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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:
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australian electronic gold prospecting forum.com  |  QED users  |  QED users (Moderator: bugwhiskers)  |  Topic: Enhancer 0 Members and 1 Guest are viewing this topic. « previous next »
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Author Topic: Enhancer  (Read 867 times)
Blip
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« on: Monday October 7 2019 19:16:50 AEDT PM »

Guys, the enhancer for Minelabs ie Steelphase SP01, would a specific unit for the QED be a viable option to produce?

If there was a QED enhancer id be interested. Can the likes of this be implemented with an amplifier. The amp isnt a biggie but!

Al.
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dasenator777
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« Reply #1 on: Monday October 7 2019 20:11:52 AEDT PM »

im pretty sure geoff at vk-tek does a amp and batt set up, not 100% though
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bugwhiskers
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« Reply #2 on: Monday October 7 2019 20:23:44 AEDT PM »

One of the problems with audio outputs is if they are strong enough to drive headphones they will overload other devices like booster amps. There is also the risk of volume that is too loud damaging hearing. The supplied Logitech speaker has a loop that could be used via a safety pin to position on your shoulder to make it easier to hear faint targets.
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« Reply #3 on: Monday October 7 2019 23:59:01 AEDT PM »

Bugs, what about the ‘enhancer’ side of it? Doesnt the SP01 enhance the detected signal? Have i got that right guys/Simon? Seeing as the SP01 doesnt work on the QED i wondered whether it was worth looking into from your perspective!
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phrunt
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« Reply #4 on: Tuesday October 8 2019 05:04:17 AEDT AM »

This is what the SP01 does taken from their website    

• Low background noise / distortion
• 3 filter options (compresses and enhances different audio frequencies)

Unique features include a Mode switch to accept stereo and mono wiring, and a 3 position Filter.

Perfectly suited to most detectors, but will provide excellent results particularly on gold detectors that have a faint signal response. Most detectors put out very clear audio, it’s usually the play back device that lets down the audio path. With the sP01, the Filter control allows you to control how much clarity you want coming through. When using stereo headphones, the Mode 2 position also opens up the audio, giving more clarity, with minimal background noise.

Now, it does work on the QED with some headphones, just not with the GME External speakers that most use it with on the GPX.  Something along the line causes it not to put out the volume required to drive the speakers.  Pat (Steelphase) tried making me a special cable he figured may fix the issue with the QED but unfortunately it didn't and the low volume persisted.   On the GPX you can hear me a mile away with the SP01 on external speakers :)

3 differently wired cables have been tried with no positive results so far.  I gave up and haven't tried again since.

I will have another tinker and see if I can get it working again.

Is the QED's audio output mono or stereo?

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bugwhiskers
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« Reply #5 on: Tuesday October 8 2019 07:09:49 AEDT AM »

The left and right channel lines are joined turning it into a MONO output.
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Blip
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« Reply #6 on: Tuesday October 8 2019 08:51:44 AEDT AM »

Thanks Simon.
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steelphase
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« Reply #7 on: Wednesday October 9 2019 17:11:56 AEDT PM »

  

Now, it does work on the QED with some headphones, just not with the GME External speakers that most use it with on the GPX.  Something along the line causes it not to put out the volume required to drive the speakers.  Pat (Steelphase) tried making me a special cable he figured may fix the issue with the QED but unfortunately it didn't and the low volume persisted.   On the GPX you can hear me a mile away with the SP01 on external speakers :)



Hey Simon

I hadn't realised that you didn't have any luck with speakers. I know a few users with headphones that have no issues at all when connected to the QED.

It seems the level of the QED output is just not high enough to drive the sP01 enhancer to full output.

Howard, the input impedance of the sP01 is around 1k. Maybe change a resistor value in the output divider just to give a little more output? A small increase in output level shouldn't be an issue for those not using any sort of amplifier/enhancer.

regards
Pat
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bugwhiskers
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« Reply #8 on: Wednesday October 9 2019 18:23:34 AEDT PM »

  
  

Now, it does work on the QED with some headphones, just not with the GME External speakers that most use it with on the GPX.  Something along the line causes it not to put out the volume required to drive the speakers.  Pat (Steelphase) tried making me a special cable he figured may fix the issue with the QED but unfortunately it didn't and the low volume persisted.   On the GPX you can hear me a mile away with the SP01 on external speakers :)



Hey Simon

I hadn't realised that you didn't have any luck with speakers. I know a few users with headphones that have no issues at all when connected to the QED.

It seems the level of the QED output is just not high enough to drive the sP01 enhancer to full output.

Howard, the input impedance of the sP01 is around 1k. Maybe change a resistor value in the output divider just to give a little more output? A small increase in output level shouldn't be an issue for those not using any sort of amplifier/enhancer.

regards
Pat

Just a change of one resistor value is all that is required to lift the output level.
Can you please advise a suggested peak to peak output level for optimum performance.
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« Reply #9 on: Wednesday October 9 2019 19:39:26 AEDT PM »

  


Just a change of one resistor value is all that is required to lift the output level.
Can you please advise a suggested peak to peak output level for optimum performance.

Around 1.5V p-p will be enough or around .6V rms . Its not too loud for headphone use (phones and i-pads etc seem to put out about 2v p-p max)
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phrunt
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« Reply #10 on: Thursday October 10 2019 09:56:51 AEDT AM »

Thanks Pat for your input, maybe Howard can implement the required changes in the next QED update.  I'd love to be able to use it on my QED.    The SP01 works on the QED with some headphones (not the Koss ur30's) but I like using external speakers and the QED / SP01 just can't power them.  It does however work on everything else, even my Gold Bug Pro / Sp01 can drive the 2 external GME speakers fine.

I use my QED for tiny gold hunting which I think it excels at, combined with the SP01's brilliant audio it would be a deadly combo on those tiny targets.

A QED with a built in SP01 would be a killer machine, both awesome Aussie products :)
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Doug
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« Reply #11 on: Thursday October 10 2019 11:48:49 AEDT AM »

  
  
  

Now, it does work on the QED with some headphones, just not with the GME External speakers that most use it with on the GPX.  Something along the line causes it not to put out the volume required to drive the speakers.  Pat (Steelphase) tried making me a special cable he figured may fix the issue with the QED but unfortunately it didn't and the low volume persisted.   On the GPX you can hear me a mile away with the SP01 on external speakers :)



Hey Simon

I hadn't realised that you didn't have any luck with speakers. I know a few users with headphones that have no issues at all when connected to the QED.

It seems the level of the QED output is just not high enough to drive the sP01 enhancer to full output.

Howard, the input impedance of the sP01 is around 1k. Maybe change a resistor value in the output divider just to give a little more output? A small increase in output level shouldn't be an issue for those not using any sort of amplifier/enhancer.

regards
Pat

Just a change of one resistor value is all that is required to lift the output level.
Can you please advise a suggested peak to peak output level for optimum performance.

Bugs could you use a class D audio amplifier like the LM48520 to boost the output?
doug smile
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Zoidzoid
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« Reply #12 on: Thursday October 10 2019 16:33:17 AEDT PM »

  
Guys, the enhancer for Minelabs ie Steelphase SP01, would a specific unit for the QED be a viable option to produce?

If there was a QED enhancer id be interested. Can the likes of this be implemented with an amplifier. The amp isnt a biggie but!

Al.
Testing the Qed with the Spo1 sound enhancer and the Quest wire free sound unit also using Minelab  koss u 30 head phones

Saturday, 24 June 2017
7:56 PM

Using Quest wireless unit on its own
your sound range is pretty restricted
As the sound range is not that high at full volume
But it is quite acceptable
Plug the Quest receiver unit output to the Spo1
 input .
using the supplied cord that comes
with the Spo1
With Koss U 30 head phones into the Spo1 out put 
With the Koss head phones you can use either
 No 1 Mono or No 2 position stereo
Sound volume  turned up or down to your preference 
Start at 1 and work up . 5 is halfway and it is fairly loud.


Qed sound out put coupled directly to the Spo1
With supplied Spo1 cord plus headphones
Works good as well (good back up if Quest batteries are flat) When buying a Spo1 ask for the coupling cord specifically for Qed as the minelab
Cord is different in the wiring config
( plus and extra 300mm longer )
Makes it easer being longer when hooked up directly to the Qed sound output
The Minelab speaker is slightly louder this way as well

Minelab speaker coupled to the Spo1 using the Quest is not very loud at all

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phrunt
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« Reply #13 on: Thursday October 10 2019 16:56:19 AEDT PM »

yes, you can get the SP01 to work with "some" headphones on the QED.  I also agree, the Quest Wifi on the QED is very quiet also and the QED / SP01 + external GME 8ohm speakers is very quiet.  It sounds like Steelphase has supplied the information required for this to be resolved.

Things like the little Nokia speaker and Logitech X-50 work brilliantly on the QED, both are nice and loud as are a majority of headphones I own except the Koss UR30's which are too quiet.  A single GME external speaker    plugged into the QED wired in Mono is very faint but as Howard said that's to be expected due to being designed to accept headphones, it's not amplified like the GPX.

My hearing is not brilliant so I like things to be rather loud.



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bugwhiskers
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« Reply #14 on: Thursday October 10 2019 17:57:47 AEDT PM »

Good information, thanks Blip.

I increased the audio output by 2 and it causes the old Nokia speaker to shut down.
It also causes the Logitech to be slightly distorted so a peak output somewhere in between is required.
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phrunt
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« Reply #15 on: Thursday October 10 2019 18:33:36 AEDT PM »

Thanks for working on this Howard, hopefully 1.5 works seeing 2 is too much.
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Blip
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« Reply #16 on: Thursday October 10 2019 22:03:44 AEDT PM »

  
  

Now, it does work on the QED with some headphones, just not with the GME External speakers that most use it with on the GPX.  Something along the line causes it not to put out the volume required to drive the speakers.  Pat (Steelphase) tried making me a special cable he figured may fix the issue with the QED but unfortunately it didn't and the low volume persisted.   On the GPX you can hear me a mile away with the SP01 on external speakers :)



Hey Simon

I hadn't realised that you didn't have any luck with speakers. I know a few users with headphones that have no issues at all when connected to the QED.

It seems the level of the QED output is just not high enough to drive the sP01 enhancer to full output.

Howard, the input impedance of the sP01 is around 1k. Maybe change a resistor value in the output divider just to give a little more output? A small increase in output level shouldn't be an issue for those not using any sort of amplifier/enhancer.

regards
Pat

Thanks Pat for your input.

I dont want to run headphones preferring earbuds. To have the option to run the SP01 on the QED with buds would be brilliant.

Currently i run the Quest and Ebay amp with my earbuds.

Al.
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Blip
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« Reply #17 on: Thursday October 10 2019 22:25:01 AEDT PM »

  
This is what the SP01 does taken from their website    

• Low background noise / distortion
• 3 filter options (compresses and enhances different audio frequencies)

Unique features include a Mode switch to accept stereo and mono wiring, and a 3 position Filter.

Perfectly suited to most detectors, but will provide excellent results particularly on gold detectors that have a faint signal response. Most detectors put out very clear audio, it’s usually the play back device that lets down the audio path. With the sP01, the Filter control allows you to control how much clarity you want coming through. When using stereo headphones, the Mode 2 position also opens up the audio, giving more clarity, with minimal background noise.

Now, it does work on the QED with some headphones, just not with the GME External speakers that most use it with on the GPX.  Something along the line causes it not to put out the volume required to drive the speakers.  Pat (Steelphase) tried making me a special cable he figured may fix the issue with the QED but unfortunately it didn't and the low volume persisted.   On the GPX you can hear me a mile away with the SP01 on external speakers :)

3 differently wired cables have been tried with no positive results so far.  I gave up and haven't tried again since.

I will have another tinker and see if I can get it working again.

Is the QED's audio output mono or stereo?



Pat,

“3 filter options”. Obviously the SP01 was optimised for the Minelabs. Would the QED run an audio frequency to match one of these filters?

Cheers.

Al.
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phrunt
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« Reply #18 on: Friday October 11 2019 04:31:09 AEDT AM »

I am pretty certain the QED / SP01 / Earbuds combo would already work.  It's only speakers and headphones that require a bit of extra juice that don't work properly.  What I've found is if the output device (speakers/earphones) work directly plugged in to the QED they work with the SP01, if they're too quiet directly plugged in the SP01 doesn't resolve it.
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« Reply #19 on: Friday October 11 2019 08:32:11 AEDT AM »

  

Thanks Pat for your input.

I dont want to run headphones preferring earbuds. To have the option to run the SP01 on the QED with buds would be brilliant.

Currently i run the Quest and Ebay amp with my earbuds.

Al.

The sP01 was originally designed for headphones (I consider earbuds as a style of headphones) so there should be no issue. The only issue that arises is when speakers are used. The output level of the sP01 will drive speakers but only if the input level is high enough. Personally I believe that if you use speakers you are missing very faint deep targets which is why I was not overly concerned with having a higher gain output stage. It was more important to keep quiescent noise low and output clean.
I am looking at making a cut down version of the sP01 that is for speakers only. Same case etc but no filter, just the on/off sw, volume control, same enhancement circuit and a higher level output amp. It will have higher noise specs than the sP01 but this wont be an issue when using speakers.

regards
Pat
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