Double "D" Coil

[bobm31]

Double "D" Coil

What are the advantages and disadvantages of a double "D" coil? Are they available for an Ace 250?.....just wondering....Bob

 

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[neilo]

Re: Double "D" Coil

double d coils are better in highly mineralised soil than the mono coils and are not as prone to interference. they also give a signal which is in a square shape running through the centre of the coil from front to back covering much more area than the mono coil which sends a signal in a v shape.this means that the double d coil can detect an area and is less likely to miss targets with depth.I am not sure whether they are available for the treasure ace or not but I am sure if they were they would help this machine operate better in mineralised conditions which it has trouble coping with with its present coil set up.
Seeya neilo

 

[hollowpointred]

Re: Double "D" Coil

as far as i know the ace 250 does not have a DD coil available for it.

 

[Sandman]

Re: Double "D" Coil

The Double D coil is misunderstood by some.? Neilo says it well, but sometimes a picture is worth a thousand words.? Visit Garretts site to see why your coil works badly.

http://www.goldminingcentre.com.au/Technical%20Data/techsheet-coils.pdf#search='double%20d%20coil%20field

 

[Doctor Detroit]

Re: Double "D" Coil

Thank You neilo and sandman for the description and web site. This explains a lot. Now I can see why it's so important to overlap your swings and keep the coil parallel to the ground.