Shit! Another X-DAC V3 Problem

[leo]

Good on yer XTRProf, look at all this on hands experience you now have

[XTRProf]

Good Sunday to the world and especially the gurus here. Reporting time.

Sorry folks, as copper prices had risen tremendously, most electronic diy shops are not carrying the copper braid. So I have to made do with only 1 screen of copper foil for screening the audio cables. So after doing so and with all wires soldered back in place, with fingers and toes cross, I press for the played to death amanda cd again. U know what, hip hip hurray! The breakup almost all gone with a just a hint of graininess. Wow, this I really learned something about digital electronics. Don't FunKadelic CoWpat with them as there is also the high Fcc or ficc emission like the radio to take into consideration. So now everything is back to normal. Now I'm even more determine to improve the screen with copper tubes and build a Faraday cage each for the analog and digital section. Ya, I know it's extreme but my call sign is partly XTR = extremist.

I will put back the schottkies at reg3 (audio) first to try and will report back later. So guys and gals here, electronics are not so hard to stomich after all. That may partly I inherited some of the trait of my father although I had not done electronics but mechanical engineering. Ya, in engineering u have to take a module on basic electronics whether u like it or not. Sorry, I had forgotten most of the formulae although I still can remember roughly the impedance formulae for caps and inductors under ac condition.

[leo]

Thats good news, well done!

[XTRProf]

leo said:

Thats good news, well done!

Thanks Leo for all your kind and positive encouragements. Hats off to you! You did make the difference in getting me to go further.

Ok, ok, reporting time again and I hope I didn't bore to death all here as I really wanted to share. I put back the schottkies at reg3 (audio) and, wow, the noise floor, dropped quite markedly. The other time I couldn't hear amanda so clearly floating in space and in a recording booth of her own due to the fcc noise thingy. Now towards the dreaded reg2 (digital) with schottkies. No try no gain, right? I'll be back. Hmm....., now sounds like Arnold Schwachenegger, the Californian governor.

[Deleted]

XTRProf
Hey, I told you to get rid of those twisted cables, and go back to the originals long ago, and you are giving that guy with the pussycat for an avatar, the credit !!!
So when are you going to do the job properly and feed in dual regulated DC, WITHOUT the schottkies in the BR ? They will do
the same for that recording as the schottkies did , AND feed cleaner supply to the +5V and +3.3V digital regulators as well.
Alex
1 for TECH, and 0 for Zen ?
IF you really want to up the ante, do what a friend of mine has done : Fit the guts into a 1unit rack case, and in the same case a toroid and dual regulated PSU. You could even fit in a JLH low noise, low impedance add on between the dual reg PSU and the supply rails of the X-DAC !
Alex

[XTRProf]

Hi gurus again,

Fitted back the schottkies into reg2 and the breakup was gone. However, I'm not convinced the schottkies did a great job here thru zen instinct. So tech 1 and zen 1. I've fited the hexfred in and it's better sound then the schottkies at reg 2. So tech 1 zen 2.

I'll be stopping to change things for a while as I had find myself listening to components than listening to music. I want music now and will report further when I had done other changes.

Thanks to Leo and Alex for all their positve and negative encouragements.

[Deleted]

XTRProf
Who did you upset to get a Karma of -3 ? Certainly not me !
SandyK
BTW, this should serve as a warning to those modders who routinely rip out internal cabling and replace with twisted teflon wiring because of it's better conductivity. You may appear to get more definition, but you may also get some induced digital or RF excreta. Have a critical listen to several high quality albums before and after, as the Prof did.
BTW, it shouldn't matter a damn if the diodes were schottky or hexfred, if they were being fed DC instead of AC.

Alex

[XTRProf]

sandyk said:

XTRProf
Who did you upset to get a Karma of -3 ? Certainly not me !
SandyK
BTW, this should serve as a warning to those modders who routinely rip out internal cabling and replace with twisted teflon wiring because of it's better conductivity. You may appear to get more definition, but you may also get some induced digital or RF excreta. Have a critical listen to several high quality albums before and after, as the Prof did.
BTW, it shouldn't matter a damn if the diodes were schottky or hexfred, if they were being fed DC instead of AC.

Alex

Ha, ha, it's not easy to get - Karma! How many have negative karma? Only thru being a caveman, like Mike, in hibernation on nothing but only sound quality will we attain that.

Ya, to all moding a dac, please do take care of the RFI. Better shield properly and be rewarded. This copper foil thingy is only temp as I'm going towards another layer of screen for the wires and, when I have the time, will built Faraday cages for the analog and digital side. I had tempororily retired and hibernating in the wonderous sound I'm getting now until festive season week over.

Alex, with the schottkies ort Hexfreds now, I can also go for a full bloated unregulated power for the analog stages withy perhaps better sound as now I had removed the regulators. KISS and I kissed you. I'm no gay though like Brokeback Mountain, the movie.

[Deleted]

XTRProf
A decent low noise, low impedance power supply will always win over an unregulated supply. Electrolytics all have a resonant impedance. This will affect the sound at that point by accentuating that area slightly.The Kumisa 3 thread with Leo and Allan will further elaborate on the benefits of a HQ supply.
Alex

[XTRProf]

sandyk said:

XTRProf
A decent low noise, low impedance power supply will always win over an unregulated supply. Electrolytics all have a resonant impedance. This will affect the sound at that point by accentuating that area slightly.The Kumisa 3 thread with Leo and Allan will further elaborate on the benefits of a HQ supply.
Alex

Thanks Alex. I will read that up after the festive week.