Melodious MX-U8 USB Interface 8 Core XMOS chip

[rb2013]

  Mine is from April as well. So far no issues with drops. I hope that they will not appear in the future.
I'm using it under Linux (Daphile), so no drivers required.

I was thinking about this today -and a few reasons that I may be having so issues where others have not is the fact I use the spdif coax output only - not the I2S output.  Neither of my beloved DACs have an I2S input.  So for me that's not an option.  The other factor could be that I use the SoX upsampler in Foobar and upsample the 16/44 Redbook WAV files to 192k for one DAC and 96k for the other.

The sound I hear is improved on these redbook files using this software - although it does push the DDC harder. The data stream is much larger - so harder to keep up with -the limit for spdif coax is 192k so that is the limit for the pathway.
 
For folks not using upsampling the data stream would not be a challenging.

 

[vvolant]

Hi
 
today I opened the box. here are some pictures of the inside (stock unit). It seems that the filter caps are not panasonic. Could somebody identify them?
They are 16V caps.
I also would like to identify the "crappy" bridge diodes which are better to be replaced and if would be happy to have an advice on which diodes are better and easy to install.
 
Thanks!
 

 
 
 
 

 

[abartels]

 
Yes I might do that.  Might see if they would sell the board without the caps - as I would probably go with better ones anyway.
 
Still curious as to the SPDIF DXIO Pro3a with that Li Ion battery power - for my second system.  Hope they get some more in soon.
 
Alex - do you know which regulator they are speaking about "

world's lowest noise 1.0uV regulator from Analog Devices​

"?​

 
Hi Bob,
 
I don't know what kind of regulator they use, but LT3042 has lower noise.
I have found something interesting for building psu:
 
http://www.diyaudio.com/wiki/The_Wire_-_All_Boards_and_Kits_Explained_Here
 
Scroll down and look at the psu specs,,,,, and costs,,,,,,
 
Not sure if components are included but I think it is,,,

 

[abartels]

  Hi
 
today I opened the box. here are some pictures of the inside (stock unit). It seems that the filter caps are not panasonic. Could somebody identify them?
They are 16V caps.
I also would like to identify the "crappy" bridge diodes which are better to be replaced and if would be happy to have an advice on which diodes are better and easy to install.
 
Thanks!
 

 
 
 
 
 

 
Please take close-up picture of bridge rectifiers, and pictures around caps, can't identifying anything this way
 
BTW, nice to see Melodious is following this thread, otherwise they NEVER would have used 16V caps, nobody does (at least, all the taobao manufacturers,,,,)

 

[abartels]

This is what Panasonic FC looks like:
 

 

[vvolant]

OK
I have panasonic then.
Here are the closest pictures I can take with my mobile phone:

 

[ccschua]

for mounting the CREE diodes, does anyone come across a adaptor board in vertical mounting ?

 

[rb2013]

  OK
I have panasonic then.
Here are the closest pictures I can take with my mobile phone:

Yes they look like Pannie FCs! 
 
Also interesting he has moved the heat sink from the chip to the solderflow HS.

 

[vvolant]

ok
and what about the diodes?
I looked for the ref on the net, it seems they are vishay. Is it worth replacing them?

 

[rb2013]

  ok
and what about the diodes?
I looked for the ref on the net, it seems they are vishay. Is it worth replacing them?

Vishay are decent quality - I'm sure there are better

 

[abartels]

  for mounting the CREE diodes, does anyone come across a adaptor board in vertical mounting ?

 
No adapters, at least none which I know of.
CREE's aren't that difficult to mount, the pannies are smaller, so there's room enough.

 

[Maxx134]

Wonder why it has two bridge rectifiers..
So essentially two power supplies

 

[abartels]

Wonder why it has two bridge rectifiers..
So essentially two power supplies

 
it's something like this:
 

 

[ccschua]

I realise I have the same bridge rect which is vishay. I am more concern about burst of high current feeding forward and backward into the power systems. 
 
however considering its only hundred of milliamps, would this be a concern. 
 
will it be beneficial to change the adp150 caps to OSCON ? what is the value ?

 

[Maxx134]

Look for capacitor specs on "ripple current".

If worried about current, then maybe keep capacitance same value,
Although the only current rush I see would be from bridge rect to caps..