MFD Frequencies?

[Geo]

Hi TIM.
Are you make a coil or you let the wire onto the soil??
If you make a coil with the 100f of wire then who is the diameter of the coil??

Regards

[Tim Williams]

The coil size does not matter. The wire is on the spool. One end is connected to the signal generator and the other 2 ends connected to rods that you insert into the ground. You use the soil to limit the current through the coil.

[Geo]

The coil size does not matter. The wire is on the spool. One end is connected to the signal generator and the other 2 ends connected to rods that you insert into the ground. You use the soil to limit the current through the coil.

Do you mean 2 starts (bridged in one) connected to the signal generator and the other 2 ends connected to rods that you insert into the ground. [/quote]

[Tim Williams]

Take one end of the 2 conductor wire and connect it to the generator. Take the other end and solder to 2 rods. I will post a picture tomorrow.

[Geo]

Take one end of the 2 conductor wire and connect it to the generator. Take the other end and solder to 2 rods. I will post a picture tomorrow.

Thanks Tim.
Who is the distance between the 2 rods???
Also... what about the common of the generator???
The idea of picture is very good

Regards

[Tim Williams]

Look at this photo. It's a coil of 16ga speaker wire with 2 brass rods. Sorry about the size.

[Geo]

Thank you Tim.
Please can you give me a photo from the other side of the connector??

Regards

[Tim Williams]

Try this.

[Geo]

Thank you

[J_Player]

What is the NMR for gold and silver and copper?

After reading above, we discovered that the nuclear magnetic frequency for different elements depends on how strong the magnetic field they are in.
So the NMR frequency will change if the magnetic field is changed.
scientists usually measure the NMR frequency in the MHz range after they put an element in a very strong magnetic field.
They do this because it is nearly impossible to measure a NMR frequency in the natural field of the earth.
They find the natural earth field is constantly changing, and it is different at every location on the earth.

But let us suppose we wanted to know how to find the NMR frequency of metals at the surface of the earth.
How would you find the frequency?
You must start by measuring the strength of the earth's magnetic field at the place where the metal is located.
You will measure a magnetic field which is somewhere between 22,000 nT and 68,000 nT.
After you have this measurement for the magnetic field, you can use the formulas at the bottom of the image below to find the NMR frequency for gold, silver, coppper and aluminum.

You can see there is a formula to calculate the gold NMR.
But the silver NMR frequency has two formulas.
This is because there are two isotopes of silver which are found in equal amounts for all the silver on earth.
This means that any silver will have two NMR frequencies which you can calculate by using the two formulas below.
Either of these frequencies will identify silver.
We see the same for copper. It has two isotopes and two frequencies.
For copper, the 63 isotope is 70% of all the copper on earth, and the 65 isotope is 30% of the copper on earth.
For copper, you are better to use the 63 isotope because there is more of it in the copper you find.

Another interesting property of these four metals it they have different receptivity values.
The receptivity is the tendency of an element to precess, or to react to the magnetic field and produce a NMR frequency.

If we consider carbon to be a standard to measure other elements against, we find that other elements will precess more easily, or less easily than carbon.
Gold has only 1/6 the tendency as carbon to precess. So we say gold has a receptivity of 0.158.
This means that it we can see carbon precessing and showing us NMR frequencies 6 times stronger than gold does.
Here are the receptivity values for gold, silver, copper and aluminum:

0.158 Gold 197
0.200 Silver 107
0.282 Silver 109
371.0 Copper 63
202.0 Copper 65
1220.0 Aluminum 27

we can see gold and silver have a very weak ability to precess compared to copper or aluminum.
The precession strength of aluminum is 4000-7000 stronger than silver or gold.
And copper has a precession strength 1300-2300 times stronger than silver or gold.
This means that if you were able to detect the NMR of any of these metals in an earth field,
then aluminum would have the strongest amount of precession and NMR signals which are thousands of times stronger than silver or gold.

This leads me to believe that MFD methods are not detecting the NMR frequency of these metals.
Because MFD methods do not detect aluminum with a signal thousands of times stronger than for silver or gold, I would think MFD is detecting something different than the NMR frequencies for these elements.

But in case I am wrong about this, you can use the formulas below to calculate the NMR frequencies.
Be careful with the chart.
This chart shows only the average magnetic field strength and the average NMR frequency found on Dec 21, 2011 in the general areas of the locations listed.
The actual frequency varies because the magnetic field you will measure in any of those locations is not the average value shown.
As an example, the NMR frequency of gold in Los Angeles can be measured to be between 22Hz and 41Hz depending on where in Los Angeles you are measuring it.
See the magnetic field map here to see how the NMR frequency can change by 10% at different locations inside a soccer field: http://www.longrangelocators.com/for...86#post=125686
The only way you can know the actual NMR frequency is to measure the magnetic field where the metal is located, then calculate the frequency with the formulas below.


Best wishes,
J_P