[Elecraft] Quiet fans for K3

[Lynn W. Taylor, WB6UUT]

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".