Wanting to build my own large scale PI coil

[marticus]

Ho all. Im wanting to build my own large scale PI coil for my detector. Im looking at a 36inch diameter size coil.
I know what guage wire to use. But i cant work out how many winds i might need. Any help would be appreciated. Thank you

 

[Rob071]

Easy to build pulse induction metal detector with DSP
There are many more there is a site that is all it does i will see if i can find it.

Geotech Forums
This site gives you everything you need..

Admins if its wrong to put up links to these sites please delete

 

[marticus]

Thanks ive been to that site many times before and got most of my info from it. However the link to a page which calculates the number of wire turns wont work on my server. and i havnt been able to find a mathematical equation to help me calculate it either. I understand its not going to as sensitive as a normal coil. But my use is for deep large targets.

 

[marticus]

My connection cable has 6 wires. 2x rx. 2x tx and 2x faraday sheild
If i can find out hoe many turns of the rx and tx i need to do. I should have it working. by taking an old mono coil apart i found it used 40 turns of a 19awg wire and 60 turns of a 22awg wire for the rx and tx. Im not sure if i need to increase the amount of turns for a larger coil. Or if this amount will work on it

 

[chlsbrns]

Thanks for posting the links!

I want a coil to tow behind me when diving and spearfishing.

 

[Rob071]

there is a coil calculator on that site...just search for it..

 

[Shunkaha]

Thanks ive been to that site many times before and got most of my info from it. However the link to a page which calculates the number of wire turns wont work on my server. and i havnt been able to find a mathematical equation to help me calculate it either. I understand its not going to as sensitive as a normal coil. But my use is for deep large targets.

there is a coil calculator on that site...just search for it..

He has been there he just can't access the calculator.