10x12 and Larger Butterfly Coils

[Clad2Hunt]

Has anyone used the Excelerator brand coils? I have used one on my Minelab and they are heavy. It seems on some models it might help depth but on the Golden it would not really help.

 

[Topdecker]

I have a 15x12" SEF butterfly. It is a fantastic open field coil. It gets around the same depth as the factory 9x8" coil on coin-sized items but has much more coverage. You would probably want to overlap swings by 3 or 4 inches, so you are covering 8" per sweep.

My principal problem with this coil is that it seems to have more drop off than some DD coils - perhaps due to it's size. It you are pin pointing with tip of the coil, it works great for shallow targets. But deeper ones can pin point up to 3" back from the tip of the coil and this creates some recovery problems. Once you know about it, you accommodate by opening a plug that has the target at the top edge and open the plug back towards the heel of the coil several inches.

A secondary issue, and this is probably true of all DD coils, is that the TID is not especially accurate. This coil gives a pass to a lot of steel bottle caps.

And as you suggested, it is a heavier coil. I took it to a field without many targets - and it was beastly there and was really killing my shoulder. If you are pausing every few minutes to dig targets, it a lot more manageable. I doubt that I would be able to use this coils for much more than 2 hours without switching to something more reasonable - but in 2 hours it would allow me to cover a tremendous amount soil.

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