Carl Morelandpdf Upd 'link' — Inside The Metal Detector George Overton

The story of " Inside the Metal Detector " by George Overton and Carl Moreland

At about 12 inches down, the blade of George's shovel hit something metallic. He carefully cleared the dirt, revealing a small, intricately carved wooden box. The story of " Inside the Metal Detector

4. Demodulation and Discrimination

• Phase-shift detection to distinguish ferrous from non-ferrous metals.
• Synchronous demodulation circuits.
• The “motion” necessity in VLF detectors.

• Geotech Forums: geotech1.com (search "Inside the Metal Detector" and "Carl Moreland").
• Internet Archive: archive.org (search exact phrase).
• No official "Geotech v2.0 PDF" exists as of 2025; community updates are unofficial.