Real clone Alonso-PD

[ANDREAS]

Hi all and Happy new year
Many members knows few years ago i build a clone Alonso-PD
This old "amateur clone" i use many-many mods for find the best balance between all stage.
But is not enough for me. Last months i start again experiments. My "target is... I try work with the same method use by Alonso for calibration omega-coils and feritte all together with standard schematic publish here from qiaozhi without any extras.
I find this method and i build a "real alonso-PD clone" with all parts.
My prototype now can detect a very-very small magnet-piece 2 meters distance very easy and a micro transmitter 433MHZ more than 50 meters distance.
My clone has not false signals from South-north magnetics lines and with calibration knob i can calibrate machine very easy in search-area
In my test-area work perfect, but i need make tests with unknown area and ofcourse video's with unknown targets
This knob for calibration and very small mods (low-bat section, power supply section) are the only extra's
The truth is that the calibration is too difficult and now i understand why there were failures to construct a truly clone
Here some pics my prototype
Heltkit section and feritte section work together without extra selection switch. Output signal from feritte coils is very-very low and feritte section now, work without overload signal.
Next days if i have free time i publish here more infos and i start video's with prototype
I want to thank a forum member here ( very good electronic engeneer ) , because, with his help and testing , I managed to find all the problems encountered
best regards

[folharin]

andreas excellent job. you are using ferrite and omega coil together? can see the regulator calibration for the ferrite, it changes the position of the ferrite coil?

[Geo]

Hi all and Happy new year
Many members knows few years ago i build a clone Alonso-PD
This old "amateur clone" i use many-many mods for find the best balance between all stage.
But is not enough for me. Last months i start again experiments. My "target is... I try work with the same method use by Alonso for calibration omega-coils and feritte all together with standard schematic publish here from qiaozhi without any extras.
I find this method and i build a "real alonso-PD clone" with all parts.
My prototype now can detect a very-very small magnet-piece 2 meters distance very easy and a micro transmitter 433MHZ more than 50 meters distance.
My clone has not false signals from South-north magnetics lines and with calibration knob i can calibrate machine very easy in search-area
In my test-area work perfect, but i need make tests with unknown area and ofcourse video's with unknown targets
This knob for calibration and very small mods (low-bat section, power supply section) are the only extra's
The truth is that the calibration is too difficult and now i understand why there were failures to construct a truly clone
Here some pics my prototype
Heltkit section and feritte section work together without extra selection switch. Output signal from feritte coils is very-very low and feritte section now, work without overload signal.
Next days if i have free time i publish here more infos and i start video's with prototype
I want to thank a forum member here ( very good electronic engeneer ) , because, with his help and testing , I managed to find all the problems encountered
best regards

still you fiddle with this??

[aft_72005]

Hi Andreas
And happy new year
Congratulation. Seeing nice work , I hope more success for you .
Best regards

[Nicolas]

Alonso Scheme for PD is the best here. Thank you to all who have actually worked on and do some modification and updating. such as Qiaozhi Eteban and Morgan and other.

Good luck my friend Andreas. and I hope for you a good result in all the world.
the transmitteur and receiver 433MHZ and the right choice my friend. well you advance in this field. 433 MHz is used in the detection by the magnetometer.

Look this picture details and link

www.parallaxinc.com





If you need help for higtech you know my email.

[Qiaozhi]

Hi all and Happy new year
Many members knows few years ago i build a clone Alonso-PD
This old "amateur clone" i use many-many mods for find the best balance between all stage.
But is not enough for me. Last months i start again experiments. My "target is... I try work with the same method use by Alonso for calibration omega-coils and feritte all together with standard schematic publish here from qiaozhi without any extras.
I find this method and i build a "real alonso-PD clone" with all parts.
My prototype now can detect a very-very small magnet-piece 2 meters distance very easy and a micro transmitter 433MHZ more than 50 meters distance.
My clone has not false signals from South-north magnetics lines and with calibration knob i can calibrate machine very easy in search-area
In my test-area work perfect, but i need make tests with unknown area and ofcourse video's with unknown targets
This knob for calibration and very small mods (low-bat section, power supply section) are the only extra's
The truth is that the calibration is too difficult and now i understand why there were failures to construct a truly clone
Here some pics my prototype
Heltkit section and feritte section work together without extra selection switch. Output signal from feritte coils is very-very low and feritte section now, work without overload signal.
Next days if i have free time i publish here more infos and i start video's with prototype
I want to thank a forum member here ( very good electronic engeneer ) , because, with his help and testing , I managed to find all the problems encountered
best regards

Your coil looks higher up than the original Alonso PD, and the ferrite appears to be placed in the null line (as described in Chapter 14 of ITMD). Is this correct?

[Geo]

With ferrite "out" of coil is more easy to null the signal of passive receiver. But original Alonso;s PD is different.

[ANDREAS]

Your coil looks higher up than the original Alonso PD, and the ferrite appears to be placed in the null line (as described in Chapter 14 of ITMD). Is this correct?

I use scale via photo ( for example attachment pic). In this case i have false dimensions +/-2-3 mm. After study some photo's inside PD-Alonso, before start build omega-coils etc, i am sure for results and real dimensions using my PD.
...and the ferrite appears to be placed in the null line (as described in Chapter 14 of ITMD)
I have not your book, but feritte is not placed in the null line.
Please remember my old message, we have ONLY a "magic place". In this place, output feritte-coils has only 0,1-3mv output signal. For this results, i use a micrometric moving system and ofcourse need fine null omega together (move -null omega and again). This point is very difficult. We need repeating tests, before protection this place
Regards

[Qiaozhi]

Please remember my old message, we have ONLY a "magic place". In this place, output feritte-coils has only 0,1-3mv output signal. For this results, i use a micrometric moving system and ofcourse need fine null omega together (move -null omega and again). This point is very difficult. We need repeating tests, before protection this place

Does your ferrite coil have two cores with a gap (as per the original Alonso PD) or is it just one complete core?

[ANDREAS]

Does your ferrite coil have two cores with a gap (as per the original Alonso PD) or is it just one complete core?

It's same about results, the gap is easier for calibration, but
the gap produce sometimes false signals. My opinion.
Never we have see a real photo, about feritte (gap or not). I think "the gap" is false infos for stoped some members build it or present a myth
I think "original feritte" work with complete core. I use complete core, because has stability out signal
Second i believe never members open the original coil in feritte. A x-ray photo yes, but destroy the place and open never
I have this sense, because.. if you have a unit and work , you don't touch somethink and stop work.
The interest for all is this "magic point" is +/- 0.1mm. Tell me Quiaozhi, can you find this point with your hands? Personally i cannot. In this case my clone with micrometric regulator i think is better original
Conclusion. Members that say they know or have opened or know exactly how is the original, i think say "guess - tales" and they publish bla-bla and dreams.
If they knows really , few years ago, they start build and sell units. This is only real true.
regards

[Qiaozhi]

The interest for all is this "magic point" is +/- 0.1mm. Tell me Quiaozhi, can you find this point with your hands? Personally i cannot.

I was also unable to find the "magic point" by hand. The TOTeM unit uses a single ferrite core that is placed in the upper null line of the TX coil. This is easy to find by hand, and can be nulled to only a few mV.

If the original Alonso PD has a split core, then I suspect the ferrite nearest the TX coil is acting similar to the nulling coil in a concentric arrangement. Since it is not driven by the TX oscillator, and relies only on voltage induced into the coil, this would explain why it is very difficult to find the balance point.

[ANDREAS]

I was also unable to find the "magic point" by hand. The TOTeM unit uses a single ferrite core that is placed in the upper null line of the TX coil. This is easy to find by hand, and can be nulled to only a few mV.

If the original Alonso PD has a split core, then I suspect the ferrite nearest the TX coil is acting similar to the nulling coil in a concentric arrangement. Since it is not driven by the TX oscillator, and relies only on voltage induced into the coil, this would explain why it is very difficult to find the balance point.

About totem is easy, the transmitter is very low power. I don't i build complet with transmitter, only i build receiver. Alonso PD has a strong transmitter and feritte core is very near. For all places we have 50-100mv output coils feritte, ofcourse overload feritte-receiver

[folharin]

see what esteban said:
I forgot! See in blue circle the sand. Pistol also is used as normal MD for to found the item in the sparzed sand or hole!

[folharin]

bobina omega é md normal ,não encontra objetos longe
only part ferrite is lrl

[Nicolas]

http://www.youtube.com/watch?v=aQlraoG1sCw

http://www.youtube.com/watch?v=uda9gjUEGgg