Best discriminating pi for LARGE loop?

[pml]

My friends built a few limited of Luminous and when was near to be disclosed their activity by intelligent service, they stopped. Because producing such detectors are illegal too.

You have my curiosity now. Why would such a detector be illegal and are you certain of this? Does this law also apply to U.S. inventors?

I should add; my PI discrimination is not the same you mean or has been meant in MDing discrimination. It has not ability to reject iron or any thing else Just after finding a single metal is able to tell its gold or not with 100% reliability.

You mean it can tell the difference between say copper and gold regardless of the shape and size of the pieces?


Paul

[Darren in NC]

Okay, I need the forum's help. Let's make a list of well known pi's that can be used with a large loop. Please list the common name of the pi (commercial and homemade) and it's qualities. Here's a list to start with. Please add to it or make corrections...

Lorenz 5, PICs, discriminates ferrous and nonferrous

Pulse Star II, PICs, discriminates ferrous and nonferrous

DBP2010, Analog, discriminates ferrous and nonferrous

Delta Pulse/XR71, Analog, no discrimination

Stuart, PICs, discrimination???

ClonePI, ???

PD3200, PICs, claims of VLF type discrimination

Gold Pic 3, Can this be used with large loop?

Superscan, ??? (Eric Foster's PI no longer made)

SSP-3000, ???

SDP-2014, ???

Gary's PI 2, analog, no discrimination

Gold Fish 2, ???

[michael]

1-You have my curiosity now. Why would such a detector be illegal and are you certain of this? Does this law also apply to U.S. inventors?
2-You mean it can tell the difference between say copper and gold regardless of the shape and size of the pieces? Paul

Mr. Paul,
1- No. I mentioned here (Wherever we do treasure search in an area in Middle east) of course in USA is not illegal. Here every kind of powerful MD is illegal because treasure hunting is illegal and forbidden.
2- No.it can say only is gold or not. other metals being introduced as iron.

[pml]

Thanks Michael. Sounds like a nice machine your friends made for you!

Regards,
Paul

[Darren in NC]

Michael,

I (and others, I'm sure) would be interested in pictures of your pcb inside your detector. Thanks for offering them

Best,
Darren

[michael]

OK. I will do my effort and try it. I wish can be a good help.

[pml]

Last year the internet is full of PI with discrimination but where are these fantastic devices? Maybe they don't like to make money.

Personally I wish things were as simple as making money if you have a better device. It's always been my experience that once you have a top product that you're only half way there. The other half is marketing and hustling your product. I bet Minelab is worth some money, I guess, but just because he had a top product / breakthrough did not mean the money just rolled in his back account. It's been a long road for the owner of Minelab. Tons of effort, time, and capital. That's what unusually happens. I'm sure there's always the exception.

I think Eric has a great and valuable PI detector. I'm thinking he could tell you that the money isn't soaring in.

my 0.02
Paul

[michael]

Excuse me I tried but couldn't take better or useable Graphics. the formation of unit didn't allow me do it properly. Please pardon me for bad quality.

[michael]

these three from its' panel. I am sure there is no technical note can be as a help.

[Darren in NC]

Thank you very much, Michael. The pictures aren't too bad at all If you're concerned about quality up close, then most cameras have a button with a flower icon that will let you take close up pics.

Your unit has a module board on it above the main pcb. My guess is that the module allows for the discrimination. Thanks again. More pictures, please? Maybe a picture of the whole machine?

Best,
Darren

[michael]

OK Darren, this more pictures for you, but can they be really useful??!!

[ivconic]

Women, detectors and nuts....


"...Ivconic has a pulse star ii that can discriminate but he like to work with delta pulse
that can not discriminate. Why????..."
In the past i worked with some Lorenz(right now i can not tell wich model)it was some nice PI,
only thing i remembered that it has blue led on front panel,vu-scale,and pleasant tone.Also
it used THE VERY SAME COILS and coil holder as my present PSII now!? This leads me to idea that
PS II manufacturers made nice machine,relying on Lorenz coil specifications,and also that PS II
machines are much younger than LOrenz's.(LOrenz is a big daddy, PS comes later with respect).
That Lorenz costed at the time $7000...(1993/94)...Later,when i became happy owner of PSII,i
got with it the very same 45cm coil and holder!? I am not sure at all,but i think that Pulse
Star manufacturer is smaller,independent, "newbie",showed on the market in last 8-9 years,and
Lorenz iz very old,famous,very well known,big and very serious firm. I might be wrong on this
so excuse me on that.
Anyway....about PI discrimination....I am not sure that PI's can discriminate even close as IB's
For my account,they do not need to disc. at all! PI's are superior on depthts over any other
type of md, and that is what makes them very interesting! Besides, i am visiting very far sites,
deep in mountaines,non-trashy areas where is not to be expected so much trash like on other
fields.And also, when your PI "beeps" where ordinary IB can not detect anything, it means
only one thing, item is deeper and in huge percentage is not trash for sure! In that case
you gonna dig it anyway, is it iron or gold - no difference, it supposed to be very old and
very interesting for sure!
PS II is very nice machine, I do like it very much! But as i made Delta Pulse(so far 3 pcs),and
it showed very good performances,comparing to my earlier experiences, and it costed me just a bit
over 120 euros per piece - it becames much better solution in further than PS II, due to PS II
price i can achieve if selling it. I can sell it now for 1800-200 euros here, at my place.
And this mean that i am gonna save much money with Delta Pulse....
Trust me or not, but Delta Pulse showed exact the same results on the field as PS II!
Discrimination is poor in both models(who need it anyway)....
I am used to have with me 2-3 machines when go outdoor on the field. When need discrimination,
i can use Garrett GTI2500 or some Fisher or Minelab or White's, but when want to go deep i can
use DP and PSII(for now)....So i do not have any dilemma!
Man should not stick to one detector(and one women) at all(one type of md).If you consider
yourself as a serious prospector than you should have at least 2 machines with you always!
Trust me on this!
Ha,ha,ha....than Carl with his collection is The King of all prospectors ever !!!Only problem
is that he should use truck for them,when go prospecting!Forebear of prospecting!lol

But anyway.Humor aside. This was only my attitude on this subject.You should establish your
own way,habits and opinions on that.Much of it depends of terrains you using to visit.Are
they trashy or not.What are you looking for? How deep?How fast?etc.etc.

DO not bug your self with PI coils.PI coils are not such secret as IB coils, at all...
What you need is a good machine! If you can not make DP, than buy PS II or even better some
Lorenz.Also i heard that E.Foster's Goldscan IV is a very good machine!
that was all for now...be cool,take it easy...
best regards

[Darren in NC]

Thanks, Michael, for the pictures...and Ivconic for the explanation

[Geo]

Hi to all.
Maybe you have right maybe not.
Simple, read this...

Finally, Discrimination on a PI
Due to the nature of the signals caused by different objects, it is extremely difficult, or put another way, almost impossible to build a good discriminating PI.
Since the time it takes for a target signal to decay can vary because of the size, shape, and chemical makeup of the object, then any type of later sampling will not produce a reliable form of discrimination.
Many PI's rely on the ability of an adjustable delay whereby the operator can simply adjust the delay longer to see if an object is a piece of gold or not. If the delay is increased and the signal from an object disappears, then the operator can assume the object is made of a lower conductive material such as gold. This is acceptable for those hunting something like gold rings, but does not work well on gold nuggets. larger gold nuggets can produce a much longer delay, so any attempt to use this delay technique will result in one thinking a large gold nugget to be junk.
Another concept used on a PI for discrimination is to sample during the "on" time of the pulse. Any target will produce a slight change in the signal seen at that time as well as a change when the normal target sample is taken.
If the analysis is done correctly, then one can use both the "pulse on" and "pulse off" signals and get a better analysis of a target. This type of design can lead to a better form of discrimination. However, few if any PI's are actually using this technique.
Regardless of the technique used, no form of discrimination is perfect, and, most likely, never will be. Some techniques are better than others, but all can be fooled, and this is true of both PI's and VLF's.

By Reg Sniff
Copyright 2003 The author reserves all distribution rights.

NUGGETSHOOTER HOME Now where is the true?? I don't Know Regards

[Lake]

ClonePI-M

What is this then?
http://fandy.front.ru/ClonePI.htm

This seems quite unclear.. translator didn't translate this very well.
Which microcontroller should be used with discriminating ClonePI-M?
18F252 or 16F873 like in schematics?? Layout is a little bit different on upper picture than ClonePI-M..