Hi to all,
thinking trough all the projekt and reading all the DacEnd
pages there are still a few questions:
@Quang Hao: To what idss should the sk170 in the salas-reg
be matched for best performance?
@andrea: will there be any changes in performance if one would
use 220R IV-Resistors instead 200R?
Do you suppose a sonically upgrade using the ll1660 transformers
in the dacend?
Would you recommend the lundahl digital input-transformer or
which one?
Greetings Ulf
thinking trough all the projekt and reading all the DacEnd
pages there are still a few questions:
@Quang Hao: To what idss should the sk170 in the salas-reg
be matched for best performance?
@andrea: will there be any changes in performance if one would
use 220R IV-Resistors instead 200R?
Do you suppose a sonically upgrade using the ll1660 transformers
in the dacend?
Would you recommend the lundahl digital input-transformer or
which one?
Greetings Ulf
Hi!
@Quang Hao: To what idss should the sk170 in the salas-reg
be matched for best performance?
unnecessary matche 2sk17
@andrea: will there be any changes in performance if one would
use 220R IV-Resistors instead 200R?
It is ok you can you R 220 Ohm,
Do you suppose a sonically upgrade using the ll1660 transformers
in the dacend?
Yes, If you like that, so you can you digital input-transformer the sample
@Quang Hao: To what idss should the sk170 in the salas-reg
be matched for best performance?
unnecessary matche 2sk17
@andrea: will there be any changes in performance if one would
use 220R IV-Resistors instead 200R?
It is ok you can you R 220 Ohm,
Do you suppose a sonically upgrade using the ll1660 transformers
in the dacend?
Yes, If you like that, so you can you digital input-transformer the sample
First things first : a question any boards for full set left ? (been away for awhile)
I haven't read any impression of this implementation vs other AD1865.
For example Adrea did salas regs made some difference in overall performance. I was thinking powering an AD1865 with superegs (or salas) directly, again what are these 431s doing near the chip ?
I haven't read any impression of this implementation vs other AD1865.
For example Adrea did salas regs made some difference in overall performance. I was thinking powering an AD1865 with superegs (or salas) directly, again what are these 431s doing near the chip ?
Good question, I myself thought why are they needed, so I presume these:
- for the analog part I could not find a good answer. One could try without them to see if there is any difference
- for the digital part the one that feeds the AD1865 might be good to separate from the digital voltage but a small 47uH coil as Andrea did might be enough as well
I think they are used for the sake of completeness but they could be left out if one dislikes them.
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YES! the Salas shunt is very very exelent Power supply for DAC or Or any other pre or phono!!!
We use A little post shunt regulators using the TL431 has been inserted to separate all the power supply like suggested in the datasheet of AD1865 and CS8414. And the sound is better!
***I think they are used for the sake of completeness but they could be left out if one dislikes them***
That which is distinct from the other DAC!
You can se in the web: DAC End 2 - the AD1865N-K with single ended vacuum output stage
We use A little post shunt regulators using the TL431 has been inserted to separate all the power supply like suggested in the datasheet of AD1865 and CS8414. And the sound is better!
***I think they are used for the sake of completeness but they could be left out if one dislikes them***
That which is distinct from the other DAC!
You can se in the web: DAC End 2 - the AD1865N-K with single ended vacuum output stage
Yes! but you can wait me will make more some PCB.
now I only have the numbers you have for me please!
Quanghao
431s
I have the same question regarding the use of shunt 431. According to Andrea's DAC Final Test page he states:
"The shunt regulator has been eliminated after the first 30 minutes because the sound was horrible using this and all the +5V has been generated from a single LT1085."
comment: the good LT1085 has a wider frequency response similar to LM317, never use 7805.
I would like to know why now are back again.
I have the same question regarding the use of shunt 431. According to Andrea's DAC Final Test page he states:
"The shunt regulator has been eliminated after the first 30 minutes because the sound was horrible using this and all the +5V has been generated from a single LT1085."
comment: the good LT1085 has a wider frequency response similar to LM317, never use 7805.
I would like to know why now are back again.
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So, we have to wait. Are you gonna take pre orders or wait till the new pcbs arrive ?
If I had my way I'd have these 431s and everything accompanying them taken out of the main board. Maybe an extra board. I know it's kind of fuss, all these extra cables but more freedom is accomplished this way.
All from ebay:
8pcs 270uf 16v Sanyo Os-Con SP Radial Capacitors Oscon $9.90
Item number: 280455671051. (SP should be the best ones)
10pcs N-Channel Silicon Transistor 2SK170 K170 BL Japan $3.70
Item number: 130351188411
2Pcs Elna 4700uF 25V 85'c Capacitors $2.50
Item number: 110477272327
For Tube coupling cap
2 SPRAGUE "Q" PIO CAPS. 1uf 300v. A+ BEST SOUND QUALITY
Item number: 130361625985
Jensen 47uf + 47uf 500V Electrolytic Capacitor
Item number: 180413478642
Dale resistors Welborne Labs Homepage
I was actually thinking about using 100uF film cap on C5 and I've actually got one big Solen MKP 100uF 400V at hand I can use. It has to be mounted off board though.
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