> When adding a Fan on a PA heatsink, should I be moving new air in
blowing it
> onto the heatsink? Or is cooling more efficient when the fan pulls the
> heat away from the heatsink?
>
>
> Thanks in advance,
>
> Daron N7HQR
>
As far as cooling efficiency, I think it is better to blow onto,
rather than pull away from. Pulling away can tend to produce wimpy,
un-directed, low velocity air flow. Blowing onto puts the airflow
where you want it, with more velocity and <action>. Plus, as another
poster points out, you have a way to add filters as needed.
Laryn K8TVZ
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