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Gold Prospecting
Metal Detecting for Gold
Difference between Mono and DD coils? When to use?
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<blockquote data-quote="Guest" data-source="post: 92492"><p>Good question. I've never checked any targets but people have told me a general rule of thumb is that the DD will detect approx. the same depth as the next size down mono i.e.</p><p></p><p>18" DD > 14-16" Mono</p><p>14-16" DD > 11-12" Mono</p><p>11-12"DD > 8" Mono</p><p>etc.</p><p></p><p>Would be interesting to see actual results but by design mono's should/would be punching deeper. How much by I don't know?? I guess even if it was only an inch or two that is an advantage.</p><p>I wouldn't be too worried about that 11" DD you got Karl. They still punch deep enough & I have dug some bloody big holes using one + my old SD2200D. One hole I remember fondly, NOT :lol:, was about 2 foot down (my pick handle is about 650mm & the hole was nearly as deep as it is long). Beautiful woowoo sound from the surface & the closer I got the louder it got. Thought this is either an ounce + nuggy or a flamin' horse shoe. Ended up being a metal boot heel off an old timers boot - took me about 20-30 mins to dig up in hard ground.</p></blockquote><p></p>
[QUOTE="Guest, post: 92492"] Good question. I've never checked any targets but people have told me a general rule of thumb is that the DD will detect approx. the same depth as the next size down mono i.e. 18" DD > 14-16" Mono 14-16" DD > 11-12" Mono 11-12"DD > 8" Mono etc. Would be interesting to see actual results but by design mono's should/would be punching deeper. How much by I don't know?? I guess even if it was only an inch or two that is an advantage. I wouldn't be too worried about that 11" DD you got Karl. They still punch deep enough & I have dug some bloody big holes using one + my old SD2200D. One hole I remember fondly, NOT :lol:, was about 2 foot down (my pick handle is about 650mm & the hole was nearly as deep as it is long). Beautiful woowoo sound from the surface & the closer I got the louder it got. Thought this is either an ounce + nuggy or a flamin' horse shoe. Ended up being a metal boot heel off an old timers boot - took me about 20-30 mins to dig up in hard ground. [/QUOTE]
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Gold Prospecting
Metal Detecting for Gold
Difference between Mono and DD coils? When to use?
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