[jack]

Originally Posted by WM6

Yes, C1 and C2 remain in circuit.
It is the same if metal is new buried or old in soil.
It works as VLF receiver of Earth signals.
For other answers read this whole thread again:

http://www.longrangelocators.com/for...ad.php?t=18419

tank you very much wm6
I read this thread.But did not answer the question:
1-What state is called the frequency?
2-If the antenna is wrapped as a Tesla coil?
3-This circuit can not detect metal with dimensions 20 * 20?
With great respect for your professor wm6