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#1

stevewilko
Member
From: West Of Melbourne, VIC
Joined: 17 October 2016
Posts: 129
Member
20 September 2019 12:26 pm

Hi,

We had a fun test of some detectors and coils whilst out last week.

Apologies about the link, I think this will work, I couldn't align the tables in this post - a word file became a nonsense in html, so I created a PDF to overcome this difficulty.

I am not a computer guru but it is surprising what you can do when you apply yourself and have a go!

I have 2 pictures that I cannot add as the file size is too big.
One is the depth of the hole - the other is a picture of the gold scratchings that came out with the camp out in beautiful weather, full moon and still.

Ahh the life! Anyway I hope it is a bit of fun and a little interesting for you all.

https://www.prospectingaustralia.com.au … esults.pdf

Last edited by stevewilko (20 September 2019 12:46 pm)


Thanking all contributors for their involvement and the quality of these posts. Prospecting with - GPX 4800 / 11" DD / 15 x 12 Mono / 15" DD / 18" NF Mono / NF 25"X DD

16 users like this post: diggit, Jaros, hermann, Lesgold, Stocky111, Ship of fools, Northeast, Aussiedigs, PhaseTech, Chewy, tim, Booney, goldtruck59, RM Outback, PJG, Deepseeker

#2

Deepseeker
Member
Joined: 13 August 2018
Posts: 718
Member
20 September 2019 02:57 pm

Great work stevewilko! I'm giving my NF 25" X DD its second run in GT ground tomorrow on the 5000. Thanks for your efforts and listing the results thumbsup


Try hard not to offend. Try even harder not to be offended.

1 user likes this post: stevewilko

#3

Dignit
Member
From: Melb Eastern Suburbs, VIC
Joined: 15 May 2015
Posts: 1,684
Member
20 September 2019 07:40 pm

Yes, great report Stevewilko.
Very interesting ?


GPX 4500, pick, Jeep Cherokee and gold fever

1 user likes this post: stevewilko

#4

stevewilko
Member
From: West Of Melbourne, VIC
Joined: 17 October 2016
Posts: 129
Member
21 September 2019 11:00 am

Hi, the lead sinker in the hole is here via the pdf link - and the gold referred to is in the picture below.

https://www.prospectingaustralia.com.au … n_hole.pdf

1569023881_bills_specs.jpg

Cheers stevewilko


Thanking all contributors for their involvement and the quality of these posts. Prospecting with - GPX 4800 / 11" DD / 15 x 12 Mono / 15" DD / 18" NF Mono / NF 25"X DD

12 users like this post: dam it, Northeast, PhaseTech, Mackka, Chewy, Booney, Retirement Stone, Ship of fools, RM Outback, goody2shoes, PJG, diggit

#5

PhaseTech
Phase Technical
From: Adelaide, SA
Joined: 29 May 2014
Posts: 1,939
Phase Technical
21 September 2019 03:28 pm

Good report and notes on the 25"! Thanks for taking the time to do that and type up results.


Agent for Minelab, Nugget Finder, Nokta & Makro, Quest, Detech, SteelPhase - Phase Technical Website

1 user likes this post: stevewilko

#6

tim
Member
Joined: 20 May 2019
Posts: 15
Member
22 September 2019 11:14 am

I like your use of the ball sinker - that should really help in reproducing the tests. Should be done more often!

stevewilko wrote:

Hi,

We had a fun test of some detectors and coils whilst out last week.
...
https://www.prospectingaustralia.com.au … esults.pdf

1 user likes this post: stevewilko

#7

Retirement Stone
Member
From: Newcastle, NSW
Joined: 26 November 2013
Posts: 870
Member
22 September 2019 02:51 pm

stevewilko, thanks for taking the time to conduct and compile the results.

Just reinforces all that we learn along the way. Different environmental conditions, different detectors, different settings, different coils and different operators explain why gold still shows up in flogged areas.

I m no expert but I suspect that a similar weighted or shaped piece of gold as opposed to the sinkers could be heard deeper because gold is far more conductive than lead. This is apparent when a tiny piece of gold screams on the coil as opposed to lead.

Awesome work. Thank you for sharing.

I have some new settings to try out!!!!

Cheers

RS


GPZ 7000, SDC 2300, Walbanker, Garrett pans, Determination and a touch of insanity mixed with Gold Fever!

1 user likes this post: stevewilko

#8

XLOOX
Member
From: Inglewood Fault, QLD
Joined: 21 August 2019
Posts: 13
Member
08 October 2019 04:52 pm

Hi Steve, Agree, using lead ball sinkers will be great for comparison testing for a few reasons -

1) cheap n easy to get hold of
2) easy to get a wide range of sizes
3) No issues with orientation unlike coins, nails etc.

I do have one question though - What do you mean by "Smooth Round Ball Sinker 25mm@ 28.6g" ?

I have a 25mm ball sinker and it is 95g. My 14mm ball sinker is 23g.

Can you confirm dia & weight of the one you used?

thanks


1985-2005 Garretts ADS Deepseeker - now THATS a slow learner !
2017- current Whites TDI SL +Sadie , TRX

#9

stevewilko
Member
From: West Of Melbourne, VIC
Joined: 17 October 2016
Posts: 129
Member
08 October 2019 05:25 pm

Hi xloox,
Rough rule of thumb in the bush!
25 mm diameter approximately not circumference, and read 28.6 gram on my scales.
It is the depth read by the detector and coil as a shared standard for comparison in a ' for fun test '
Cheers stevewilko.
p.s. I just re - read you have a 2.4cm round lead @ 3oz? hmmm

Last edited by stevewilko (08 October 2019 05:33 pm)


Thanking all contributors for their involvement and the quality of these posts. Prospecting with - GPX 4800 / 11" DD / 15 x 12 Mono / 15" DD / 18" NF Mono / NF 25"X DD

#10

XLOOX
Member
From: Inglewood Fault, QLD
Joined: 21 August 2019
Posts: 13
Member
08 October 2019 08:33 pm

Hi Steve, Yeah I was surprised how heavy the 25mm sinker was but I reweighed them on another set of scales & got same weights as per photos.

Def Pb not Pt smile

PS scales tared with the plastic vernier on them

1570526946_ball_sinker_14mm_23g.jpg
1570526946_ball_sinker_25mm_96g.jpg

Last edited by XLOOX (08 October 2019 08:34 pm)


1985-2005 Garretts ADS Deepseeker - now THATS a slow learner !
2017- current Whites TDI SL +Sadie , TRX


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