You'll get more efficient cooling if you tunnel or otherwise
direct the needed air. If you also install a air-flow switch,
you can wire the contact in series with the PTT to protect the
system from being overheated.
Neil - WA6KLA
---- Original Message ----
From: [EMAIL PROTECTED]
To: Repeater-Builder@yahoogroups.com
Subject: RE: [Repeater-Builder] Re: Fan cooling on PA
Date: Tue, 28 Mar 2006 15:09:43 -0000
>
>> 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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