While our PSU hall of shame thread is fun I thought It'd be fun to have a ripple hall of shame thread too ![Smile](https://cdn.badcaps-static.com/images/smilies/icon_smile.gif)
I'll go first out, it's an industrial PSU that offers +15v -15v -5v +5v rails.
However it has been mounted on a frame with DC/DC converters for producing +12v and -12v as well.
The caps for this have gone a bit high ESR![Wink](https://cdn.badcaps-static.com/images/smilies/icon_wink.gif)
The measured ripple is around 1700mV, or 1.7v!![Eek](https://cdn.badcaps-static.com/images/smilies/eek.png)
After recapping the ripple is gone, also note that the scale on the scope is 50mV/div instead of 500mV per div in this shot![Wink](https://cdn.badcaps-static.com/images/smilies/icon_wink.gif)
-And that's how you know you have a qualifying PSU: the ripple scale needs to be in the volts range or thereabout![Biggrin](https://cdn.badcaps-static.com/images/smilies/biggrin.png)
![Smile](https://cdn.badcaps-static.com/images/smilies/icon_smile.gif)
I'll go first out, it's an industrial PSU that offers +15v -15v -5v +5v rails.
However it has been mounted on a frame with DC/DC converters for producing +12v and -12v as well.
The caps for this have gone a bit high ESR
![Wink](https://cdn.badcaps-static.com/images/smilies/icon_wink.gif)
The measured ripple is around 1700mV, or 1.7v!
![Eek](https://cdn.badcaps-static.com/images/smilies/eek.png)
After recapping the ripple is gone, also note that the scale on the scope is 50mV/div instead of 500mV per div in this shot
![Wink](https://cdn.badcaps-static.com/images/smilies/icon_wink.gif)
-And that's how you know you have a qualifying PSU: the ripple scale needs to be in the volts range or thereabout
![Biggrin](https://cdn.badcaps-static.com/images/smilies/biggrin.png)
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