coils for X-Terra

[BarnacleBill]

You just need to get the Lesche Ultra with the special BES (Bidet Equipped Sheath).

HH
BarnacleBill

 

[mrwobbly69]

Thank You All This Has Answered A Newbie Biggest Question. Cheers

 

[mrwobbly69]

Thanks Digger & Bill that was just the info i was looking for. This hobby sure has some good people in it. Cheers from Aus

 

[David]

My decision to note the 3KHz for high mineral use is based on a couple of different factors. While testing the X70

But since the above is just the experience of one individual on a forum, I have included below a section of the manual for a White's DFX, so that you can also see this is not any hype from Minelab, or the ravings of a metal detector lunatic.

"1 Frequency (3 kHz) - Operates at 3 kHz exclusively.
Provides for superior high iron mineral rejection
and depth when salt is not present. Also provides
for better depth on higher conducting metals such as
copper and silver alloys.
1 Frequency (3 kHz) provides an alternate search
mode when iron (without the presence of salt) is
extreme and the primary target is higher conducting
metals such as copper or silver. Some of White's
early 1970 models operated at 3 kHz and are still
revered for there performance in high iron black
sands."

HH
BarnacleBill

Really good stuff in this thread, thanks B. Bill and Digger(Randy). IMO the reason why the 9" HF & MF CC's are not and the 9" 3 kHz(LF) CC is recommended for hunting in iron mineralization is simply in laymans terms because the 3 kHz LF rejects low conductive brass, lead, gold, and iron the best of all frequencies. Thus the 9" LF CC will reject iron mineralization the best strictly due to its frequency.

Another way to reject iron mineralization is with a DD coil of any frequency which see's about 70% less ground mineral effect. If a person put both LF and DD together in the same coil that would be one dynamite combination for full ground coverage while hunting sliver and copper coins in high iron mineralization!

Digger uses the 9" LF CC for farms and homesteads. That's why I would like to see a very lightweight elliptical 10x18" LF coil for 'coin' hunting in larger farmers fields(homesteads) for the Minelab X-Terra's, but that may never happen, unless you are someone like Bill Gates or Bruce Candy and can make it happen.

So which 9" LF CC or 10.5" MF DD coil to use in high mineralization in North Carolina(NC) for (silver and copper)coins as you asked, and Digger answered you very well. IMO both coils with work as a toss up. But in the very highest of high mineralization the 10.5" MF DD is the best choice. Digger said in the past the 9" LF CC can idenfity iron trash better by an audio(sound) iron grunt. So if you are working in alot of iron trash that coil may be a better choice then.

Digger also said in the past that the 10.5" DD gets about 40% more depth than the 5x10" HF DD. Yes, that would be on about coin sized objects. But on very tiny-small subgram gold nuggets the 5x10" would get more depth. The 5x10" will also get better separation in trash though.

Which coil, the 5x10" or 6" HF DD you also asked? Digger answered this also, but the 6" has a more knife-blade(narrower) signal sent into the ground than the 5x10"(which is wider) according to nero_design(Marco). Thus the 6" has better trash separation, also being shorter in length. The disadvantage is the 6" has less ground coverage.