Lrl from Italy

[FrancoItaly]

This is not mine, it comes from the forum, I have not tested but I thing it's working. I have not a decent Pcb to show.

Best Regards

[Avanturis]

Thanks Franco,one more question,please:
Can the 70 circles of the antenna wire to be of dimension 0,40mm?
Thanks and best regards

[FrancoItaly]

The wire isn't critic, 0.2 to 0,4 works ok, but also an antenna stylus or a brass rod works also well without coil.
Best Regards

[Avanturis]

Thank you so much Franco!!
Best regards

[mustefa ubram]

hi franco
how are you today dear ?
franco Please explain a little about the details L1?(TURN-NUMBER WIRE- Diameter OF coil-
Capacity?)
I built with wire diameter 10 mm diameter of coil 10 mm and 3round
is this correct ?

[detectoman]

in my field where i buried 30 coper coins in past months i try my pd then i take a further signal, then after i of new try my pd the signal dissapared i can understand those pd need a atmosferic conditions specifis for operation

en mi campo donde yo pruebo enterre 30 monedas de coobre, en pasados meses yo probe mi pd lrl entonces yo obtuve una fuerte señal, entonces despues de nuevo meses despues yo pruebo mi pd y la señal desaparecio, yo puedo entender que estas pd necesitan especificas condiciones atmosfericas para funcionar, tal vez aun las etapas de la luna les afecten, las alineaciones planetarias, el sol y la temporada del año

[mustefa ubram]

hi franco
how are you today dear ?
franco Please explain a little about the details L1?(TURN-NUMBER WIRE- Diameter OF coil-
Capacity?)
I built with wire diameter 10 mm diameter of coil 10 mm and 3round
is this correct ?

hi franco
i have a question

[FrancoItaly]

Hi Mustefa,
Now I'm in Italy, before I don't see your post. Yes the coil is 10mm diameter, long 10mm and 3 turns. The capacitor is 22pF but today I have used a variable capacitor 4-20pF and in the next day I go in my test field. perhaps I can discriminate gold...
Best Regards

[mustefa ubram]

Hi Mustefa,
Now I'm in Italy, before I don't see your post. Yes the coil is 10mm diameter, long 10mm and 3 turns. The capacitor is 22pF but today I have used a variable capacitor 4-20pF and in the next day I go in my test field. perhaps I can discriminate gold...
Best Regards

Tank you very much franco

[mahinda]

hi..... I am mahinda ...please send this circuit diagrams with details
thank you

[FrancoItaly]

Look here:

http://www.longrangelocators.com/forums/showthread.php?t=18933&page=9

[FrancoItaly]

Some improvements

The coil L1 is better if it consists of 2 turns and for greater sensitivity you must shield the entire box with aluminum adhesive except the cover of the input stage, as seen from the photos. The shielding must be connected to the ground of the input circuit. The handle must be at least 20 cm long with a diameter of 4 cm or 5cm, also to have maximum sensitivity you must hold the handle with both hands. The best antenna is a stylus 80cm-100cm. With 30cm it has the minimum sensitivity, the greater the length the greater the sensitivity. With these changes, it is possible to detect targets that were previously ignored, such as, for example, short time metals buried (1 month or more) in your test field.

[mustefa ubram]

The coil L1 is better if it consists of 2 turns and for greater sensitivity you must shield the entire box with aluminum adhesive except the cover of the input stage, as seen from the photos. The shielding must be connected to the ground of the input circuit. The handle must be at least 20 cm long with a diameter of 4 cm or 5cm, also to have maximum sensitivity you must hold the handle with both hands. The best antenna is a stylus 80cm-100cm. With 30cm it has the minimum sensitivity, the greater the length the greater the sensitivity. With these changes, it is possible to detect targets that were previously ignored, such as, for example, short time metals buried (1 month or more) in your test field.

hi franco.how are you ?
Congratulations Excellent.Why did you shield box?
What was the material of the box?wood or plastic?
If the box be made of wood, does need a shield?
What is your opinion on fiber Pulygan?

[FrancoItaly]

Hi Mustefa,

The material is plastic and I think that any type is fine. By shielding the LRL is more sensitive with no false signals caused by the human body and, as I said, the higher sensitivity can make the difference in whether or not to reveal the buried metal used as a test. I do not know how does the wood, but you can try.

Best Regards

[WM6]

Wood is hygroscopic and can easily change its properties.

Wood is not really suitable for such sensitive design, even impregnated and lacquered not.