[Elecraft] Re:K2/100 Frequency Stability

Mon Dec 16 18:35:26 2002

Please don't do this as it will draw HOT air across the heatsink fins into
the cabinet. I designed the heat flow to pull cool air into the case from
the rear and for it to exit through the front top heatsink fins and the
other case openings. 

As I noted previously, the most efficient method of adding additional
cooling is to move air across the heat sink fins. We have used this for
several DXpeditions running high TX duty cycles in very hot environments and
it runs the heatsink much cooler, resulting in cooler interior temperatures.

If you want to add auxiliary cooling, a 3" 12V fan running at half speed
placed on top of the heatsink (halfway to the rear and 2/3 to the right)
pulling air up and away from the heatsink works well. Putting rubber stick
on feet on the bottom of the fan will keep it in place and space it
correctly for proper air flow.

73, Eric  WA6HHQ
================

Don Brown wrote:
> 
> Hi
> 
> Maybe someone should try reversing the fan to see if pulling the hot air out
> of the K2 would work better. It would make sense that if cool air was pulled
> in through the slots in the bottom and over the RF board before it was
> heated would keep the VFO cooler and at a more even temperature.
> 
> Don Brown
> 
> ----- Original Message -----
> From: "Wallace, Andy" <[email protected]>
> To: <[email protected]>
> Sent: Monday, December 16, 2002 3:03 PM
> Subject: RE: [Elecraft] Re:K2/100 Frequency Stability
> 
> > > -----Original Message-----
> > > From: Don Brown [mailto:[email protected]]
> > >
> > > The K2 already has several places the air can flow out of.
> > > The air is drawn in by the fan and can exit
> >
> > So wouldn't this circulate hot KPA100 air from the underside
> > of the KPA into the K2? It would make more sense to me to have the fan
> > exhaust from the K2. Cool air would be drawn in the various
> > places and out the fan, keeping the overall temperature down.
> >
> > Not having either K2 or KPA100 yet, I could be wrong!
> >
> > -Andy
> >
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