[Elecraft] KPA 500 Fan Noise and cooling performance

[david Moes]

It would be interesting and perhaps not good in the shack if this were 
the case but these are not electrostatic.

they are nothing more than a fancy venturi to amplify air flow Air 
enters the base of the unit through a “mixed flow impeller” a fancy name 
for a turbo like fan. and is forced out of a slot. The slot runs around 
the inside of the ring-shaped fan body, across a “aircraft wing shape” 
and then outward into the room. In short, it sucks air in through the 
base and blows it out of a very thin slot in the inside of the 
ring-shaped upper body drawing additional air though it.

On 6/19/2012 3:24 PM, Ron D'Eau Claire wrote:
> Has anyone every operated one of those in close proximity to an HF rig?
>
> We built such fans in College waaaaay back in the 1950's and they were a bad
> of an RFI generator as any Tesla coil or Van De Graaf generator in the lab!
>
> After all, they work by electrostatic discharge.
>
> Ron AC7AC
>
> -----Original Message-----
>
> Solution - the Dyson blade less fan. Hihi On Jun 19, 2012 1:41 PM, "Tony
> Estep"<esteptony at gmail.com>  wrote:
>