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Offline GoldDigger1950
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« Reply #20 on: July 26, 2009, 08:22:42 pm »
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The eddy current collapses immediately, no delay. No kidding. That eddy current field collapse induces a current flow in the gold object which creates another, smaller series of eddy currents which create ever tinier fields. Those are the ones you detect. The size and shape of the object will determine how long the current flows and how many times this repeats until the current is just too weak to create another eddy current field.

Your smaller gating will probably cause you to miss some larger objects. Pity, that. Perhaps we both should experiment a bit more. We can get to the bottom of this, Watson!  Shocked All we have to do is look closer!!

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It's all about that moment when metal that hasn't seen the light of day for generations frees itself from the soil and presents itself to me.
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Offline Homefire
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« Reply #21 on: July 26, 2009, 08:52:44 pm »
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Your right on the Ringing.

As long as it can find a 1/8 gram nugget more then 6" down I could give a hoot! Great

This mode has not  changed the larger stuff.

It just got hotter.





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Offline GoldDigger1950
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« Reply #22 on: July 26, 2009, 09:09:53 pm »
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Quote:Posted by homefire
This mode has not  changed the larger stuff.


That you know of.

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It's all about that moment when metal that hasn't seen the light of day for generations frees itself from the soil and presents itself to me.
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Offline ksightlerTopic starter
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« Reply #23 on: July 26, 2009, 09:20:34 pm »
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So I am back to the original question... can I make it work... what would happen if I don't change the resistors? =)

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Offline Homefire
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« Reply #24 on: July 26, 2009, 09:23:24 pm »
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Nothing larger is being missed.

Next step is a Spiral Etched coil like Tesoro uses.

Just need to figure out how to plot one.

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Offline Homefire
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« Reply #25 on: July 26, 2009, 09:26:22 pm »
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Make what work?

The other coil?

Do you have a oscope?

You would need one to find the right Damping resistor.


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Offline ksightlerTopic starter
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« Reply #26 on: July 26, 2009, 09:30:07 pm »
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I am trying to go from the first type of coil to the second.... I don't know much about the model you are telling me about... are they alike?

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Offline ksightlerTopic starter
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« Reply #27 on: July 26, 2009, 09:31:31 pm »
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I have an O-scope somewhere in my garage... what would I test and how?

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Offline GoldDigger1950
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« Reply #28 on: July 26, 2009, 09:34:52 pm »
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In your first photo I see that the coil does not look like the proper coil for the XL. Did you buy it second hand or new?

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It's all about that moment when metal that hasn't seen the light of day for generations frees itself from the soil and presents itself to me.
Let's Talk Treasure!
Offline ksightlerTopic starter
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« Reply #29 on: July 26, 2009, 09:39:00 pm »
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second hand.... what should the coil look like if I may ask?

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