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Gold Prospecting
Metal Detecting for Gold
Atmospheric EMI interference
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<blockquote data-quote="Hawkear" data-source="post: 646329" data-attributes="member: 4728"><p>Thanks for that.</p><p>That is a wonderfully informative article written by Bruce Candy and certainly answers a few of the EMI observations I have noticed.</p><p>Why when detecting close to a big town EMI picks up at certain times of the day usually later - maybe because people getting home start turning on appliances en masse.</p><p>Static discharges when just touching dry grassy clumps on low humidity days</p><p>Sferics as he calls them being multi sourced from near and far electrical storms.</p><p>He certainly allows for sferics to be manifested not only as transient signals to be heard clearly from lightning up to 1000 km away But also from far wider afield as threshold instabilities.</p><p>Maybe the lesson is to keep an eye out on the wider weather forcast for lightning activity and just be thankful for the better days or if there is the chance of major lightning activity within up to 500 or 1000km, just go somewhere else where you can engage in detecting that requires less gain.</p></blockquote><p></p>
[QUOTE="Hawkear, post: 646329, member: 4728"] Thanks for that. That is a wonderfully informative article written by Bruce Candy and certainly answers a few of the EMI observations I have noticed. Why when detecting close to a big town EMI picks up at certain times of the day usually later - maybe because people getting home start turning on appliances en masse. Static discharges when just touching dry grassy clumps on low humidity days Sferics as he calls them being multi sourced from near and far electrical storms. He certainly allows for sferics to be manifested not only as transient signals to be heard clearly from lightning up to 1000 km away But also from far wider afield as threshold instabilities. Maybe the lesson is to keep an eye out on the wider weather forcast for lightning activity and just be thankful for the better days or if there is the chance of major lightning activity within up to 500 or 1000km, just go somewhere else where you can engage in detecting that requires less gain. [/QUOTE]
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Gold Prospecting
Metal Detecting for Gold
Atmospheric EMI interference
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