Well here we go

[chemelec]

J_Player, Probably Not the actual coil, but probably correct for the case i is housed in.

But what does this have to do with this particular thread on a PI Detector coil?

[J_Player]

Hi Chemelec,

The reason I posted that graphic is to illustrate how some confusion can come into play when details are missing about coils. This advertized coil size is different than the actual coil size. And if the actual coil has an id and od.

Perhaps it would have been better if I made a text comment instead posting a graphic. The questions running through my mind about your coil are:
1. 9x36 is the coil's ID or OD?
2. What is the difference between the id and od? (it looks like about a half inch)
3. I presume the exact dimensions aren't critical, within 5% should work as long as the turns are the same?

Sorry, did not mean to cause any confusion.

[chemelec]

Hi Chemelec,

The reason I posted that graphic is to illustrate how some confusion can come into play when details are missing about coils. This advertized coil size is different than the actual coil size. And if the actual coil has an id and od.

Perhaps it would have been better if I made a text comment instead posting a graphic. The questions running through my mind about your coil are:
1. 9x36 is the coil's ID or OD?
2. What is the difference between the id and od? (it looks like about a half inch)
3. I presume the exact dimensions aren't critical, within 5% should work as long as the turns are the same?

Sorry, did not mean to cause any confusion.

To Clarify it:

I Always State "Actual OUTSIDE Dimensions of the Actual Wire Coil".
Not the Frame that holds the Coil.

Manufacturers usually give the CASE Dimensions, Not the Actual Coil.
Definately Somewhat Misleading, I Agree.

Since the Width of the winding is about .875 of an inch, The Inside Dimensions of that 9 X 36 Inch coil are about 7.25 X 34.25 inches.

Take care......Gary

[golden]

Re:bandido ic

hi to all:
please send for me similar ic for mc33178-tlc2262-3921a in bandido II u max.i found not them. tank you

[rajesh]

DD coil is better than the mono coil for ground area.

[rajesh]

image

hi every one any body tell me how can send a image this forum with attachment......

[Qiaozhi]

hi every one any body tell me how can send a image this forum with attachment......

When you post a reply, scroll down the page to Additional Options. Then select Manage Attachments. You can upload files in pop-up window. Note the maximum sizes allowed for different file types.

[rajesh]

attachment system

hi quazhi i can up load image thanks

[rajesh]

electronic metal locator 1

hi gary could you tell me what's parformance of two coil pi md...

[chemelec]

hi gary could you tell me what's parformance of two coil pi md...

That is Impossible to say. It partly depends on How Good you make the Coils, What size of coils and what objects your searching for?

But there are also TWO DIFFERENT, Two Coil configurations for my detector.
1) Is Cancelling coils to help eliminate Hot Rocks.
2) Is Seperate Recieve and Transmit coils to possibly achieve a Greater Recieve Gain.

[rajesh]

pulses 1

That is Impossible to say. It partly depends on How Good you make the Coils, What size of coils and what objects your searching for?

But there are also TWO DIFFERENT, Two Coil configurations for my detector.
1) Is Cancelling coils to help eliminate Hot Rocks.
2) Is Seperate Recieve and Transmit coils to possibly achieve a Greater Recieve Gain.

hi gary many thank's to reply actually i need detect a bear can size metal. so i made 13.5/13.5 squar coil 300uh for hemmarhead that's working fine . rajesh

[rajesh]

t/r

hi gary i built your matel detector -1 this working at least fine. i wish to made a new trance/recieve designe for gold metal locator i need to knowan frequency relatede with gold. can you recmonde me some expalaintation. i have more time free........rajesh