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Why is nulling a bad thing?
Posted by: WV62
Date: October 15, 2017 10:46AM
It seems that some are saying you need to run the E-Trac in a way that it will not null out. It also seems that the nulling is a product of the disc pattern so a completely open pattern (all metal) would be the way to go.

Yesterday I was hunting using small wire flags to grid off my hunting area and I noticed when the coil got close to the wire flag the detector would null out. So I put a dime on the ground near the flag wire and it was picking up the dime just fine.

Just looking for better understanding.

Ron in WV



Worked and lived in the Huntington West Virginia area all my life, retired 2010
US Air Force Vietnam Veteran (68-69 & 70-71)
Started getting into metal detecting around 1975

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Re: Why is nulling a bad thing?
Posted by: utmike
Date: October 15, 2017 09:58PM
I tend to look at nulling in a couple of ways...

When running high sensitivity in highly mineralized soil, I get a lot of nulling that tells me I might be running a little hot (not optimal) for conditions.

Secondly, knowing there is iron (by nulling or running an open screen)around can be a good sign of past activity in sites such as plowed fields, forests, etc... and may help you zero in on a search area.

Lastly, extremely deep coins that don't necessarily produce a tone or ID, can trigger a "bump" in your threshold audio to the trained ear (and hunters way better than me).

Hope this is accurate and helpful.

Good luck!

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Re: Why is nulling a bad thing?
Posted by: WV62
Date: October 16, 2017 08:46AM
utmike,

Running to hot never crossed my mind would cause nulling. I will check for that my next trip out.

As for those deep coins, sounds like I may want bump the threshold up a tad.

Thanks for the tips, I am always looking for ways to get the most out of my E-Trac.

These little understandings really add up once you start to understand machine.

Ron in WV



Worked and lived in the Huntington West Virginia area all my life, retired 2010
US Air Force Vietnam Veteran (68-69 & 70-71)
Started getting into metal detecting around 1975

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