Geoff,

No.

Although it might appear that sensitivity is related to wire size, it 
is actually related to the number of turns in the coil--and to get 
many turns in your coil you have to use small wire.

Brett

At 03:59 AM 2/22/2010, you wrote:
>Would it be possible to use a
>single massive (ideal) wire like 1/4 inch
>in diameter with a magnet then
>increase the voltage to be sensed
>simply narrow the wire gradually
>to like 30 AWG wire in a current loop
>to act as a concentrator to boost the voltage ?
>Sort of like water through a pipe
>which narrows suddenly ?
>Is this silly ?
>
>It seems to me you can get considerable current
>using a single heavy wire, the trick is
>sensing that current which is essentially
>only one loop of a coil.
>
>?????
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