WaveIO power supply
The following post explains my WaveIO power supply: http://www.diyaudio.com/forums/digi...pcm1794-waveio-usb-input-285.html#post4053196
Everyone reported that using an external 5V power supply for the WavIO sounded better than using the 5V coming with the USB signal so I installed an external PowerOne Linear power supply. The WaveIO sounded clearly better.
I keep reading that in the digital world it is always better to put a voltage regulator as close as possible to the digital use point so next I put a Belleson 5V SPJ right at the WaveIO external power input terminal block using a small perf board. The sq took another small step in the direction of more musicality and realism. The above post has pictures of this plus a description of the unregulated power source to the Belleson.
The following post explains my WaveIO power supply: http://www.diyaudio.com/forums/digi...pcm1794-waveio-usb-input-285.html#post4053196
Everyone reported that using an external 5V power supply for the WavIO sounded better than using the 5V coming with the USB signal so I installed an external PowerOne Linear power supply. The WaveIO sounded clearly better.
I keep reading that in the digital world it is always better to put a voltage regulator as close as possible to the digital use point so next I put a Belleson 5V SPJ right at the WaveIO external power input terminal block using a small perf board. The sq took another small step in the direction of more musicality and realism. The above post has pictures of this plus a description of the unregulated power source to the Belleson.
Grael - This post is referenced from the Acko web site for use of the S03 with the rpi. http://www.diyaudio.com/forums/group-buys/227502-amanero-isolator-reclocker-gb-98.html#post3916986
The Acko has an isolator and other components my simple reclocker doesn't have. The rpi requires an isolator. I recommend that you stay with the Acko S03.
The Acko has an isolator and other components my simple reclocker doesn't have. The rpi requires an isolator. I recommend that you stay with the Acko S03.
Shipment Status - Update
Dear All,
I am trying to track your shipment done on January 26th
Referring to your posts or PMs look like that as of today only 17 of the 28 PCBs's shipment have been received.
For who in the list of NOT RECEIVED, please give a look to the list below and confirm.
BOARDS RECEIVED
Sterlingmck YES
mbcoffman YES
carlsor YES
naimster YES
kurand YES
simonj YES
JanGr. YES
ed linssen YES
mr_whocares YES
dwjames + thommy YES
Sovereign1 YES
crazyfrog YES
IanS1 YES
pz1 YES
tods YES
nicB YES
superberg YES
BOARDS NOT RECEIVED
PET-240
BDL
brettlb
tuyen
titus2002
rickmcinnis
mk57
zz1969
chevron
odem81
vedior
Thanks and Regards,
Enrico
Dear All,
I am trying to track your shipment done on January 26th
Referring to your posts or PMs look like that as of today only 17 of the 28 PCBs's shipment have been received.
For who in the list of NOT RECEIVED, please give a look to the list below and confirm.
BOARDS RECEIVED
Sterlingmck YES
mbcoffman YES
carlsor YES
naimster YES
kurand YES
simonj YES
JanGr. YES
ed linssen YES
mr_whocares YES
dwjames + thommy YES
Sovereign1 YES
crazyfrog YES
IanS1 YES
pz1 YES
tods YES
nicB YES
superberg YES
BOARDS NOT RECEIVED
PET-240
BDL
brettlb
tuyen
titus2002
rickmcinnis
mk57
zz1969
chevron
odem81
vedior
Thanks and Regards,
Enrico
Hi Enrico,
I've recieved nothing yet and I'm not on the list. Is that because I am recieiving board + parts?
Thanks
Yes juancho, I didn't sent your pcbs, still waiting to receive your parts.
Regards,
Enrico
Got my ccs boards sorted just now and sounding nice.
Thanks for the boards and bits guys. Nice and easy to do a tidy job with these 🙂
Thanks for the boards and bits guys. Nice and easy to do a tidy job with these 🙂
An externally hosted image should be here but it was not working when we last tested it.
Hey enrico,
BOARDS NOT RECEIVED
PET-240
Have them now, least I did till they were placed into the abyss of the passengers seat in the ute.
Thanks for the work!
Laters,
Drew.
BOARDS NOT RECEIVED
PET-240
Have them now, least I did till they were placed into the abyss of the passengers seat in the ute.
Thanks for the work!
Laters,
Drew.
Slight digression ...
Hi all,
I know this is a digression but knowing that you are using the Susumu RG for your DDDAC upgrades I was hoping that maybe ...:
I just broke a 1k Susumu RG and would like to ask if one of you may have 2 spare pcs that I can buy? I know they're available from Mouser & digikey yet I don't plan on buying other parts for the time being and so the shipment/handling would be about USD25 for a <1 USD component ...
Please PM me if you can help.
Thanks & good luck with your upgrades 😉
Jesper
Hi all,
I know this is a digression but knowing that you are using the Susumu RG for your DDDAC upgrades I was hoping that maybe ...:
I just broke a 1k Susumu RG and would like to ask if one of you may have 2 spare pcs that I can buy? I know they're available from Mouser & digikey yet I don't plan on buying other parts for the time being and so the shipment/handling would be about USD25 for a <1 USD component ...
Please PM me if you can help.
Thanks & good luck with your upgrades 😉
Jesper
Hi Jesper,
I have spare 1K susumu but I can send you only next monday... we are moving apartment this Saturday and I already packed all my stuffs.
Regards,
Enrico
Hi Enrico,
Thanks so much - appreciated 🙂
I'll just send you a PM with the practical information - & then, Happy moving 😉
Cheers,
Jesper
Thanks so much - appreciated 🙂
I'll just send you a PM with the practical information - & then, Happy moving 😉
Cheers,
Jesper
Digital Vreg - PPS Film caps and ADM1750 Liner Regulator
Below are pictures of my latest red Main Board build. The only changes from my earlier two red Main Boards is the use of 0.068uf PPS film bypass caps and a 5 volt regulator made from an SOIC adaptor board and the ADM7150 5V Liner Regulator chip. I coupled this with a Buffered DAC board that also had PPS film caps and diy ADM7150 3.3Vregs in the digital section. I also used Susumu RG's for the Rload resistors. The ½ clock delay board from the GB can be seen in the picture of the bottom of the red board. I modified the Main Board to accept an OSCON (top) and PPS film cap (bottom) just ahead of the Vreg just like I had done on all my main boards. The bypass cap after the Vreg is installed through the bottom of the board.
PPS (Polyphenylene Sulfide) is a fairly new capacitor film material that has better high frequency characteristics than PET film and can handle higher temperatures for SMD soldering. These are mentioned as components in some expensive audiophile equipment and professional Mods. These are available as both SMD and through-the-hole capacitors. The mouser part number is 80-SMR5683J100J03L4 and costs about $1usd each in quantities of 10 or more for through-the-hole PPS capacitors.
This DAC exhibited some sound qualities that exceeded anything I had heard in my previous two upgraded DAC builds. The change was small but unmistakable to me: More emotion. Getting drawn into the music more often when trying to do something else. More note sustain and decay. More precise location of instruments and voices along the soundstage. The ADM7150 Vreg should not sound better than the Belleson. More about the ADM7150 Vreg in my next post.
Since I have committed the sin of making more than one change at a time, I ordered another complete set of PPS film caps to install on one of my DAC builds with Belleson Vregs. This should help determine if the PPS caps made the difference I heard. IMO they certainly did no harm.
Below are pictures of my latest red Main Board build. The only changes from my earlier two red Main Boards is the use of 0.068uf PPS film bypass caps and a 5 volt regulator made from an SOIC adaptor board and the ADM7150 5V Liner Regulator chip. I coupled this with a Buffered DAC board that also had PPS film caps and diy ADM7150 3.3Vregs in the digital section. I also used Susumu RG's for the Rload resistors. The ½ clock delay board from the GB can be seen in the picture of the bottom of the red board. I modified the Main Board to accept an OSCON (top) and PPS film cap (bottom) just ahead of the Vreg just like I had done on all my main boards. The bypass cap after the Vreg is installed through the bottom of the board.
PPS (Polyphenylene Sulfide) is a fairly new capacitor film material that has better high frequency characteristics than PET film and can handle higher temperatures for SMD soldering. These are mentioned as components in some expensive audiophile equipment and professional Mods. These are available as both SMD and through-the-hole capacitors. The mouser part number is 80-SMR5683J100J03L4 and costs about $1usd each in quantities of 10 or more for through-the-hole PPS capacitors.
This DAC exhibited some sound qualities that exceeded anything I had heard in my previous two upgraded DAC builds. The change was small but unmistakable to me: More emotion. Getting drawn into the music more often when trying to do something else. More note sustain and decay. More precise location of instruments and voices along the soundstage. The ADM7150 Vreg should not sound better than the Belleson. More about the ADM7150 Vreg in my next post.
Since I have committed the sin of making more than one change at a time, I ordered another complete set of PPS film caps to install on one of my DAC builds with Belleson Vregs. This should help determine if the PPS caps made the difference I heard. IMO they certainly did no harm.
Attachments
Intresting cap find, I wonder how they would do on the dac board(s) it selve, where I suspect they'll have the biggest impact.
I also have the PPS bypass caps on the DAC board in all digital positions. I have 15 PPS caps in all in my build. I suspect that a better bypass cap would have the greatest impact at the PCM1794 chip Vdd.
@carlsor:
I've been listening to panasonic 100 nF PPS SMD capacitors on the VDD supply of my modified DDDAC and these capacitors had a certain quality to them that was different from e.g. 100 nF C0G SMD capacitors from Kemet. I decided to use the C0G's because - to my ears - they imbued a more tonally rich sound than the PPS capacitors. Yet today I tend to conclude that capacitors - even of the same "technology" - may sound quite different depending on the manufacturer.
One technical aspect though is that PPS (to my knowledge) has a steeply rising diffraction factor above about 1 MHz. I remember reading this in a paper from Vishay but right now can't find the reference ... C0G on the other hand has a quite equal and linear dissipation factor.
Anyway, just FYI - in my experience even minute changes to a circuit may be heard so good luck in experimenting ;-)
Greetings,
Jesper
P.S.: in evaluating capacitors for digital decoupling the inductances of the IC pins as well as very low track & capacitor impedances may mean that the decoupling is not effective at many frequencies - one of the reasons I guess why a DAC does not always sound better at higher sample rate. I have done some simulations of this in LTSpice - some of which I posted here:
http://www.diyaudio.com/forums/digi...-dac-pcb-layout-tis-dsd1794a.html#post3537691
In general - for the same low track, pin & component inductances & impedances - smaller capacitor values may cause high frequency resonances ...
I've been listening to panasonic 100 nF PPS SMD capacitors on the VDD supply of my modified DDDAC and these capacitors had a certain quality to them that was different from e.g. 100 nF C0G SMD capacitors from Kemet. I decided to use the C0G's because - to my ears - they imbued a more tonally rich sound than the PPS capacitors. Yet today I tend to conclude that capacitors - even of the same "technology" - may sound quite different depending on the manufacturer.
One technical aspect though is that PPS (to my knowledge) has a steeply rising diffraction factor above about 1 MHz. I remember reading this in a paper from Vishay but right now can't find the reference ... C0G on the other hand has a quite equal and linear dissipation factor.
Anyway, just FYI - in my experience even minute changes to a circuit may be heard so good luck in experimenting ;-)
Greetings,
Jesper
P.S.: in evaluating capacitors for digital decoupling the inductances of the IC pins as well as very low track & capacitor impedances may mean that the decoupling is not effective at many frequencies - one of the reasons I guess why a DAC does not always sound better at higher sample rate. I have done some simulations of this in LTSpice - some of which I posted here:
http://www.diyaudio.com/forums/digi...-dac-pcb-layout-tis-dsd1794a.html#post3537691
In general - for the same low track, pin & component inductances & impedances - smaller capacitor values may cause high frequency resonances ...
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