A VLF RECEIVER

[Dell Winders]

For what it is worth, it is pleasing to see you cooperating and working together in friendship. With my best wishes. Dell

[Fred]

Originally Posted by Dell Winders

For what it is worth, it is pleasing to see you cooperating and working together in friendship. With my best wishes. Dell

Thanks Dell,
Apreciated.
Regards,
Fred.

[Fred]

An interesting circuit...

Regards,
Fred.

[Qiaozhi]

Originally Posted by Fred

An interesting circuit...

Regards,
Fred.

I hope the antenna is not mounted on a long pole, otherwise you could get more than you bargained for!

[humhum]

Borrowing:

Gold has an NMR frequency of 1.754MHz relative to hydrogen @ 100MHz, which establishes the test magnetic field at about 2.35T. The Earth has an average field of about 50uT, so buried gold would have an NMR frequency of about 37Hz. Someone please correct me if I'm wrong.

[Alex]

Fred in your Vu meter there are 3 components with name missing.Please add the name so we can make it.Thanks

DELL thanks for your participation here.Nice from you.

QIAOZHI .I select this kind of receiver for you use a telescopic antenna up
to 6 foot so is light and easy to cary..There are many models but usualy they
have heavy antenna ..

HUMHUM.
I can't aswer your question .My intention is to ,,cach'' the molecular
frequency of gold and silver and Carl said is 5khz and 8,7 khz.
This property is used also in medicine to detect presence of parasites ,bugs or diseases in human body .In this way maybe we can detect not only old
buried gold or silver but also a new one.
Thanks all.

[Fred]

Hi Alex,
Sorry,here you go.
Also includes a different PCB.This one use individual leds.
Regards,
Fred.

[Max]

Originally Posted by Alex

Fred in your Vu meter there are 3 components with name missing.Please add the name so we can make it.Thanks

DELL thanks for your participation here.Nice from you.

QIAOZHI .I select this kind of receiver for you use a telescopic antenna up
to 6 foot so is light and easy to cary..There are many models but usualy they
have heavy antenna ..

HUMHUM.
I can't aswer your question .My intention is to ,,cach'' the molecular
frequency of gold and silver and Carl said is 5khz and 8,7 khz.
This property is used also in medicine to detect presence of parasites ,bugs or diseases in human body .In this way maybe we can detect not only old
buried gold or silver but also a new one.
Thanks all.

Hi,
no you misunderstud... 5Khz or 8.7Khz are not magical frequencies for gold... or anything... some CLAIMED LRL uses similar generators... 5Khz square wave cause of pseudoscientifical theories about "special" frequencies to detect particular metals etc... but these are absolutely fake informations.

So called MFID or MFD devices are claimed "multi frequency identification" or "multi frequency discrimination" but just cause they wanna emulate the famous Minelab terminology about multifrequency in PI detectors that really work.

These magnacast etc or other stuff claimed of long range MFD / MFID are fake devices for wallet mining!

It's the same when Mine-oro emulate the Mine-lab firm... using the same Mine... BUT finding Mines just in wallets of customers !

Be aware of those... or you'll waste money for nothing!

Kind regards,
Max

[Max]

Originally Posted by humhum

Borrowing:

Gold has an NMR frequency of 1.754MHz relative to hydrogen @ 100MHz, which establishes the test magnetic field at about 2.35T. The Earth has an average field of about 50uT, so buried gold would have an NMR frequency of about 37Hz. Someone please correct me if I'm wrong.

Hi,
well maybe calculation is good... I didn't check it... but NMR data collecting is possible when the target is inside the coil... not outside...

The problem is that even a big gold target will generate so small decaying Larmor compliant precession signal that you will not be able to "read" with a coil from far away few distance.

You need a static magnetic field (in your idea it's the Earth's magnetic field you said) and a perturbing magnetic field orthogonal to the first.

You need them PERFECTLY orthogonal, you need to apply well known field intensity to align particles (nuclei having a magnetic moment if you really want do NMR) and then shut down and let them precess at required frequency.

Then you read the signal by a e.g. an rx coil... or just measure e.g. absorbtion of energy at this particular frequency (nmr related loss).

A thing you must consider is the energy required to do so with macroscopic objects is really enormous and you will probably need some 1-10 tesla induction system (using superconductors and "small" portable power source I think... for portable unit .... say you need maybe from 10KW to 1MW power depending on conditions... just to supply the coil... then a dynamic platform that will align coil orthogonal to soil... uhm seems science fiction now....? )

Seems not an easy project... so good luck!

Kind regards,
Max

[Max]

Originally Posted by Qiaozhi

I hope the antenna is not mounted on a long pole, otherwise you could get more than you bargained for!

I saw an old project for a storm detector in old "modern" mechanics maybe... but the risks are about the same!

Like the X-ray and laser projects... it seems good to toast something... or someone!

Kind regards,
Max