northwest Q factor f1a4
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Some software and hardware updates now available for the QED.More  QED firmware updates (inc Auto GB  option) just announced here. New  QED hardware updates/options and pictures will be posted  first here  as they become available.

Another satisfied QED user! QED user report for 9 days detecting! User loves it, found it easy to use,found gold with it and he prefers it to his 5000! Also a report on a QED used at the beach for coin shooting.QED users reporting in with their multi ounce gold finds with the QED!
From  another QED user today:"Been out and about today testing and comparing against other machines etc in ground that has been horrible in the past.Bround balancing Ive found very simple and easy.'m using the Nokia booster but need a little more sound/threshold.Otherwise no complaints from me, very impressed."
and :"My QED with the 8” commander on it, out performed my SDC Got bits that don't register on my scales SDC has since been sold"
"My QED is terrific. Lightweight, very sensitive and screams at me when it hits any target. The Detect shaft and the 11" ultra sensing coil is a top quality fitout. I attached an external speaker which added under 200gms of weight in total and still remains very well balanced so i never feel fatigued after many hours of swinging."

Stinky  Pete :http://www.detech-metaldetectorsaustralia.com.au/  and Goldsearch Dunolly are the  Australian distributors for the QED.
This is the only forum where you can talk directly with the designer/ manufacturer of the QED and  also some very experienced QED users.
Jrbeatty and Reg Wilson  and  Yellowfin  (or Doug here for that matter!)have NO vested  or pecuniary interests(or secret deals or cash for comment or any other undisclosed benefits )in the QED other than using it to find gold which it is doing very successfully! The ONLY people deriving  an income from the QED(other than finding good gold) are the 2 approved retailers and Bugwhiskers! The ONLY investor in the QED is Bugwhiskers!
I have never met Jrbeatty or Reg Wilson at Howards house or ANY other location!

australian electronic gold prospecting forum.com  |  Detector Technology and Electronics and new detectors  |  Detector Coils  |  Topic: Q factor f1a4 0 Members and 1 Guest are viewing this topic. « previous next »
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Alex
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« on: Thursday April 14 2016 22:06:41 AEST PM »

Helo being new to this hobby i purchaced a minelab f1a4 mod 2 (Jack Lange). The 8 inch coil is fine but lacks ground coverage so i was looking at larger coils .After reading excellant posts from Stefan and I.B.Gold I've decided to try to make a 11 or 14 inch. I think the f1a4 is basically a sd 2000 .If so does this mean the coil neads a high Q like the sd2000
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Doug
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« Reply #1 on: Saturday April 16 2016 10:59:54 AEST AM »

  
Helo being new to this hobby i purchaced a minelab f1a4 mod 2 (Jack Lange). The 8 inch coil is fine but lacks ground coverage so i was looking at larger coils .After reading excellant posts from Stefan and I.B.Gold I've decided to try to make a 11 or 14 inch. I think the f1a4 is basically a sd 2000 .If so does this mean the coil neads a high Q like the sd2000

I don't know but  "mechanic" on this forum i think would know.
doug smile
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All posts on this forum are the personal views of the author and should  not necessarily be  interpreted as those of Admin The QED contains NO patented or protected IP!!! No fake users on this site! This forum does not depend on  guest posting liars to survive!1/2 wit powerless to login and post! LO
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« Reply #2 on: Saturday April 16 2016 13:42:26 AEST PM »

Hi Alex,

I don't know about the Q factor, but I do know they like coils that settle fast. Other than that the specs are the same as the normal range of minelab coils. Just keep the capacitance down as much as possible.
Those new nugget finder coils work extremely well and fit the bill 100% for the f1.

I would recommend using a scope to look at the output of the front end and compare it to the earliest sample and make sure the coil has settled back to ground before the first sample begins.

Cheers Mick
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Alex
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« Reply #3 on: Saturday April 16 2016 15:42:51 AEST PM »

Thanks Mick
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Alex
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« Reply #4 on: Saturday April 16 2016 16:50:16 AEST PM »

Doug what do you think of this lcr for a basic start or have you a better suggestion    
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Doug
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« Reply #5 on: Saturday April 16 2016 18:28:42 AEST PM »

  
Doug what do you think of this lcr for a basic start or have you a better suggestion    

I don't think I am competent enough to give an opinion on this.Hopefully some others may chip in.
doug smile
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All posts on this forum are the personal views of the author and should  not necessarily be  interpreted as those of Admin The QED contains NO patented or protected IP!!! No fake users on this site! This forum does not depend on  guest posting liars to survive!1/2 wit powerless to login and post! LO
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« Reply #6 on: Saturday April 16 2016 19:26:59 AEST PM »

HI Alex,

I have one of those or a very similar one and when measuring inductance it is way off.

I would be inclined to get a more commercial unit. Try Jaycar. You will pay more, but you'll only need to spend it once.

Cheers Mick
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Alex
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« Reply #7 on: Saturday April 16 2016 20:55:54 AEST PM »

Thanks again Mick
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WM6
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« Reply #8 on: Saturday April 16 2016 22:11:02 AEST PM »

Hi Alex

Tested a lot of different LCR meters.
Here you can find some test results:

  
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moodz
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« Reply #9 on: Saturday April 16 2016 22:39:20 AEST PM »

  

its all you need ... better than 1% accurate ... mine is anyway.
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moodz
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« Reply #10 on: Saturday April 16 2016 22:44:05 AEST PM »

...and a bettter one with the sourcecode :-)      

  
  

its all you need ... better than 1% accurate ... mine is anyway.
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pedro
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« Reply #11 on: Sunday April 17 2016 08:15:38 AEST AM »

I had a 14x9 NF coil on my F1A4 and as Mick says they work well, very sensitive. Be prepared to dig a lot of hot rocks. I also tried an old 18" Coiltek DD, but found that that was very difficult to ground balance. Bought a 11" ML DD and found that to be quieter than the NF but not as sensitive. Good luck with the coil build.
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Alex
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« Reply #12 on: Sunday April 17 2016 09:14:21 AEST AM »

Thankyou for all help everyone , hase given me lots to hink about
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gef12
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« Reply #13 on: Sunday April 17 2016 09:26:23 AEST AM »

someone didnt pay the Ham fees ....vk6fh - or something else  smile
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Maybe 2013 is the Year of the Nugget ... EFFEN hope so :-)
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australian electronic gold prospecting forum.com  |  Detector Technology and Electronics and new detectors  |  Detector Coils  |  Topic: Q factor f1a4 « previous next »
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