[Elecraft] Quiet fans for K3

[Clay Autery]

Well, there are laws of economics for manufacturers, too.  And they are
at times more rigid than those in physics.  <grin>

Yes, I've been doing thermal design for 25 years.  You give me a big
enough pile of money, I'll deliver your target temp at target location,
with </= max specified "noise".

73,

______________________
Clay Autery

On 2/3/2016 3:43 PM, Lynn W. Taylor, WB6UUT wrote:
> So, what is noise?  It's energy.
>
> Some of it goes into the fan and moves air, some is from turbulence
> off the blades, and some heats the bearing.
>
> There are quieter fans that still move lots of air.  They have
> carefully shaped blades and all of the flashing is cleaned off so the
> edges are smooth.  Extra steps that cost more.
>
> I've replaced a lot of computer fans.  If the computer sits next to
> me, I get quiet ones.  If it's in a server closet, I use higher-speed,
> noisy fans, preferably ones with a very high MTBF, because I won't be
> there to hear the server get quiet.
>
> 73 -- Lynn
>
> On 2/3/2016 1:26 PM, Clay Autery wrote:
>> You can BEND the laws of physics, but you can't break them.  Within the
>> package size dictated, you can only move so much air in a given
>> timeframe, "silently".
>
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