Gold Detecting and Prospecting Forum
Would you like to react to this message? Create an account in a few clicks or log in to continue.

NFA elliptical coils

Go down

NFA elliptical coils Empty NFA elliptical coils

Post  goldquest on Sat Apr 07, 2012 8:21 pm

Happy Easter everybody, now I have a question, ( for some people in this forum it will be a silly question ) Embarassed, which part of the elliptical coil is the most sensitive part, front/back, middle or sides? because when I get a signal I don't know which part of the coil is on top of the target.
Any help will be welcome.
Cheers
goldquest
goldquest
Contributor Plus
Contributor Plus

Number of posts : 623
Age : 74
Registration date : 2011-04-27

Back to top Go down

NFA elliptical coils Empty Re-nfa-elliptical-coils

Post  Guest on Sat Apr 07, 2012 9:16 pm

Gday Goldquest happy Easter to you too, no question is silly, with mono coils the entire edge of the coil is very sensitive to shallow targets, if you pick up a deep target then the coil will pick it up in the centre as the signal from the coil is shaped like a cone "v" like this, hope this helps. DD are a different thing again. Very Happy

Cheers.

Mike. cheers

Guest
Guest


Back to top Go down

NFA elliptical coils Empty Re: NFA elliptical coils

Post  deutran on Sat Apr 07, 2012 9:21 pm

Hi Goldquest
Most people I've seen using these like the tip especially for finding the target in the hole,the 7 and 11 oclock positions are also sensitive if your R/handed depending on how you find your target.I,ve found the 17" a lot harder than the 14" because it has a very broad field particularly if the targets in the hole.
deutran
deutran
Contributor Plus
Contributor Plus

Number of posts : 1725
Age : 56
Registration date : 2009-09-26

Back to top Go down

NFA elliptical coils Empty Re: NFA elliptical coils

Post  rc62burke on Sat Apr 07, 2012 9:57 pm

Hi Goldquest
The most sensitive area's on an elliptical coil are the front & back or the toe & heel of the coil due to the tighter radius of the windings.
I find the easiest way to pin point a target is to step back about a foot once you get a signal, then swing and move the coil forward nice & steady until you get a signal, this will put the target at the front of your coil, then move 90 deg to the signal & repeat the proccess, I have no problem pin pointing like this with my 20" NF mono, hope this helps.
Lee
rc62burke
rc62burke
Contributor Plus
Contributor Plus

Number of posts : 2084
Age : 47
Registration date : 2009-03-05

Back to top Go down

NFA elliptical coils Empty NFA elliptical coils

Post  goldquest on Sat Apr 07, 2012 10:10 pm

Thank you guys, it is all I need to know, I will try next time out. Very Happy
Cheers
Goldquest
goldquest
goldquest
Contributor Plus
Contributor Plus

Number of posts : 623
Age : 74
Registration date : 2011-04-27

Back to top Go down

Back to top


 
Permissions in this forum:
You cannot reply to topics in this forum