New detecting method?

[WM6]

I believe that 50W is a must for long range detection when using a receiver.


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50W? Do you intend to sense gold from home on other hemisphere?

0.3W can be here far enough to reach way deeper than signals from former navy stations.

Secret is not in Tx electronic and its Watts but in proper build Tx antenna for ULF/VLF band.

[g-sani]

to g-sani
the article says:
A new type of magnetic field detection system, which can operate at a frequency below 1 kHz, is proposed and developed. The system consists of a 40-turn-coil to generate the magnetic field and a magneto resistive sensor to detect both the amplitude and the phase signal of the magnetic field induced by eddy-current and magnetization of the samples. The magnetic field detection of ferro- and non-magnetic samples using the system is demonstrated and discussed.

accidentaly , last days I made a receiver 100Hz-11Khz
if you find a operator uder 1Khz , maybe I say maybe ....or if someone can give us a design????
να τα παντρέψουμε , τι λές Γιώργο ?
friendly , epitopios
σε Π.Μ.

Well epitopios something like gold gun comes up to my mind.
I don't know, people involved in electronics can tell us more.
In Greece they say that 20Khz is allright for a receiver to be used for treasure hunting since there is transmition over here in this frequency.
The thing is you have to know what the meter is reading plus learning to read the audio signal is important as well.
VLF transmitters are not an easy subject when to be used for treasure hunting.
Many years back I used a AL718 and I was suprised to see that it was
responding in a known target(50kilos) of copper wire from 50mts away.
Then it was many VLF stations in use for Navy but now there are not.
I have it always in my mind as a problem to be solved in order to use my AL707 properly but I always hold back until I can see something serious as a solution.Okm sells 10Watts VLF Txs for big money.
I believe that 50W is a must for long range detection when using a receiver.
Any possible help in that is welcome.

[J_Player]

to g-sani
the article says:
A new type of magnetic field detection system, which can operate at a frequency below 1 kHz, is proposed and developed. The system consists of a 40-turn-coil to generate the magnetic field and a magneto resistive sensor to detect both the amplitude and the phase signal of the magnetic field induced by eddy-current and magnetization of the samples. The magnetic field detection of ferro- and non-magnetic samples using the system is demonstrated and discussed.

accidentaly , last days I made a receiver 100Hz-11Khz
if you find a operator uder 1Khz , maybe I say maybe ....or if someone can give us a design????
να τα παντρέψουμε , τι λές Γιώργο ?
friendly , epitopios
σε Π.Μ.

Hi epitopios.

There is no circuit shematic showing components or values.
The designers from the Okayama University gave this vital information that explains the technique to discriminate metals:

[epitopios]

to g-sani
the article says:
A new type of magnetic field detection system, which can operate at a frequency below 1 kHz, is proposed and developed. The system consists of a 40-turn-coil to generate the magnetic field and a magneto resistive sensor to detect both the amplitude and the phase signal of the magnetic field induced by eddy-current and magnetization of the samples. The magnetic field detection of ferro- and non-magnetic samples using the system is demonstrated and discussed.

accidentaly , last days I made a receiver 100Hz-11Khz
if you find a operator uder 1Khz , maybe I say maybe ....or if someone can give us a design????
να τα παντρέψουμε , τι λές Γιώργο ?
friendly , epitopios
σε Π.Μ.

[Seden]

New Detecting method

By typing in the title on Google, I found enough of the article here via Google Books that explains the tests with a schematic and graphs of the results. Wow, very interesting and nice to have a new idea for our hobby.

SWR take this very seriously.

Randy

[g-sani]

http://iospress.metapress.com/content/q767074h6n070577/

I found this page accidently and I thought lets have a look because it is something coming from a University and I tried to read the concept but I couldn't.
Do you have to pay for it? This is what I understood.
May be I am wrong.