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Power Lines Interference
Posted by: johnva
Date: September 10, 2016 08:21PM
Hi,

Just purchased an MXT ALL PRO & have been having issues detecting near power lines? Any suggestions to cut down the chatter ?

Thanks,
John

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Re: Power Lines Interference
Posted by: Nancy-IL
Date: September 11, 2016 07:09AM
All you need to do is turn your sensitivity down.

http://www.findmall.com/read.php?36,2316167,2316167#msg-2316167



Nancy - Central Illinois
Am I getting rich? No, just having fun!

MXT
MXT PRO
with an arsenal of coils.

*Peoria Area Treasure Hunters: Member since 2000.
President 2013, 2014
Secretary 2010, 2011, 2012.
Vice President 9 years.


The General: 02/04/2008 - 03/05/2016. R.I.P. Big Boy and we'll see you at Rainbow Bridge

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Re: Power Lines Interference
Posted by: vito
Date: September 12, 2016 09:30AM
Quote
johnva
Hi,

Just purchased an MXT ALL PRO & have been having issues detecting near power lines? Any suggestions to cut down the chatter ?

Thanks,
John

What I did in areas below power lines was,
switched to relic mode 2-tone iD,
threshold all way dawn,
sensitivity way down to a level of tolerability.

When I heard the chatter I put a coin on the ground and
then swept the coil over it.
The sound for the decected coin was loud and clear.
And with that knowledge the whole area was hunted.
No big finds were made, but better than nothing at all.

@Nancy - Thank you for referring to the photo...:detecting:

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Re: Power Lines Interference
Posted by: Nancy-IL
Date: September 12, 2016 12:41PM
Vito, Your photo was the first thought when I thought of the EMI. I love your photo and I hope you didn't mind me posting it here.



Nancy - Central Illinois
Am I getting rich? No, just having fun!

MXT
MXT PRO
with an arsenal of coils.

*Peoria Area Treasure Hunters: Member since 2000.
President 2013, 2014
Secretary 2010, 2011, 2012.
Vice President 9 years.


The General: 02/04/2008 - 03/05/2016. R.I.P. Big Boy and we'll see you at Rainbow Bridge



Edited 1 time(s). Last edit at 09/12/2016 05:44PM by Nancy-IL.

Re: Power Lines Interference
Posted by: MI-AuAg
Date: September 12, 2016 01:44PM
Quote
johnva
Hi,

Just purchased an MXT ALL PRO & have been having issues detecting near power lines? Any suggestions to cut down the chatter ?

Thanks,
John

Hello johnva,

Here is a few. Smaller search coils pickup less EMI than larger ones. Concentric coils pickup less EMI than DD's. You get less EMI directly under the powerline, worst at a 30 to 45 degree angle away from the powerline. EMI may be more controllable in All Metal mode, as opposed to Discrimination mode.

Those are all suggestions written by Dave Johnson, the Design Engineer of the MXT.



Edited 2 time(s). Last edit at 09/12/2016 01:57PM by MI-AuAg.

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Re: Power Lines Interference
Posted by: vito
Date: September 13, 2016 11:01AM
That is some good stuff to read for sure, MI-AuAg.

If some one is interested do a Google search for:
Dave Johnson's Essays

Re: Power Lines Interference
Posted by: MI-AuAg
Date: September 13, 2016 11:08AM
Quote
vito
That is some good stuff to read for sure, MI-AuAg.

If some one is interested do a Google search for:
Dave Johnson's Essays

No doubt about it vito. I've read all his essays, good information for sure!

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