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SEF 12 x 15 butterfly coil
Posted by: MackDog
Date: September 28, 2016 11:57AM
Does anyone use the SEF 12 x 15 butterfly coil for the V3i or VX3? Is it good for coin hunting? Doe's it separate well?
Thanks for any help.
Happy Hunting

Re: SEF 12 x 15 butterfly coil
Posted by: shelton7522
Date: September 29, 2016 08:11AM
Very good and little deeper than stock 10 inches. Seprate very well, and has bigger footprint.

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Re: SEF 12 x 15 butterfly coil
Posted by: Ytcoinshooter
Date: September 30, 2016 06:10PM
That's a heavy coil to swing. More coverage but only a small difference in depth. Can be tiring even with a swing assist, but that's my experience. I had that size SEF on another detector for beach and field use and went with the 12x10" SEF instead. On my V3i I have the 12x10" SEF and my new large favorite the 13" ultimate. The ultimate is a bit lighter and better balanced. It hits my 10" quarter very hard and consistent in my soil. I use the ultimate for farm fields and less trashy areas. For what it's worth my 10DD can hit that quarter.
My 2ยข...

Re: SEF 12 x 15 butterfly coil
Posted by: burlbark
Date: September 30, 2016 09:23PM
Using a swing thing to support the weight is a must. I hunt 99% of the time with my 15x12. I am called the quarter snob of my group because I find so many of them. Its a very good coil but it only has a 6 month life expectancy until it starts to false with a gain greater then 6 when its cold and 4 when its hot. It does not matter the frequency you chose and this is on a white unit. That being said a gain of 4 finds wheats at 6" plus and quarters at 10" and is very quiet with great separation.

Re: SEF 12 x 15 butterfly coil
Posted by: MackDog
Date: October 01, 2016 06:52PM
I run the Big NEL 17 on my At Pro so I know about heavy. Hopefully will last longer.

Re: SEF 12 x 15 butterfly coil
Posted by: LS hunter
Date: October 15, 2016 11:26PM
I started with the stock 10DD on my v3i..Went to the SEF 10x12 I love it but it's no so go in trashy Area's where one will most likely be hunting for coins like Parks and such..I have had good luck with the SEF 6x8 in such areas of course you lose a little depth.... just my two cents..

Re: SEF 12 x 15 butterfly coil
Posted by: MackDog
Date: October 16, 2016 11:53PM
Got the Detech SEF 12 x 15 coil. Took it out to a very hunted out park today. Scored 1912 D V nickel, 1900 Barber dime, 1903 IHP, 1942 Merc and 3 junker pieces of jewelry.

The depth is always deeper than the displayed depth. It does hit deeper and covers more area. My buddy ran his CTX the whole time and didn't do too hot. Thanks for looking.

Re: SEF 12 x 15 butterfly coil
Posted by: veter
Date: October 21, 2016 05:25PM
This will have the same depth 13 Ultimate. Just more weight and size.

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Re: SEF 12 x 15 butterfly coil
Posted by: Ytcoinshooter
Date: October 28, 2016 07:00AM
Hey MackDog, nice going. It would have been telling if you and your buddy could have compared signal response over some of those targets before digging. Hey just may not have swung over those goodies. My friends that are running the CTX do very well on deep targets. Think about reporting back after more time with that monster coil.

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