Trouble pinpointing

[OldJerseyGirl]

I have a White's MXT pro and use a DD coil. Most all places I hunt are very trashy. I have a terrible time pinpointing. I do eventually find my target, but wish it were not necessary to enlarge the whole. I also have a Minelab XCal. Same problem. I run it both ways and think I have it right on, but it seldom is. Any advise.

 

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[wainzoid]

I would lay a few coins on the ground and try pinpointing them. Make sure there is nothing else there (clean ground). Sweep the coil maybe 6-8" above them and see how they signal.
The BH that I started hunting with ... the target was always a little off center, toward the 'heel' of the coil. With my Fisher... the target seems to always be just to the left of center. On my Minelab... its always dead center with the factory coil. I haven't used my other coils on it for a couple yrs but seem to remember they were dead center also.

 

[Frankn]

Here's the dark secret that coil mfgr. don't tell you. DD type coils do not pinpoint well. It is there nature because they are composed of two offsett coils. A concentric coil, on the other hand has both coil centers in the same spot, and that spot is where the target is indicated. The PI detectors have a similar pinpoint problem, but it is because they transmit and receive at different times consecutively.
The solution is to 'pinpoint' with the lead edge of the DD coil. That is move the DD coil towards the target. When it sounds off, the target is just under the lead edge of the DD coil.
Frank...

Here's an added note. The lead edge of the DD coil can be the side of the coil moving towards the target.

 

[OldJerseyGirl]

Thank you. Good to know. I will try that with the DD coil. And the Minelab will try dead center. Thanks again.

 

[DeepseekerADS]

Here's the dark secret that coil mfgr. don't tell you. DD type coils do not pinpoint well. It is there nature because they are composed of two offsett coils. A concentric coil, on the other hand has both coil centers in the same spot, and that spot is where the target is indicated. The PI detectors have a similar pinpoint problem, but it is because they transmit and receive at different times consecutively.
The solution is to 'pinpoint' with the lead edge of the DD coil. That is move the DD coil towards the target. When it sounds off, the target is just under the lead edge of the DD coil.
Frank...

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Frankn is correct as I have seen. Had never used a DD coil before, read the E-Trac manual, and used the pinpoint function, and my digs were always way off. Then I started using that they call the "wiggle" method, just nudging up to the front notch to the signal, then doing it from 90 degrees, and now my my digs are on the mark.