Critterhunter
New member
I was thinking about this the other day. People tend to use a large coil first to work a site and then go back later with the smallest tiny trash coil they have to re-work the trash for any masked stuff they missed before. Only problem with that is that you are jumping from a large coil with great depth, all the way down to a tiny coil that will of course unmask more stuff, but at the same time you are going to probably get a good bit less potential depth (although I find the S-5 is stellar in it's depth ability). So, say the stock 10" coil might be deeper enough for a coin but is too big and so the coin is masked by nearby trash or iron, but then you go to the S-5 or 5" Excelerator and it can now easily miss the trash and see the coin that the trash is surrounding, but now the depth isn't quite enough to reach the coin. So by stepping down to say the 7 & 1/4" "Eight Inch" Tornado coil, that might be enough now to see between the trash surrounding the coin, while still having that extra bit of depth to reach the coin that a smaller coil doesn't have. See what I mean here? By stepping down in small stages from biggest to smallest when you re-work a site, you'll be sure to get as much as you can. By the same token, by completing the task with a tiny coil like the S-5 or 5" Exelerator, you are still going to pull more coins that even the excellenent separation of the 8" coil (7 & 1/4") couldn't see in some cases due to trash proximity.
By the way, I heard the Coinsearch coil's windings are actually smaller than a true 8" coil even though the case is 8", and we just saw somebody measure the 5" Excelerator and it's a bit smaller than that too. Where as the tiny S-5 is 5.5" big. I can't imagine how much smaller that Excelerator looks on the end of the shaft, because the S-5 feels like using a hockey puck. Heck, even the 7 & 1/4" BBS coil on my friend's Excalibur looks like a hockey puck to me. I can see why many are fans of the Minelab 8" coils for excellent separation, and that's probably why many guys pick the Tornado 8" as their primary coil, because it's got really good depth (heard of coins around a foot deep with it) and yet will separate very well. I bet using that coil you're also getting coins at pounded out sites that other machines using a true 8" coil aren't seeing due to nearby trash, and yet still you are punching just as deep as other machines using a much larger coil on those.
Terms of bigger coils, the 12x10's left/right separation is outstanding. But just the same, the length being 12" is going to mask some stuff a smaller coil might see. If you use the 12x10 or 10" Tornado to work a trashy site, re-grid again at a 90 degree angle, because the nature of the DD detection line means a good DD coil with a sharp field (like both of these coils, but the 12x10 is even sharper) means you won't be leaving too much behind, because the left/right separation on a *quality* DD like these two (many DDs are not so great at left/right separation) means by re-griding at 90 degress you are increasing your chances to separate those coins from trash that are right next to them, where as at the other angle both might be under the DD line at the same time, and when that happens it's game over due to the nature of detecting fields and how they only see one target at a time (the shallowest one in the field).
By the way, I heard the Coinsearch coil's windings are actually smaller than a true 8" coil even though the case is 8", and we just saw somebody measure the 5" Excelerator and it's a bit smaller than that too. Where as the tiny S-5 is 5.5" big. I can't imagine how much smaller that Excelerator looks on the end of the shaft, because the S-5 feels like using a hockey puck. Heck, even the 7 & 1/4" BBS coil on my friend's Excalibur looks like a hockey puck to me. I can see why many are fans of the Minelab 8" coils for excellent separation, and that's probably why many guys pick the Tornado 8" as their primary coil, because it's got really good depth (heard of coins around a foot deep with it) and yet will separate very well. I bet using that coil you're also getting coins at pounded out sites that other machines using a true 8" coil aren't seeing due to nearby trash, and yet still you are punching just as deep as other machines using a much larger coil on those.
Terms of bigger coils, the 12x10's left/right separation is outstanding. But just the same, the length being 12" is going to mask some stuff a smaller coil might see. If you use the 12x10 or 10" Tornado to work a trashy site, re-grid again at a 90 degree angle, because the nature of the DD detection line means a good DD coil with a sharp field (like both of these coils, but the 12x10 is even sharper) means you won't be leaving too much behind, because the left/right separation on a *quality* DD like these two (many DDs are not so great at left/right separation) means by re-griding at 90 degress you are increasing your chances to separate those coins from trash that are right next to them, where as at the other angle both might be under the DD line at the same time, and when that happens it's game over due to the nature of detecting fields and how they only see one target at a time (the shallowest one in the field).