northwest interesting video re: coils
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australian electronic gold prospecting forum.com  |  Detector Technology and Electronics and new detectors  |  Detector Coils (Moderator: Goldman)  |  Topic: interesting video re: coils 0 Members and 2 Guests are viewing this topic. « previous next »
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Goldman
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« on: Wednesday May 15 2019 14:49:32 AEST PM »

Hi everyone,

Found this coil video, which I thought would be of general interest, especially towards the end.


  


Cheers
Goldman
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Dontbstme
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« Reply #1 on: Wednesday May 15 2019 15:32:03 AEST PM »

The claim that DD coils go deeper in mineralised soil is bogus and is based on IB detectors that work in permanent ground noise rejection (this would be 99.9% of all modern IB detectors).
In true All metal mode (Nexus, Fisher F75, XP Deus on program 10) the ground noise is not rejected and all coils are the same depth wise providing surface area and operating frequency are the same.
The true All Metal Mode is easy to recognise.
It is when the ground balance of the detector can go both positive and negative during adjustment and the near field of the search coil is audible, not suppressed.

I also have not found any evidence to suggest that concentric coils go deeper in non-mineralised soil than DD. Other companies would claim other wise too. I found them to have the same depth and with less reliable discrimination than DD when used on IB detectors.

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bugwhiskers
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« Reply #2 on: Friday May 17 2019 07:15:28 AEST AM »

It's very tempting to "risk" the money to try one.

  
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dasenator777
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« Reply #3 on: Friday May 17 2019 08:22:06 AEST AM »

  
It's very tempting to "risk" the money to try one.

  
i have one here bugs if you want to muck around with it, curiosity got the better of me as well, have a dd and a mono. if you want them il post over to ya bugs.  happy face
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bugwhiskers
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« Reply #4 on: Friday May 17 2019 08:36:36 AEST AM »

  
  
It's very tempting to "risk" the money to try one.

  
i have one here bugs if you want to muck around with it, curiosity got the better of me as well, have a dd and a mono. if you want them il post over to ya bugs.  happy face

You have one of these Chinese coils?
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dasenator777
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« Reply #5 on: Friday May 17 2019 11:25:32 AEST AM »

  
  
  
It's very tempting to "risk" the money to try one.

  
i have one here bugs if you want to muck around with it, curiosity got the better of me as well, have a dd and a mono. if you want them il post over to ya bugs.  happy face

You have one of these Chinese coils?                                                                                                                  i have an 11" commander mono, and the 11" dd coils here. they come from the first batch of gpx 5000 they were flogging off, which were just a vlf inside. so dunno if they will work with a pi detector, yours if you want them bugs.  thumbs up!
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bugwhiskers
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« Reply #6 on: Friday May 17 2019 11:59:46 AEST AM »

  
  
  
  
It's very tempting to "risk" the money to try one.

  
i have one here bugs if you want to muck around with it, curiosity got the better of me as well, have a dd and a mono. if you want them il post over to ya bugs.  happy face

You have one of these Chinese coils?                                                                                                                  i have an 11" commander mono, and the 11" dd coils here. they come from the first batch of gpx 5000 they were flogging off, which were just a vlf inside. so dunno if they will work with a pi detector, yours if you want them bugs.  thumbs up!
[/quote
  


  
  
  
It's very tempting to "risk" the money to try one.

  
i have one here bugs if you want to muck around with it, curiosity got the better of me as well, have a dd and a mono. if you want them il post over to ya bugs.  happy face

You have one of these Chinese coils?                                                                                                                  i have an 11" commander mono, and the 11" dd coils here. they come from the first batch of gpx 5000 they were flogging off, which were just a vlf inside. so dunno if they will work with a pi detector, yours if you want them bugs.  thumbs up!

Have you tried it on your QED?
If it is not suitable, the QED will just shut down immediately without any damage being done
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GARY
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« Reply #7 on: Friday May 17 2019 15:37:11 AEST PM »

  
The claim that DD coils go deeper in mineralised soil is bogus and is based on IB detectors that work in permanent ground noise rejection (this would be 99.9% of all modern IB detectors).

I also have not found any evidence to suggest that concentric coils go deeper in non-mineralised soil than DD. Other companies would claim other wise too. I found them to have the same depth and with less reliable discrimination than DD when used on IB detectors.


Goldman the diagram I posted in Dontbstme’s 30” CC for Minelab GPX,GP,SD and Similar thread is the same one in the Garett video. Also from what Dontbstme’s said in the same thread is the diagram is related to VLF and not PI.

However in the video Garett also display a DD coil that is used on their PI and it being used over the ground so I would assume their diagram does refer to PI detectors as well.

Therefore we will have to wait until Dontbstme uploads his video tests on this subject as he said “ I have compared 11"DD ML to my 11"CC test coil. The CC coil outperforms in all grounds the DD on every target. I will produce videos soon on the subject.”

Highly mineralised ground is going to be the deciding factor between the DD & CC.

Gary.
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dasenator777
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« Reply #8 on: Friday May 17 2019 21:48:21 AEST PM »

hey bugs i didnt try the mono, but have tried the dd, seems only half the coil is working, did not shut down machine though. i will throw on the mono in the morning and see what happens. sty tuned  happy face
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dasenator777
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« Reply #9 on: Saturday May 18 2019 17:17:42 AEST PM »

had a go at the mono this arvo bugs, it didnt shut down the qed, but was extremely noisy, couldnt shut it up. compared to my proper commander coil it falls short by way over half. the newer ones maybe better as apparently alot of the 4500 and 5000 are some sort of pi machine from stuff i have read recently. there even copying the 7000, the 2300, the atx , gold monster, and the exterra.   
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dasenator777
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« Reply #10 on: Saturday May 18 2019 17:19:37 AEST PM »

GPZ7000...   
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dasenator777
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« Reply #11 on: Saturday May 18 2019 17:21:52 AEST PM »

A big plus with the qed is its not being faked like the others so 2nd hand qed market is perfect for new buyers  excited
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bugwhiskers
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« Reply #12 on: Saturday May 18 2019 17:38:21 AEST PM »

The low price = low profit of the QED compared to others makes counterfeiting highly unlikely.
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Goldman
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« Reply #13 on: Saturday May 18 2019 17:43:02 AEST PM »

  
The low price = low profit of the QED compared to others makes counterfeiting highly unlikely.

It is the best value for money high performance PI detector in Australia and, well really anywhere.
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Goldman
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« Reply #14 on: Saturday May 18 2019 17:50:37 AEST PM »

  
A big plus with the qed is its not being faked like the others so 2nd hand qed market is perfect for new buyers  excited

But it does make you think. How many people are being dudded by all the hype/ fast talk on these web sites.

So based on 777’s experience, then always best to spend your hard earned on coils at reputable dealers, and within Australia.
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Dontbstme
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« Reply #15 on: Saturday May 18 2019 22:27:01 AEST PM »

  

However in the video Garett also display a DD coil that is used on their PI and it being used over the ground so I would assume their diagram does refer to PI detectors as well.


It doesn't refer to PI in any way. Garrett does not manufacture CC for PI detectors and no other company does or did either. Therefore comparison CC vs DD related to PI detectors does not exist yet.

For one to understand the CC vs DD comparison related purely to PI one needs to understand how these PI detectors work in the first place.

The work basics for DD and CC coils with PI have nothing in common with DD and CC on VLF.

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GARY
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« Reply #16 on: Saturday May 18 2019 23:17:20 AEST PM »

  

It is the best value for money high performance PI detector in Australia and, well really anywhere.


Absolutely agree with you Goldman in regards to the QED.

Gary.
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Dontbstme
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« Reply #17 on: Sunday May 19 2019 04:07:35 AEST AM »

  


It is the best value for money high performance PI detector in Australia and, well really anywhere.

In Australia may be. Elsewhere I wouldn't be so sure.
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bugwhiskers
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« Reply #18 on: Sunday May 19 2019 08:40:06 AEST AM »

  
  


It is the best value for money high performance PI detector in Australia and, well really anywhere.

In Australia may be. Elsewhere I wouldn't be so sure.

Can you actually name a brand that comes even close to the QED's performance over highly mineralised ground, ergonomics and price?
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dasenator777
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« Reply #19 on: Sunday May 19 2019 10:34:48 AEST AM »

  
  
  


It is the best value for money high performance PI detector in Australia and, well really anywhere.

In Australia may be. Elsewhere I wouldn't be so sure.

Can you actually name a brand that comes even close to the QED's performance over highly mineralised ground, ergonomics and price?
a qed pl1 lol  excited
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australian electronic gold prospecting forum.com  |  Detector Technology and Electronics and new detectors  |  Detector Coils (Moderator: Goldman)  |  Topic: interesting video re: coils « previous next »
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