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100th E-trac Gold, a tiny 1928 pendant
Pro coil, manual sensitivity = 26, noise cancel #11, audio gain = 30
Day 1. Got my 99th gold near the waterline in the low tide zone. The reading was 35-01/02, almost identical to a small piece of aluminum soda can that I had detected several meters earlier. Was also finding deep pull tabs and beaver tails before getting the ring.
Days 2-3. Got some
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Digs_alot
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Thomas Dankowski Metal Detecting Forum
A few months ago, I found several very thin, very light weight aluminum bracelets with a diameter of around 4 inches. They read 12-47, just like a quarter, but sounded sharper and narrower than a quarter. Using the E-trac with the Pro coil, auto +3 (sensitivity at about 21), a bracelet could be detected over 2 feet from the coil. The great depth and sharpness of the tone initialized the questions
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Digs_alot
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Thomas Dankowski Metal Detecting Forum
Ring vs. Coin Eddy Current Questions.
In Minelab’s “Metal Detector Basics and Theory” by Bruce Candy, under section 2.8, indicates that
“all metal targets have distributed time constants.”
It also says that
“The only targets that have first-order-like time constants are non-ferrous rings. Even coins do not approximate first-order targets particularly well, and irregular shaped targets
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Digs_alot
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Thomas Dankowski Metal Detecting Forum
Dan-Pa. Wrote:
-------------------------------------------------------
> Perhaps you are onto something and perhaps not my
> first question is are these changes stable from
> area to area or do they change when you change
> areas...if so probably do more testing than
> hunting or carry a notebook for each area or
> particuliar coil which could become mind boggling
> a
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Digs_alot
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Thomas Dankowski Metal Detecting Forum
E-TRAC NOISE CANCEL TARGET ID SHIFT?
I posted this on another forum, but others there may not have encountered these shifts.
The reason for this post is for further understanding of manual Noise Cancel and its other possible uses. Much of the info is based on personal experiences with Noise Cancel, and other parts are based on air-tests and speculation. The Noise Cancel function must be qui
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Digs_alot
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Thomas Dankowski Metal Detecting Forum