Hi All
For late comers, here's a link to a reduced Parts GB :
http://www.diyaudio.com/forums/grou...8804-spdif-power-supply-pcb-group-buy-93.html
Regards
Phil
For late comers, here's a link to a reduced Parts GB :
http://www.diyaudio.com/forums/grou...8804-spdif-power-supply-pcb-group-buy-93.html
Regards
Phil
You need to add a USB to SPIDF converter.
I've used an http://www.diyaudio.com/forums/group-buys/237301-gb-thread-xmos-dsd-384-khz-32bit-usb.html
but there are plenty of USB to I2S /SPDIF converters for you to choose from.
Amanero, DIYnk, Ian's etc ...
bear in mind that for maximum performance you should use separate PSUs and this will increase the complexity of the project.
Catalin
Dear friends,
Today I could test my DAC with recommended power supply from another member and it worked.It confirms that my power supply is a problem.
I will try to build a dedicated one soon.Thanks for help.
A new Subbu Dac is born. After much trouble with bad parts, either that I messed up soldering or were just defective I finally got my Subbu DAC V3 up and running. After the initial build I found several shorted capacitors and resistors, but after following the circuit diagram I managed to work it out. I've burned it in for a few hours in my garage workshop, but haven't put into my main system for a serious listen yet, I'll do that tonite. But at first blush it sounds very good, clear, open, detailed and dynamic, congratulations to Jean Paul and Subbu. I'll be comparing it to an EZ DAC, and a dual mono twisted pear Opus DAC that I have built earlier. Here are some finished pics, the donut thingy is a power filter. The input selector switches between coax in, optical in, and eventually USB in when I get the chance to put the adaptor into the case.
PJN
PJN
Attachments
Nice build but it is not forbidden to take away the sharp edges after drilling holes (don't know the english word for it but could it be "deburring" ?). A file does wonders there. You won't cut yourself now but you will when you are changing something in the device.
Also some of the connector blocks you choose are not necessary, you have some superfluous connections at the outputs. Better wire the outputs directly to the RCA connectors.
I take the toroid line filters are for taking away RF ?
Also some of the connector blocks you choose are not necessary, you have some superfluous connections at the outputs. Better wire the outputs directly to the RCA connectors.
I take the toroid line filters are for taking away RF ?
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Bob et al,
The power filter is a Jon Risch design, the capacitors are under the board. I've used it before on past builds and in my situation it has provided some benefits with consumer based gear. It might be superfluous with Jean Paul's excellent PSU, but it is cheap insurance. As for Jean Paul, yes you are right there are extra connections, but since I needed to take things apart so many times to track down problems they were very convenient. I did get a chance to listen on a worthy system tonite and was very pleased. It replaced a dual psu EZ DAC, I have found the EZ DAC to have a lot of detail, space, and to have a punchy character, but always felt is was a bit sharp and aggressive. The Subbu Dac has a the same level of detail, a great sense of space, and is more relaxed. Definitely somewhat warmer. All in all I prefer the Subbu Dac.
PJN
The power filter is a Jon Risch design, the capacitors are under the board. I've used it before on past builds and in my situation it has provided some benefits with consumer based gear. It might be superfluous with Jean Paul's excellent PSU, but it is cheap insurance. As for Jean Paul, yes you are right there are extra connections, but since I needed to take things apart so many times to track down problems they were very convenient. I did get a chance to listen on a worthy system tonite and was very pleased. It replaced a dual psu EZ DAC, I have found the EZ DAC to have a lot of detail, space, and to have a punchy character, but always felt is was a bit sharp and aggressive. The Subbu Dac has a the same level of detail, a great sense of space, and is more relaxed. Definitely somewhat warmer. All in all I prefer the Subbu Dac.
PJN
I have some questions about Power supply modifications-
Is there any way that I get BOM parts and use with my current PS?
https://googledrive.com/host/0B35mh...c V3/SUBBU DAC Power Supply V3 Schematics.pdf
https://googledrive.com/host/0B35mh...ubbu Dac V3/SUBBU DAC Power Supply V3 BOM.pdf
My PS has 22-0-22 transformer.GB PS(Group buy power supply)has a regulator(IC1-LM723N) for 5V.It accept input from 2V to 37V.It is adjustable.
Mouser Electronics - Electronic Components Distributor
So can I connect my Transformer to this?
Looking at BOM parts,is it that with either of the voltage input,output will be always fixed to 5V?Or we need different parts to achieve it?
Another way is that I connect GB PS parts(without rectifier)to 24V output of my current PS and let the regulator converts to 5V?
Due to poor knowledge I am asking such questions which can be silly.
Please answer.
Thanks.
Actually I contacted the person who designed this power supply.He confirmed that the DAC needs 300mA current and this power supply outputs 180mA only. So voltage drops when DAC is connected even though the Transformer is big.
