QED Information

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Re: QED Information

Post  Jarrodt6 on Tue Oct 03, 2017 8:10 pm

Been a while and I'm still swinging my QED, having young kids doesn't allow me to get out much. I'm up to about 10 pieces for 4 grams, not a huge amount but happy enough since I only get out once or twice a month.
One major improvement was the sennhieser rs160 headphones, the extra volume and not ripping out the cord when you're digging is night and day better, worth every cent.
I still fiddle with the settings every time I go out but that's more out of interest than anything else. At the moment if the ground allows I'm running the volume really high at around 70-80 and you almost get a solid threshold and hear every little noise, you have to keep the bias neutral to do this but my tests have proved I get better depth this way than a low bias/low mode approach.
I did recently run into the first ground that seemed too noisy for mine, shallow surfacing with a lot of clay. I've done other areas like this fine but this place had me getting false signals every few meters, I'm putting it down to the 11" elite being super sensitive and I'm looking at getting a bigger coil like the 14" because I'm not really after sub .1g that the 11" can find and it should run smoother.

In my opinion looking on other forums about the QED too much attention is given to the modes and the bias, I pretty much run mine in mode 8 and use the other settings to get the sensitivity. People say they get better tests in mode 1 than in mode 8etc, but mode 8 runs much quieter so now you can up your gain and up your volume like you can't in mode 1. Of course if you leave mode 8 with gain at 1 it will lose sensitivity.
Right now I run mode 8, gain 4-5, bias neutral and volume 70-80. If it's a bit noisy I bring the volume down first to as low as 30, then the gain. If it's runs really quiet I up the gain to 6, if it can handle more I go down to mode 7, then 6 etc but I never run my gain under 3, I see too many running low modes with gain under 3 and I don't think this is good, get the gain up higher in a higher mode, I get less ground noise this way.

Recently while having a break we set up a couple of tests with a .2 and 1 gram while stopping for lunch. The other detectors were a gpx 4500 with older 11" coiltek mono and a gpx4000 with 14" elite. I was happy that I could match both on the 1 gram and they both agreed I had the edge on the .2 over the 4500, no doubt the elite coil vs terracotta helped.
The difference we noticed was that the QED's signal is much easier to hear but it drops off quickly as it reaches its max depth while the minelabs gently faded into the slight woo-hoo.

I still didn't feel I had the best detector but it was certainly close, and for half the price, much less weight, no cables and the satisfaction I put it all together myself how I wanted I was happy.
The only time it fell behind was with my super sensitive 11" on the clay surfacing it struggled with false targets while the older 4000 with the 14" went along well and found a couple of nice gram+ bits with less fuss. In other ground i have found small gold that this 4000 missed.



Last edited by Jarrodt6 on Wed Oct 04, 2017 12:32 pm; edited 1 time in total

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Re: QED Information

Post  adrian ss on Wed Oct 04, 2017 7:44 am

Good report and very interesting.
From your report The QED seems to have a place in the grand scheme of things that is somewhere between good and excellent value as a gold finder.
Still sounds a bit fiddly to set up but worth the effort to get it right.
Have you noticed any temperature related tuning drift?
I have not had to contend with ground and hot rock noise from my fav detectors for quite a while now..........Probably due to the fact that I don't get out much these days. Rolling Eyes Q24
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Re: QED Information

Post  petere on Wed Oct 04, 2017 10:56 am

Thank you for that informative post jarrod.
I haven't had the opportunity to use my QED much but think I am starting to get the hang of it.
Will take your comments on board about mode and gain and see how I go.
I have the 14x9 advantage coil which is probably not as sensitive as the flat wound types so would expect settings to be a bit different.
Will be in Laanecoorie on the w/end so expect to get a few more hours under my belt then.
Cheers
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Re: QED Information

Post  Jarrodt6 on Wed Oct 04, 2017 12:26 pm

It can sound fiddly until you remember most other machines have a ton of settings too, basic settings are easy but it's chasing that last 10% that would take some learning.

The only time I have noticed the bias drift is on a very cold morning it might climb a couple in the first 10 mins at worst, it's totally not an issue for me. It doesn't hurt to check your bias range every now and then and would only take a few seconds anyway.
It has place but I'm not sure they should keep acting like its the perfect detector for everyone and play on its strengths instead. For me I like to explore and it's so light inc a battery that will last all day, I have no harness or cords so I can go into a dry creek and place the detector up on the steep bank and pull myself up, that's just one example but it makes a difference.

With finding settings I'd say take everything on board but do some tests and stick with your own results. Test things like mode 3 might allow low bias and a gain of 3-4, but mode 8 will allow gain at 6 and bias 3 digits below neutral and you might the same test results but I like mode 8 because I can adjust other settings more before ground noise, you have more to play with and fine tune.
So if someone was starting out I'd say put it in mode 8 and forget the modes until you understand the rest. On the weekend I found a tiny piece of copper jacket off a bullet that seriously took me 10mins to find, I should have walked but I just had to know. And that was in mode 8 so it's plenty sensitive enough after you turn up the other settings.


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Re: QED Information

Post  adrian ss on Sun Dec 17, 2017 8:14 pm

I see a QED on Ebay.
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Re: QED Information

Post  Jarrodt6 on Tue Dec 19, 2017 10:28 pm

It's not mine. There's a few out there now I guess.

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Re: QED Information

Post  adrian ss on Wed Dec 20, 2017 7:46 am

From what I have been led to believe, Quite a good number of QED's were purchased and to date I have only seen two up for sale. So if they were no good then now would be a good time to be trying to sell them.

It seems to me that the QED is a good gold finder for the price.
You don't need extra trappings hanging off it like signal boosters, harnesses, bungy supports or giant batteries or signal enhancer. It can use a lot of ML coils.
and it can be set up for whatever type / size gold that you want to find plus it will work in most ground conditions except for possibly extreme iron mineralised.....and even there it appears (from what I have read) to operate not so bad. The only troublesome bit is getting the hang of the set up procedures.
Yes it needs a bit of operator understanding........No I don't have  QED but have read a lot about it. It can not all be BS.

Look at the total crap that the Infinium had to negotiate before it was accepted as a pretty good machine that can find gold in the worst ground conditions imaginable and all the way to 200 foot down on the ocean floor. It has been superseded but still holds its place in the grand scheme of things as a great tecta...Well mine is anyway so there! Minelab has yet to produce such a hand held machine.
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Re: QED Information

Post  Jarrodt6 on Wed Dec 20, 2017 11:07 am

In short you're pretty much right, except the setup is easy, much easier than a gpx etc. The only issue is it's depth on mid sized targets.
Mine never had an issue with ground balance.
I now have a gpx and it is superior on performance but it does feel horrible in summer with all the stuff hanging off me.
I've seen 4 for sale, most are on gumtree. I had no trouble selling mine after I did a demo with some small gold.

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Re: QED Information

Post  adrian ss on Thu Feb 08, 2018 8:41 am

rockhunter62 wrote:Please excuse my ignorance folks but can someone tell me what QED stands for?

cheers

Doug

QED
Quantum Electro Dynamics.......Ask Steven Hawkins. That is what he will tell you and he knows everything about everything.
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