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Metal Detectors
Minelab
Testing a used GPX4500
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<blockquote data-quote="Hawkear" data-source="post: 678476" data-attributes="member: 4728"><p>Remember also if you are testing in a built up area, you will not be able to hear a steady threshold due to EMI interference from electricity supply lines. You need to get well away from electricity poles, telephone towers etc. You are testing to hear a very stable threshold sound.</p><p>Check the physical condition of everything especially coils.</p><p>Also take some small test metal objects eg 0.1 or 0.2 g sized lead shot if you have no gold. Make sure you can get a decent signal from those.</p><p>Look for a clean detector. A clean condition is a sign that a proud owner has looked after his or her gear.</p></blockquote><p></p>
[QUOTE="Hawkear, post: 678476, member: 4728"] Remember also if you are testing in a built up area, you will not be able to hear a steady threshold due to EMI interference from electricity supply lines. You need to get well away from electricity poles, telephone towers etc. You are testing to hear a very stable threshold sound. Check the physical condition of everything especially coils. Also take some small test metal objects eg 0.1 or 0.2 g sized lead shot if you have no gold. Make sure you can get a decent signal from those. Look for a clean detector. A clean condition is a sign that a proud owner has looked after his or her gear. [/QUOTE]
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Metal Detectors
Minelab
Testing a used GPX4500
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