Dear teachers, please comment

[jack]

hi to all
This is a VLf receiver circuit.
I want to know you can help the client to the remote location of metals in soil?
What works in the frequency of this receiver???
Can be used instead of the telescopic antenna for greater sensitivity of the antenna coil?
with respect
jack

[jack]

and this is diagram from vlf reciver

[WM6]

Originally Posted by jack

What works in the frequency of this receiver???
Can be used instead of the telescopic antenna for greater sensitivity of the antenna coil?

Instead of telescopic antenna you ca use more directive ferrite antenna as on drawing.

Frequency in VLF band is of your choice, you can set it by proper Lx and Cx. Use one of online resonant frequency calculators.

[jack]

Originally Posted by WM6

Instead of telescopic antenna you ca use more directive ferrite antenna as on drawing.

Frequency in VLF band is of your choice, you can set it by proper Lx and Cx. Use one of online resonant frequency calculators.

tank you wm6
Please help me for the amount of lx and cx?
Work on what frequency?

[WM6]

Originally Posted by jack

Please help me for the amount of lx and cx?
Work on what frequency?

If you wound Lx to 57mH then

with Cx of 100uF you get 66Hz and

with Cx of 1uF you get 666Hz and

with Cx of 10nF you get 6666Hz and

with Cx of 100pF you get 66666Hz and

so on.

You should try different capacitors to establish best detecting frequency in your location.

[jack]

Originally Posted by WM6

If you wound Lx to 57mH then

with Cx of 1uF you get 666Hz and

with Cx of 10nF you get 6666Hz and

so on.

You should try different capacitors to establish best detecting frequency in your location.

Whether this receptor reveals small objects of gold?
How do I test this circuit?
If the antenna is wrapped as a Tesla coil?
c2 and c1 Should remain in cicuit?
What state is called the frequency?

[WM6]

Originally Posted by jack

Whether this receptor reveals small objects of gold?
How do I test this circuit?
If the antenna is wrapped as a Tesla coil?
c2 and c1 Should remain in cicuit?
What state is called the frequency?

Not suitable for small object, only for bigger deposit of metal in soil.

[jack]

How do I test this circuit?
If the antenna is wrapped as a Tesla coil?
c2 and c1 Should remain in cicuit?
What state is called the frequency?
Whether a new metal in the soil will?