Impedet

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Result for one coil.
[ATTACH]43422[/ATTACH]

Thanks for measuring. Much appreciated.

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Maybe good for pinpointer.

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I think it is ridiculous idea.

[Andi68]

Try it !

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Now that is very interesting.

[chevesne]

Result for one coil.

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Thanks Ivca.

[ivconic]

Yes, Thanks for reminding me. I have some of these, but never thought about using them like this to test circuit. That's why I was asking about the inductance. I am embarrassed to say that I don't have inductance meter to measure them.

And i am embarrassed to say that i never really measured it's inductance... or i don't recall i did.
I just picked up it randomly, point was it is small.
Suitable for rough bench testing, not picking up too much noise.
Despite the coil; detector is "slow" anyway. It is designed that way.

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I traced a layout for this detector in sprint, maybe useful for someone.

[Andi68]

I also have no inductance meter, my cheap multimeter has integrated this function.

But I mean, the inductance is not as important as it is always claimed.

Rather the overall concept of the coil, do not know how to explain it ....

[dbanner]

Yes, Thanks for reminding me. I have some of these, but never thought about using them like this to test circuit. That's why I was asking about the inductance. I am embarrassed to say that I don't have inductance meter to measure them.

[Andi68]

Ok, but with this small diameter a planar development is rather bad

[kt315]

http://philipstorr.id.au/pcbook/images/ex3t4.jpg

[Andi68]

The coil in the video looks very strange

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Sure it was... back in 1992.
It was sold in Conrad back than in 1991. as kit.

[ATTACH]43374[/ATTACH]

Is that the same circuit? Well if it is, I find that the response isn't sharp enough for my liking. Could you say what is the inductance of the coil seen in video?