If LRL works, then ONLY this way !!!

[Funfinder]

By from far away transmitters and their EM-fields created eddy-currents !!!

a localized electric current induced in a conductor by a varying magnetic field.
"When a coil of wire surrounds a ferromagnetic core, like iron, for example, of a transformer, the changing magnetic field induces an eddy current in the core, which happens to be conductive as well."

This is just a very short explanation.

Also non-ferromagnetic objects are causing eddy-currents and btw.
this is how induction balance works:

Both coils of a detector are like a transformer and the buried object acts as core.
Even mineralized soil acts like this and causes a different energy flow compared to
if there would be nothing near the coil at all (like a transformer completly without a core).


Now we have more or less powerful EM-field sources, transformer cores
(metal stuff) here and there and the LRL detector that is critical in resonance
or better said: extremly stable on the same frequency of one of those far away
EM-field sources.

What I'm doing here is trying to explain why LRL detection might
work - but on a scientific level!

Seen on a larger scale the long wave etc. radio station is the
metal detectors coil #1 and the passive receiver is coil #2.

Now, if someone walks straight into one direction,
of course always holding the coil exactly at its same place
incl. same distance from ground,
because otherwise the field strenght changes and can cause wrong signals,
the induction level of far away transmitter and almost at
the same position (seen from a real big level) staying antenna
will remain the same.

Will remain the same until some "transformer-core" = find
crosses its way or comes closer!

In this case the object distorts the "direct" energy flow from
TX to RX or strenghtens it.

Depending if the detected wave-form shifts into plus or minus
it should be possible to find out if its iron or noble metal as with
any usual VLF-device.

I know you absolutly will like this text, dear LRL-freaks ,
because now you have a scientific explanation why
some of your detectors REALLY might work.

Indeed its nothing special new, pipe-locators proven work with
this method but they don't claim to find tiny gold coins from
dozens of meters!

So the main question still is:
How weak transmitting-energy still works, how highly sensitive and
selective has to be the receiver so it catches the wanted EM-field
and not all kind of distortions and how large has to be the find so its
possible to use it as "core" and from what distance.

LRL-constructors, please do yourself and everyone a favour and
use some reliable working and very stable long-wave transmitter!
For tests it should output only the same weak amount of energy as it
remains if an usual long-wave sender from very far away would be used.

Because this is exactly what your LRLs usual are dealing with!

For initial and very simple tests place a car inbetween transmitter (must be 200 meters far away,
otherwise the extreme growing field-strenght may even destroy the sensitive detection circuit!)
and where you are standing with your detector. (don't go closer than 20meter to the transmitter
if its switched on with the detector in your hand, or it may get overloaded and damaged).

Now from 50m far away walk straight closer or 10m nearby the car and your detector
has to react absolutly with no doubt, even from 20m away, because this is a huge "find".

If you can't detect a car from 20 meters you never will detect a gold coin from 50 meters.

And stop sweeping the pistol-detector, because this only disturbs the induction-field!