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Here's a video I did to show the attributes of an excellent designed DD coil on the MXT-PRO

K

Keith Southern

Active member
Its jsut a basic test using a red clay brick form an 1840's era house site....this is a hand fired red clay North Georgia brick.....

Test is to use the MXT-PRO in relic mode 2 tone with user set tone break....just barely set to low tone a nail...dead on 2 on the disc...

place a modern nickle under a red clay brick and see what type response it can get

first coil I used is the 6x10 DD elliptical eclipse model by White's
Second coil is the S.E.F. 8x6 coil......

you will notice the S.E.F. coil is night and day difference in response in the test......

Coil design is evolving and you can see the performance the newer design's offer...

I am a firm believer that coil design is the only logical path to take in VLF technology for better performance...

The MXT-PRO with the added features are about as perfect of a detector as one could ask for especially in relic hunting in bad dirt...and the newer tech coils makes it a true top end world class machine in a simple package...

http://www.youtube.com/watch?v=pBT5idh8_Kk


Keith Southern
 
[size=large]someone on you tube did the same kind of test comparison but with the minelab coil. the SEF did much better on the vid also.
the differance was the guy on you tube found a ground target and did the comparison before digging the target. i agree the SEF's seem to be coming out better than the standard versions.thanks for the test.

HH[/size]
 
Interesting test and I have to agree with what you said about the coil technology, but I wonder what would happen if you ground balanced to the minerals in the brick since that is the ground one would be hunting in? I also missed if you had ground tracking on or if it was locked.
 
That's vey intriguing . . I'd like to see a similar comparison between the D2 and the 10x12 sef. As Larry asked, what ground track setting were you on ? I'm surprised you didn't get any interference from reinforcing steel in that cement slab. Thanks for the video . . .appreciated.
 
stupid thing is cracking !!!!!

That area is clean form target's.....

I have had the D2 and the S.E.F. 10x12 .....The D2 does not see it.....the S.E.F. does......the D2 and the 10x12 are very similar to each other as far as depth... the 10x12 is a little deeper ........


Keith
 
if I balance to the Brick the 6x8 hits it better and the 6x10 still is a no go......

the main purpose was just to show the added benefit of the butterfly......


of course the Brick is extremely,,,,extremely,,,, dense and mineralized....but great for testing......

Thank's

Larry..

Keith
 
Your welcome widebody.....

Yes coil design is improving in the last few year's...

Thanks

Keith
 
Interesting results, I knew the SEF coils had better ground rejection from beta testing on the V3 project but I didn't realize that it had that much of an impact in very mineralized ground.
 
Don't let Keith's video confuse too many of you. Keith showed how the SEF coil configuration does well ignoring extremely mineralized ground (as designed) which affects a very small percentage of us. Most wet salt beaches are completely the opposite with no mineralization and is mostly conductive alkaline based with the exception of the black sands in California. A PI detector is almost a must in black sand. In mild or medium or no mineralized ground the conical coil is often the best choice for depth. I have heard of many problems with a DD/SEF coil on white sand beaches. (falsing)
 
Interesting, If I ever start detecting over bricks I'll know which coil is best.
BB
 
[size=large]well i for one got the point[. so i have a 8x6 sef coil on the way. last night i found my second silver of the year and in my life with the 8x6 on my minelab. it was at least 7" down and came up as a dime/ quarter vdi. unlike the manufactured vids of their products where there stuff always wins i think this was just a thrown together test that wasn't fixed but honestly showed how one coil works better than the other.

HH/size]
 
Excellent job with the video! These actual tests showing coil vs coil or detector vs detector for the same target in the same configuration are excellent! Thank you much :thumbup:
 
[size=large]what's ordinary? i'm putting my money on the SEF coils. i've seen and heard enough from non-dealers using non-rigged test to convince me of my choice. the company coils have picked up signals in test but the SEF sounded with stronger signals and will go down just as deep or better. jmho. if one wants to stay with the company coils then do so. i don't have a 6x10 so i can't say it's worse or better really. i just think the SEF will be better.
maybe i'm wasting my money. maybe not.

HH [/size]
 
[size=large]Kieth, can you tell me how the 10x12 compares in weight to the D2?

HH[/size]
 
the S.E.F. coil is a very deep coil for it's size...

Hope this help's

Keith
 
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