coil design for pulse 2

[ken]

Hi,

I was interested in building a pulse 2 metal detector but I was wondering if the coiling windings were flattened if this would make it even more sensitive. My reasoning is that this would catch more magnetic lines of flux. Eg (cross section)

Normal windings with wire:

OO
OOOO
OOOOOO
OOOO
OO

Why not use foil instead of wire as follows:

---------------------------------------------------------------

If we imagine the lines of flux as below, then it seems as if the
flat foil coil would catch far more flux.

^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^
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Is this a dumb idea? Has someone already tried it?

ken

[Gary Lecomte]

Most detector coils are just Scramble wound.

Your Idea of using foil becomes a problem on PI Detectors.
You need a VERY LARGE Coil to get a Reasonable Inductance value.

PCB Coils are made that way for IB (VLF) Detectors, But they are Not very suitable for PI Detectors.

Personally I find my Flat wound coil to be better.

And If your Not Knowledgeable about metal detectors, I do NOT Recommend you make the Pulse-2. If it is Not Adjusted correctly, it won't work well at all.

So Just make the Pulse-1.

[ken]

Thanks for the advice and feedback.