PD Discussions

[Morgan]

Originally Posted by aft_72005

Hi mehdi
At the first, Also I didn’t believe LRL detection until when found some rusty
Nails with my long range locator !!!!!!!!! ., I believe there are phenomenon and energy filed around long buried metals now .

Hi

I remember Esteban told he found iron fragments from old fence when test his PD. He told to avoid this sensitivity to rusty iron need to increase the resonating frequency. This will make the PD less sensitive to iron,i supose you found the iron with your PD prototype.

Regards

[aft_72005]

Originally Posted by Morgan

Hi

I remember Esteban told he found iron fragments from old fence when test his PD. He told to avoid this sensitivity to rusty iron need to increase the resonating frequency. This will make the PD less sensitive to iron,i supose you found the iron with your PD prototype.

Regards

Hi Morgan
Thanks for your attention . Yes, I remember what's Esteban said .
But my real LRL wasn't Alonso PD clone . It is other PD………
About my Alonso clone PD , it is working ,detect 17 inch computer CRT screen from 1.5
Meter !!!!!. It is working very stable on the workbench , but problem when test on the ground , it is instability , must be re tune it
And this is problem . also I think there are this instability in original Alonso PD
what is your opinion??????
Best regards.

[Geo]

Before 2 months i made some modifications to my PD.
Results...... Very very stable and no Sky-ground effect.
All the story is the right null of the Rx coil.

Regards

[aft_72005]

Originally Posted by Geo

Before 2 months i made some modifications to my PD.
Results...... Very very stable and no Sky-ground effect.
All the story is the right null of the Rx coil.

Regards

Hi Geo
Please more explain……. For how long time duration stable on over ground????
My opinion is period of retune while search area.
With your set null please say, what is detection range for 1.5 volt battery
Short circuit ?, what is detection range from TV ?
Best regards.

[Geo]

Originally Posted by aft_72005

Hi Geo
Please more explain……. For how long time duration stable on over ground????
My opinion is period of retune while search area.
With your set null please say, what is detection range for 1.5 volt battery
Short circuit ?, what is detection range from TV ?
Best regards.

Hi aft.
About stability over the ground......more than 15minutes without retuning.
The short circuit test is not good for me. When PD works as double detector (omega + passive receiver) it detects the battery spark only from 20...30 cm. When it is at ferrite mode then it detects the battery spark from 90...95 cm and the TV-on from 5meters. But this is not a test that means anything......

Regards

[aft_72005]

Originally Posted by Geo

Hi aft.
About stability over the ground......more than 15minutes without retuning.
The short circuit test is not good for me. When PD works as double detector (omega + passive receiver) it detects the battery spark only from 20...30 cm. When it is at ferrite mode then it detects the battery spark from 90...95 cm and the TV-on from 5meters. But this is not a test that means anything......

Regards

Thank you Geo
Other question ,
When MD with ferrite work , what is detection range for 1 euro coin?
Best regards.

[Geo]

Originally Posted by aft_72005

Thank you Geo
Other question ,
When MD with ferrite work , what is detection range for 1 euro coin?
Best regards.

As lrl i did not found a euro coin. Now as MD... about 18cm (averange) depended of how critical is adjusted. I can say that it can detect the euro coin betwen 16 and 20 cm.

Regards

[aft_72005]

Originally Posted by Geo

As lrl i did not found a euro coin. Now as MD... about 18cm (averange) depended of how critical is adjusted. I can say that it can detect the euro coin betwen 16 and 20 cm.

Regards

Thank you Geo , yes, if we set TX/RX coils as un tune mode ,
We reach to extra stability , but big problem here ,lose high sensitivity.
Therefore it didn't act as LRL !!!!!!!
Best regards.

[WM6]

Originally Posted by Geo

Before 2 months i made some modifications to my PD.
Results...... Very very stable and no Sky-ground effect.
All the story is the right null of the Rx coil.

Regards

Hi Geo

Probably you put device on OFF position?

[Geo]

Originally Posted by WM6

Hi Geo

Probably you put device on OFF position?

..... very clever

[mehdi]

Originally Posted by aft_72005

Hi mehdi
At the first, Also I didn’t believe LRL detection until when found some rusty
Nails with my long range locator !!!!!!!!! ., I believe there are phenomenon and energy filed around long buried metals now .

Hi my dear friend thanks
i sent to you a PM, please see that and reply to me.

all the best
mehdi

[aft_72005]

Originally Posted by Qiaozhi

Hi Aft,

Do you want to start a new thread and copy certain posts to that thread? If so, which ones do you want to copy?

Yes, better move because this is zahori dissection
But don’t important move to which one !!! what is your opinion ?
Thanks for my trouble .
Best regards .

Best regards .

[aft_72005]

Originally Posted by Geo

Try and tell us

I must be go to electronic market and buy them. Test this,
But I think don’t solve problem !!!! because instability began when
Coil over ground

[Geo]

Originally Posted by aft_72005

I must be go to electronic market and buy them. Test this,
But I think don’t solve problem !!!! because instability began when
Coil over ground

I use a 7805

[aft_72005]

Originally Posted by Geo

I use a 7805

thank you if you having free time also try TL431 , drift is 20ppm , belter than 7805

[Geo]

Originally Posted by aft_72005

thank you if you having free time also try TL431 , drift is 20ppm , belter than 7805

No reason. Now is very stamble

[aft_72005]

Originally Posted by FrancoItaly

Hi All
The better system to eliminate slow drift in DC signals it's to use a motion circuit, I use a comparator, the signal goes to one input by a capacitor and the same input is polarized at half DC power and the other input goes to a potenziometer for sensibility regulation: If you use a CA3130 or CA3140 the capacitor may be about 1 microfarad.

Best regards

Hi FrancoItaly
Yes, this add on circuit the way for stability at high sensitivity
Best regards.

[Qiaozhi]

I have moved all the PD discussions to this new thread, as the original thread was about the Zahori device.

[aft_72005]

Originally Posted by Qiaozhi

I have moved all the PD discussions to this new thread, as the original thread was about the Zahori device.

Hi Qiaozhi
Thanks for trouble .
Best regards.