[Elecraft] KPA500 finals blown

[Clay Autery]

Not a bad tip...  Additionally, IF you make sure your input fan has some
sort of filtering device on it, AND that as filtered produces 25%+ more
CFM than the exhaust fan, you will have a VERY slightly positive
pressured chassis which will assist in keeping the internals dust and
dirt free.

Don't make the mistake of just increasing the flow rate of an exhaust
fan...  Might help, but it will cause a slightly NEGATIVE internal
pressure which will overrun the intake vents and start sucking all
manner of grunge into the machine via every available crack and
crevice...  jacks, USB ports, chassis edges, etc.

The less dirt inside, especially on heat sinks, the better.

But again...  first step is to make SURE the unit is healthy and
performing within specs.

73,

______________________
Clay Autery

On 1/21/2016 11:13 AM, Michael Cozzi wrote:
> On the top of the amp install an additional matching fan blowing *in*
> through the intake. One could conceivably wire it to the fan power on
> the amp (though I would check what max draw is for that circuit). This
> will increase the air velocity, turbulence, and the CFM of the entire
> cooling chain.