|When there is a requirement to ensure you are hunting for the deep targets then this is the coil to use. This very large shaft-mounted coil ensures that you can cover the ground more efficiently and have a good chance of finding targets which the smaller coils may have missed. However, being such a large solid-designed coil it can be difficult to use in tighter areas and get heavy if used all day.
This coil is best used at the start of the day when the body is fresh and can handle a few hours with this tool. Extra bungee cords or other products which help take the weight off the shoulders will be essential if you do wish to run this coil for longer periods. A slow – very slow swing speed will allow the ability of this coil to be optimized as fast movements can sometimes create tracking problems with larger coils. This can then mean targets are missed and depth. It does have reasonable sensitivity to the smaller targets but of course these need to be closer to the surface.
1. DD PRO
DD PRO operation hints & tips
This is by far the best configuration to use for a coil of this size. The DD ability will help with the mineralisation in the ground especially where it can become changeable and more mineralised. The DD will have a blade like effect down the centre of the coil when swinging so you will need to overlap the swings by about a quarter of a coil.
To pinpoint, use the cross hair method and approximately 2 inches in from the tip of the coil is the initial reactive area so this can help retrieve the target quicker.
It will take some practice to master this coils pinpointing ability. We can suggest you have a smaller coil or pinpoint probe on you when you are digging those large holes to help direct the efforts.
Open areas which are clear of vegetation and rocks will help ensure an easy swing and allow the coil to stay close to the ground for deep penetration.
nti-Interference (A.I.) operation hints & tips
When you are requiring good performance in high interference areas then this coil can help improve your chances.
Even though it is a large coil it can still have good performance when patch finding or searching for deep targets.
When swinging large coils like this the user must be aware that the sensitivity of the coil is reduced so expecting to find sub gram targets at depth can give false impressions of this coils ability.
It can see small targets like these but they more than likely need to be close or on the surface for a good response.
Working slowly with this coil will also help with its stability and responsiveness. As it is a large coil it ‘looks’ at a large section of ground under it so if the soil mineralisation increases or is changeable then you can experience some tracking noise.
All Anti-Interference coils can be noisy when the ground mineralisation is medium to high or is changeable. However if you require to cover the ground efficiently and want to find deep large targets in an area of interference then this coil is a great option.
Great for deep searching
Very robust coil
Good for open terrain searching
Good ground coverage
Good stability when swung slowly
Can be used in a drag format
Quite heavy when used for longer periods
Hard to swing in tight terrain
Reduced sensitivity to sub-gram targets
Applicable metal detectors
Minelab SD Series
Minelab GP Series
Minelab GPX series