This book is widely considered the "bible" for understanding the technical theory behind metal detection technology. Rather than a standard user manual, it is an engineering textbook that explains how machines distinguish between different types of metals and ground minerals.
Because metal detector manufacturers (Minelab, Garrett, XP) prefer hobbyists buy finished products, not build clones. Some SEO has suppressed the PDF. Use direct site search: site:geotech1.com "Inside the Metal Detector" pdf . This book is widely considered the "bible" for
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