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Gold Prospecting
Metal Detecting for Gold
Do Modern Detectors see into Rock and Quartz?
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<blockquote data-quote="nuggetino" data-source="post: 50488" data-attributes="member: 1884"><p>Soil type must play a role in depth penetration too. Testing a detector (waving a coil) in the air makes it much more susceptible to emi. I tried running air tests on targets for theoretical depth and was very disappointed in the results. It seems at least in quiet ground on my test patch I can detect targets much deeper than in the air perhaps due to a more stable threshold and coil swing. My 24' DD coil does go much deeper than the 11" dd by around 50% which is in line with jack langes predictions <a href="http://www.kamakazi.com/docsplace/jlange/confusion.html" target="_blank">http://www.kamakazi.com/docsplace/jlange/confusion.html</a> but struggles on shallow targets as expected. Have detected a four ounce lead lump at 75cms. The 11" DD struggled for a whimper at 50cms on the same test. The fact that our hearing plays a role in how deep we can detect targets is another factor. I'm sure my detector picks up nuggets much deeper than I'm able to decipher with my hearing. If I had a detector that could find a pull tab at a meter I'd be a rich man.</p></blockquote><p></p>
[QUOTE="nuggetino, post: 50488, member: 1884"] Soil type must play a role in depth penetration too. Testing a detector (waving a coil) in the air makes it much more susceptible to emi. I tried running air tests on targets for theoretical depth and was very disappointed in the results. It seems at least in quiet ground on my test patch I can detect targets much deeper than in the air perhaps due to a more stable threshold and coil swing. My 24' DD coil does go much deeper than the 11" dd by around 50% which is in line with jack langes predictions [url]http://www.kamakazi.com/docsplace/jlange/confusion.html[/url] but struggles on shallow targets as expected. Have detected a four ounce lead lump at 75cms. The 11" DD struggled for a whimper at 50cms on the same test. The fact that our hearing plays a role in how deep we can detect targets is another factor. I'm sure my detector picks up nuggets much deeper than I'm able to decipher with my hearing. If I had a detector that could find a pull tab at a meter I'd be a rich man. [/QUOTE]
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Gold Prospecting
Metal Detecting for Gold
Do Modern Detectors see into Rock and Quartz?
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