dear FrankoItaly
I changed
c13 = 100n
c14 = 100n
on place c2 c3 c4 is 1 single capacitor 1p
The result is 5v at output
when i touch antenna voltage rise in mili volt
i put down underground two rings of silver 20 cm depth for 15 days at home
the device detect them at 1 meter away hardly
i get out to test filed with lrl to detect 2 kilograms of copper underground since 1 year depth 25 cm but nothing happen
does your lrl detect copper ?????????
Regard