Real clone Alonso-PD

[ANDREAS]

Originally Posted by 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.

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

[ANDREAS]

Originally Posted by LRLMAN

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]

Originally Posted by Dave J.

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]

Originally Posted by ANDREAS

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.

[LRLMAN]

Originally Posted by ANDREAS

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

Ok Andreas then you are saying here that the type of omega inside morgan present of the head PD Alonso should be replaced by another type of TX and RX coils? may be for 2 doble OO?

Like as showed Esteban in an ancient thread or such as you did in your prototype that worked better?

like next images:

Or change the schematic and components???

[LRLMAN]

Andreas,

I also have doubts about the position of the ferrites with respect to the direction where this points in cloned prototypes, if you look.... all ferrites are always pointing to the wires that going in the direction to the TX and RX omega coil,

electronically has something to do this for a good detection of this device?

see next image:

[ANDREAS]

Originally Posted by LRLMAN

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?

Attachment pdf file.
Red lines is turns wires. Up for omega coil and down for receiver coil
Black lines is forms-driver for coils
regrads

[Nicolas]

If I good understand Andreas mean this

the RX is in center of TX? If not correct me

[LRLMAN]

Hi Andreas Sorry for so many questions about, but the questions are many to finish this PD properly and to see if it work or not,.. if not then stop this project.

although the idea is to start make a different omega which that I have
to advance in this PD.

I have some more questions about the omega image:

[LRLMAN]

I think all these questions are very important for making a perfect omega with some accuracy in order to give the PD a high performance.

[ANDREAS]

Today (nw i am out my base), i export a PDFfile scale 1:1 via CAD. You need only print this and you have real dimensions for omega coil and Rx coil
regards

[LRLMAN]

Originally Posted by ANDREAS

Today (nw i am out my base), i export a PDFfile scale 1:1 via CAD. You need only print this and you have real dimensions for omega coil and Rx coil
regards

Hey Andreas that sounds much better,

Yesterday I connected to PD an Omega coil equal that which morgan exposed in RS for his device but not detected little more distance than the omega I did, only 12 or 15 cms distance for coin similar diameter to 1 Euro

OMEGA MORGAN: TX: 5-2-2-5 and RX: 14+14 or 30+30 all magnet wire was to 0.15mm

handling this wire is very difficult, this is very thin

[ANDREAS]

Originally Posted by LRLMAN

Hey Andreas that sounds much better,

Yesterday I connected to PD an Omega coil equal that which morgan exposed in RS for his device but not detected little more distance than the omega I did, only 12 or 15 cms distance for coin similar diameter to 1 Euro

OMEGA MORGAN: TX: 5-2-2-5 and RX: 14+14 or 30+30 all magnet wire was to 0.15mm

handling this wire is very difficult, this is very thin

Attachment PDF files. Print this and you have real dimensions about coils
About magnet wire don't need is a myth. Simple coil-wire is enough.
On information in the RS forum you believe there is truth;
I don't think. I'm sure Morgan and his friends, he gave affairs and opinions, just because .... don't know or they don't build this PD by members (Especially for my person, fear units production). I think they knows only the operating frequency of the original PD and I say this, because, using the same frequency in PDK
Regards

[ayoni03]

Hi Andreas Sorry for so many questions about AlonsoPD.
Can you explain please how to connected omega tx coil for transmiter. Transmitter board on the 3 pole for Omega coil ,this is 5 pole 12+3+5+12
Best regards..

[Nicolas]

Originally Posted by ayoni03

Hi Andreas Sorry for so many questions about AlonsoPD.
Can you explain please how to connected omega tx coil for transmiter. Transmitter board on the 3 pole for Omega coil ,this is 5 pole 12+3+5+12
Best regards..

I think same this

[ayoni03]

Hi Nicolas ,
Thank you very much for reply...İt is same vlf detector..maybe..
All the best....

[reza vir]

Thanks ANDREAS and Friends

[folharin]

frequency l1[uh] L1 L2

40KHZ-100KHZ 60MH 4500TURNS 45turns
150khz-450khz 4mh 550turns 20turns
1mhz=3mhz 100uh 65turns 7turns

[Goldmaxx]

Hi Andreas
I wanted start to produce the PCBs and have a question for the transmitter PCB.

In the schematic, is a resistor R7 drawn, but on the PCB is it not available.
Is that right?

Best Regards

[ANDREAS]

Originally Posted by Goldmaxx

Hi Andreas
I wanted start to produce the PCBs and have a question for the transmitter PCB.

In the schematic, is a resistor R7 drawn, but on the PCB is it not available.
Is that right?

Best Regards

Yes is correct. I put out R7, because, sometimes need value R7=10K or R7=6K8. With this tip i can make replace very easy this resistor, before i am sure the standard value R7=8K2
Please wait small time. I need free time and fine weather for video's for publish here more infos
regards

[folharin]

omega coil

detect coin 20cm

[Qiaozhi]

Originally Posted by folharin

omega coil

detect coin 20cm

That's not an omega coil. It's an OO coil with the loops having different diameters.

[folharin]

circuit signal generator 68 khz pistol detect 3,4 meters

[Goldmaxx]

Originally Posted by ANDREAS

Yes is correct. I put out R7, because, sometimes need value R7=10K or R7=6K8. With this tip i can make replace very easy this resistor, before i am sure the standard value R7=8K2
Please wait small time. I need free time and fine weather for video's for publish here more infos
regards

Okay, very good Andreas. Many thanks for your quick reply and tip, I'll be waiting for your new infos.
Wish you all the best