A NOS 192/24 DAC with the PCM1794 (and WaveIO USB input)

Hello all. Can someone help me.

I had been reading this thread before Christmas, and just after the holidays I decided to jump in and get the DDDAC kit. I brought two DACs one assembled and one to be assembled, an assembled power supply and one to be assembled, with the through that I could look at the assembled versions to workout how to put the other ones together, a kind of electronics by numbers.

Now that I have everything in front of me I and doubting my skills especially as the kits where a fair bit of money. so my question is; is there anyone local to Abergavenny, Monmouthshire that I could drop the bits off to for them to assemble it? of course I would pay for the service.

thanks for any help!
 
Hello all. Can someone help me.

I had been reading this thread before Christmas, and just after the holidays I decided to jump in and get the DDDAC kit. I brought two DACs one assembled and one to be assembled, an assembled power supply and one to be assembled, with the through that I could look at the assembled versions to workout how to put the other ones together, a kind of electronics by numbers.

Now that I have everything in front of me I and doubting my skills especially as the kits where a fair bit of money. so my question is; is there anyone local to Abergavenny, Monmouthshire that I could drop the bits off to for them to assemble it? of course I would pay for the service.

thanks for any help!

For start you might need to consider some hardware helping tools like:

These two will make things clear. Make sure that multimeter can measure Ampers (A), miniAmpers (mA), resistance (Ohm), and voltage AC and DC. Don't need to be expensive.
LAMP-5D-LEDN1 NEWBRAND - Desktop lamp with magnifier | TME - Electronic components
AM-520-EUR BEHA-AMPROBE - Multimetro digitale | TME - Componenti elettronici

And that will give you upper hand. Buy some iron with station (not all in one handle) and make sure has a nice slim tip and aprox 60W. Don't go tooo cheap with it.
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One of these might come in handy
https://www.google.it/search?q=desoldering+pump&hl=it&tbm=isch&tbo=u&source=univ&sa=X&ei=_Cc0VYTaJ8zbaOzggKAD&ved=0CCEQsAQ&biw=768&bih=397

Try diy, and you will never go away from it.
Good luck if you decide to join this team. There are great people here! Many of us are in learning process, like me.
 
Sneak preview. Just as a small teaser 😉

I just finished the DSD converter beta setup now. It is a version where you can select averaging of the DSD stream to decrease noise. It is selectable in 1, 2, 4 and 8 steps. It works very nicely and on the fly, so you hear immediately noise level coming down. I have not been able to do serous listening test, but that will come coming Saturday at Reinhard's place.... Now burn in and I still Need to make some power supplies (now using LAB Supply)

As soon as I know more, I will report back. No need to ask for PCBs as this will not be the final version.... sorry....Final ones for sure will have more functionality, like muting, DC servo and some other aspects I still think & work on.

But the concept technically works now. DSD conversion without any DAC Chips and super Sound (we know that from the Alpha Prototype 😀 )

Oh before I forget, totally stand alone working. No PCM Play back of course. I use the WaveIO with DSD Firmware.

Hi Doede,

To be a "beta" setup is really well done and well promising as usual 🙂

I can't wait to have two of those boards in the hands.

Regards,
Enrico
 
Hey thanks for the encouragement, honestly I don't need much to get me excited about DIY I usually bite off much more than I can chew but get there in the end. I started on a pare of 3.5 way speakers about 5 years ago and after four incarnations have finally finished with a lovely pair of cherry veneered curved sided speakers.

OK I will dig out my soldering station, get it warmed up and start throwing solder around, but be warned I may end up driving some of you mad with my questions.

see you all soon!
 
I have further tweaked the DAC to accept the unregulated power separately for each Left and Right via separate second choke and caps. Digital line is on an entirely seperated unregulated powersupply. Will test them tomorrow and if is worthwhile I will post the block diagrams for those of interests. 😉

Time to place these in the box. 🙂
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Chanh: Absolutely superb !!! please go ahead...

Hi R,

Have now wired up the power supplies! I can hear the improvement but not as big as it was splitting between analog and digital. Nonetheless, improvement are there! I guess it is approaching to the law of diminishing return. Will call this teak as final and proceed with boxing up this baby..!
Best,
Chanh
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Chan, one word of warning. It looks like you are making the same mistake I did. If you connect the isolated side of the S03 via Uf.l's to the DDDAC and use a seperate regulated 5Vdc supply for it, you will connect the ground of that supply (regulated) to that of the rest of the DDDAC, with the parasitic problems that might cause (sounded worse in my case). I'd recommend you use the 5V pin on the DDDAC I2S header to power the isolated part of the S03. See what you make of it.
 
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