Real clone Alonso-PD

[ANDREAS]

Hi Andreas,

Between PD and the Crypton, which is better in terms of range of detection?

Regards...

Hi aulook
we have two units with different philosophy. I cannot find something same, only alarm circuit is same
My opinion. Many -many engineers try build alonsoPD withouts results. Only a greek engineer build a PD (name magicPD), but he use only receiver helthkit with a big ferrite (without feritte-coils) and maybe have small results.
Few months ago, i build an other myth (name englishPD) with perfect results. In this case i use a special feritte, because englishPD the secret is the special feritte.
Now i can see AlonsoPD and english PD has same philoshophy (method detection).
If i understand well ..what happen inside , for me is possible 30% build a PD only for gold.
I have a personall theory, but sometimes i have not answers for my questions.. who knows!
I know only one now, this extreme units need special CAD labs for produce same results. In this case i understand well now, why amateurs cannot build, but only with luck sometimes build a real unit.
regards

[Fred]

Thanks Andreas.
As I said before, and by your observations, it also looks like the PD could work on the fluxgate magnetometer principle...
Some said that the magnetometer effect should be nulled out to "work" properly.
However, the main question remains: What is "working" ...

Hi Fred
Yes this unit has something special. With this special null, unit detect very easy magnetic piece. My first experiments, unit detect very easy aluminium piece 6 meters distance, 30cm depth (i don't know how old is this alu-piece) and the strange for me.. if detect magnetic-piece unit stop detect magnetic lines from earth.
Joke is ... with perfect calibration all together coils-housing detect one euro ONLY 12CM DISTANCE.
I remember some members say here.. unit can detect a coin 20,30,40..cm distance. Maybe detect capacitor-phenomenon via hands and believes detect coin, because if don't make fine calibration produce this capacitor phenomenon.
For me this unit has many interest points and work same method other unit "name englishPDfor gold"
I try find free time and fine weather for external tests
regards

[Goldmaxx]

I know only one now, this extreme units need special CAD labs for produce same results. In this case i understand well now,
why amateurs cannot build, but only with luck sometimes build a real unit.
regards

Hello Andreas
I like your project and would like to add something.
I'm no electronics expert, but with CAD its not a probem and can help you.
If it is helpful, I can construct you a 3D model with exact data of the Clone AlonsoPD with all what you need and place at to disposal here in the forum.
So it could be everyone watch, or measure it himself.

What do you think, that would be a helpful?

Best Regards
Goldmaxx

[ANDREAS]

Hi Goldmaxx
I like your project and would like to add something.
This is not my project , i build only a real clone
I'm no electronics expert, but with CAD its not a probem and can help you.
Thank you very much about your help. I have not problem with CAD, because it's my job, the problem (not for me), but others members is.. they have not machines work via CAD for build materials
If it is helpful, I can construct you a 3D model with exact data of the Clone AlonsoPD with all what you need and place at to disposal here in the forum.
So it could be everyone watch, or measure it himself.
In this case i think you need a cdr file (corel) by me and with this file you can make a 3D model for. I think this 3D model can be helpful more members
regards

[Goldmaxx]

Hi Andreas

Thank you for the quick response.
I can construct 3D CAD model and create a 3D pdf file from this model.
A 3D pdf can anyone who has the adobe reader (latest version) installed open and watch it.
You can rotate the model, zoom, represent parts in show or noshow and the most important, measure the parts and distances.
I think it is helpful for anyone here in the forum.

In this case i think you need a cdr file (corel) by me and with this file you can make a 3D model for. I think this 3D model can be helpful more members
regards

Yes, to create a 3D model, I need cdr files or drawings with dimensions from you.
If it is helpful, and it's okay for you, I will send you my email, so can you send me the data.

At that time, I've made for the Totem casing one.
I post it here again, and you can test it.

If you open it, first click with the left mouse button on the image to activate it and then you can rotate it with the left mouse button and zoom with the right, or scroll wheel.
At the top of the screen is the toolbar, you'll find all the tools to measure, make cuts and everything else.

Have fun with it.

Regards
Goldmaxx

[LRLMAN]

PD

Hi Fred
Yes this unit has something special. With this special null, unit detect very easy magnetic piece. My first experiments, unit detect very easy aluminium piece 6 meters distance, 30cm depth (i don't know how old is this alu-piece) and the strange for me.. if detect magnetic-piece unit stop detect magnetic lines from earth.
Joke is ... with perfect calibration all together coils-housing detect one euro ONLY 12CM DISTANCE.
I remember some members say here.. unit can detect a coin 20,30,40..cm distance. Maybe detect capacitor-phenomenon via hands and believes detect coin, because if don't make fine calibration produce this capacitor phenomenon.
For me this unit has many interest points and work same method other unit "name englishPDfor gold"
I try find free time and fine weather for external tests
regards

Andreas, how many centimeters has a 1 euro coin?

one of the two units that I have built, only detected a silver coin of 3.5 cm diameter to 15 or 18 cm away from the coil in the single mode omega.

This unit is it only has a PCB because the 6 PCB alonso unit can't detects more distance for the coin.

[LRLMAN]

Andreas, how many centimeters has a 1 euro coin?

one of the two units that I have built, only detected a silver coin of 3.5 cm diameter to 15 or 18 cm away from the coil in the single mode omega.

This unit is it only has a PCB because the 6 PCB alonso unit can't detects more distance for the coin.

This is the type of the coin, that I say is the biggest on image in the left side

[LRLMAN]

This is the image:

[LRLMAN]

My PD

Andreas, Another thing, the omega coil that I did, have the followings sizes :


TX: 8.5 cm diameter with his small center of the omega have 4 cm diameter
magnet wire of 0.30 mm (0.29 mm here in mexico) with series 9+6+5+9 turns.

RX: 4 cm diameter, with magnet wire 0.20mm with 26+26 turns.


The turns that I put to the TX and RX antennas, was because morgan gave the values measured in ohms and only with those amounts of turns and the measures of wire magnet i could get that values, I could never get those ohmic values with the type of magnet wire and amounts of turns that morgan said.

[Dave J.]

Interesting post, Fred (fluxgate mag)

Back in the 1980's I build a bipolar pulse induction metal detector that worked fine with an air core searchcoil. I replaced it with a ferrite rod "probe" type searchcoil and was surprised to discover that it had become very sensitive to earth field-- I'd inadvertently constructed a fluxgate magnetometer.

--Dave J.

[ANDREAS]

Andreas, how many centimeters has a 1 euro coin?

one of the two units that I have built, only detected a silver coin of 3.5 cm diameter to 15 or 18 cm away from the coil in the single mode omega.

This unit is it only has a PCB because the 6 PCB alonso unit can't detects more distance for the coin.

If we have perfect regulation all together max detection one euro coin is 10-12cm distance

[ANDREAS]

Andreas, Another thing, the omega coil that I did, have the followings sizes :


TX: 8.5 cm diameter with his small center of the omega have 4 cm diameter
magnet wire of 0.30 mm (0.29 mm here in mexico) with series 9+6+5+9 turns.

RX: 4 cm diameter, with magnet wire 0.20mm with 26+26 turns.


The turns that I put to the TX and RX antennas, was because morgan gave the values measured in ohms and only with those amounts of turns and the measures of wire magnet i could get that values, I could never get those ohmic values with the type of magnet wire and amounts of turns that morgan said.

The turns coils on feritte depends on the magnetic permeability of feritte.
Need for experiments or more luck
About omega coil , this is a helthkit, my opinion need replace with a better stability schematic. I don't like it

[ANDREAS]

Back in the 1980's I build a bipolar pulse induction metal detector that worked fine with an air core searchcoil. I replaced it with a ferrite rod "probe" type searchcoil and was surprised to discover that it had become very sensitive to earth field-- I'd inadvertently constructed a fluxgate magnetometer.

--Dave J.

Hi Dave J.
Maybe you are correct, but is not exactly this. As i say few posts ago, i have a personall theory, but i have not answers for all my questions
Regards

[LRLMAN]

PD

Hi all
Next step is omega-coils
attachment PDF
Note1: Original schematic publish Qiaozhi has for Tx coils 12+5+3+12. If you seePDF my omega has 12+3+5+12turns. This is correct.
We need high peaks RF transmitter with low-level modulation signal for better calibration
If we work with 12+5+3+12 turns TX coil you have 100% modulation signal 400-800HZ
with 12+3+5+12 modulation signal has level 45%
Note2:The dimensions are critical , if you want a properly nulling
regards

Andreas, i have some doubts and confusions, I have a question about this drawing that you present here are the measurements of the small coil that goes inside the omega TX; in this picture I see a TX and if I'm seeing good, it appears that within the circle is the RX coil to 35 mm?

So where is the small circle of omega TX coil and what measures should have this regarding the large coil TX?

also should measure 35 mm in diameter?

because if so then from where the 27.56 mm distance?

[Dave J.]

The circuit block diagram of a bipolar PI is just about the same as that of the typical fluxgate.