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Post by MartinT on Feb 5, 2023 16:15:13 GMT
I hope you've got the balance right, Damien.
I did a lot of this with my previous LKS DAC and it did help in positive ways.
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Post by stellabagpuss on Feb 5, 2023 16:28:14 GMT
I hope you've got the balance right, Damien. I did a lot of this with my previous LKS DAC and it did help in positive ways. Fingers crossed, I'm feel pretty positive, as it's just a exercise in reducing any Hash inside the case. The good news, it can be all put back to stock, even the G Sheild washes of with water. I just have to wait for the power to come back on!
I've also made a Faraday Box for the NUC, so I'm hoping that should bring some additional gains.
I must point out, I am very happy with my set up, it's the best it's ever sounded, but I also like to experiment, as I like tinkering with things, and if I didn't, I simply wouldn't be at level I am now.
I probably need to see a psychiatrist
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Post by mattspl on Feb 5, 2023 18:37:12 GMT
Looks good, will be interesting to hear what you think of the result.
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Post by stellabagpuss on Feb 6, 2023 12:10:42 GMT
As promised, quick photo of the internal sheild for the back of the display unit. lt's a simply affair, thick cardboard, painted with G Shield, holes cut for cables,then covered with lnsulation tape,and few small rubber spacers,to make sure,there isn't contact with the board.  20230206_105538 by Damien Read, on Flickr |
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Post by mattspl on Feb 6, 2023 21:01:01 GMT
Have you tested your mods yet Damien?
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Post by stellabagpuss on Feb 6, 2023 21:42:01 GMT
Have you tested your mods yet Damien? Sadly won't be for a few weeks, hence doing R26 bits now, we having an extension built,which means my power supply to the listening room is down. As you can imagine, l can't wait! |
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Post by mattspl on Feb 6, 2023 21:44:59 GMT
You’ve plenty of fun ahead then. It will be worth the wait.
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Post by stellabagpuss on Feb 13, 2023 22:52:43 GMT
Is it me, or has it been quiet for a few days? Guess we all been enjoying the upturn in the weather. So l'm pleased to report,the Gustard R26 is now back together and working, sadly can't report back soundwise, but it powers up and functions. I am now on phase 2 of my improvements. When l was testing my Faraday Box with my SDR radio, one of the most interesting discoveries was that the biggest polluter for RF noise was my Nord 1ET400A Monoblocks, they really are noisy,in terms of RFI. This in my mind, made them a target for some sheilding. Below is the photo of the stock unit  Nord 1ET400A Monoblock Standard by Damien Read, on Flickr As you can see,the only thing l can see that's been sheilded in the XLR socket. With such a amount of unshielded wires, l got to work,doing my best to sheild the cables with copper and insulation tape.  Nord 1ET400A Monoblock Sheilded by Damien Read, on Flickr And the finished product...l know l will have to wait, just like the R26, to discover the outcome, but l am very confident this,will make a difference, and it surprises me, that the Nord measures so well, hopefully this should lift things again |
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Post by John on Feb 14, 2023 5:09:07 GMT
I look forward to reading your report on the sound
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Post by MartinT on Feb 14, 2023 6:01:07 GMT
High frequency switching amps with switched mode PSUs. No wonder they're noisy.
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Post by stellabagpuss on Feb 14, 2023 7:45:25 GMT
High frequency switching amps with switched mode PSUs. No wonder they're noisy. So true....moving the psu into it's own box would help, but like lots Hypex designs, your landlocked. l bet it would have to be a monster psu to run it on linear psu. Hopefully the screening will help a bit |
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Post by John on Feb 14, 2023 7:59:36 GMT
Speak to Tony I am sure he could build a good monster power supply for the amp
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Post by stellabagpuss on Feb 14, 2023 8:15:43 GMT
It would probably be cheaper to swap amps John! Then the enclosure would probably be massive, although it does make you wonder if its possible?
lt dosent bother me to that extent,the main thing, they're a great sounding amp.
Hopefully it will give a small gain
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Post by MikeMusic on Feb 14, 2023 11:51:45 GMT
Looking good Hopefully proof of good sound very soon Is it my imagination or does TAS seem to have 'special' members ?  |
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Post by stellabagpuss on Feb 14, 2023 12:07:27 GMT
It would probably be cheaper to swap amps John! Then the enclosure would probably be massive, although it does make you wonder if its possible? lt dosent bother me to that extent,the main thing, they're a great sounding amp. Hopefully it will give a small gain You lost me? Special in what way Mike? |
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Post by HD Music & Test on Feb 14, 2023 12:10:32 GMT
They do respond to quality psu's very well but thewy are big due to the big input rail voltages of the Hypex 75-85Vdc, hence why they are switching units high power denisty factor and chinese made. We now stock these for many difference brands are these are a common part to fail.
Yes if you were looking for an amp upgrade at some point then an amplifier change would be more benefical and cost effective than a psu upgrade on these imho
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Post by HD Music & Test on Feb 14, 2023 12:12:41 GMT
Damien,
Why did you stop after just stracthing the surface the biggest culprits opf rfi/emi are still boardcasting their loveliness all ove the amplifier (s) think about what and how a smps works plenty more quality gains to be had with touching a soldering iron yet
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Post by stellabagpuss on Feb 14, 2023 12:30:47 GMT
Damien, Why did you stop after just stracthing the surface the biggest culprits opf rfi/emi are still boardcasting their loveliness all ove the amplifier (s) think about what and how a smps works plenty more quality gains to be had with touching a soldering iron yet That's why you get paid the big bucks! 🤣 I don't really want to get soldering iron out, not skilled enough. Any easy suggestions please say! |
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Post by HD Music & Test on Feb 14, 2023 14:58:52 GMT
Think about the switching frequenices within the power supply and how the interact with the amplifier and conducted emissions, with care measuring for exact sizes you could fabicate an ally can to enlose as much of the chopper section as possible, or even better the whole of ther psu.
BUT be careful to make sure NOTHING touches the psu board, better still put them in a better case with more space to work and one where can use the G2 with gay abandonement.
Its a fiddle but it will help
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Post by stellabagpuss on Feb 14, 2023 15:37:46 GMT
Thanks Tony, l had thought of enclosing, however the PSU needs ventilation.
Another thought l could enclose using mesh,provided the holes are small enough, it should work, and allow heat,although it wouldn't be effective on lower frequencies.
Let see how l get on first, tbh l'm more concerned about heat, l don't know enough to be going to deep l.
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