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Ultimate Audio Playback / Playback Tweaks and Source related subjects / Re: USB to PC chassis ground ? (noise) - The biggest change ever !
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on: January 28, 2014, 10:45:01 pm
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Peter, I´d say that with both sides isolated there is a similar hum as when both sides are non isolated. So, more hum than when only the card is isolated.
Now I have a different problem, lately I´ve been using the NOS1 RCA outputs but today I wanted to test some XLR cables and when I plugged the cables in the XLR NOS1 inputs the meters were reading 0.00mv. This happens with both sides isolated and it was n´t happening in the other cases, with only the card isolated or with none of them isolated.
Regards,
Juan
Hi Juan, 0.00mv ? Isn't that the Nirvana that we are all looking for ?  Alain |
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Ultimate Audio Playback / Playback Tweaks and Source related subjects / Re: USB to PC chassis ground ? IMAGE
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on: January 28, 2014, 01:28:47 pm
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By the way, when you still mention the "power supply", even if all works fine since I disconnected (and isolated) the black wire, you are not talking about the 2 toroidal power supplies right ? This shows my total lack of knowledge about electronics...
As far as I understand it should be this wire (coming from USB ground) and not the mains ground you might refer too. See picture. Peter, correct me if I am wrong! Thanks Bert for the picture... I forgot it when I came back yesterday... Yes, this is the wire I detached and isolated Alain |
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Ultimate Audio Playback / Playback Tweaks and Source related subjects / Re: Further Isolation of the Silverstone PCIe - USB Card
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on: January 27, 2014, 02:13:14 pm
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Hi Anthony,
Did you disconnect the chassis ground wires in the NOS1 like Peter suggested in the " best sound ever" disconnected ground thread?
If you didn't its about the USB grounding wire from the USB receptacle to the PSU and the one from the PE to the chassis.
regards, Coen
Hi Coen, There are two of them to disconnect ? There is one that I disconnected from the printed circuit (it is attached to the upper right screw in the right branch when facing the NOS1), but the other ? Regards, Alain |
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Ultimate Audio Playback / Playback Tweaks and Source related subjects / Re: USB to PC chassis ground ? (noise) - The biggest change ever !
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on: January 26, 2014, 04:50:49 pm
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Peter is mentioning need of opening NOS1, doing something in there. I have not opened mine. What (USB thingie) can be isolated fm ground? In the right leg there's the main PSU and (being in front of the NOS1) under the top right bolt of that PSU is a black wire; unscrew the bolt, detach the wire (it is not soldered), isolate it's bare end and ticj it through the sleeves at the right side or something (so you at least know where it's *not* going). Notice : Not the best solution at all because it now may catch "noise" but do NOT detach it from the USB interface as of now because it is too fragile there; also, this is all trialling. Remember, it is part of the isolation at the PC side, and part of the Silverstone setup and without anything else (like using W8) this will NOT work for the better. So let this wire be as it is for now. Just in case I generate an explosion or place an order for a new NOS1 (in the case I really screw things up)... There is this black wire, that starts from the DAC USB port, passes through the "H" and lands at the corner of a printed circuit, tied alone to a screw... Is it this I have to remove and isolate ? Alain |
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I will post a photo later to show what I did... It will be easier for all to see if I did the right (or wrong) thing... 
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