Question about GT coil sweep and signal projection

[Gilligan]

Do you need to be careful to overlap your sweeps with the double D coil? My understanding is that instead of sending a cone-shaped signal into the ground, the double D sends the signal down the entire area under the coil. Thanks for any info, Bryan

 

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[Sandman]

Overlaping is not as important with a DD coil for the reasons you said. The field of a DD coil is more like a D laying on it's side while a concentric is more like a V. You should still overlap some for best coverage.

 

[vondrewvious]

http://www.garrett.com/hobby/techsupport/techsheets.htm
Click on the search coil PDf.
This is a very informative tech sheet on the different types of coils.
Eventhough it is written by Garrett, it appleis to all brands of coils.

 

[Gilligan]

Thanks for the info