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Working on PCB-IB PI-Coil

Hey BB, The coil I use is either a Dual D or a Concentric coplanar coil. Follow the link for the details of how to build the coplanar coil. PIB's can only discriminate when using a balanced searchcoil. They cannot discriminate using a mono coil.
 
Hi Aziz,
While researching patents for reference use, I stumbled onto one that relates to the experimentation you are doing. Go to www.uspto.gov and use their search engine to find patent no: 5,856,445
Al West
 
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