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Old 22nd June 2012, 01:31 PM   #1491
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Default Vref or Vout cap which one colorate more sound

which one of the Vref and Vout caps gives more influence
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Old 22nd June 2012, 01:36 PM   #1492
AndrewT is offline AndrewT  Scotland
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I am inclined to say neither. Just ensure the PSU behaves properly.
However the "golden eared Members" say otherwise.
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Old 22nd June 2012, 02:32 PM   #1493
RCruz is offline RCruz  Switzerland
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Hehe... that depends on what you are powering with the shunt
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Old 22nd June 2012, 02:47 PM   #1494
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Hehe... that depends on what you are powering with the shunt
+1
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Old 22nd June 2012, 04:53 PM   #1495
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Hehe... that depends on what you are powering with the shunt
1) digital chips analog and digital 5V

2) DAC analog output stage

3) preamplifier
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Old 22nd June 2012, 05:26 PM   #1496
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Default sam:

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Originally Posted by samoloko View Post
1) digital chips analog and digital 5V

2) DAC analog output stage

3) preamplifier

I think we need to agree that numbers 2 and 3 above are the same as far as power supply requirements-there are essentially no differences in the needs of a DAC analog stage and a preamp analog stage.
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Old 23rd June 2012, 12:22 AM   #1497
alazira is offline alazira  United States
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Default Vref vs Vout influence

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Originally Posted by samoloko View Post
which one of the Vref and Vout caps gives more influence
I find the Vref caps make more of a difference. My
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Old 23rd June 2012, 11:32 AM   #1498
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I find the Vref caps make more of a difference. My
You aren't alone: welcome to the "Golden Ears Club"

Also is very important low ppm Vref resistance avoiding the trimmer to ensure no drift & no change of resistance due to the hot temperature of the regulator.
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Old 23rd June 2012, 11:35 AM   #1499
AndrewT is offline AndrewT  Scotland
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Originally Posted by merlin el mago View Post
........... very important low ppm Vref resistance avoiding the trimmer to ensure no drift & no change of resistance due to the hot temperature of the regulator.
have you compared the difference that a 5ppm vs a 50ppm resistor would make to the "change" in output voltage.
Have you compared these "resistor" tempcos to the semiconductor tempcos?

Balderdash !!
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Old 23rd June 2012, 11:54 AM   #1500
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I compared a trimmer vs a low ppm Vref resistor.

How do you say "Balderdash !!"
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