Simple Test 17 Inch X Coil Concentric With Vid

[araratgold]

Righto guys,

Just did a quick, simple test of the 17 spiral and 17 concentric, mainly curious to see how the new concentric would run.
Nothing scientific, just the 2 coils running over the same ground to show differences.

Settings were not changed, other than between normal and difficult.
Bear in mind I was on the edge of Kambalda, near Red Hill lookout which has several towers and electrical infrastructure on it, and we have just had 3 inches of rain, so ground is very damp.

Sensitivity 16, threshold level 21 and tone 37, semi auto, high yield only, audio smoothing OFF.

Concentric was much sharper on the small 0.3g ball of gold, really noticeable in difficult.
Concentric will need much closer overlap of swings when cleaning up a patch, but I have no doubt it will punch deeper and have better sensitivity to small stuff than the 17 spiral ( which is pretty good anyway ) . IMHO, it will be no good for patch hunting, but great for cleaning up a patch.

Neither coil suffered from EMI, considering how close I was to the aforementioned electrical equipment. Concentric balanced over the ferrite, although as stated numerous times before, I don't use the damn thing !

Overall impressions ? Top rate finish on the coil and new coil cable is spot on.
No heavier than the standard GPZ14. No emi problems. Runs beautifully, no bump sensitivity and more sensitive to small gold than the 17 spiral, which is already very good.
Elnur, you have outdone yourself comrade !

Full disclosure, I was gifted this coil to try out for being a loyal customer.

 

[jrbeatty]

Dammit Rick! Got my gold fever pumping now!

Hot wet Kambalda ground and running fine. That ground makes the worst Victoria has to offer child's play.

My 20" Z CC is now ready for dispatch from Russia, can't wait!

 

[Norvic]

Aye Ricks got this NQer wishing our much needed wet would rack off, I too have a 17" concentric kindly gifted by X coil with no strings attached.

[mn90403]

1 hour ago, Norvic said:

Aye Ricks got this NQer wishing our much needed wet would rack off, I too have a 17" concentric kindly gifted by X coil with no strings attached.

Is there room in the Troopy?

[Jonathan Porter]

Rick did you try coupling the coil flat to the ground and lifting away to see if it was saturating? The coil seemed to be very stable even in Normal.

JP

[araratgold]

2 hours ago, Jonathan Porter said:

Rick did you try coupling the coil flat to the ground and lifting away to see if it was saturating? The coil seemed to be very stable even in Normal.

JP

You mean like at 3:30 in the vid ?

Coil was VERY stable JP, especially considering sensitivity of 16, no smoothing, damp ground and not far from the Red Hill Lookout.

 

[Jonathan Porter]

I’ve not had a chance to look at the whole vid, I’ll check it out later tonight. Yes it’s seem really nice and stable. 😃

[goldenoldie]

I recall viewing a in-ground depth test video of the Nexus 21" CC coil up against the NF 25" XDD, although on a GPX series detector, the 25" XDD produced the best result overall.

Maybe a larger DOD coil on the GPZ would do the same to a CC coil, although maybe not the 19" DOD, that was produced for the GPZ, going by all reports for this particular coil.

[mn90403]

I've seen a video and pictures of the 15 CC and a couple of 3 gram nuggets have been found out on the flogged patches!  It looks like this 17 CC is going to do it for a few others.