Want a 4400uF 50WVDC Capacitor

[RFamateur]

Hey, so I'm building a dual polarity power supply and I'm having the hardest time finding the capacitor rating I'm looking for.  I was under the impression this capacitor was fairly common but after digging around it seems to be really hard to find.  I have found 4700uF electrolytic capacitors with a 50 volt rating, but pretty much no 4400uF capacitors.  If anyone has any suggestions on a good place to get these, than please don't hesitate.  Perhaps Jameco?

[Hero999]

You won't find a 4400μF capacitor because it isn't a standard value.

Capacitors are only normally made in E6 values (E12 if you're lucky), look up "preferred value' on Wikipedia for more information.

Just use 4700μF, the chances are it's just a typographical error.

[audioguru]

For a power supply you want filter capacitors with the highest value you can afford or for a certain physical size.

Electrolitic capacitors have a wide tolerance of their value. The minimum value of a 4700uF capacitor might be 3760uF. A 4400uF capacitor might be only 3520uf and have a ripple voltage that is much too high.

[RFamateur]

Thanks guys that was most helpful. On a side note I have been fabricating an old CD player as the case for the power supply, but it's turning out to be more difficult than I originally thought.  Any suggestions on relatively cheap project boxes and the best tools to use for mounting switches, transformers, etc.?

Thanks!