Just sharing
My DAC already finished (just DAC End + Salas Board)
My friend who built it tells me that sound so good.. (better that his internal DAC in his Creek CDP and his old TDA 1543 DAC)
My question (for agithegreat / appelizo / quanghao) :
Is it normal ? When LED on DAC End boards is OFF when it gets music signal (vice versa it's ON when there's no signal music)
What bour your LED at your DAC boards? (Not at Salas Shunt)
My DAC already finished (just DAC End + Salas Board)
My friend who built it tells me that sound so good.. (better that his internal DAC in his Creek CDP and his old TDA 1543 DAC)
An externally hosted image should be here but it was not working when we last tested it.
My question (for agithegreat / appelizo / quanghao) :
Is it normal ? When LED on DAC End boards is OFF when it gets music signal (vice versa it's ON when there's no signal music)
What bour your LED at your DAC boards? (Not at Salas Shunt)
I already asked before: did you try to switch between two SPDIF sources? or to unplug and plug the spdif rca while running?
If yes: did you have sound right after connecting?
If no: could you please try? 🙂
I'm asking because I want to switch between two sources and not sure it will work without resetting the receiver.
Thanks!
If yes: did you have sound right after connecting?
If no: could you please try? 🙂
I'm asking because I want to switch between two sources and not sure it will work without resetting the receiver.
Thanks!
What kind of resistor is everyone using at R34 of the I/V Stage??
As I noticed it wasnt listed on the BOM..
Everyone putting a 10R there? about 2W??
As I noticed it wasnt listed on the BOM..
Everyone putting a 10R there? about 2W??
i dont have a switch, but i do have a toslink to spif converter.
If i turn it on and off from the mains, the music stops, then starts again.
If i turn it on and off from the mains, the music stops, then starts again.
R34 on the PCb I/V use normal, not need good, becuase it conect to GND.
you can change by one line.
You can see all circuit and the Bom in this link:
http://www.diyaudio.com/forums/blogs/quanghao/236-dac-end-2.html
My question (for agithegreat / appelizo / quanghao) :
Is it normal ? When LED on DAC End boards is OFF when it gets music signal (vice versa it's ON when there's no signal music)
What bour your LED at your DAC boards? (Not at Salas Shunt)[/QUOTE]
Your DAC is nice!
Led on the dac pcb is to report the signal from the CD. when a signal is led off, no signal to the LED light!
Is it normal ? When LED on DAC End boards is OFF when it gets music signal (vice versa it's ON when there's no signal music)
What bour your LED at your DAC boards? (Not at Salas Shunt)[/QUOTE]
Your DAC is nice!
Led on the dac pcb is to report the signal from the CD. when a signal is led off, no signal to the LED light!
@agithegreat / adamus / quanghao :
can you show me where the parts we should test... and what's the normal value
can you show me where the parts we should test... and what's the normal value
It is that: EX
Is it normal ? When LED on DAC End boards is OFF when it gets music signal (vice versa it's ON when there's no signal music)
Is it normal ? When LED on DAC End boards is OFF when it gets music signal (vice versa it's ON when there's no signal music)
Hey guys or tube experts, I need your opinion. I am trying to decide which one to buy.
Thanks again,
Fred
No, it's not bout LED.. LED's problem has solved
I mean.. where we have to measure standard voltage
example : at Q16 = 3-4 V ...... etc
Hi Quanghao,
Though the PCB's were sent later than the time you told me in our private message, they finally arrived today. 😀
Nice boards. Thank you.
But please don't forget to send me the tube I/V stage board plus the high voltage shunt regulator board to me also, of course when they are available.
you should see a voltage between the gate and source of the mosfet of 3V -4v. if its zero then you need to decrease the Rset resistors (27r) by parallelling another 27r.
I actually used 33r X 3 in parallel, which drops 1.98v = 180ma. The dac board takes around 90ma in use, so the mosfets get warm with a heatsink, and the salas shutn can do its job.
set the output voltage of the salas shunt to around 5.5v (ensuring vgs remains at 3-4v). Then then after all the tl431 you should have near enough (within 0.1v) 5v.
I actually used 33r X 3 in parallel, which drops 1.98v = 180ma. The dac board takes around 90ma in use, so the mosfets get warm with a heatsink, and the salas shutn can do its job.
set the output voltage of the salas shunt to around 5.5v (ensuring vgs remains at 3-4v). Then then after all the tl431 you should have near enough (within 0.1v) 5v.
I have one question for members:
What're the benefits of using OS-con instead of electrolytic capacitors in the DAC board?
Can somebody please tell me?
What're the benefits of using OS-con instead of electrolytic capacitors in the DAC board?
Can somebody please tell me?
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