Parameters for a Concentric VLF search coil

[xthack]

Hi, it's me again !

Please, visit this thread before to understand what is the purpose of my project....
http://www.geotech1.com/forums/showthread.php?t=19263

The problem is, I suck as a newbie and this will be my very irst attempt to build a coil...
That's why I need your help to design it.

http://www.deeptech-bg.com/round_coils/coplanar.pdf
I saw this model before. At first sight, it's quite easy (that's why I want to reproduce it), but...
There are no indication regarding the number of turns and the diameter of each coil !?

And for the bucking coil, may I just use the same wire as the TX and wind it in the opposite way ? Or should they be two separate coils ?

[Qiaozhi]

There are no indication regarding the number of turns and the diameter of each coil !?

It depends on the transmit frequency you want to use. You can use the coil calculator at the top of the Coils Forum to work the inductance you will get for a given number of turns.

[ApBerg]

Hi, it's me again !

Please, visit this thread before to understand what is the purpose of my project....
http://www.geotech1.com/forums/showthread.php?t=19263

The problem is, I suck as a newbie and this will be my very irst attempt to build a coil...
That's why I need your help to design it.

http://www.deeptech-bg.com/round_coils/coplanar.pdf
I saw this model before. At first sight, it's quite easy (that's why I want to reproduce it), but...
There are no indication regarding the number of turns and the diameter of each coil !?

And for the bucking coil, may I just use the same wire as the TX and wind it in the opposite way ? Or should they be two separate coils ?

Look at http://www.geotech1.com/forums/showthread.php?t=12692 post # 22