northwest QED tips
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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  |  QED users  |  QED users (Moderator: bugwhiskers)  |  Topic: QED tips 0 Members and 1 Guest are viewing this topic. « previous next »
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« Reply #80 on: Wednesday July 10 2019 22:55:28 AEST PM »

Excellent thankyou.

Al.
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GARY
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« Reply #81 on: Thursday July 11 2019 09:43:04 AEST AM »

  
Thanks Goldman,

Its hard to know that people appreciate your input re tips when there isnt a means to show appreciation but we surely do, so please dont stop.

Cheers mate.

Al.

I could not agree with you more Al.

Goldman's ongoing contribution to the QED both here on this wed site and on the QED Facebook site is amazing to say the least as he continues to share his QED knowledge in words that are very easy for us all to grasp and understand.

Thank you Goldman.

Gary.
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Goldman
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« Reply #82 on: Saturday July 13 2019 17:47:28 AEST PM »

Here is the diagram in the manual that shows the relationship between THS-A and THS-B.

As you can see, the higher you go with THS-A, the smaller is the THS-B band that can be used.

Note that it assumes THS-B NULL is 50.



* C92A2CA0-D4EA-4ABA-BA56-B0809ACA0CE0.png (22.88 KB, 497x275 - viewed 191 times.)
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GARY
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« Reply #83 on: Saturday July 13 2019 18:28:06 AEST PM »

  

As you can see, the higher you go with THS-A, the smaller is the THS-B band that can be used.


Goldman as I view at your diagram for the THS-A setting then I would think 90 to be at the bottom and 30 at the top.

Gary.
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« Reply #84 on: Saturday July 13 2019 18:46:01 AEST PM »

  
  

As you can see, the higher you go with THS-A, the smaller is the THS-B band that can be used.


Goldman as I view at your diagram for the THS-A setting then I would think 90 to be at the bottom and 30 at the top.

Gary.

If you draw a line down from the 45 and from the 55 THS-B, the range is 10 at THS-A of 30, 5 either side of NULL. So as you go up to 90 THS-A, then the THS-B range is very small at the top.

Cheers Goldman
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« Reply #85 on: Saturday July 13 2019 19:11:23 AEST PM »

Have attached below my understanding of the diagram.

Gary.


* GarysTHS-B and THS-A Settings.jpg (36.31 KB, 494x278 - viewed 183 times.)
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« Reply #86 on: Saturday July 13 2019 19:44:03 AEST PM »

  
Have attached below my understanding of the diagram.

Gary.

Hi Gary,
Same interpretation.

Perhaps in the next version of the manual I could use your diagram and/or modify mine to remove the inner triangles as all I was trying to show was the THS-B band narrowing as THS-A increased and a single triangle shows that perfectly.

The next version of the manual is perhaps only a few months away. It will include the tips I have posted to date (if not already included) and more clarifications/descriptions.

Cheers Goldman

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« Reply #87 on: Saturday July 13 2019 21:09:11 AEST PM »

Maybe you could also add in regards to the somewhere on the diagram (smaller nuggets) & (larger nuggets) as in this case above Rising Pitch and Falling Pitch.

Gary.


* 2 GarysTHS-B and THS-A Settings.jpg (40.45 KB, 494x278 - viewed 182 times.)
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« Reply #88 on: Friday August 2 2019 12:39:09 AEST PM »

Further to my previous tip re: Ferrous targets with a long and narrow profile (eg. nails, wire, etc) will give a double tone when detected along their length.

So when you get a signal, always check it at 90 degrees to the original angle and if either one gives a double dip, walk away in confidence. I recommend you try it, dig a few just to gain your confidence in the process and you will find you can save yourself a lot of time in not digging some rubbish targets.

Worth noting that you will get a single tone when the nail is vertical.

The thinking is that when it is lying horizontally it couples one side of the coil to the other distorting the field and causing the wobble.

Cheers Goldman
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« Reply #89 on: Thursday August 8 2019 11:01:01 AEST AM »

QED Fuse
The QED fuse will blow
1. if the input voltage goes over 10 volts, and
2. if the battery polarity is reversed

I strongly advise that the batteries are not removed unless you need to change them. This prevents damaging the battery terminals, and also eliminates the possibility of putting them back in the wrong way around.

Cheers Goldman
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« Reply #90 on: Thursday August 8 2019 19:50:10 AEST PM »

Thanks for all your tips Goldman, I read, re-read and store them in a document for future reference.
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« Reply #91 on: Saturday August 10 2019 21:19:35 AEST PM »

QED and powerlines

One of the QEDs big advantages over other detectors is it’s ability to operate directly under single phase powerlines without interference.

The SMR (Synchronous Mains Rejection) default value of 107 has been designed to eliminate single phase 50 hz main signals. SMR is menu option 9.

If you do get some EMI under single phase power lines, then adjust SMR to null out 50hz mains EMI that is off frequency.

SMR can also be used to null out other sources of rhythmic EMI (e.g. microwave towers, 2 way radio transmissions, etc). So if you know you are in an area where these are a problem, then try adjusting SMR to see whether you can null the resulting EMI.

I have tested this myself (powerlines) on numerous occasions and I can tell you that this feature really works.

This feature is unique to the QED and is a feature that Howard designed into the QED from the very start of the design.

If you do adjust SMR, then don’t forget to reset it to the factory default setting (107) after you have finished detecting under/near the powerlines, otherwise you will find that your QED is noisy when next you are out detecting.

Cheers Goldman
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« Reply #92 on: Saturday August 10 2019 21:20:56 AEST PM »

QED factory Default Setting.
The factory default settings have been designed to put you in a ‘safe’ position if you get into difficulty (e.g. either messed the settings up or it’s very noisy for no reason), or
If you have on purpose set the QED up ‘on the edge’ using most of the settings available to push the limits and you want to quickly get back to some sort of standard for all settings.

The manual has a quick start guide (for beginners) that starts from the factory default position and suggests adjustment of only two settings:
1) THS-A up from default (30) until a threshold is heard, and
2) adjusting gain up from default (1) as high as is possible given the prevailing ground conditions and EMI.

You can successfully detect using factory presets, but I would at least do as the quick start guide suggests, with the addition of setting Mode appropriately and setting THS-B appropriately. Not forgetting the all important GB.

Cheers Goldman
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« Reply #93 on: Tuesday August 20 2019 22:42:14 AEST PM »

ground balancing with the upgrade

For those lucky QED owners with the latest upgrade, there are two methods to initially determine whether to go up in numbers or down to GB.

1) listen for the tone as you lower the coil to the ground and determine whether it is
* a high (rising) pitch, in which case you’ll need to go down in numbers, or
* a low (falling) pitch, in which case you’ll need to go up in numbers

2. use the AGB to determine which way it wants to go, up or down in numbers

Once you’ve got the direction, then very, very slowly bob the coil whilst depressing the appropriate (up or down) button.

You will notice that it will get quieter and quieter as you approach GB, at the quietest point release the button.

Bob the coil to check the GB and if needed incrementally adjust to get a perfect GB.

With practice you’ll find it becomes second nature.

Cheers Goldman
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« Reply #94 on: Wednesday September 11 2019 21:40:22 AEST PM »

Ground noise identification with the latest upgrade

For those with the upgrade, the +/- 4 method to determine whether your signal is a ground noise is still a valid process, HOWEVER, now instead of +/- 4, you really need to move the MGB about 20 either way. It’s the same principle with which way to go (up or down) as before.

In my testing, a ground noise signal will start to diminish after about 12 clicks, however will definitely diminish after 20 clicks, I now sometimes go +/- 30 just to be sure.

Cheers Goldman
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« Reply #95 on: Thursday September 12 2019 04:28:42 AEST AM »

  
ground balancing with the upgrade

1) listen for the tone as you lower the coil to the ground and determine whether it is
* a high (rising) pitch, in which case you’ll need to go down in numbers, or
* a low (falling) pitch, in which case you’ll need to go up in numbers

2. use the AGB to determine which way it wants to go, up or down in numbers

Once you’ve got the direction, then very, very slowly bob the coil whilst depressing the appropriate (up or down) button.

You will notice that it will get quieter and quieter as you approach GB, at the quietest point release the button.

Cheers Goldman

I think I'm confused, in my ground I never get a reaction from the ground when I slowly lower the coil to the ground from 12" or so which means I was never able to follow the youtube GB video.  It stays silent both directions, when I press AGB it does nothing.  I assume this is because the QED is already balanced in my ground, it must be neutral to it.   It's default GB of 150 I can lower to GB 1 and still raise and lower the coil with no ground feedback.  If I go up to 300 I start to get ground feedback going away from the ground.

So my question is, would I be better off running in Mode 11 (beach) and not worrying about ground balancing, or go back to my normal mode 1 and just leave the GB at 150 default or would I gain even better performance lowering the GB right down to 1?   With GB at 1 I did notice it reacted to hotrocks far more so I guess I could raise that number until they calm down.

Prior to the update I had to keep my GB numbers above about 45 or it reacted on the ground but anywhere between 45 and 160 seemed fine.   I just need to work out how to fine tune the GB to get the most out of it I guess.   Lots to learn  smile

This isn't a complaint in any way,I doubt anyone would complain not needing to GB, just trying to work out the best mode to operate in with my soils.
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« Reply #96 on: Thursday September 12 2019 09:55:19 AEST AM »

  
  
ground balancing with the upgrade

1) listen for the tone as you lower the coil to the ground and determine whether it is
* a high (rising) pitch, in which case you’ll need to go down in numbers, or
* a low (falling) pitch, in which case you’ll need to go up in numbers

2. use the AGB to determine which way it wants to go, up or down in numbers

Once you’ve got the direction, then very, very slowly bob the coil whilst depressing the appropriate (up or down) button.

You will notice that it will get quieter and quieter as you approach GB, at the quietest point release the button.

Cheers Goldman

I think I'm confused, in my ground I never get a reaction from the ground when I slowly lower the coil to the ground from 12" or so which means I was never able to follow the youtube GB video.  It stays silent both directions, when I press AGB it does nothing.  I assume this is because the QED is already balanced in my ground, it must be neutral to it.   It's default GB of 150 I can lower to GB 1 and still raise and lower the coil with no ground feedback.  If I go up to 300 I start to get ground feedback going away from the ground.

So my question is, would I be better off running in Mode 11 (beach) and not worrying about ground balancing, or go back to my normal mode 1 and just leave the GB at 150 default or would I gain even better performance lowering the GB right down to 1?   With GB at 1 I did notice it reacted to hotrocks far more so I guess I could raise that number until they calm down.

Prior to the update I had to keep my GB numbers above about 45 or it reacted on the ground but anywhere between 45 and 160 seemed fine.   I just need to work out how to fine tune the GB to get the most out of it I guess.   Lots to learn  smile

This isn't a complaint in any way,I doubt anyone would complain not needing to GB, just trying to work out the best mode to operate in with my soils.

G’day mate,

Well I’ve had a chat with Howard and together we believe that you would be better off running in beach mode given what you have written below. This would be for two main reasons:
1) you do get more depth in beach mode
2) in beach mode you do not have a detection hole, so therefore you will definitely not miss any gold. Not that the chance of missing gold in modes 1-10 is high as the detection hole with the latest upgrades has narrowed from the pre-upgrade model.

in beach mode,
1) all target responses will be rising pitch
2) you can and should still use the MGB to minimise any noise keeping MGB as low as possible. So best to start at MGB=150, then keep reducing until you get unwanted noise, then go up until quiet. If no noise at all, run at MGB=1.

Hope this helps,
Cheers Goldman
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« Reply #97 on: Thursday September 12 2019 11:57:47 AEST AM »

Brilliant, thanks Goldman and Howard for the advice. I tested again today in another area and had the same result, I was able to run in Mode 11 with no ground noise when pumping the coil.  I had my GB set at 1 in both locations as I wasn't sure if that even did anything in Mode 11 but I'll take your advice and start at default 150 and work my way down if necessary but I suspect I may get away with it on 1.  I do like this new firmware
  happy face
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« Reply #98 on: Thursday September 19 2019 10:25:24 AEST AM »

Hi everyone,

I want to keep this topic to just QED Tips, to that end I have split the latest non tip related posts to another thread entitled “QED vs 4500”.

I will also move other non tip posts out to new threads.

Please only use this thread for true QED Tip related posts as I want this thread to be THE repository for QED Tips, a thread people can refer to without wading through non tip related subject matter.

Yours in everything QED,

Cheers Goldman

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« Reply #99 on: Saturday September 21 2019 14:58:26 AEST PM »

beach mode
Not a great deal has been said about beach mode (mode 16 pre-update; 11 post update), so I offer the following advice:

Even though beach mode has no ground balance, the MGB still works but in a more internally simplistic manner, so can be used to quieten the QED as follows:

So in sand:

start at MGB of 150, then

* Wet sand: increase MGB from default until quiet

* Dry sand: decrease MGB from default until quiet

If any other users have used the QED on sand or at the beach, then please add your tips here so that others can benefit from your experience.

Thanks Goldman

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