But to where connected other antenna on the pcb please insert schematic for use 2 or 3 antena

2: in some device use plastic tube and make bobin with copper wire how make this bobbin

3: som people changed L1 and c10 or changed others parts but results bad to state.
What your sight? And what good change parts is better?

I need your email for send my pi detector and i have questions of you
Best regards

[FrancoItaly]

HI sakher,

You can use my original PCB for sensor stage, for display stage there is no problem, it's no critic.

Best Regards

[FrancoItaly]

Hi mee,

1 - one antenna (or more) is connected to L1/C10, this is the only input.

2- the stylus antenna is better than coil antenna, it's easier to build and by stretching it can increase sensitivity.

3 - In my opinion the original values for L1 / C10 are correct and only later (with LRL working) you can find the best possible values.

my email is "sandokan51@libero.it"

Best Regards

[mee]

Hi franco
Tanks of you
I make your both circuit LRL ( original board and with 4046)
But no one worked and not detecting my device is silent except when to rotate
Gain or threshold POT.
I don't know. Why?
What This device worked and how tests device?
Im tested with gold coin but device not actions and led is off.
This device used a transmitter board ?
Best regards
M.E.E

[FrancoItaly]

As I have said many times LRL only works with metals buried for a long time, at least a few months, also depending on soil type. It is therefore necessary to have an area where testing, burying for example of silver and waiting at least a few weeks. My lrl is a passive receiver and the oscillator does not transmit.

[mee]

Hi franco
Tanks of you
I think a lrl detector parable pi detector , detected
All metal in air or in ground.
I to understand LRL detector, detectet old metal and only in the ground.
But i seen your video in YouTube , the device detected metal in room
It is different detector?
http://youtu.be/eZUfg2kF4-Y
http://youtu.be/ib72FWjxYTw
http://youtu.be/l3nH9CG0lI8
Best regards
M.E.E

[FrancoItaly]

My LRL (as I think the other lrls) reveals not only the "phenomenon" but every other source that emits signals whose frequency (or even harmonics) falls in the input resonant frequency of the LRL. Such as mobile phones, remote controls, wireless and so on. Even in my house there are several points where the LRL is activated and this I think is the case of the video that you saw. Near radio transmitters, the LRL is virtually no use.

[folharin]

any member could post the 1 led display schematic?

[FrancoItaly]

Best Regards

[folharin]

19831

[FrancoItaly]

This is not my PC and is not complete, however, the power stage there is only one LED and is connected between R6 and + 12V.

[abdou2014]

I DON'T USE BUZZER .

[folharin]

thank you

[sakher]

Hello
Is This device can detect if the target was inside a box?

[taxma1981]

I think NOW

[mee]

hi dear franco
my device not worked
emeter TR1 is 8Mhz signal .
baise TR2 is not signal .
and i test diffrent LC tank resonance between 100Khz to 140Mhz but my device not worked
pcb (( pcb file upload here ,with altume designer ))and all parts is ok
so i make device with 4069 pll but not worked.
i dont no
help mee
best regards

[brs]

Hi Franco
Is it possible to amplify this phenomenon transmitter Should separate transmitter receiver


http://store1.up-00.com/2016-11/1478940511511.png

[mee]

Hi all
Oscillator waves output in the oscilloscope not symmetrical if used this circuit for oscillating
Output wave is better
Best regards

[FrancoItaly]

Hi all,
I will post again a few tips that I have given above, I recommend the quartz version, simpler to build and debug. The oscillator is a Colpitts without the emitter capacitor which it has proved not necessary but that you can put in the event that the stadium is not in oscillation. The signal at 8MHz based on TR2 is so small that in practice it is not measurable, it is best to measure the DC output on the TR5 emitter.

Best Regards

[mee]

Tanks dear franco
I check it

[pigeon]

Hi all
Oscillator waves output in the oscilloscope not symmetrical if used this circuit for oscillating
Output wave is better
Best regards

:)

[zakari]

thanks alot my dear franco

[dream_man]

Hello dear Franco;
Hope you are well and your face is smiley. Just to inform you, I prepared several tests on my test field which contains of several copper coins in 30cm depth, the circuit revealed nothing, but in my friend's test field which contains more than 1Kg coppers in 1 meter depth buried for several years, your circuit revealed it by 1 LED in 1 meter distance. Hope it's helpful.

[FrancoItaly]

hi dream man,

This is useful, you can try to extend the antenna and raise the gain, in sensor stage and in the display stage.

Best Regards

[dream_man]

Hi. All the changes applied and the result is what I mentioned above.

[sakher]

how i can raise the gain in sensor stage?

[folharin]

Friend dream man, in his project, which color led detected the phenomenon?

[dream_man]

Hi my friend, it depends on what color you use for LED IC1. I mean the first LED connected to IC1.

[FrancoItaly]

Hi sakher,

Look at my helps, if you follow my instructions you will set the stage for maximum sensitivity.

[sakher]

Thank you Mr. Francoitaly :)

[zakari]

hi dear franco

i made your lrl and i have 5.14v in out put and i touch the antenna voltage drop down only 20mili volt

is this correct ?

thanks for your help

[zakari]

dear franco

first i disconnect the xtal out put was 5.07 and sensor working vice versa i touched the antenna voltage drop up to 5.1v then i decrease c13 to 470pf and c14 to 390pf out put was been zero and connect the xtal c2=c3=c4=1pf

out put voltage is 5.14v now

if i touch the antenna voltage decrease to 5.12v

is this correct or no?

[FrancoItaly]

It's correct, the important thing is that there are no auto oscillations and obtaining the maximum amplification.

[PanosP]

I greet the members of the forum ...
I ask forgiveness for my English ...
After trying enrolled in forums ...
My turn and I publicly thank Franco to manufacture.
I am an amateur in electronics and maybe I can not give precise information
to the members who they asked me in my email
But I can upload my work and experiments I did and maybe some help ...

https://postimg.org/image/jord1udjp/
https://postimg.org/image/yfll52yqn/
https://postimg.org/image/bsu4hujnt/

[PanosP]

I made many boards always 2 pieces to end up in the Franco project with two copper sides of the receiver, but I put the ground at the bottom.
Stis trials I 1 lrl 6 capacitors of C10 from 18p to 47p and a lrl with 12 capacitors
from 18p to 1n to some I caught metals or some of the other nothing.
while at home the signals caught by 8-9 m. the tester to 4-5 meters.

https://postimg.org/image/6lfvb7v9f/
https://postimg.org/image/jlz2rj9il/

https://www.youtube.com/watch?v=tyDgBLH_2Bg

6 capacitors

https://postimg.org/image/ri4l7gox1/
https://postimg.org/image/q37x4seor/

12 capacitors

https://postimg.org/image/70nxtlgur/
https://postimg.org/image/q8k4p7bn7/

https://www.youtube.com/watch?v=ib72FWjxYTw

[pigeon]

:):):)THANK YOU VERY MUCHI made many boards always 2 pieces to end up in the Franco project with two copper sides of the receiver, but I put the ground at the bottom.
Stis trials I 1 lrl 6 capacitors of C10 from 18p to 47p and a lrl with 12 capacitors
from 18p to 1n to some I caught metals or some of the other nothing.
while at home the signals caught by 8-9 m. the tester to 4-5 meters.

https://postimg.org/image/6lfvb7v9f/
https://postimg.org/image/jlz2rj9il/

https://www.youtube.com/watch?v=tyDgBLH_2Bg

6 capacitors

https://postimg.org/image/ri4l7gox1/
https://postimg.org/image/q37x4seor/

12 capacitors

https://postimg.org/image/70nxtlgur/
https://postimg.org/image/q8k4p7bn7/

https://www.youtube.com/watch?v=ib72FWjxYTw

[Arionas]

I made many boards always 2 pieces to end up in the Franco project with two copper sides of the receiver, but I put the ground at the bottom.
Stis trials I 1 lrl 6 capacitors of C10 from 18p to 47p and a lrl with 12 capacitors
from 18p to 1n to some I caught metals or some of the other nothing.
while at home the signals caught by 8-9 m. the tester to 4-5 meters.

https://postimg.org/image/6lfvb7v9f/
https://postimg.org/image/jlz2rj9il/

https://www.youtube.com/watch?v=tyDgBLH_2Bg

6 capacitors

https://postimg.org/image/ri4l7gox1/
https://postimg.org/image/q37x4seor/

12 capacitors

https://postimg.org/image/70nxtlgur/
https://postimg.org/image/q8k4p7bn7/

https://www.youtube.com/watch?v=ib72FWjxYTw


Panos P
https://s21.postimg.org/a4fcryy3b/HAND2.jpg