northwest QED tips
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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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Goldman
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« Reply #60 on: Monday June 3 2019 14:33:08 AEST PM »

  
  

2) in very mild to mild ground, for falling pitch (large) targets use the lowest GB number where the QED is still in GB. This will enhance detection distance for falling pitch targets.


Goldman in regards to your opening post and number 2) is there any tip for the GB number in mineralised ground to enhance detection distance for falling pitch targets?

Gary.

Hi Gary,

The same applies, I used an example in my first post where in less mineralised ground a perfect GB could be achieved anywhere between approx 85 and up to about 120, this difference I call the GB leeway. This was south of Ballarat using my 11” elite in mode 3.

In mineralised ground, the leeway will be small to very small, for example in an area in WA last year 1 MGB click either way of my GB was enough to be out of GB. In Maryborough, VIC the leeway may also be very small, exact, 1 or 2 depending on the area. If you do have a leeway, choose the lowest GB number where you are still in perfect GB.

In addition, when searching for falling pitch (large) targets, my testing has shown that best depth will be achieved when using:
A: greater than 55
B: as high above NULL as you can achieve on the day with the THS-A setting
G: start at 6
M: above 8

My best depth test results were achieved using A: 60; B: 6 above NULL; M: 12; G: as high as I could achieve without it being noisy.
Although using A: 70; B: 4 above NULL achieved almost the same depth.

I was unable to go higher than 70 with A when testing due to the unacceptable noise levels on the day.

My recommendation is to use A as high as you can get and yet still achieve B above NULL. For example,  A at 90 with B 1 above NULL is better than 90 and NULL, if that makes any sense. start with G at 6, and drop to no lower than say 4, if you need to go lower, raise mode, then adjust G back up

My testing also revealed that you lose very little in depth performance when using high Modes. One test revealed mode 8 had the best depth, a small loss above 8, with modes 12 to 15 being the same.

PM me if you want to discuss.

Cheers Goldman
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GARY
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« Reply #61 on: Monday June 3 2019 19:07:38 AEST PM »

Thanks Goldman and you have very clearly answered my question as the GB leeway was the key wording.

Also thank you for your test results and recommendations which I will utilise.

You have a good understanding on how to get the best from our QEDs.

Gary.
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Goldman
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« Reply #62 on: Thursday June 6 2019 09:29:25 AEST AM »

Auto Ground Balance (AGB)

A couple of things to remember when performing an AGB:
1. AGB works best when THS-B is at NULL

2. hold the coil approximately 15” above the ground, then whilst depressing the AGB Button, lower the coil towards the ground in a very fast motion

3. release the AGB Button at about 3” from the ground.

4. If needed after the AGB, perform a MGB to make incremental adjustments to achieve a perfect GB (i.e. when the tone has faded to a minimum.

Notes:
a. do not let the coil touch the ground during the AGB process as it may produce unexpected results.

b. it is most important to lower the coil towards the ground in a very fast motion.

c. the AGB works best when the current detector GB setting is far different from the current ground setting.

Cheers Goldman
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« Reply #63 on: Friday June 7 2019 11:49:18 AEST AM »

Checking/adjusting Ground Balance on the fly whilst detecting

An easy and fast way to check and adjust the ground balance on the fly is a worthwhile tool to have in your arsenal. Once you get used to it, it can save you a lot of time.

It is as simple as swinging the coil in an upwards direction at the end of your swing, like a pendulum, to check the GB. This is contrary to good detecting practice where for even/maximum detecting distance a full flat swing from side to side is essential.

So from time to time to check the GB while you are detecting, swing the coil up at the very end of your swing and take note of any pitch change:

1. If you are still in GB, the detector will remain quiet, so keep detecting
2. If you get a rising pitch, adjust the MGB up until the detector is back in GB
3. If you get a falling pitch, adjust the MGB down until the detector is back in GB

It’s worth noting that for this to work effectively and quickly for you, the QED should be in the MGB adjust setting whilst you are detecting. I always set it back to this position after adjusting anything so that I am ready to adjust the MGB while I am detecting. A quick way to do this is to momentarily push the AGB button - this sets the QED back to the MGB adjust setting from any setting.

The above ‘on the fly’ GB method is a quick and effective method to check/adjust the GB without stopping to perform the standard MGB process, which takes more time.

it’s also worth noting that the ‘on the fly’ MGB adjustment direction is the reverse of the standard MGB process, which is based on the pitch as you LOWER the coil to the ground.


Cheers Goldman
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GARY
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« Reply #64 on: Friday June 7 2019 12:19:03 AEST PM »

  

It’s worth noting that for this to work effectively and quickly for you, the QED should be in the MGB adjust setting whilst you are detecting. I always set it back to this position after adjusting anything so that I am ready to adjust the MGB while I am detecting. A quick way to do this is to momentarily push the AGB button - this sets the QED back to the MGB adjust setting from any setting.


it’s also worth noting that the ‘on the fly’ MGB adjustment direction is the reverse of the standard MGB process, which is based on the pitch, as you LOWER the coil to the ground.




Those 2 are definitely worth noting Goldman.

Actually a momentarily push of the AGB button which quickly resets the adjustment screen back to the MBG screen from any other screen setting is something I have forgotten to use so thanks for that tip.

Gary.
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Goldman
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« Reply #65 on: Sunday June 30 2019 15:08:41 AEST PM »

There are a number of things to check if your QED appears to be abnormally noisy:

1. check and clean your coil plug both on the coil side and the QED side. Any dust in either can cause unwanted noise.

2. Ensure that the coil plug is ‘done up tight’ so that no movement can occur within the plug.

3. Ensure that your batteries are clipped solidly into place as any movement can cause unwanted noise.

4. Check fuse security to ensure that the fuse is securely mounted.

Cheers Goldman
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GARY
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« Reply #66 on: Sunday June 30 2019 16:47:30 AEST PM »

And DO NOT do what I did yesterday and place one of the lithium batteries into the external battery holder the wrong way around which short circuited and damaged the external battery holder and thankfully it was not connected to the QED. 

Gary.
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« Reply #67 on: Sunday June 30 2019 16:51:00 AEST PM »

  
And DO NOT do what I did yesterday and place one of the lithium batteries into the external battery holder the wrong way around which short circuited and damaged the external battery holder and thankfully it was not connected to the QED. 

Gary.

Wow; how was it not connected to the QED, was it the external extender pack.
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« Reply #68 on: Sunday June 30 2019 17:18:22 AEST PM »

  

Wow; how was it not connected to the QED, was it the external extender pack.


Howard had sent me the external 4 battery holder before they were to be used as an external extender pack so I used a cheap version of Velcro to hold the extender pack onto the side of the QED control box for a test run out bush. Unfortunately the Velcro came loose so after I returned home I disconnected the external holder from the control Box and removed the 4 lithium batteries. So when I replaced them back in the pack I placed one in the pack the wrong way which short circuit the external holder.

I phoned Howard who explained what had happened to the external holder as I had thought I may have damage the other batteries which were in the the holder as well since my Multimeter was not reading any voltage from any of the 4 batteries. Howard thought I must have a problem with the Multimeter which as it turned out he was correct. Once I replaced the battery in the Multimeter it was fine and thankfully all 4 lithium batteries were fine also.

Gary.
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sd220d Digger
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« Reply #69 on: Monday July 1 2019 14:48:45 AEST PM »

  
link-http://www.qedmetaldetectors.com.au/dealers
Just saw this new website.
Well done Howard.

Reg is going to need to freshen up his web pages with the QED's abilities and gold finds.
Good to see.

Cheers boys  drinking red wine
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Blip
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« Reply #70 on: Monday July 1 2019 18:28:23 AEST PM »

Yeah pro level to suit the detector.

Just that i struggle with the ‘About us’!

And Reg sitting there with that moustache! Magnum eat your heart out!
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« Reply #71 on: Monday July 1 2019 18:35:44 AEST PM »

Reg certainly has the credentials and will make a worthwhile distributor that can also offer advice on locations.
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« Reply #72 on: Monday July 1 2019 18:51:16 AEST PM »

Oh is Reg going to be a distributor Howard?
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bugwhiskers
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« Reply #73 on: Monday July 1 2019 19:25:25 AEST PM »

  
Oh is Reg going to be a distributor Howard?
by
Yes and another will be added in a day or two
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« Reply #74 on: Monday July 1 2019 19:34:11 AEST PM »

The prerequisites for a good distributor are

Know, believe in and trust the product.
Prepared to share this to benefit their fellow prospectors.
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« Reply #75 on: Monday July 1 2019 19:42:33 AEST PM »

Great stuff mate. The more the merrier.
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Goldman
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« Reply #76 on: Friday July 5 2019 22:28:13 AEST PM »

  
There are a number of things to check if your QED appears to be abnormally noisy:

1. check and clean your coil plug both on the coil side and the QED side. Any dust in either can cause unwanted noise.

2. Ensure that the coil plug is ‘done up tight’ so that no movement can occur within the plug.

3. Ensure that your batteries are clipped solidly into place as any movement can cause unwanted noise.

4. Check fuse security to ensure that the fuse is securely mounted.

Cheers Goldman


Further to my post regarding things to check if your QED appears abnormally noisy, please also check your audio jack connection(s) to ensure your connection is tight and ‘clicks’ in solidly.

This applies equally to the large audio plug (into the QED itself) and if you are using one, the small audio plug connection into the audio plug adapter.

My audio plug adapter (small to large) fit became sloppy and caused all sorts of noise issues when out last week. New plug adapter and all is quiet again.

Cheers Goldman
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« Reply #77 on: Wednesday July 10 2019 20:02:28 AEST PM »

THS-B
SMALL COIL

As I have said previously, lowering THS-B below NULL accentuates rising pitch targets.

Just as importantly, it also increases depth; the more you can lower THS-B below NULL, the more depth you will get. The depth increase is significant.

Even if you are using very high THS-A settings, which by itself increases depth, you will get even more depth if you can lower THS-B as well, even if it’s only by 1.

By doing so you will be utilising one of the QEDs greatest features, the ability to dial in maximum performance when needed.

The one disadvantage of accentuating rising pitch targets by lowering THS-B is that it will also accentuate rising pitch ground noises. So if you are in an area with lots of rising pitch ground noises, then it’s best to use THS-B much closer to NULL and much higher THS-A settings.

LARGE COILS
The same applies when using medium to large coils, where you will be using very high THS-A settings. If you can increase THS-B above NULL by just 1, you will get greater depth

I urge you all to try these types of settings as you will be amazed how much extra depth you will achieve.

Cheers Goldman
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« Reply #78 on: Wednesday July 10 2019 20:59:33 AEST PM »

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.

So small coil below null increases depth and medium to large coil above null increases depth?

11” Commander mono. Where would you classify this coil in size to determine which way to go either side of null?

Cheers mate.

Al.
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Goldman
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« Reply #79 on: Wednesday July 10 2019 22:31:52 AEST PM »

  
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.

So small coil below null increases depth and medium to large coil above null increases depth?

11” Commander mono. Where would you classify this coil in size to determine which way to go either side of null?

Cheers mate.

Al.

Your coil size choice on any given session indicates what you are looking for. For example, if you decide to use a Sadie, 8” commander, 9” elite then you are looking for relatively shallow targets, which are mostly small gold (rising pitch). Of course if the small coil is waved over a shallow big bit (falling pitch) then you’re in luck.

It’s unlikely that you are patch hunting with a small coil, therefore using THS-B below NULL will accentuate the small targets, especially the really small bits that another well known brand and model excels at, but which when set up correctly, the QED and one of the above coils will find the same targets.

You could use a relatively highish THS-A (70 plus) with a THS-B as far below as you can (you’ll maybe only get 2 -3) below NULL or a medium THS-A setting (35-65), with THS-B way below NULL to achieve similar results.

If you are using a medium sized coil (11” to 14”), then by definition you are sacrificing the really small gold in preference to finding bigger gold at greater depth so you are looking for any gold in range of the coil. You SHOULD still use THS-B below NULL with highish THS-A (60-90) as most gold in this range will be smallish bits, with hopefully many larger bits. Note that the ‘A’ in THS-A is for ALL gold, so should be used high, with THS-B (just below NULL) to accentuate smallish gold and to increase depth.

With large coils (18” +) then you are definitely looking for big gold at depth (and sacrificing small gold) so a really, really high THS-A (75-90), high Gain (10 if possible) with THS-B above NULL (you’ll maybe only get one above) is the way to go.

In all of the above scenarios:
1) constantly check your Gain with the view of increasing it when you can.
2) you can only go as high with THS-A as the ground will allow, ditto with the THS-B below or above NULL
3) the trick is to setup without the QED being noisy but still with maximum allowable performance.

Cheers Goldman
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