Redesign PI Detector For More Power

[zenit52]

Hi to all friends...
Deltapulse seems a good pi detector in depth and stability ...
For build a best PI detector, please anyone can explain different sections of deltapulse schematic to understanding how deltapulse circuit works ...
thanks from all friends...

[bbsailor]

Start with this

Zenit52

To understand the Delta Pulse (DP), start with reading this: http://geotech.thunting.com/pages/me...ead/HHv1p5.pdf

While the circuits are not exactly the same, there is a similarity in the functions of the main circuits.

The DP control called "noise" is the "Pulse Width" control in the Hammerhead.

Once you fully understand the Hammerhead, find the same functions in the DP. Then, you can post specific questions on this forum.

The DP is a low frequency, high power PI machine without needing a shielded coil as the delay is above 30uS and the ground signal decays before the sampling. If you want to sample below 30uS to be more sensitive to gold, then you need to raise the TX frequency, reduce the pulse width, reduce the delay and make about a 300uH shielded mono coil about 11" to 12" diameter. If none of this make sense now, just start reading Carl's article to obtain a basic understanding of how a PI works.

bbsailor

[zenit52]

Hi bbsailor and thanks for your guide...

one other question...
for more depth search, PI detector is better or 2box metal detector ???
I am waiting for answer... thanks

[bbsailor]

Hi bbsailor and thanks for your guide...

one other question...
for more depth search, PI detector is better or 2box metal detector ???
I am waiting for answer... thanks

Zenit52,

It all depends on what you are looking for; the type of metal, the size the metal, shape, and anticipated depth along with ground conditions. Once you answer these qusetions, forum members can jump in and give you some better advise.

Two-box detectors are usually used for very large and very deep targets.

bbsailor

[zenit52]

Hi dear bbsailor
thanks for your answer,

I want find treasure (gold) in medium size in the ground in depth about 3 meter...
for me depth is first important factor for my MD...
what is the best PI detector and best 2box detector to build ???
thanks...

[bbsailor]

Your First PI detector

Zenit52,

I recommend that you start with the well documented Delta Pulse (DP). There is a lot of information on this forum about the DP. Use the search feature to see all the posts that have been made about it and how to modify it.

Get the basic unit working first and gain some first hand experience with it. Then you can begin to modify it for faster speed, shorter Pulse Width and shorter delay.

Detecting gold at 3 Meters is a challenge. You would need a very large coil (1 to 2 meters in diameter) and would need to know the possibility of very large gold objects being in the location that you search. You will be excavating a very deep hole just to find an old metal can. The DP PI machine does not discriminate.

Research all the Delta Pulse posts on this forum and then ask specific questions. I don't think any PI design will reliably find gold at 3 meters deep no matter what the advertising/marketing people say!

Remember that the higher power in the coil creates a very high flyback pulse that must be absorbed and die down before sampling can occur. This is the basis of how PI detectors work. High sensitivity to certain metals (gold nuggets) occurs when sampling sooner. Some machines use a brute force method, more coil power like the Delta Pulse and other PI designs like those designed by Eric Foster use high frequency (3K PPS to 10KPPS) and low coil power to allow sooner sampling resulting in higher sensitivity.

Once you understand the difference between low frequency (low PPS) PI designs and high frequency (high PPS, Pulses Per Second) you can then decide which design will suite your needs. This forum has a wealth of PI design information that will help you understand the PI designs that will be best suited for your needs. I caution you that finding gold at 3 meters is a nice dream but something that most PI designs currently cannot reliably do.

Maybe you could locate a large treasure chest full of large gold objects at 2 meters, but you will be digging many deep holes before you find the treasure, if there is any.

bbsailor

[michael]

Hi dear bbsailor
thanks for your answer,

I want find treasure (gold) in medium size in the ground in depth about 3 meter...
for me depth is first important factor for my MD...
what is the best PI detector and best 2box detector to build ???
thanks...

Hi man, of course in this forum are many experienced members who mostly and unfortunately prefer only read others statements and never transfer their experiences even for one time ( just receiver guys= miser) I really hate this kind of damned characters.

I saw your request couldn’t abide and felt necessary to tell you;
If you want find treasures at great depths two boxes are good but if digging for many of mineralized grounds is not important for you.
i.e. before nailing treasure you should dig many empty holes.
with a good PI certainly you will have less empty holes.
If you look for best PIs, I own it, but unfortunately is single and many of people here know this and surely did their best to find any clue of maker.
go and see here: http://thunting.com/geotech/forums/s...ad.php?t=14321
Absolutely it's a fabulous feat in MDs world.
It will find your treasure fast and very easy like drinking a glass of water.
If found maker do favor and inform us ( this is the least and the most easy you can do).

[zenit52]

Hi friends,
one question?
did one VLF detector can search as deep as one PI detector or BFO detector?
if no, how we can improve one VLF to search very deep ???
PI detector is good but it isn't discrimination...
let's design a powerful signal generator for vlf tx coil !!!
have any idea ?!!!

[simonbaker]

Hi friends,
one question?
did one VLF detector can search as deep as one PI detector or BFO detector?
if no, how we can improve one VLF to search very deep ???
PI detector is good but it isn't discrimination...
let's design a powerful signal generator for vlf tx coil !!!
have any idea ?!!!

Maybe need two detectors -- PI to locate target. Then very slow response, large coil VLF to try to discriminate. A good area to experiment. Maybe would work on easy beach sand, but deep mineralized soil probably always a problem. Aziz maybe will find a way with power computing techniques.

Cheers!

-SB

[Aziz]

Hi simonbaker and others,

Maybe need two detectors -- PI to locate target. Then very slow response, large coil VLF to try to discriminate. A good area to experiment. Maybe would work on easy beach sand, but deep mineralized soil probably always a problem. Aziz maybe will find a way with power computing techniques.

Cheers!

-SB

Well, indeed, I am just trying to learn about PI detectors. VLF type detectors have quite critical coil specifications, which I couldn't meet yet. I got a very sensitive VLF detector but also very sensitive to disturbing effects.
So therefore I am focusing only on the PI technology and the coils for this type of detector are not much as critical as for VLF's.

The lock-in amplifier and boxcar averager basics will help to improve PI detectors. Look at bugwhiskers project on the other forum. It uses already such techniques with minimum of effort and complexity. It is quite interesting field.

Regards,
Aziz