Deep Seeking M.L

[george]

Hi.Does anyone made the deep seeking metal locator?.I made xmit and receiver except the coils because i can't find pot cores.Does anyone know in witch elec.devices can i find pot cores.
The shematic is about the same with gemini II but why the deep is more bigger?
Thanks

[arquimedes]

1811 3H1

Hi.Does anyone made the deep seeking metal locator?.I made xmit and receiver except the coils because i can't find pot cores.Does anyone know in witch elec.devices can i find pot cores.
The shematic is about the same with gemini II but why the deep is more bigger?
Thanks

Hi George
Do you got the 3H1 1811 cores? I am trying with other 1811 (561 N28 250), they have minor permeability and the transistor quikly burn it.


Arquimedes

[Qiaozhi]

Hi George
Do you got the 3H1 1811 cores? I am trying with other 1811 (561 N28 250), they have minor permeability and the transistor quikly burn it.


Arquimedes

Did you notice that you are replying to a post from 2003 ?????
This post was also made by a "guest", and nowadays (due to spammers) we only allow "members" to post. I doubt you will ever receive a response to your question ... unless the "guest" is now a "member".

[Geo]

Did you notice that you are replying to a post from 2003 ?????
This post was also made by a "guest", and nowadays (due to spammers) we only allow "members" to post. I doubt you will ever receive a response to your question ... unless the "guest" is now a "member".

Ohhhh my God... how many years before...... what did you remember me.
George was me and later i changed nickname to Geo.
Btw... i constructed the detector and at the position of pot-core i put coils on simple ferrite core. Detector worked but was a little astable.

Regards .... and you made my day

[Qiaozhi]

Ohhhh my God... how many years before...... what did you remember me.
George was me and later i changed nickname to Geo.
Btw... i constructed the detector and at the position of pot-core i put coils on simple ferrite core. Detector worked but was a little astable.

Regards .... and you made my day

That's why I wrote, "... unless the "guest" is now a "member".
I thought it might be you, but couldn't be certain as the IP address was different.

[Geo]

That's why I wrote, "... unless the "guest" is now a "member".
I thought it might be you, but couldn't be certain as the IP address was different.

A dynamic IP before 8 years...... what you waited to see

Regards

[arquimedes]

DEEP SEEKER

Hi Geo
I am new in the forums and I am happy for yuor "news". What core do you used (E, toroide, permeability) ? Do you tested what depth reach?
The article say 20Khz in trasmitter(pag 1) and then 100Kz. I am trying whith a 1811 pot core of 250 permeabiliy and generate 180 Khz.
Excuse my english.

Arquimedes:

[Qiaozhi]

A dynamic IP before 8 years...... what you waited to see

Regards

Actually, that's not so funny as you might think.
Always tempted by a challenge ... I searched the database using the IP address of the "guest" (213.5.83.105). There were no matches; so I searched again using a partial IP address ... and voila! ... see below:

By the way, you have used more than 800 separate IP addresses over the years while using Geotech. They're all there in the records. So my initial assumption was wrong. I could have tracked you down after all.

[mikebg]

No need of pot-cores when you use normal coils. The recent designs of Fisherlab use normal coils connected without transformers:
http://www.fisherlab.com/
CEIA MIL-D1/s1 also uses multiturn coils:
http://www.ceia.net/groundsearch/pdf...brochureGB.pdf

[Geo]

Hi Geo
I am new in the forums and I am happy for yuor "news". What core do you used (E, toroide, permeability) ? Do you tested what depth reach?
The article say 20Khz in trasmitter(pag 1) and then 100Kz. I am trying whith a 1811 pot core of 250 permeabiliy and generate 180 Khz.
Excuse my english.

Arquimedes:

Hi.
I used simple cores without shield (a plastic base with a ferrite screw at the center). Because it was astable, i did not make tests at field. Inside the lab it detected a soda can at 50...60cm on air. I believe that it is better to construct the Garry's 2box.
Deep seeker is based on Gemini-II schematic so it is better to buy a used Gemini-III that it is better. But the construction of a detector is an other "good" story

Regards

[Geo]

Actually, that's not so funny as you might think.
Always tempted by a challenge ... I searched the database using the IP address of the "guest" (213.5.83.105). There were no matches; so I searched again using a partial IP address ... and voila! ... see below:

By the way, you have used more than 800 separate IP addresses over the years while using Geotech. They're all there in the records. So my initial assumption was wrong. I could have tracked you down after all.

Hi Qiaozhi.
I know all these as before some years i was administrator at a Greek forum using VBulletin

Regards

[Geo]

No need of pot-cores when you use normal coils. The recent designs of Fisherlab use normal coils connected without transformers:
http://www.fisherlab.com/
CEIA MIL-D1/s1 also uses multiturn coils:
http://www.ceia.net/groundsearch/pdf...brochureGB.pdf

Hi Mike.
The designer of the deep seeker used pot-cores for better shielding (if i remember right)from the Tx field.

[arquimedes]

DEEP SEEKING

Hi
In the article of Wait and Harrison It is wrong the inductance of 16 mH in Rx L2? This inductor is not very diferent( only 20 turns, 5%) of Tx L1 whit 160mH. Inductance is proporcional to turns with the same core.

[mikebg]

Hi
In the article of Wait and Harrison It is wrong the inductance of 16 mH in Rx L2? This inductor is not very diferent( only 20 turns, 5%) of Tx L1 whit 160mH. Inductance is proporcional to turns with the same core.

Indictance is proportional to SQUARE of turns number! Note what dimension has the parameter AL -nanohenries pro square turns number.

[arquimedes]

DEEP SEEKING

Hi Mike
I hope my first ML and I will greateful for your valoration: obtain MIL D1/DS and FISHER better depth than DEEP SEEKING? Do you have de schems of thats ML?
Excuse my bad english