[Elecraft] Successfully using a micro fan to keep K2 cool

[Don Wilhelm]

Don,

Not to argue with your success, it is generally more efficient to use 
the fan to direct air AWAY from the surface to be cooled rather than 
toward it.  The heat of the fan energy is not added to the air that is 
doing the cooling, but then those muffin fans do not add very much heat 
energy, so it may be a moot point for the KPA100 heat sink.

73,
Don W3FPR

Don Ehrlich wrote:
> This has been suggested many times by others.. now it is my turn to repeat 
> it I guess:
>
> I mounted a 12 volt  4 inch muffin fan in a simple enclosure and placed it 
> on top of my K2 blowing downward.  I put a suitable resistor in series with 
> the 12 volt supply so that the fan turned slowly and made no noise at all. 
> The muffin fan ran all of the time and the little microfan in the K2 
> (almost) never came on while running cw or ssb.
>
> Don K7FJ
>   
>