Originally posted by bbsailor
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This discussion on ferrites was started when josewashere found the MPP and both his Surf-PIs were responding to the ground on his lawn. I suggested the cause was iron contamination in the soil, and that an air test using a ferrite pot core (as a target) would prove this, as it would not be detected at higher delay settings. It was found that a ferrite core and a ferrite ring are easily detected due to their composition and shape. We were not actually discussing using the ferrite as part of the coil, just as a target.
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