dcleghorn said:
[size=medium]First post here. Thinking of getting a MX7.[/size]
Welcome to the Forums here for White's.
dcleghorn said:
[size=medium]Would the 6x8 sef butterfly coil work on an MX7 machine?[/size]
The 6X8 SEF coil, to my knowledge, isn't currently made for the MX Sport or Mx-7. Also, search coil selection can be a very personal or individual thing, often influenced by past experience, what we hear from other's uses, or the marketing done to promote a product. I like to read the marketing and try to separate the hype from the facts or potential field results, then I like to put one to the test afield and compare it with other coils for balance, feel and performance.
I've spent most of detecting career of fifty-three years in trashy to above-normal trash-filled sites, therefore my search coil preferences have been toward smaller-than-stock size search coils to better handle working in and around junk. They don't make that size SEF for the MX-7 or Sport models, that I know of, but I have used that size coil on other makes and models tom include the White's MXT Pro/All-Pro which used to be my primary-use detector.
I found that,
for me and the sites I search the most, the 6X8 SEF just wasn't a very good coil. I compared it against the 10" DD coils from Detech and White's, 950 and 9" Concentric coils from White's, the 6X10 Double-D coil, the Detech 6" round DD coil and White's 6½" Concentric coil. The 6X8 SEF generally behaved similar to other Double-D coil designs that didn't handle iron trash rejection as well as a Concentric, didn't seem to provide consistent visual 'lock-on' as well as a Concentric, and the depth-of-detection was usually no better than a comparable sized Concentric.
dcleghorn said:
[size=medium]Would it or the coil the MX7 comes with be best?[/size]
"
Be best" for what? The MX-7 comes standsrd with a 950 Concentric coil and I find that coil size and type to
"be best" for me when hunting dry sections of beaches, sports fields, and open areas of larger-size parks where there are minimal targets
[size=small](accepted or rejected)[/size] to hamper detection depth or mask good targets. Other areas would be open fields, rangeland, and similar areas with sparse target content and a large area to cover.
What applications did you have in mind for a 6X8 SEF Double-d coil? I wouldn't expect it to provide the depth of performance from a larger-size coil, such as the 9" spider or 950 Concentric sized coils [size=small]
(And I wish White's made the 9" for the MX-7)[/size]. Nor will that coil fit in and around trash, or feel as comfortable as some smaller-sized coils, such as the Detech 7" DD made for the White's MX-7, or the soon-to-be-released 6½" Concentric coil from White's.
Back when I worked with the 6X8 SEF on MXT series units, or when I worked with others who had that coil for their units, my field results narrowed my coil selection to only two search coils for my MXT Pro and All-Pro models. The open-frame 9" Concentric for more open area searches, and the 6½" Concentric for the bulk of my hunting where conditions are trashier. Of about 6-to-8 others who had a 6X8 SEF and then borrowed or bought a 6½" Concentric coil to compare afield, only one of them liked the feel and performance enough to keep the 6X8 SEF. The others kept or bough the 6½" Concentric coil for working trashier or more confined areas.
Today I have multiple MX-7's and my coil picks have varied only slightly. I have the 6½" Concentric mounted on my most-used MX-7, and a 950 mounted for open area hunting. I do have the newer 7" Detech DD mounted to my 2nd MX-7 for certain uses. I do use it for some of my day-to-day hunting when the trash level is mild to moderate, but it is the search coil I prefer to use when I am working a water body because it is an open-frame design that doesn't 'float' like the solid-body 6½ and 950 coil do. Those are the only three coils I like to juse for the various siste environments I hunt because they are a nice fit, they balance well, and they work even better for what I need.
Monte