[R-390] DC Fan Noise

[mikea]

On Fri, Apr 07, 2006 at 12:44:21PM -0400, Gord Hayward wrote:
> In an application here, we saw humongous spikes from one of the minuture 
> computer fans.
> I suspect it had electric comutation.  I put in a pi filter - 2 
> electrolytics and a choke.  That
> cleaned the spikes a lot.

I was going to suggest that. Ferrite Beads _also_ can help in some
situations of this sort. 

-- 
Mike Andrews, W5EGO
mikea at mikea.ath.cx
Tired old sysadmin