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The Coiltech WOT & Detech SEF 15x12 Size Comparison
Posted by: Critterhunter
Date: July 15, 2012 01:11PM
The Coiltech WOT, which I believe is 14.25" in size, was I think the first aftermarket coil made for the Sovereign (?). It has earned it's reputation and many favor it for water hunting or hunting large fields, as well as trying to gain depth in hunted out spots because of it being a larger coil than stock. It is still made to this day for the Sovereign by Coiltech and has a large following.

The 15x12 SEF, along with the 12x10, came out roughly about 3 years ago or so for the Sovereign. They are still made but can be hard to get lately as Kellyco always seems to be waiting for shipments off and on. Detech is making many of these and several other coils for various machines and seems to be swamped with orders all the time. You may have more luck finding them used or on @#$%& or directly from Joann Detectors or somebody over seas. Detech also sells an 18x15 and a 21xsomething size of the coil, but both of those are well beyond size in terms of depth gains on coin or ring sized targets. I found even the 15x12 *in my soil* did not get the depth of the 12x10 on coin/ring sized targets and also wasn't as deep as the stock 10" Tornado in my soil for thos, but for some reason it did get deeper than stock on those targets in my mineralized sand sites. Some do report depth gains on coin/ring targets in their soil, though over stock. I suspect it depends on how mineralized your soil is. The 12x10 for me is for sure deeper than stock or the 15x12 on land. The only source of these SEF coils in the US new is via Kellyco. If you tell them you want the Findmall special they'll give you free shipping. The Sovereign versions of these coils can be hard to find on their site though, so probably better to call and ask for JW as he seems to be up on finding them I think.

I found the 15x12 was too much drag for my tastes in the water due to it's shape, but I don't hear too many complaints about the WOT in the water, so I suspect due to it's shape the WOT is more sleek and less resistance in the water. I haven't tried my 12x10 in the water yet because my stock 10" Tornado stays on my water rig as the 12x10 is my every day land coil.

Anyway, here's some pics of the 15x12 and WOT for size comparison laying over each other. As you can see, the WOT is slightly wider at the very center, but the 15x12 retains it's width more over a longer span of the length and is also a bit longer than the WOT at the tip and tail. For that reason, the SEF will give you slightly more ground per sweep covered length wise I would think. As most know, DD coils tend to have a detection line running from tip to tail of the coil. Think of it as a wiper blade, so you can see how length=more coverage IMO.

I would love to see somebody do some depth tests of these two coils head to head to see which gets deeper in sand and on land.

These photos are courtesy of Ra-Mo. Maybe he'd be the guy to ask about what he thought of the two performance/depth wise. I think if you search for "wot, 15x12" (all words, any date) in this forum you can find some comparison opinions on them both from those who have owned both...



mining members for own forum



Edited 2 time(s). Last edit at 07/15/2012 01:13PM by Critterhunter.





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