Lrl from Italy

[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


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]

Originally Posted by FrancoItaly

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]

Originally Posted by folharin

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 (LM35 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