[x] Welcome at THunting.com!

A fun place to talk about Metal Detecting, Treasure Hunting & Prospecting. Here you can share finds and experience with thousands of members from all over the world

Join us and Register Now - Its FREE & EASY

THunting.com
Treasure Hunting & Metal Detecting Community
   
Advanced Search
*
Welcome, Guest! Please login or register HERE - It is FREE and easy.
Only registered users can post and view images on our message boards.
Did you miss your activation email?

Login with email, password and session length
Or Login Using Social Network Account
2
News:
Pages:  1 ... 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43   Go Down
Print
Share this topic on FacebookShare this topic on Del.icio.usShare this topic on DiggShare this topic on RedditShare this topic on Twitter
Tags:
0 Members and 1 Guest are viewing this topic.
Offline xavier
Platin Member
*

From a rainy Brussels
Join Date: May, 2009
Thank you149

Activity
0%
Male
Belgium
Posts: 7339
Referrals: 0

32206.00 Gold
View Inventory
Windows 7/Server 2008 R2
Windows 7/Server 2008 R2
Chrome 42.0.2311.135
Chrome 42.0.2311.135

Awards
« Reply #330 on: May 14, 2015, 08:18:34 am »
Go Up Go Down

How deep dose it go??? what size object are you looking for? Depth always depends on the size, type of metal, ground condition, and the user himself. Hope this will help you some.

Linkback:

You are not allowed to view links.
Please Register or Login

http://www.thunting.com/smf/index.php/topic,7657.msg296785.html#msg296785


Xavier


Logged

So many questions so little time

Offline cvele61
Pull Tab
*

Join Date: Mar, 2013
Thank you7

Activity
0%

Serbia and Montenegro
Posts: 12
Referrals: 0

85.00 Gold
View Inventory
Windows XP
Windows XP
Chrome 43.0.2357.132
Chrome 43.0.2357.132

Awards

sandbanks pi
« Reply #331 on: July 11, 2015, 11:47:42 am »
Go Up Go Down

Here is My version of chance-PI, and notice about coil:
only way I find for good relation of depth and discrim
was to make cc coil with ordinary pi coil for TX and TX1
in combination with spider for RX. And it vork  fine!
TX 0,8mm * 21wind on 38,5cm
TX1 0,8mm * about 7wind (not sure because number of
bucking coil depend of RX coil)
RX 0,75mm * 18+24 wind spider

Posted on: July 11, 2015, 11:42:12 am
Picture of chance-pi

Linkback:

You are not allowed to view links.
Please Register or Login

http://www.thunting.com/smf/index.php/topic,7657.msg299182.html#msg299182



There are 1 attachment(s) in this post which you can not view or download

Please register for viewing them.

chance-pi 003.jpg


Logged
Offline Mudflap
Knight
Gold Member
*

Join Date: Apr, 2010
Thank you91

Activity
0%

United States
Posts: 1864
Referrals: 0

9295.00 Gold
View Inventory
Mac OS X 10.10
Mac OS X 10.10
Firefox 39.0
Firefox 39.0

Awards
« Reply #332 on: July 11, 2015, 07:07:30 pm »
Go Up Go Down

That's a nice looking front panel layout.

Linkback:

You are not allowed to view links.
Please Register or Login

http://www.thunting.com/smf/index.php/topic,7657.msg299195.html#msg299195




Logged
Offline xavier
Platin Member
*

From a rainy Brussels
Join Date: May, 2009
Thank you149

Activity
0%
Male
Belgium
Posts: 7339
Referrals: 0

32206.00 Gold
View Inventory
Linux
Linux
Safari 4.0
Safari 4.0

Awards
« Reply #333 on: July 16, 2015, 12:48:07 pm »
Go Up Go Down

Quote:Posted by cvele61
Here is My version of chance-PI, and notice about coil:
only way I find for good relation of depth and discrim
was to make cc coil with ordinary pi coil for TX and TX1
in combination with spider for RX. And it vork  fine!
TX 0,8mm * 21wind on 38,5cm
TX1 0,8mm * about 7wind (not sure because number of
bucking coil depend of RX coil)
RX 0,75mm * 18+24 wind spider

Posted on: July 11, 2015, 11:42:12 am
Picture of chance-pi

Sorry mate but I don't understand your coil configuration,  and what is a CC coil? Are you sure that you do not mean a DD coil?

Linkback:

You are not allowed to view links.
Please Register or Login

http://www.thunting.com/smf/index.php/topic,7657.msg299294.html#msg299294


Xavier


Logged

So many questions so little time

Offline bernte_one
Bronze Member
*

shared wisdom is doubled wisdom
Join Date: May, 2011
Thank you67

Activity
0%

Germany
Posts: 176
Referrals: 0

945.00 Gold
View Inventory
Windows 7/Server 2008 R2
Windows 7/Server 2008 R2
Chrome 43.0.2357.134
Chrome 43.0.2357.134

Awards

GUESS WHICH
« Reply #334 on: July 16, 2015, 01:59:44 pm »
Go Up Go Down

xavier i think he made not a mono coil configuration

he made a concentric coil wit tx and rx
he splits the coil stage in one transmit with a second bucking coil connected counterclockwise to first tx coil

and the rx coil is spider web coil with 18 turn on  24cm former or so ?  right?


would be much easier to build a DD coil  nulling is much easier
i would recommend  300H for tx  and 1mH or a bit more for rx  all with parallel damping resistors

Linkback:

You are not allowed to view links.
Please Register or Login

http://www.thunting.com/smf/index.php/topic,7657.msg299296.html#msg299296


my machines at work http://mueller-meteoriten.de


Logged

I CAN MAKE PCBs FOR YOUR DIY PROJECT  offer only within EU

Offline cvele61
Pull Tab
*

Join Date: Mar, 2013
Thank you7

Activity
0%

Serbia and Montenegro
Posts: 12
Referrals: 0

85.00 Gold
View Inventory
Windows XP
Windows XP
Chrome 43.0.2357.134
Chrome 43.0.2357.134

Awards

sandbanks pi
« Reply #335 on: July 18, 2015, 10:14:28 am »
Go Up Go Down

Yes Bernte_one, That is exactly what I did because of better discrim but now, after been outdoor
i am not sure  about it. Its too  heavy and the disc is the same as with classic CC (concentric coil)
like You describe .
Regard
Dragan

Linkback:

You are not allowed to view links.
Please Register or Login

http://www.thunting.com/smf/index.php/topic,7657.msg299344.html#msg299344




Logged
Offline 6666
Bronze Member
*

Join Date: Mar, 2010
Thank you23

Activity
0%
Male
Australia
Posts: 200
Referrals: 0

1060.00 Gold
View Inventory
Windows 7/Server 2008 R2
Windows 7/Server 2008 R2
Firefox 39.0
Firefox 39.0

Awards

DIY, Whites 6000d, whites 2000 PI
« Reply #336 on: July 18, 2015, 07:43:24 pm »
Go Up Go Down

Quote:Posted by {author}
i would recommend  300H for tx  and 1mH or a bit more for rx


Hi bernte_one

What is the outside diameter of your finished DD coil and what value damping resister do you use on the 1mH RX coil ? thanks





Linkback:

You are not allowed to view links.
Please Register or Login

http://www.thunting.com/smf/index.php/topic,7657.msg299357.html#msg299357




Logged
Offline kotsansherTopic starter
Copper Member
*

Join Date: Sep, 2009
Thank you33

Activity
0%

Russian Federation
Posts: 53
Referrals: 0

411.00 Gold
View Inventory
Windows XP
Windows XP
Firefox 3.6.3
Firefox 3.6.3

Awards

EXPLORER
« Reply #337 on: October 19, 2015, 07:11:17 pm »
Go Up Go Down

Hello Folks !!   Smiley

OK here is a link to my old archive at forum.cxem.net forum. My good friend Korvin has uploaded a lot of working projects and various schematics.  Smiley

You can find and free download ММП 203 - Professional Magnetometer Project and a lot informations about PI and VLF metal detectors. Also there are some hand held oscillograph poject and various meters like F/RLC for your MD lab and lot informations about Treasure hunting and Metal prospecting. Feel free to copy and redistribute world wide.

My new MOTO: Every house with metal detector. It is a best way to make a life wonderfull - clean air and shiny sun with a lot of golden coins in the pockets.

Let's the TH games begin !!  Cheesy

{alt}

You are not allowed to view links.
Please Register or Login

http://forum.cxem.net/index.php?showtopic=72677


{alt}

You are not allowed to view links.
Please Register or Login

http://krab.3bb.ru/viewtopic.php?id=89&p=2


Have a nice gold hunting day !!  Kiss
Kotsansher !!


Linkback:

You are not allowed to view links.
Please Register or Login

http://www.thunting.com/smf/index.php/topic,7657.msg302371.html#msg302371
http://forum.cxem.net/uploads/av-126325.jpg?_r=0
http://s39.radikal.ru/i086/0907/21/68f1c2102d54.jpg




Logged
Offline WM6
Knight
Copper Member
*

Join Date: Oct, 2010
Thank you4

Activity
0%

Slovenia
Posts: 72
Referrals: 0

365.00 Gold
View Inventory
Linux (Ubuntu)
Linux (Ubuntu)
Firefox 29.0
Firefox 29.0

Awards

Tesoro Euro Sabre II
« Reply #338 on: October 19, 2015, 07:58:28 pm »
Go Up Go Down

Thank you for all your unselfish kindness Kotsansher.

Best wishes to you!

Linkback:

You are not allowed to view links.
Please Register or Login

http://www.thunting.com/smf/index.php/topic,7657.msg302372.html#msg302372




Logged

Global capital is ruining your life?
You have right to self-defence!

Offline komalo
Pull Tab
*

Join Date: Nov, 2014
Thank you0

Activity
0%

Algeria
Posts: 9
Referrals: 0

55.00 Gold
View Inventory
Windows 7/Server 2008 R2
Windows 7/Server 2008 R2
Chrome 46.0.2490.80
Chrome 46.0.2490.80

Awards

dbp 2010
« Reply #339 on: October 30, 2015, 02:02:33 pm »
Go Up Go Down

Is this descrimination work with all detectors (PI) or only with this detector " chance" ?

Linkback:

You are not allowed to view links.
Please Register or Login

http://www.thunting.com/smf/index.php/topic,7657.msg302933.html#msg302933




Logged
Print
Pages:  1 ... 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43   Go Up
Jump to:  

Powered by SMF 1.1.19 | SMF © 2005, Simple Machines | Sitemap
Copyright THunting.com