Hi Shane,
I didn't know that, I wait for the definitive BOM of tyhe AYA2 with the genuine list part of the historic AYA for both resistance and caps (Mills, etc...). I believe Pedja maid a long and continuing cooking with parts on the AYAs DAC to improve the SQ. Maybe he canges his mind since the last AYA2 from 2009 ?
@ Pet240 : look at the modyfing Subbu thread : http://www.diyaudio.com/forums/digital-line-level/246003-modifying-subbu-v3-dac-37.html#post3923285 ,but it can't help you here :each layout need its own set up in each system to try to improve the SQ (tonal balance, sometimes subjective transcient and clarity or smoothness in relation to the needs of the system). And all the caps and resistors interact between each other in the device and the result interact with the sound signature of the rest of your devices (amp, pre, wires, speaker). Maybe a short list can let you save times : look at my pdf short list caps, maybe it can help for the two 5 V rails (many polymer tested at 6.3 v...like myself very much the Panasonic LE and the discontinued Sanyo SP... but its not universal as the 2 caps give totaly different sounding and own qualities in the Subbu... so each needs to do him own tests: borring but it worth it).
I didn't know that, I wait for the definitive BOM of tyhe AYA2 with the genuine list part of the historic AYA for both resistance and caps (Mills, etc...). I believe Pedja maid a long and continuing cooking with parts on the AYAs DAC to improve the SQ. Maybe he canges his mind since the last AYA2 from 2009 ?
@ Pet240 : look at the modyfing Subbu thread : http://www.diyaudio.com/forums/digital-line-level/246003-modifying-subbu-v3-dac-37.html#post3923285 ,but it can't help you here :each layout need its own set up in each system to try to improve the SQ (tonal balance, sometimes subjective transcient and clarity or smoothness in relation to the needs of the system). And all the caps and resistors interact between each other in the device and the result interact with the sound signature of the rest of your devices (amp, pre, wires, speaker). Maybe a short list can let you save times : look at my pdf short list caps, maybe it can help for the two 5 V rails (many polymer tested at 6.3 v...like myself very much the Panasonic LE and the discontinued Sanyo SP... but its not universal as the 2 caps give totaly different sounding and own qualities in the Subbu... so each needs to do him own tests: borring but it worth it).
Hi Damien,
He was using PRP resistors in critical locations which were later changed to carbon composites, carbon films elsewhere. The caps he favoured for the (and wait until you see the beautiful regulators on that PCB - for the TDA1541A part anyway) became unavailable and so were also changed. Without doubt the caps you'll find are 1206 SMD PPS from Panasonic. When you see the BOM you will find the recommended components list and also some alternatives to try.
Back to your original question about AMR - they've made it public that they use SMD PPS as well for decoupling, although the (physical) size and value aren't mentioned.
In short, I'm confident that the PPS caps are a good fit.. and the 1206 size will fit AYA's pads perfectly.
Saw a guy wearing a wookie T-shirt walking through the city the other day, cracked me up.
Read the interressant little book "Darwin Effect" from Patrick Tort (maybe translate in english as is a World specialist about Darwin) : It's become clear for me than the Human being came from the Wookie and the wookie came from trees...and trees came from...
!Notice than the wookie is a resistance fighter because all youngs people are shaved, furless... but only wookies surfers are esteemed by sharcs !
Wookies are forbiden in China for ideological reasons since the beach became trendy but their first cousin Pandas are liked, notice than the wookies doesn't heat the bamboos but smoke it !
Yes I saw some old pictures : the original seems to have some Sanyo SP caps near the TDA (like the actual flagship of AMR cause they bought a NOS stock); some red Mills, main caps was blue and remind me a Nichicon ref
Read the interressant little book "Darwin Effect" from Patrick Tort (maybe translate in english as is a World specialist about Darwin) : It's become clear for me than the Human being came from the Wookie and the wookie came from trees...and trees came from...
Notice than the wookie is a resistance fighter because all youngs people are shaved, furless... but only wookies surfers are esteemed by sharcs !
Wookies are forbiden in China for ideological reasons since the beach became trendy but their first cousin Pandas are liked, notice than the wookies doesn't heat the bamboos but smoke it !
Yes I saw some old pictures : the original seems to have some Sanyo SP caps near the TDA (like the actual flagship of AMR cause they bought a NOS stock); some red Mills, main caps was blue and remind me a Nichicon ref
Oh you're worse than I am ..
If you wrote a book, not only would I read it, I'd pay to have it illustrated and provide the fur covered pens for the book signing.
I have to find money to edit my first book to 20 issues !
It's a biography about Palpatine, title is "how i should stop the development of my Black Star DAC as it becomes a little too big,not really WAF proof, so expensive to build and too far of my speakers !" .... (think about an another title : "the dark side of DIY with one hand: how to solder now ?!" )
No news of Pedja yet... Does he redesign all the AYA-2 ? Do we have maybe something better than the little AMR ?!
To be continued...
It's a biography about Palpatine, title is "how i should stop the development of my Black Star DAC as it becomes a little too big,not really WAF proof, so expensive to build and too far of my speakers !" .... (think about an another title : "the dark side of DIY with one hand: how to solder now ?!" )
No news of Pedja yet... Does he redesign all the AYA-2 ? Do we have maybe something better than the little AMR ?!
To be continued...
Hi guys,
Result is not guaranted as I don't believe in an absolute best cap : depends on the layout and your own populated pcb and whole devices hifi system but I will do test on the Distinctive board as I have all the polymer of the marbet in 470 uf but the R7 of Panasonic (but which don't please me in a lower value). My thinking it plays very well in a particular layout : the subbu DAC with some caps and coils and ldo regs before !
But as the result was particulary better with this LE serie (constructor ref in my pdf page 37 on the Modyfing Subbu DAc thread) : you may test it, try to stay very close to the voltage needed : 6.3 V for 5 V rails and 16 or 25 V for 16 V rails of the TDA !
Finally I mistake in the interest grup buy as it xas not the good place to ask that : (I ask again here) :
Originally Posted by ryanj
I still have to put my name down for Ians PCM converter board, do you know the cost Shane?
So do I... Shane convince me to do it even if the price is a little high for me ! But Here I'm a liitle lost in the many IanCanada's items ! What are the items needed for simultanous mode ? I2S to PCM also ?
My understanding is most of the input daughter board with high frequencies generate glitch because of the low NOS speed needed at the end for the TDA chip : 6.4xx fhz: (input of John in him ultimate TDA1541 thread)?! But I didn't find input with such standalone frequencies ! In anaother way, Andrea fellow has designed a clock board at 12.xxx :
What to do here ? My understanding is most of the famous designer like Pedja or Thorsten seems to agree of a very near Crystal or fhz repeater (AMR?) to the dac-chip, but IanCanada FIFO seems to be a new paradigm as well and in the same time agree to follow I2S to PCM & simultanous feed after the call of some fellows....
"Few fellows" who participate to the rock'roll surealism and good adventure of the collaborative development of the "Distinctive-1541 coreboard", what do you think now I open a specific thread to talk about input/output, share shematic, help.... as we know now the date of boards printing ?
Or someone of us open one for input and another for output to make more easy the readings ? I can open one of the both (will prefer the output daughterboard for technical understanding
) ?
Chewie....
Result is not guaranted as I don't believe in an absolute best cap : depends on the layout and your own populated pcb and whole devices hifi system but I will do test on the Distinctive board as I have all the polymer of the marbet in 470 uf but the R7 of Panasonic (but which don't please me in a lower value). My thinking it plays very well in a particular layout : the subbu DAC with some caps and coils and ldo regs before !
But as the result was particulary better with this LE serie (constructor ref in my pdf page 37 on the Modyfing Subbu DAc thread) : you may test it, try to stay very close to the voltage needed : 6.3 V for 5 V rails and 16 or 25 V for 16 V rails of the TDA !
Finally I mistake in the interest grup buy as it xas not the good place to ask that : (I ask again here) :
Originally Posted by ryanj
I still have to put my name down for Ians PCM converter board, do you know the cost Shane?
So do I... Shane convince me to do it even if the price is a little high for me ! But Here I'm a liitle lost in the many IanCanada's items ! What are the items needed for simultanous mode ? I2S to PCM also ?
My understanding is most of the input daughter board with high frequencies generate glitch because of the low NOS speed needed at the end for the TDA chip : 6.4xx fhz: (input of John in him ultimate TDA1541 thread)?! But I didn't find input with such standalone frequencies ! In anaother way, Andrea fellow has designed a clock board at 12.xxx :
What to do here ? My understanding is most of the famous designer like Pedja or Thorsten seems to agree of a very near Crystal or fhz repeater (AMR?) to the dac-chip, but IanCanada FIFO seems to be a new paradigm as well and in the same time agree to follow I2S to PCM & simultanous feed after the call of some fellows....
"Few fellows" who participate to the rock'roll surealism and good adventure of the collaborative development of the "Distinctive-1541 coreboard", what do you think now I open a specific thread to talk about input/output, share shematic, help.... as we know now the date of boards printing ?
Or someone of us open one for input and another for output to make more easy the readings ? I can open one of the both (will prefer the output daughterboard for technical understanding
Chewie....
Hey Chewie 'ol mate..
I really don't know.. but seeing you not getting any replies here.. so.. suspect that you should be able to feed the I2S to PCM board with any I2S source.. and then run the 1541A core board simultaneous mode.
Always enjoy reading your posts. Will take you up on the croissant//
I really don't know.. but seeing you not getting any replies here.. so.. suspect that you should be able to feed the I2S to PCM board with any I2S source.. and then run the 1541A core board simultaneous mode.
Always enjoy reading your posts. Will take you up on the croissant//
You can also omit the IV resistor, and the DAC magically see 1 ohm only
http://www.diyaudio.com/forums/digital-line-level/222464-dac-iv-buffer-need-your-contribution.html
Hi Andrea,
I'm sorry as I litlle hijacked your other thread above but asking the question here is more logical !
can you futur clock board slaving both in same time an USB to I2S Amareno like and a I2S to PCM Ian's board before the Distinctive board (in case we stack you clock above it as talked already) ?
I finished to put my name on the Ians's form for an I2S to PCM to allow the good simultanous mode highlighted by Shane... saw a less expensive (than the complete IanCanada's solution kits) USB to I2D board with clock isolator and NSD XO on it on the DIYHINK website...
I'm sorry as I litlle hijacked your other thread above but asking the question here is more logical !
can you futur clock board slaving both in same time an USB to I2S Amareno like and a I2S to PCM Ian's board before the Distinctive board (in case we stack you clock above it as talked already) ?
I finished to put my name on the Ians's form for an I2S to PCM to allow the good simultanous mode highlighted by Shane... saw a less expensive (than the complete IanCanada's solution kits) USB to I2D board with clock isolator and NSD XO on it on the DIYHINK website...
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Hi Andrea,
Whats the voltage developing across without the resistor in place?.. assuming its not just a simple matter of omitting the I/V resistor (given the cct, it simply cant be), is the replacement device considered linear?.
Regards,
Shane
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