How to build a loop for LRL

[Geo]

Hi. Here is the way that i made a loop for my electrostatic detector.

1. We pass the lid from a box of plastic colour 10 krg (it has 30cm diameter).
2. We cut it in the middle, as it appears in the photograph, in order to it is lighter.
3. We wrap the core with 2m wire 0,15mm diameter.

[Geo]

4. We wrap 1 turn from wire 2,5 mm diameter
5. We pass the core through the wire
6. Fix the coil (turn) in the plastic nutshell with hot glue (Max, calm )
7. We connect the FIS and we stick it above in the nutshell
Now its ready



Regards

[peroon]

Simillar to White's TM808 coils!?

[Max]

Originally Posted by Geo

4. We wrap 1 turn from wire 2,5 mm diameter
5. We pass the core through the wire
6. Fix the coil (turn) in the plastic nutshell with hot glue (Max, calm )
7. We connect the FIS and we stick it above in the nutshell
Now its ready



Regards

Hi,
seems very easy to do... nice work.

Did you have any result with that design ?

I guess this is the kind of coil employed with tape recorder preamp/amplifier stuff... as Esteban described... or do you use something different ?

Kind regards,
Max

[zenit52]

Hi dear Geo,

very nice work for building loop !!!

Please explain more this loop that how it working and share your LRL schematic here and tell us about it's performance ...
I am waiting for your answer...

with best regards... zenit52

[Geo]

Originally Posted by peroon

Simillar to White's TM808 coils!?

As loop yes. But i don't know about TM808 tunrs.

[Geo]

Originally Posted by Max

Hi,
seems very easy to do... nice work.

Did you have any result with that design ?

I guess this is the kind of coil employed with tape recorder preamp/amplifier stuff... as Esteban described... or do you use something different ?

Kind regards,
Max

Hi Max.
I saw it at a post from Esteban with a Aluminium loop. I had not al bar so i made it with the lid of a plastic box and a thin copper wire. It is not for the tape recorder preamplifier because i dont believe at it. Tape preamplifies are NAB preamplifiers so i dont like to play with them. I like every preampl to have straight line frequency responce.
I will use the loop with my electrostatic detector that i told at other thread. It is the PCB5 modificated.

Regards

[Geo]

Originally Posted by zenit52

Hi dear Geo,

very nice work for building loop !!!

Please explain more this loop that how it working and share your LRL schematic here and tell us about it's performance ...
I am waiting for your answer...

with best regards... zenit52

Hi zenit52.
Advantage of this loop is that it is not so sensitive at erratic signals. I have a electrostatic detector that give me some beeps at some places but i can't understand the exactly point to dig....
If this loop has more gain then maybe the "random" beeps to be continuesly so to have the ability to pin point the coins

Regards

[Esteban]

Yes, is style TM808, closed. As Geo said, is similar to aluminium, except is more ease to make. Yes, with this style no pick many interferences.

Geo, good work!

[Max]

Originally Posted by Esteban

Yes, is style TM808, closed. As Geo said, is similar to aluminium, except is more ease to make. Yes, with this style no pick many interferences.

Geo, good work!

and no tape recorder preamp... so... it's different from your suggested design!

As you can see people don't trust much your tape-recorder-based-LRL...

Have you ever made an LRL that works ???

Just hitting the keyboard , uh ? Like Dr. Hung!

Kind regards,
Max

[Esteban]

Originally Posted by Max

and no tape recorder preamp... so... it's different from your suggested design!

As you can see people don't trust much your tape-recorder-based-LRL...

Have you ever made an LRL that works ???

Just hitting the keyboard , uh ? Like Dr. Hung!

Kind regards,
Max

Why not? If you know the know-how... sure you know!

Of course, I made many... and you?

[Esteban]

Originally Posted by Geo

4. We wrap 1 turn from wire 2,5 mm diameter
5. We pass the core through the wire
6. Fix the coil (turn) in the plastic nutshell with hot glue (Max, calm )
7. We connect the FIS and we stick it above in the nutshell
Now its ready



Regards

For my part, don't worry. Here in hotest lands these glues aren't applicable... Maybe somebody can use in excess without problem!

Regards

[Esteban]

Rigid cable and 1 turn copper foil.

[Esteban]

Originally Posted by Geo

Hi zenit52.
Advantage of this loop is that it is not so sensitive at erratic signals. I have a electrostatic detector that give me some beeps at some places but i can't understand the exactly point to dig....
If this loop has more gain then maybe the "random" beeps to be continuesly so to have the ability to pin point the coins

Regards

In a place, and only in it place, just beeps 5 times at 4 or 5 meters. I found a 1798 Spanish silver coin. Was with circular loop pistol.

[Esteban]

Here a copper foil and some foils made. One is inside the core.

[Geo]

Originally Posted by Esteban

For my part, don't worry. Here in hotest lands these glues aren't applicable... Maybe somebody can use in excess without problem!

Regards

Hi Esteban.

I did not think it. So is this the reason that you always use resin glue???
I use very often hot silicon. Very easy to apply and be cold in few seconds


Regards

[Geo]

Originally Posted by Esteban

In a place, and only in it place, just beeps 5 times at 4 or 5 meters. I found a 1798 Spanish silver coin. Was with circular loop pistol.

Yesterday was a raining day. I went at afternoom to test it. I took 3 very short "beep" and nothing else. But it is not so sensitive to the field of the hight voltage lines (20KV). This is good. Today i will check it again at a place with copper coins...

Regards

[zenit52]

Hi Geo,

please put here your LRL schematic...
Did you test it in real condition for example to find some coins under soil ?
I am waiting for your answer...


with best regards... zenit52

[zenit52]

Hi Geo,

Did you use in your electrostatic detector, one magnetic field detector circuit, yes?
You maybe use LM324 to preamp receive signals and use LM3914 to show signal value by LEDs, yes?
please tell us about your device performance...
I am waiting for your answer...

with best regards...
zenit52

[Geo]

Originally Posted by zenit52

Hi Geo,

Did you use in your electrostatic detector, one magnetic field detector circuit, yes?
You maybe use LM324 to preamp receive signals and use LM3914 to show signal value by LEDs, yes?
please tell us about your device performance...
I am waiting for your answer...

with best regards...
zenit52

Hi.
Sorry but i can't give the schematics.
Electrostatic detector is a simple RF ampl and after 4 stages i demodulate the signal. I amplifier it yet and i send it to a beep generator (one 555 and a buzer)
At the MFD i use the LM3915 as indicator and a buzer for beeps.
About performance.... i am yet under test. I take some beeps but i can't pinpoint the object.

Regards

[aft_72005]

Hi zenit52
See this thread “Electrostatic field detector with ferrite rod”
At “ http://www.geotech1.com/forums/showt...php?t=15170”
Best regards.

[aft_72005]

Esteban circuit .Thanking you again ‘’ ESTEBAN”

[aft_72005]

Znit52
Electrostatic filed cannot radiated seem as electromagnetic field.
Also very interesting for me this matter which how detectable it ?
Our dear friend Esteban help me in the mater .
It is easy, moving coil at static filed produced voltage across it
Then amplifying and filter, at this point you can use meter seem as
Filed strange. Then compare it with reference voltage. (Adding sensitivity
Control section)
After this steps, you can use add audio generator.
I design electrostatic filed detector. It is on bread bored, work
Without problem at lab. As I beginning other work leave it now.
Best regards.

[vistac2000]

Hi aft_72005,

Thanks dear,
Did you work on what kind of MD?

Be success ...
with best regards...

[aft_72005]

I design electrostatic filed detector. It is on bread bored, work
Without problem at lab. As I beginning other work leave it now.

Hi vistac 2000
Didn’t test it on real historical places.
I doing other important work now .
Best regards.