[NBLUG/talk] a problem with audio noise

[Mitch Patenaude]

Another thing to keep in mind: Electrolytic capacitors are polarized.  They
need to be hooked up in the right way.  There will be one leg labeled minus
(-), and that leg needs to be hooked up to ground, and the other to the +5
line.  If you get it backwards, you may cause the capacitor to "vent" (i.e.
blow up).

  -- Mitch


On Thu, May 30, 2013 at 2:11 PM, jezra <jezra at jezra.net> wrote:

> Thanks Frank,
> I have a few similar capacitors (a few 6v, one 10v, and some 35v) so
> hopefully something will work. The voltage going to the amp is 5v.
>
>
>
> > Jezra,
> >
> > Use a aluminum electrolytic capacitor.
> >
> > I don't know what the voltage of your power supply is.  5V?  Capacitor
> > companies lie about their voltage ratings.  If you put a 5V cap on a
> > 5V circuit it will eventually blow up or short out or just stop
> > working. Multiply the voltage by at least two, or better yet three.
> > Get a capacitor of that voltage or higher.
> >
> > I don't know anything about your power supply or your amp, but 100uF
> > (micro Farads) should do it.  Smaller would have less effect, but if
> > that's all you have give it a try.
> >
> > Aluminum electrolytic capacitors look like this:
> >
> >
> http://image.made-in-china.com/2f0j00uBVtoMvqfNbl/High-Ripple-Current-Aluminum-Electrolytic-Capacitor.jpg
> >
> >    E Frank Ball                efball at efball.com
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