Capacitance in PSU

[Lowrider]

It works again, thanks...

But I still dont know how to measure ripple...

 

[Katapum]

It works again, thanks...

But I still dont know how to measure ripple...

http://basaudio.net/pubs/DIY_2006_1.pdf

page 11

 

[Lowrider]

Obrigado,

But I cannot understand how they change the view to see that detail ???

 

[Svein_B]

Obrigado,

But I cannot understand how they change the view to see that detail ???

To zoom in to a selected area: Hold down the left mouse button to "draw" a square of the area to zoom into. Or use the zoom buttons to zoom in/out.

To pan the plot: Hold down your right mouse button and drag the wiew area around.

Svein.

 

[Salas]

You need to set the delay time in seconds (second box), and not increase the simulation period.

SveinB.

For the attached circuit, and 1sec delay, diff for C4 point = 67.530. Way too unreal. What are the constants to be set for real ripple results?

 

[dsavitsk]

You need to set the delay time in seconds (second box), and not increase the simulation period.

SveinB.

I usually set the sim time to something small, too, to get a good look at the wave form. Here's an example: http://www.diyaudio.com/forums/showthread.php?postid=1438047#post1438047

 

[zigzagflux]

If you set for 30 msec after a delay of 10 seconds, you get ripple across:

C2 = 4mV
C3 = 5.3 uV
C4 = 5.0 uV

All values in RMS

 

[Salas]

Thanks. For 10ms (good for 100Hz) after 30s (all settled), I can see an open and clear 3.1nV one period ripple sine wave for C4.

 

[Lowrider]

Thanks, now I can check ripple, I guess...

 

[misok]

just a little resurrection of original topic..

i'm in similar situation as original poster, technically more-less knowing PSU attributes, but the question of ideal value has been unknown to me (i know the best is to try and hear)

i can see that for example on Russian/Bulgarian etc. forums there is a convention of monstrous values in PSUs, often tens of thousands of uF, the final cap as well, practically on every schematic there. Here i can often see concerns about too attacky or bloated (or mid-high degraded) sound with 100-200uF.

I'd be glad to finally learn something about this.. thanks