Specific Frequencies For Gold

[WM6]

simple like that!

Not really, this is magic millennium hidden knowledge known only to biggest dowser.

[Alexismex]

Hello Forum,
" If we continue to think that a better circuit will process a weak signal, there is a point of diminishing returns, a gold ceiling as it were."
You are right Wyndham I have the same idea ,
we make a lot of effort in the front end of the pi detector but also we forget COMPLETELY in all PI the audio part ....always very basic and poor audio design in all pi and also all Vlf....
YES , the design of the circuit audio part of ALL PI ARE VERY POOR ....always the same base ....we forget this VERY IMPORTANT PART of a metal detector ....I do not have a good background electronic to design audio circuit but for the guys who are good designer i would say to thinking the audio part circuit like a synthesizer with delay etc....
Actually i am studying a very powerful (and crazy !!! to blow your head) program (PURE DATA) specially powerful in audio circuit , and perhaps for me the future in designing a complete detector ... i can see how it is powerful the manipulation of audio with mathematics etc... filters, delays, echo, loops etc....
and the comment of Wyndham it is sure with a good front end (Thinkerer) and a complex audio analysis you can discriminate 100% the small part of Gold over the iron .

[WM6]

H
we make a lot of effort in the front end of the pi detector but also we forget COMPLETELY in all PI the audio part ....always very basic and poor audio design in all pi and also all Vlf....
.

I agre with you Alex, except those "all Vlf".
As example I can state here my Whites Matrix M6 with his Tone ID:

It has 7 tone I.D. No need to even look at the display. Just listen for the sounds you want to dig.

The VDI ranges and the corresponding tones:

-95 = 57Hz (Low tone)
-94 to -4 = 128 Hz
-5 to 7 = 145 Hz
8 to 26 = 182 Hz
27 to 49 = 259 Hz
50 to 70 = 411 Hz
70 to 95 = 900 (High tone) Hz

[Alexismex]

Hello WM6
Perhaps i do not explain me welll,
It is not to give a certain fcy tone to each (they will make you crazy!!!) it is not that !!!, i know this technique ....
It is how you can enhanced the sound, filter it , improve the attack delay response etc.... to give us more subtility in sound audio for our hears and to give the possibility for our brain to analyze better the target...from the audio signature....
But for to explain me better in the world of audio amplifier to listen home music , you have a lot and for the same amplifier of 2 X50W you can pay 50$... 100$ ...1000$ or 10000 $ o more !!!! what is the difference ...here is the point and for all the metal detector you have always a audio section very poor with a 386 or1 transistor or 2 common transistors, etc... like if you buy a amplifier of 10 $...
Here is the point , no design to dynamic response ,filtering etc.... i do not want a esoteric audio system of 10000$ box in my detector but just a much better audio circuit .... see the minelab audio circuit ??? and they have a lot of engineers working???

[jwms]

New to the site and have had a blast going through all of the threads that have caught my attention. I thought the frequency question was as realized at the end. (NMR is interesting and should be on its own thread.) But as I understand it, the PI is a pulse (read spike), not a sinuous wave. When the spike is sent out, the PI waits for a bit , then looks for a signal from the coil; it samples a window of time. In my way of thinking, it would not make any difference how fast the pulse rate was as long as it did not get so close as to start the pulse during the sample time. Am I correct?

[Qiaozhi]

New to the site and have had a blast going through all of the threads that have caught my attention. I thought the frequency question was as realized at the end. (NMR is interesting and should be on its own thread.) But as I understand it, the PI is a pulse (read spike), not a sinuous wave. When the spike is sent out, the PI waits for a bit , then looks for a signal from the coil; it samples a window of time. In my way of thinking, it would not make any difference how fast the pulse rate was as long as it did not get so close as to start the pulse during the sample time. Am I correct?

Perhaps you should get yourself a copy of "Inside the METAL DETECTOR", and many of your questions would be answered.
Inside the METAL DETECTOR - Published September 2012

[jwms]

Waiting for the book to come. I replied mostly because it seemed to be a reasonable question that started the thread, but then took a nose dive into the realm of mag res. As being new to the site and do not know the community at all, it may take time to learn who in the community are broad minded and reasonable and those few who may be "eccentric." Just as in a community you have leaders and knowledgeable people, you also have those that seem to get stuck in a rut. They may be smart in some things but are "way out there" in others. Really enjoying the site. Thanks to all for your input and willingness to help all of the rest of us. GREAT WORK EVERY ONE. That goes to the eccentric ones as well. You sometimes make us think and/or laugh, which is good for all of us in the long run.

[Carl-NC]

"Frequency" as applied to VLF correlates with the sample delay in PI, not the pulse rate.

[cajajuarez]

how can i make a geolocator 3g?

[Orbit]

http://www.youtube.com/watch?v=a1-UAY3FKug
if you need this? http://www.planeta.rs/07/06pronalazastvo.htm
is gunpowder , gold
silver ,
buried people
in accidents etc,etc !

[Orbit]

[Qiaozhi]

This is LRL/dowsing nonsense, and does not belong on Geotech. We no longer discuss these subjects here.
Please go to www.longrangelocators.com

[Orbit]

ok good Master !