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May 21, 2026 - 03:40 PM
The DD (Double-D) coil configuration uses overlapping transmit and receive windings that cancel ground mineralization interference while preserving target response. This geometry maintains stable target ID in red clay, black sand, volcanic soils, and iron-rich ground where concentric coils produce false signals and unstable VDI readings. The LG28's DD design is the reason it excels on relic sites, beaches, and historical grounds with challenging soil conditions. Learn more about metal detector search coils and how geometry affects ground balance and target separation.
