Lrl from Italy

[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]

final pcb

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]

help

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

[AurumKid]

Range

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.