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]

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]

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]

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]

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]

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?

[WM6]

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?

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/forums/showthread.php?t=18419

[jack]

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

[WM6]

1. I do not understand your question, dear academic.

2. Ferrite antenna is wrapped as ferrite antenna (here with more turns).

3. 20x20 plate can be detected - at which distance depend on many factors as tuning at best Earth signal frequency, target orientation and position regarding signal source, signal beam input and reflect angle etc.

Here we can detect by signal changing on signal reflection and by signal shadow.

[jack]

1. I do not understand your question, dear academic.

2. Ferrite antenna is wrapped as ferrite antenna (here with more turns).

3. 20x20 plate can be detected - at which distance depend on many factors as tuning at best Earth signal frequency, target orientation and position regarding signal source, signal beam input and reflect angle etc.

Here we can detect by signal changing on signal reflection and by signal shadow.

tank you dear wm6
1-It reveals the basement rocks and the hard parts?
2-Whether general, non-metallic objects in the basement of their frequency, they produce?
3-What is the best operating frequency is called frequency in this circuit?
4-What is the construction method of testing the circuit?
With great respect for your professor wm6

[WM6]

tank you dear wm6
1-It reveals the basement rocks and the hard parts?
2-Whether general, non-metallic objects in the basement of their frequency, they produce?
3-What is the best operating frequency is called frequency in this circuit?
4-What is the construction method of testing the circuit?
With great respect for your professor wm6

Dear colleague professor jack.
My English is too poor to understand all your question.
The best way to get answers is to build one (parts needed are very cheap) and test it.

[J_Player]

tank you dear wm6
1-It reveals the basement rocks and the hard parts?
2-Whether general, non-metallic objects in the basement of their frequency, they produce?
3-What is the best operating frequency is called frequency in this circuit?
4-What is the construction method of testing the circuit?
With great respect for your professor wm6

Originally posted by WM6
Dear colleague professor jack.
My English is too poor to understand all your question.
The best way to get answers is to build one (parts needed are very cheap) and test it.

WM6 is correct.
This detector is a VLF receiver which has been modified to use a ferrite loop.
The original design before the Arial version or the ferrite probably used an air coil loop.
VLF receivers are known to be good to map buried objects which are large, such as large rock formations, or sometimes very large objects such as a buried car.
The ferrite modification is expected to modify this detector to allow finding smaller objects. It may also reduce the maximum range of detection.

All of the VLF locator projects we see in this forum are only experimental designs which people build to see if they can improve the performance of a vLF receiver so it can be used to locate smaller metal objects from a distance.
None of these have been shown to have any consistent abilities to find buried jewelry or treasures. They are simply experimental projects to try to see what we can find.
There is no data base for what depth we can expect for the design shown above, because the performance depends on the details of how the circuit is constructed and how it is used.
And the performance also depends on what kind of soil it is used in and what is the moisture content, and what VLF/ULF noise happens to be in the area where you are hunting.

The only way to know how this circuit works is to build it and test it to see for yourself.
If you are not satisfied with the test performance, then you can modify the circuit to see if you can improve it.
This is what every other experimental VLF project builder here does.

Best wishes,
J_P

[jack]

tank you dear j-p and wm6
Are the frequencies of all elements of their basement?
Are Sense and it is by the vlf reciver?
Frequency difference between metals and other elements in what is understood and how?
Do you have metal in the basement, each with a specific frequency?
In what part of the circuit operating frequency can be measured with a frequency counter?
with respect
jack