northwest 30" CC for Minelab GPX, GP, SD and similar.
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link-https://www.facebook.com/groups/245308699667153/403446933853328/?comment_id=403472030517485&reply_comment_id=403476793850342&notif_id=1562580344994993&notif_t=group_comment
Interfacion Pty Ltd is pleased to announce that the QED PI Detector has been modified to allow the use of DD (double D) coils. This change involves a simple change to the electronics within the control box.
The firmware has also been upgraded to include a further improved Ground Balance.
All detectors being delivered to new customers from Monday 5th August 2019 will already have the above upgrades included.
As a show of commitment to all QED owners, the hardware modification to allow use of the DD and CC coils will be provided at no cost.
Of course and as per the QED warranty, the firmware update is provided free of charge, except for P&H.
Any QED owner who plans to attend the Laanecoorie Bash is encouraged to bring their detector along and have it upgraded at no cost.
Standard postage and handling arrangements apply to other owners. Send via Australia Post the box (minus batteries) along with a pre-paid, pre-addressed bag/box to:
Interfacion Pty Ltd
PO Box 106R
Redan VIC 3350
Howard Rockey
Director Interfacion Pty Ltd.

australian electronic gold prospecting forum.com  |  Detector Technology and Electronics and new detectors  |  Detector Coils (Moderator: Goldman)  |  Topic: 30" CC for Minelab GPX, GP, SD and similar. 0 Members and 1 Guest are viewing this topic. « previous next »
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Author Topic: 30" CC for Minelab GPX, GP, SD and similar.  (Read 5163 times)
Dontbstme
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« Reply #60 on: Wednesday March 20 2019 04:54:06 AEDT AM »

Discrimination test of GPX 4500 with Nexus 30"CC.

  
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mylab
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« Reply #61 on: Thursday March 21 2019 00:06:37 AEDT AM »

Well done to you Dontbstme on your video tests with your 30” CC coil on a GPX 4500.

Also for the way you performed your tests displaying each setting to the video camera that is to be used for a particular test. You were genuine in the way you presented your test results using different targets of size and composition both for the air tests and buried in the ground tests, as well the buried in mineralised ground tests.

The only other testing left for your CC coils is how well they would operate on and through mineralised ground in Australia.
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Dontbstme
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« Reply #62 on: Thursday March 21 2019 03:02:20 AEDT AM »

  
Well done to you Dontbstme on your video tests with your 30” CC coil on a GPX 4500.

Also for the way you performed your tests displaying each setting to the video camera that is to be used for a particular test. You were genuine in the way you presented your test results using different targets of size and composition both for the air tests and buried in the ground tests, as well the buried in mineralised ground tests.

The only other testing left for your CC coils is how well they would operate on and through mineralised ground in Australia.


Thank you mylab.

The coil was sent today to Australia and should arrive on Tuesday next week. By the end of next week I hope to have some preliminary reports.
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Dontbstme
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« Reply #63 on: Monday March 25 2019 19:40:44 AEDT PM »

The 30"CC has arrived in Oz today. Tomorrow I will have some first time testing done.
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bugwhiskers
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« Reply #64 on: Monday March 25 2019 20:26:05 AEDT PM »

  
Brave 1m digger. Seems coil work stable. Congratulation.

Here we are back to the main problems of deep diggers.
Namely how to distinguish between Gold nugget and tin can (or other crap)
at 1m of depth - to not to dig ten 1m holes per day in vain.

Indeed, you want to dig in a vein, not in vain.
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Dontbstme
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« Reply #65 on: Monday March 25 2019 20:51:19 AEDT PM »

  
  
Brave 1m digger. Seems coil work stable. Congratulation.

Here we are back to the main problems of deep diggers.
Namely how to distinguish between Gold nugget and tin can (or other crap)
at 1m of depth - to not to dig ten 1m holes per day in vain.

Indeed, you want to dig in a vein, not in vain.

Well this could be a new beginning.

  
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mylab
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« Reply #66 on: Tuesday March 26 2019 00:44:03 AEDT AM »

  

The 30"CC has arrived in Oz today. Tomorrow I will have some first time testing done.


Dontbstme you certainly have taken up the challenge to see if your 30” CC coil can handle the ground down under in Australia.

As for digging 1 metre holes for trash I wonder how many operators have dug to that depth for a piece of iron in hard goldfield ground. Surely if you are an experienced operator you know once you start digging you have good idea that the ground is natural and untouched so the target at the end of the dig is going to be gold, well that is my view. 

I was interested on how the 30” CC coil was able to discriminate out the iron objects in the video tests however to what depth if those objects were in the ground, although iron buried out in natural goldfield ground I believe would not be at depths of 1 metre. I suppose the exception would be in a creek situation where ground is being moved to build depth over a piece of iron.
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Dontbstme
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« Reply #67 on: Tuesday March 26 2019 02:15:40 AEDT AM »

  
  

The 30"CC has arrived in Oz today. Tomorrow I will have some first time testing done.


Dontbstme you certainly have taken up the challenge to see if your 30” CC coil can handle the ground down under in Australia.

As for digging 1 metre holes for trash I wonder how many operators have dug to that depth for a piece of iron in hard goldfield ground. Surely if you are an experienced operator you know once you start digging you have good idea that the ground is natural and untouched so the target at the end of the dig is going to be gold, well that is my view. 

I was interested on how the 30” CC coil was able to discriminate out the iron objects in the video tests however to what depth if those objects were in the ground, although iron buried out in natural goldfield ground I believe would not be at depths of 1 metre. I suppose the exception would be in a creek situation where ground is being moved to build depth over a piece of iron.


The concern regarding deep Iron involves the old timer sites in Oz, which at the most part are a mess of trash.

I did not have the time to go out and dig real targets to check how deep the Iron can be rejected with the GPX, but for sure the level 10 of IR and pure untouched non-ferrous deep signals in the ground is a hell impressive result to see as no IB detector is able to show such discrimination on my test site. My detectors will beat for sure any other IB on deep discrimination, but the GPX definitely caught me off guard with my own coil.
The coin I use on the video is 20.5 mm, but the one in the ground is 18mm, not 20.5. I just did not have the same small coin to use in the video. So in full IR the GPX with the 30"CC blasted an 18mm coins at over 20", 12" of which are under ground. I have not seen anything to come close to this display.

I am going to construct 11'5" CC (by the end of next week) for the GPX with the special purpose to explore how well the discrimination of this detector will go with the CC's in depth. I will also build a 20"DD again to see how the discrimination will work and if there will be any difference between DD and CC discrimination with the GPX.
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jrbeatty
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« Reply #68 on: Tuesday March 26 2019 08:53:38 AEDT AM »

Dontbstme:  Watching this thread with considerable interest.

 good luck with your Aussie tests.

Quote from: Bugs
Indeed, you want to dig in a vein, not in vain.

Very droll, Howard.  smile
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WM6
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« Reply #69 on: Tuesday March 26 2019 10:27:16 AEDT AM »

  
Dontbstme:  Watching this thread with considerable interest.

 good luck with your Aussie tests.

Quote from: Bugs
Indeed, you want to dig in a vein, not in vain.

Very droll, Howard.  smile

Actually i mean "in vain" or all day futile dig of about 10 holes at 1m of depth..
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GARY
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« Reply #70 on: Tuesday March 26 2019 10:53:17 AEDT AM »

  

 I will also build a 20"DD again to see how the discrimination will work and if there will be any difference between DD and CC discrimination with the GPX.


I wonder since NF is to release a 25"DD then to what depths it may discriminate too on a GPX. 

Also how the 25"DD would stack up against the 30"CC to cope with Oz ground in the deepest Soil / Timing and for an outright in-ground depth test comparison.

Gary.
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« Reply #71 on: Tuesday March 26 2019 10:57:00 AEDT AM »

  

Well this could be a new beginning.


Thanks for interesting test.

What about stacked buried different targets?

Par example: gold nugget/coin buried at 50cm of depth under (in vertical line) iron wedge buried at 20cm?
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Dontbstme
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« Reply #72 on: Tuesday March 26 2019 16:30:37 AEDT PM »

  
  

Well this could be a new beginning.


Thanks for interesting test.

What about stacked buried different targets?

Par example: gold nugget/coin buried at 50cm of depth under (in vertical line) iron wedge buried at 20cm?

GPX exhibits excellent discrimination, but it has a slow recovery speed. It will never find anything under Iron no matter the coil configuration or coil attached. This kind of discrimination is a treat that only Nexus MP can offer with its Silver Scout coil, but not at depth of 50 cm for a coin.
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Dontbstme
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« Reply #73 on: Tuesday March 26 2019 16:31:50 AEDT PM »

  
  

 I will also build a 20"DD again to see how the discrimination will work and if there will be any difference between DD and CC discrimination with the GPX.


I wonder since NF is to release a 25"DD then to what depths it may discriminate too on a GPX. 

Also how the 25"DD would stack up against the 30"CC to cope with Oz ground in the deepest Soil / Timing and for an outright in-ground depth test comparison.

Gary.

I am going to build a 20"DD from Carbon Fiber and compare the discrimination to the CC.
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sd220d Digger
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« Reply #74 on: Tuesday March 26 2019 19:56:58 AEDT PM »

  
  
  

Well this could be a new beginning.


Thanks for interesting test.

What about stacked buried different targets?

Par example: gold nugget/coin buried at 50cm of depth under (in vertical line) iron wedge buried at 20cm?

GPX exhibits excellent discrimination, but it has a slow recovery speed. It will never find anything under Iron no matter the coil configuration or coil attached. This kind of discrimination is a treat that only Nexus MP can offer with its Silver Scout coil, but not at depth of 50 cm for a coin.

Who is your tester of this 30" coil of yours Alie?

So you are saying your 30" coil is not any good for gold detecting? ( huge gold nuggets @ 1.5 - 2  metres)
And does that mean your price tag of $4800 for this coil is not worth the huge amount of money that only rich people can afford?
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sd220d Digger
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« Reply #75 on: Tuesday March 26 2019 21:13:54 AEDT PM »


Herman, comment withdrawn due to your no reply.

Gullible people will always get SUCKED in to outrageous claims with no results.




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Dontbstme
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« Reply #76 on: Wednesday March 27 2019 05:26:51 AEDT AM »

The coil works in Oz on mineral level 7 out of 10 according to tester estimate.
The first test on GPX5000 was a bit misleading as the 5000 does not seem to cope well with this coil, but older 4500 model does. Mine is 4500 from 2011 and it works perfect. I will wait for next more detailed tests with older 4500 to see what come out of it.
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Dontbstme
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« Reply #77 on: Wednesday March 27 2019 05:37:46 AEDT AM »

There are new results to come. So the first test I will consider irrelevant for now.
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Reg Wilson
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« Reply #78 on: Wednesday March 27 2019 09:19:45 AEDT AM »

What about your coil on QED. I think most people on this forum are more interested in how it performs, or if it performs on QED. The weight situation is also of more interest with this combination.
You come on this forum flogging your large but expensive coil, and ignore the QED. Not so clever.
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GARY
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« Reply #79 on: Wednesday March 27 2019 09:49:26 AEDT AM »

Since a DD coil does not operate well on the QED then it appears a CC coil is similar in the way it operates?

Gary.
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australian electronic gold prospecting forum.com  |  Detector Technology and Electronics and new detectors  |  Detector Coils (Moderator: Goldman)  |  Topic: 30" CC for Minelab GPX, GP, SD and similar. « previous next »
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