[Shop-talk] Power supply noise?

[Randall]

> Where do I start looking for an alternate fan?  Out of an old 
> PC power 
> supply?  Ebay?

Any electronics stores in your area?  Last time I bought computer fans, it was at Frys; but only because Torrance Electronics was
closed at the time.  Even Best Buy and Radio Shack have some shot at having what you need.

If not, try
http://www.mouser.com

http://marvac.com/SearchResult.aspx?KeyWords=fans

http://www.digikey.com

Of course you'll first have to find out what you need, in terms of both physical size and cfm.  Most likely a computer fan will be
12v DC, but it wouldn't hurt to check that as well.

Usually (though certainly not always), ball bearing fans make more noise for the same air movement.  But they also last longer, and
give you warning when they are about to fail (by getting even louder).  Sleeve fans are quieter to begin with, but fail and stop
without making any extra noise.

Randall