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QED users => QED users => Topic started by: Blip on Monday October 7 2019 19:16:50 AEDT PM



Title: Enhancer
Post by: Blip 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.


Title: Re: Enhancer
Post by: dasenator777 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


Title: Re: Enhancer
Post by: bugwhiskers 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.


Title: Re: Enhancer
Post by: Blip 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!


Title: Re: Enhancer
Post by: phrunt on Tuesday October 8 2019 05:04:17 AEDT AM
This is what the SP01 does taken from their website  https://steelphase.com.au/ (https://steelphase.com.au/)

• 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?



Title: Re: Enhancer
Post by: bugwhiskers on Tuesday October 8 2019 07:09:49 AEDT AM
The left and right channel lines are joined turning it into a MONO output.


Title: Re: Enhancer
Post by: Blip on Tuesday October 8 2019 08:51:44 AEDT AM
Thanks Simon.


Title: Re: Enhancer
Post by: steelphase 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


Title: Re: Enhancer
Post by: bugwhiskers 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.


Title: Re: Enhancer
Post by: steelphase 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)


Title: Re: Enhancer
Post by: phrunt 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 :)


Title: Re: Enhancer
Post by: Doug 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 ::419::


Title: Re: Enhancer
Post by: Zoidzoid 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



Title: Re: Enhancer
Post by: phrunt 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 https://www.gme.net.au/catalogue/accessories/extension-speakers/spk07.aspx (https://www.gme.net.au/catalogue/accessories/extension-speakers/spk07.aspx) 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.





Title: Re: Enhancer
Post by: bugwhiskers 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.


Title: Re: Enhancer
Post by: phrunt 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.


Title: Re: Enhancer
Post by: Blip 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.


Title: Re: Enhancer
Post by: Blip on Thursday October 10 2019 22:25:01 AEDT PM
  
This is what the SP01 does taken from their website  https://steelphase.com.au/ (https://steelphase.com.au/)

• 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.


Title: Re: Enhancer
Post by: phrunt 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.


Title: Re: Enhancer
Post by: steelphase 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


Title: Re: Enhancer
Post by: Blip on Friday October 11 2019 09:49:57 AEDT AM
Thanks Simon and Pat.

Fine run in conjunction with the Quest wire free mate?

Id run the Quest, SP01 with earbuds.

Al.


Title: Re: Enhancer
Post by: steelphase on Friday October 11 2019 09:55:27 AEDT AM
  
Thanks Simon and Pat.

Fine run in conjunction with the Quest wire free mate?

Id run the Quest, SP01 with earbuds.

Al.

I run the wire free mate with my 4500 and the sP01 no problems at all.

regards
Pat


Title: Re: Enhancer
Post by: Blip on Friday October 11 2019 10:55:12 AEDT AM
Awesome Pat, thanks.


Title: Re: Enhancer
Post by: phrunt on Friday October 11 2019 14:44:53 AEDT PM
I will try QED / Quest Wirefree / SP01 / Earbuds tomorrow for you and let you know how I go, I am confident that combination will work.  Note Pat said 4500, not QED Al, the 4500 has amplified audio.


Title: Re: Enhancer
Post by: Blip on Friday October 11 2019 17:25:55 AEDT PM
  
I will try QED / Quest Wirefree / SP01 / Earbuds tomorrow for you and let you know how I go, I am confident that combination will work.  Note Pat said 4500, not QED Al, the 4500 has amplified audio.

Yeah got that Simon. Be good to hear how you go mate, thanks.


Title: Re: Enhancer
Post by: phrunt on Friday October 11 2019 17:51:54 AEDT PM
Tried it tonight, works fine, it was in fact quite loud.  So it's just certain headphones and all non-powered external speakers it seems.

The Logitech X-50 solution is pretty good, nice loud audio but they don't last a days detecting so I had to buy two. In summer here we only get about 6 hours of darkness so there is a lot of detecting time in a day.   I like the SP01 for it's enhanced audio and paired with GME speakers it's battery life is a non-issue.  Lasts longer than I'd need it to.    I'm just not a headphone person, I'm fussy :)


Title: Re: Enhancer
Post by: Blip on Friday October 11 2019 19:19:05 AEDT PM
  
Tried it tonight, works fine, it was in fact quite loud.  So it's just certain headphones and all non-powered external speakers it seems.

The Logitech X-50 solution is pretty good, nice loud audio but they don't last a days detecting so I had to buy two. In summer here we only get about 6 hours of darkness so there is a lot of detecting time in a day.   I like the SP01 for it's enhanced audio and paired with GME speakers it's battery life is a non-issue.  Lasts longer than I'd need it to.    I'm just not a headphone person, I'm fussy :)


Fairdinkum Simon what took ya!  ::419::

Thanks mate thats great!


Title: Re: Enhancer
Post by: phrunt on Saturday October 12 2019 05:48:52 AEDT AM
I'd still llike Howard to have a tinker with the audio output and see if it can be adjusted to suit higher power requirement headphones and so on which then will allow the SP01 to be used without effecting existing speakers like the X-50.

Easiest test is the Koss UR-30 headphones that ML supply with some of their detectors, someone living near Howard must have a set they can let him use for testing if he doesn't have any.  If he can get good volume coming through those headphones plugged directly into the QED then that's the issue resolved.  If not I could post some over to him.

It's the closest thing to a flaw I've found with the QED, everything else I'm very happy with so if that was resolved I'd be over the moon.


Title: Re: Enhancer
Post by: bugwhiskers on Saturday October 12 2019 06:49:27 AEDT AM
The QED audio circuit. Note that the Left and Right plug connections are joined.
Changing the 470 ohm resistor to 1k resulted in a level too high for the 2 speakers it was tested on. 680 ohm may be the best compromise. It's really not possible to create a fixed output audio that suits both headphones and external amplifiers.


Title: Re: Enhancer
Post by: phrunt on Saturday October 12 2019 07:52:21 AEDT AM
Bugger, is there a way to do a switch to select between the two? Keep in mind I have no idea what I'm talking about and I'm probably asking too much :)


Title: Re: Enhancer
Post by: bugwhiskers on Saturday October 12 2019 09:36:34 AEDT AM
I will try a few things.
If the input gain was raised or attenuation reduced in the SP01, that would help.


Title: Re: Enhancer
Post by: steelphase on Saturday October 12 2019 10:00:22 AEDT AM
  
I will try QED / Quest Wirefree / SP01 / Earbuds tomorrow for you and let you know how I go, I am confident that combination will work.  Note Pat said 4500, not QED Al, the 4500 has amplified audio.

The 4500 is only amplified when using a certain plug configuration. The Quest unit doesnt trigger the amplifier in the 4500.


Title: Re: Enhancer
Post by: steelphase on Saturday October 12 2019 10:09:01 AEDT AM
  
I will try a few things.
If the input gain was raised or attenuation reduced in the SP01, that would help.


Unfortunately any increase in input gain overloads the amp stage of the enhancer when used with the ML machines.


Title: Re: Enhancer
Post by: Blip on Saturday October 12 2019 11:48:50 AEDT AM
  
  
I will try QED / Quest Wirefree / SP01 / Earbuds tomorrow for you and let you know how I go, I am confident that combination will work.  Note Pat said 4500, not QED Al, the 4500 has amplified audio.

The 4500 is only amplified when using a certain plug configuration.

Pat, are you able to elaborate on this please? “Plug configuration “

Al.


Title: Re: Enhancer
Post by: steelphase on Saturday October 12 2019 15:52:09 AEDT PM
  
  
  
I will try QED / Quest Wirefree / SP01 / Earbuds tomorrow for you and let you know how I go, I am confident that combination will work.  Note Pat said 4500, not QED Al, the 4500 has amplified audio.

The 4500 is only amplified when using a certain plug configuration.

Pat, are you able to elaborate on this please? “Plug configuration “

Al.

A ML GPX battery has a stereo socket fitted for the audio output. If only the ring and tip are connected on the stereo plug (earth left disconnected), an amplifier in the GPX battery is triggered. This is to allow users to have extra volume when connecting speakers.

regards Pat


Title: Re: Enhancer
Post by: Blip on Saturday October 12 2019 17:07:04 AEDT PM
  
  
  
  
I will try QED / Quest Wirefree / SP01 / Earbuds tomorrow for you and let you know how I go, I am confident that combination will work.  Note Pat said 4500, not QED Al, the 4500 has amplified audio.

The 4500 is only amplified when using a certain plug configuration.

Yeah ok, gotchya, thankyou.
Pat, are you able to elaborate on this please? “Plug configuration “

Al.

A ML GPX battery has a stereo socket fitted for the audio output. If only the ring and tip are connected on the stereo plug (earth left disconnected), an amplifier in the GPX battery is triggered. This is to allow users to have extra volume when connecting speakers.

regards Pat


Title: Re: Enhancer
Post by: GARY on Saturday October 12 2019 18:00:09 AEDT PM
I cannot get the SP01 to work at all on the QED with either my 32ohm headphone or Nokia and Logitech external speakers. All I get is a buzz type sound in the headphone & speakers. Also I tried different settings on the SP01 but still the buzz type sound persisted. I was then concerned would the SP01 still work on the GPX after my tests and yes it worked okay.

Gary.


Title: Re: Enhancer
Post by: bugwhiskers on Saturday October 12 2019 19:10:26 AEDT PM
I have seen some QED's fitted with a headphone amplifier that also has an internal battery and volume control. Next time I come across one I will post the info.


Title: Re: Enhancer
Post by: GARY on Saturday October 12 2019 19:29:32 AEDT PM
Both of the tiny amplifiers that D777 and Blip mentioned a while ago here as well on FB that I also have work fine on the QED and also on the GPX. I have now one of these tiny amps, the one that has the Volume Knob also as an On- Off switch, attached to the side of the QED control box which allows me to adjust the volume level with the Nokia external speaker as well to my headphones, both of which have no volume control.

Gary.


Title: Re: Enhancer
Post by: phrunt on Saturday October 12 2019 19:36:53 AEDT PM
  
I cannot get the SP01 to work at all on the QED with either my 32ohm headphone or Nokia and Logitech external speakers. All I get is a buzz type sound in the headphone & speakers. Also I tried different settings on the SP01 but still the buzz type sound persisted. I was then concerned would the SP01 still work on the GPX after my tests and yes it worked okay.

Gary.

I had that too, it's the cable you're using, try pull the cable out a little bit on the QED so the contacts touch a different area and it will kick in, again it will have low audio volume.   I guess I'll just have to try get another amp for the QED, the one blip has won't send to NZ, I guess because of the battery/aeroplanes issue. I'll just keep using the SP01 on the GPX and the VLF's and find an alternative for the QED.  It won't be a B&Z, I couldn't bring myself to buy one of them.  I'll have to source one from China probably, they seem to get around the lithium battery and planes issue.

I like the look of these two.

https://www.aliexpress.com/item/4000109562855.html?spm=a2g0o.productlist.0.0.516b6550eu19PR&algo_pvid=1c7e6127-20a0-4d5e-9472-a351bc4bf0f0&algo_expid=1c7e6127-20a0-4d5e-9472-a351bc4bf0f0-29&btsid=05996f09-c831-4cd2-90ff-43f5f5b24b0c&ws_ab_test=searchweb0_0,searchweb201602_8,searchweb201603_52 (https://www.aliexpress.com/item/4000109562855.html?spm=a2g0o.productlist.0.0.516b6550eu19PR&algo_pvid=1c7e6127-20a0-4d5e-9472-a351bc4bf0f0&algo_expid=1c7e6127-20a0-4d5e-9472-a351bc4bf0f0-29&btsid=05996f09-c831-4cd2-90ff-43f5f5b24b0c&ws_ab_test=searchweb0_0,searchweb201602_8,searchweb201603_52)

https://www.aliexpress.com/item/4000051042829.html?spm=a2g0o.productlist.0.0.31a17c51uYCseW&algo_pvid=606273d6-d7cc-49c7-831e-f727978da800&algo_expid=606273d6-d7cc-49c7-831e-f727978da800-24&btsid=f513f840-492b-49f7-a7b6-7f92984f235c&ws_ab_test=searchweb0_0,searchweb201602_8,searchweb201603_52 (https://www.aliexpress.com/item/4000051042829.html?spm=a2g0o.productlist.0.0.31a17c51uYCseW&algo_pvid=606273d6-d7cc-49c7-831e-f727978da800&algo_expid=606273d6-d7cc-49c7-831e-f727978da800-24&btsid=f513f840-492b-49f7-a7b6-7f92984f235c&ws_ab_test=searchweb0_0,searchweb201602_8,searchweb201603_52)


Title: Re: Enhancer
Post by: GARY on Saturday October 12 2019 19:54:50 AEDT PM
Have not tried what you said Simon however if little volume then of little use. As you say I will also use the SP01 for the GPX. I have tested the B&Z, Rooster Booster, Nugget Booster, against the on board GPX Battery booster and found very little difference between them all. As yet to try and test the SP01 on the GPX in the goldfield.

Gary.


Title: Re: Enhancer
Post by: GARY on Saturday October 12 2019 20:13:29 AEDT PM
Another issue I had with the Rooster Booster and Nugget Booster was they use the GPX battery to power them although not sure of the mAh they draw for them to operate. I was also told the on-board GPX battery booster draws 100mAh to operate. However the tiny amps I mentioned and the SP01 using their own lithium battery as the power source.

Gary.


Title: Re: Enhancer
Post by: steelphase on Saturday October 12 2019 20:55:50 AEDT PM
  
Have not tried what you said Simon however if little volume then of little use. As you say I will also use the SP01 for the GPX. I have tested the B&Z, Rooster Booster, Nugget Booster, against the on board GPX Battery booster and found very little difference between them all. As yet to try and test the SP01 on the GPX in the goldfield.

Gary.

To run the sP01 on a QED you require a different input cable.

regards
Pat


Title: Re: Enhancer
Post by: dasenator777 on Sunday October 13 2019 01:35:11 AEDT AM
  
Both of the tiny amplifiers that D777 and Blip mentioned a while ago here as well on FB that I also have work fine on the QED and also on the GPX. I have now one of these tiny amps, the one that has the Volume Knob also as an On- Off switch, attached to the side of the QED control box which allows me to adjust the volume level with the Nokia external speaker as well to my headphones, both of which have no volume control.

Gary.
i dont have any issues with headphones or external speakers running off the little amp i have the same as BLIPS, also the booster with in built speaker i use works the best, i dont even have to switch the gain on or its way to load, can plug earphones straight into it too, i posted a link somewhere here, just look for ukelee guitar amp on sleazebay. ::62::


Title: Re: Enhancer
Post by: dasenator777 on Sunday October 13 2019 01:37:18 AEDT AM
  
I have seen some QED's fitted with a headphone amplifier that also has an internal battery and volume control. Next time I come across one I will post the info.
theres a link somewhere on here BUGS, have posted it a couple times.  ::62::


Title: Re: Enhancer
Post by: dasenator777 on Sunday October 13 2019 01:40:56 AEDT AM
  
  
I cannot get the SP01 to work at all on the QED with either my 32ohm headphone or Nokia and Logitech external speakers. All I get is a buzz type sound in the headphone & speakers. Also I tried different settings on the SP01 but still the buzz type sound persisted. I was then concerned would the SP01 still work on the GPX after my tests and yes it worked okay.

Gary.

I had that too, it's the cable you're using, try pull the cable out a little bit on the QED so the contacts touch a different area and it will kick in, again it will have low audio volume.   I guess I'll just have to try get another amp for the QED, the one blip has won't send to NZ, I guess because of the battery/aeroplanes issue. I'll just keep using the SP01 on the GPX and the VLF's and find an alternative for the QED.  It won't be a B&Z, I couldn't bring myself to buy one of them.  I'll have to source one from China probably, they seem to get around the lithium battery and planes issue.

I like the look of these two.

https://www.aliexpress.com/item/4000109562855.html?spm=a2g0o.productlist.0.0.516b6550eu19PR&algo_pvid=1c7e6127-20a0-4d5e-9472-a351bc4bf0f0&algo_expid=1c7e6127-20a0-4d5e-9472-a351bc4bf0f0-29&btsid=05996f09-c831-4cd2-90ff-43f5f5b24b0c&ws_ab_test=searchweb0_0,searchweb201602_8,searchweb201603_52 (https://www.aliexpress.com/item/4000109562855.html?spm=a2g0o.productlist.0.0.516b6550eu19PR&algo_pvid=1c7e6127-20a0-4d5e-9472-a351bc4bf0f0&algo_expid=1c7e6127-20a0-4d5e-9472-a351bc4bf0f0-29&btsid=05996f09-c831-4cd2-90ff-43f5f5b24b0c&ws_ab_test=searchweb0_0,searchweb201602_8,searchweb201603_52)

https://www.aliexpress.com/item/4000051042829.html?spm=a2g0o.productlist.0.0.31a17c51uYCseW&algo_pvid=606273d6-d7cc-49c7-831e-f727978da800&algo_expid=606273d6-d7cc-49c7-831e-f727978da800-24&btsid=f513f840-492b-49f7-a7b6-7f92984f235c&ws_ab_test=searchweb0_0,searchweb201602_8,searchweb201603_52 (https://www.aliexpress.com/item/4000051042829.html?spm=a2g0o.productlist.0.0.31a17c51uYCseW&algo_pvid=606273d6-d7cc-49c7-831e-f727978da800&algo_expid=606273d6-d7cc-49c7-831e-f727978da800-24&btsid=f513f840-492b-49f7-a7b6-7f92984f235c&ws_ab_test=searchweb0_0,searchweb201602_8,searchweb201603_52)

that guitar amp workd the best on the qed, can have speaker or plug phones in it , 9v battery lasts about 35hrs  ::419::


Title: Re: Enhancer
Post by: phrunt on Sunday October 13 2019 04:22:05 AEDT AM
Ok, so the conclusion for the  SP01 on the QED is it needs a different input cable than when it's used on a GPX 4500.  Pat has made me that cable and it does work with the SP01 + headphones/earbuds (Important: As long as the headphones/earbuds work by being plugged directly into the QED).  The reason is the SP01's standard input cable is designed to disable the internal amplifier on the GPX.  Once using the different input cable the SP01 works fine on the QED with any headphones that work natively plugged into the QED and all the benefits of the SP01 are there.  If you're a headphone user, this is a highly recommended combination.

I'm now seeking an alternative for the QED to use external speakers.  Has anyone used the Guitar amp that uses 9v batteries? I do like the look of it, it's input cable is the same size as the QED's output too and easy to change batteries in the field if it goes flat :)  I see many amps with lithium batteries but their battery life is only about 6 hours, that's not suitable for me, that'll get me through until lunch time so I'd need 2 or 3 of them to last a days detecting.
 



Title: Re: Enhancer
Post by: bugwhiskers on Sunday October 13 2019 07:20:30 AEDT AM
For those with the equipment, skill and confidence there is the option of taking the Logitech speaker apart and routing the speaker wires to a socket to drive headphones.

Benefits:

Low cost
Light weight
Bluetooth
Volume controls
Long battery life

Audio out is the empty socket top right.


Title: Re: Enhancer
Post by: GARY on Sunday October 13 2019 08:36:25 AEDT AM
These are the two mini amplifiers I have for use on the QED.
They both appear to be the same except the one on the left uses the volume knob as the on/off switch whereas the one on the right uses a very tiny slide switch.

However the sP01 has move adjustment/setting options.  

Gary.


Title: Re: Enhancer
Post by: GARY on Sunday October 13 2019 08:46:05 AEDT AM
As I said I am yet to try the sP01 out in the goldfield.

Also I am trying to understand what Pat said on another forum in that it depends on what frequency your threshold runs at, then each filter will be slightly different. The filter switch selects a certain band of frequencies to be enhanced and so depending on the threshold frequency, the effect of each setting will be different. Therefore for this to work effectively it needs to work on a band of frequencies. This band will vary depending on the tone of the users threshold. The filter switch is basically there to move that band of frequencies.

Gary.


Title: Re: Enhancer
Post by: bugwhiskers on Sunday October 13 2019 09:28:34 AEDT AM
Hi Gary, what did the setup cost?


Title: Re: Enhancer
Post by: GARY on Sunday October 13 2019 09:55:10 AEDT AM
G'day Howard,

If you are referring to the mini amplifiers then the one on the left cost $26.20 and the one on the right was $36.95 both delivered freight free.

The sP01 cost a lot more however my family purchased all three for me as part of their Father's Day gifts to me, lucky me.

However if you are referring to everything in regards to the QEDs then it's all thanks to you.

Gary.


Title: Re: Enhancer
Post by: Blip on Sunday October 13 2019 10:35:47 AEDT AM
  
  
I cannot get the SP01 to work at all on the QED with either my 32ohm headphone or Nokia and Logitech external speakers. All I get is a buzz type sound in the headphone & speakers. Also I tried different settings on the SP01 but still the buzz type sound persisted. I was then concerned would the SP01 still work on the GPX after my tests and yes it worked okay.

Gary.

I had that too, it's the cable you're using, try pull the cable out a little bit on the QED so the contacts touch a different area and it will kick in, again it will have low audio volume.   I guess I'll just have to try get another amp for the QED, the one blip has won't send to NZ, I guess because of the battery/aeroplanes issue. I'll just keep using the SP01 on the GPX and the VLF's and find an alternative for the QED.  It won't be a B&Z, I couldn't bring myself to buy one of them.  I'll have to source one from China probably, they seem to get around the lithium battery and planes issue.

I like the look of these two.

https://www.aliexpress.com/item/4000109562855.html?spm=a2g0o.productlist.0.0.516b6550eu19PR&algo_pvid=1c7e6127-20a0-4d5e-9472-a351bc4bf0f0&algo_expid=1c7e6127-20a0-4d5e-9472-a351bc4bf0f0-29&btsid=05996f09-c831-4cd2-90ff-43f5f5b24b0c&ws_ab_test=searchweb0_0,searchweb201602_8,searchweb201603_52 (https://www.aliexpress.com/item/4000109562855.html?spm=a2g0o.productlist.0.0.516b6550eu19PR&algo_pvid=1c7e6127-20a0-4d5e-9472-a351bc4bf0f0&algo_expid=1c7e6127-20a0-4d5e-9472-a351bc4bf0f0-29&btsid=05996f09-c831-4cd2-90ff-43f5f5b24b0c&ws_ab_test=searchweb0_0,searchweb201602_8,searchweb201603_52)

https://www.aliexpress.com/item/4000051042829.html?spm=a2g0o.productlist.0.0.31a17c51uYCseW&algo_pvid=606273d6-d7cc-49c7-831e-f727978da800&algo_expid=606273d6-d7cc-49c7-831e-f727978da800-24&btsid=f513f840-492b-49f7-a7b6-7f92984f235c&ws_ab_test=searchweb0_0,searchweb201602_8,searchweb201603_52 (https://www.aliexpress.com/item/4000051042829.html?spm=a2g0o.productlist.0.0.31a17c51uYCseW&algo_pvid=606273d6-d7cc-49c7-831e-f727978da800&algo_expid=606273d6-d7cc-49c7-831e-f727978da800-24&btsid=f513f840-492b-49f7-a7b6-7f92984f235c&ws_ab_test=searchweb0_0,searchweb201602_8,searchweb201603_52)




Simon, that first one im sure Dasenator uses that one. The second one looks identical to thee one i use only printing on it is different. There is another on ebay that has a larger battery for a little more. That amp on AliExpress is dearer than on ebay but not a biggie if you need to get one into the country. Id prob go for one with the larger battery. I havent ran mine for a full day yet so cant give feedback on it’s longevity.


Title: Re: Enhancer
Post by: Blip on Sunday October 13 2019 10:39:45 AEDT AM
https://www.ebay.com.au/itm/Portable-Audio-HIFI-Headphone-Amplifier-Earphone-AMP-with-Audio-USB-Cable-AUS/202371054547?epid=27034408030&hash=item2f1e413bd3:g:eT4AAOSwUEFdmtEN:sc:AU_StandardDelivery!2153!AU!-1


Title: Re: Enhancer
Post by: Blip on Sunday October 13 2019 10:51:56 AEDT AM
  
As I said I am yet to try the sP01 out in the goldfield.

Also I am trying to understand what Pat said on another forum in that it depends on what frequency your threshold runs at, then each filter will be slightly different. The filter switch selects a certain band of frequencies to be enhanced and so depending on the threshold frequency, the effect of each setting will be different. Therefore for this to work effectively it needs to work on a band of frequencies. This band will vary depending on the tone of the users threshold. The filter switch is basically there to move that band of frequencies.

Gary.

Im having troubles with tthe ipad atm so iff i post and itt doesnt make sense youll get it!

Gary, that second amp has a larger battery. Id be surprised if that doesnt run for 8 hrs!

Re frequencies yeah heence why i asked Pat if the SP01 would suit the QED in that rregard.


Title: Re: Enhancer
Post by: GARY on Sunday October 13 2019 11:23:18 AEDT AM
  

Gary, that second amp has a larger battery. Id be surprised if that doesnt run for 8 hrs!


Okay as there is a difference in weight between the the one on right which weights 115grams and the one on the left 78grams. Have detected for 6 hours straight with the one on the right on the QED, so battery life up  until then, no issues.

Gary 


Title: Re: Enhancer
Post by: swaterhouse on Sunday October 13 2019 11:49:37 AEDT AM
  
  

Gary, that second amp has a larger battery. Id be surprised if that doesnt run for 8 hrs!


Okay as there is a difference in weight between the the one on right which weights 115grams and the one on the left 78grams. Have detected for 6 hours straight with the one on the right on the QED, so battery life up  until then, no issues.

Gary 

If a guitar amp works however battery life isn't past 6-8 hours then you would just run this attached to it through out the day:

EBAY ITEM : Renogy 10000mAh Solar Power Bank Dual USB Phone Charger Camping Hiking LED light

EBAY LINK : https://www.ebay.com.au/itm/Renogy-10000mAh-Solar-Power-Bank-Dual-USB-Phone-Charger-Camping-Hiking-LED light/293107680483?hash=item443e9444e3:g:g58AAOSwh-Jc7jHM&frcectupt=true

I personally am about to get a QED PL2 and I'm wanting to get a audio booster. I was considering for the QED: DETacc BE02 Audio Amplifier

Has anyone used this?





Title: Re: Enhancer
Post by: phrunt on Sunday October 13 2019 14:45:49 AEDT PM
Thanks for the link Blip, only problem is ...... the same problem always from OZ with ebay and lithium batteries.

Postage:
Doesn't post to New Zealand | See details
 
Item location:
NSW, Australia
 
Posts to:
Australia See exclusions

If I buy from Aliexpress the Chinese seem to have ways around batteries and shipping, they can do it no issues.

If Pat's intending to make a new SP01 for external speakers that will work on the QED I'd be in queue to buy that as I am certain I'd rather use my SP01 than a normal headphone amp, it's worth the dough.

I ordered that 9v guitar amp in the meantime, I might gut a X-50 and try that out too, thanks for the idea Howard.

Maybe I just need to fork out the cash and buy this one, 12 hour battery life... that's more my style

https://www.aliexpress.com/item/32400230250.html?spm=a2g0o.productlist.0.0.516b6550eu19PR&s=p (https://www.aliexpress.com/item/32400230250.html?spm=a2g0o.productlist.0.0.516b6550eu19PR&s=p)


Title: Re: Enhancer
Post by: dasenator777 on Sunday October 13 2019 15:13:23 AEDT PM
yes the LH380 guitar amp is the same as the one i use, i know a few members from another forum have used them in WA for a few seasons now. i run a 9v square lithium battery in mine, have never run out of juice recharge the battery every night.


Title: Re: Enhancer
Post by: Blip on Sunday October 13 2019 15:18:22 AEDT PM
  
Thanks for the link Blip, only problem is ...... the same problem always from OZ with ebay and lithium batteries.

Postage:
Doesn't post to New Zealand | See details
 
Item location:
NSW, Australia
 
Posts to:
Australia See exclusions

If I buy from Aliexpress the Chinese seem to have ways around batteries and shipping, they can do it no issues.

If Pat's intending to make a new SP01 for external speakers that will work on the QED I'd be in queue to buy that as I am certain I'd rather use my SP01 than a normal headphone amp, it's worth the dough.

I ordered that 9v guitar amp in the meantime, I might gut a X-50 and try that out too, thanks for the idea Howard.

Maybe I just need to fork out the cash and buy this one, 12 hour battery life... that's more my style

https://www.aliexpress.com/item/32400230250.html?spm=a2g0o.productlist.0.0.516b6550eu19PR&s=p (https://www.aliexpress.com/item/32400230250.html?spm=a2g0o.productlist.0.0.516b6550eu19PR&s=p)


Here Simon. 1500ma battery against the one you listed at 1200ma

https://www.aliexpress.com/item/32870734227.html?spm=a2g0o.productlist.0.0.7c165bc0nLZsjx&algo_pvid=f026112a-06b5-4ce8-a047-694c2e56fb42&algo_expid=f026112a-06b5-4ce8-a047-694c2e56fb42-5&btsid=e58535d0-b7aa-4e00-b603-0f26e406fe76&ws_ab_test=searchweb0_0,searchweb201602_1,searchweb201603_55


Title: Re: Enhancer
Post by: phrunt on Sunday October 13 2019 15:18:54 AEDT PM
Thanks for the reply, I've ordered it now and the battery life is what attracted me to it.  I need long battery life as my detecting days are a minimum of 12 hours.  I'm hoping it can drive external speakers.  I'm also hoping Steelphase makes a SP01 at some point for the task :)

Thanks also Blip, that one you posted lasts 8 hours and the more expensive one 10 hours.  Getting there.  The one you posted also says Adapted headphone impedance: 10-150ohm, the GME external speakers are 8ohm so I don't know if they're going to play nicely together.


Title: Re: Enhancer
Post by: Blip on Sunday October 13 2019 15:25:31 AEDT PM
This one here has the 2000ma battery.

https://www.aliexpress.com/item/32926291812.html?spm=a2g0o.productlist.0.0.7c165bc0nLZsjx&algo_pvid=f026112a-06b5-4ce8-a047-694c2e56fb42&algo_expid=f026112a-06b5-4ce8-a047-694c2e56fb42-11&btsid=e58535d0-b7aa-4e00-b603-0f26e406fe76&ws_ab_test=searchweb0_0,searchweb201602_1,searchweb201603_55


Title: Re: Enhancer
Post by: bugwhiskers on Sunday October 13 2019 15:28:03 AEDT PM
  
Thanks for the link Blip, only problem is ...... the same problem always from OZ with ebay and lithium batteries.

Postage:
Doesn't post to New Zealand | See details
 
Item location:
NSW, Australia
 
Posts to:
Australia See exclusions

If I buy from Aliexpress the Chinese seem to have ways around batteries and shipping, they can do it no issues.

If Pat's intending to make a new SP01 for external speakers that will work on the QED I'd be in queue to buy that as I am certain I'd rather use my SP01 than a normal headphone amp, it's worth the dough.

I ordered that 9v guitar amp in the meantime, I might gut a X-50 and try that out too, thanks for the idea Howard.

Maybe I just need to fork out the cash and buy this one, 12 hour battery life... that's more my style

https://www.aliexpress.com/item/32400230250.html?spm=a2g0o.productlist.0.0.516b6550eu19PR&s=p (https://www.aliexpress.com/item/32400230250.html?spm=a2g0o.productlist.0.0.516b6550eu19PR&s=p)


It drives headphones easily and earbuds also.


Title: Re: Enhancer
Post by: bugwhiskers on Sunday October 13 2019 15:31:07 AEDT PM
Regarding filtering, the QED has digital filtering for both pitch and amplitude. This is a major contributor to it's EMI rejection. If you watch comparison videos of the SDC2300 and the QED it jumps out.


Title: Re: Enhancer
Post by: phrunt on Sunday October 13 2019 15:39:09 AEDT PM
  
Regarding filtering, the QED has digital filtering for both pitch and amplitude. This is a major contributor to it's EMI rejection. If you watch comparison videos of the SDC2300 and the QED it jumps out.

The EMI rejection on the QED is outstanding.  Very handy in an area where the gold fields tend to have power lines all over them :)  Lots of department of conservation land protected for its outstanding natural landscape, but great to run high voltage power lines from the hydro dams over  ::620::


Title: Re: Enhancer
Post by: dasenator777 on Sunday October 13 2019 15:44:01 AEDT PM
we have rows and rows of those ugly bloody wind generators around here, cant use any other detector anywhere near them even some high freq vlfs as well, have never had a problem using the QED around this area ever.  ::10 ::


Title: Re: Enhancer
Post by: Eski on Sunday October 13 2019 15:46:36 AEDT PM
SPeakers have a mono plug right? . why not sense when L and R are shorted and change the resistor value?


Title: Re: Enhancer
Post by: dasenator777 on Sunday October 13 2019 15:48:42 AEDT PM
BLIP how many hours a week do you spend searching stuff on aliexpress, id be around 4 to 5 i reckion, have seen quite a few things from there for sale in supercheap auto, with their packaging of course, and a 400% mark up too.  ::62::


Title: Re: Enhancer
Post by: dasenator777 on Sunday October 13 2019 15:51:18 AEDT PM
ive seen somewhere a piece of masking tape put on the connector for some reason what would this do ?????


Title: Re: Enhancer
Post by: phrunt on Sunday October 13 2019 16:09:05 AEDT PM
probably turning a plug from stereo to mono.


Title: Re: Enhancer
Post by: bugwhiskers on Sunday October 13 2019 17:01:12 AEDT PM
  
SPeakers have a mono plug right? . why not sense when L and R are shorted and change the resistor value?

The QED audio socket is Stereo but L&R are shorted as the audio output is mono, not stereo.
Metal Detector audio has been a hot topic for many years and lots of boosters and other gadgets have come and gone.


Title: Re: Enhancer
Post by: Blip on Sunday October 13 2019 21:00:37 AEDT PM
  
BLIP how many hours a week do you spend searching stuff on aliexpress, id be around 4 to 5 i reckion, have seen quite a few things from there for sale in supercheap auto, with their packaging of course, and a 400% mark up too.  ::62::

Jas, bugger all these days mate. I got shafted with some LED chips as i was modding lamps and AliExpress wouldnt support me. They supported the dodgy seller so stuff them. There is some good stuff on there though. Ive bought alot off there over the years. Like you say some stuff is sold through the likes of Supercheap for a huge markup. I like how some people say they wouldnt buy that cheap junk but are unaware they are buying the same stuff locally at a huge markup!


Title: Re: Enhancer
Post by: dasenator777 on Saturday October 19 2019 18:55:24 AEDT PM
i havnt had any problems YET lol, atleast they have a pretty good buyer protection funds held in escrow till item received and rating left. stay away from ebay now most of the stuff can be fould on ali anyway Al . theres another site made in china, very similar to ali too.  ::402::


Title: Re: Enhancer
Post by: Blip on Tuesday October 22 2019 19:42:25 AEDT PM
Just that ive had troubles with Ali Jas. Some of the shifty sellers on there sent me incorrect LEDs and lamps. Ali wouldnt back me going with the sellers regardless of me supplying proof by photos! Pricks!


Title: Re: Enhancer
Post by: dasenator777 on Tuesday October 22 2019 22:56:39 AEDT PM
  
Just that ive had troubles with Ali Jas. Some of the shifty sellers on there sent me incorrect LEDs and lamps. Ali wouldnt back me going with the sellers regardless of me supplying proof by photos! Pricks!
thats weird ali has always backed my disputes so far waiting for stuff from china seems to be taki
ng longer than what it used too thats for sure Al.


Title: Re: Enhancer
Post by: phrunt on Monday November 4 2019 14:15:55 AEDT PM
Well my Guitar amp arrived today, the 9v battery one

Using the AMP I can now use the SP01 If I go QED / Guitar AMP / SP01 / External speaker.  It's a bit of a mess of cables though.

I'll mess around with my Quest Wifi and see if I can now find a better solution using the guitar amp.  If I go QED / AMP / Quest wifi then wifi to the SP01 and then extennal speaker I maybe able to be cord free from the QED again which is my aim, I won't use it if it means I'm attached to the detector with cords.  Hopefully that works.


Title: Re: Enhancer
Post by: Blip on Monday November 4 2019 21:20:16 AEDT PM
Thanks Simon.


Title: Re: Enhancer
Post by: dasenator777 on Monday November 4 2019 22:16:39 AEDT PM
i use my guitar amp as follows..... qed.. transmitter... receiver... guiter amp or headphones. i cant see no reason to use the sp01 or en external speaker, as the guitar amp is both. minimal is best in this wireless crap or intrferance starts to raise its ugly head.  ::402::


Title: Re: Enhancer
Post by: dasenator777 on Monday November 4 2019 22:18:27 AEDT PM
al.l so i use bt 4.2 trans and recieve