[Elecraft] KPA500 fan noise

[Arthur Nienhouse]

*/I have been so happy with the pair of Noctua fans I put on the back of 
my K3 very very quite moves a lot of air,
so I looked for a way to help my KPA500 cool better because Noctua does 
not make a fan that will work as a replacement for the fan on the amp.

What I did was get a *helper* fan that sits on top of the amp air inlet 
the model number I chose is a
NF-A9x14 PWM92mm I purchased from Amazon it sits on the opening using 
the silicone feet that are supplied
The idle temp before ran at 31c
The idle temp helper fan installed 24c ... in the summer when the shack 
is a lot warmer these numbers are higher.

I use the 12v out put from the K3 to power the *helper* fan is always 
running can't hear it.

This helps in so much as I can get into a cw fix a few minutes longer 
before the big fan kicks in and it sounds like a Tomcat after burners 
lit before carrier launch.

If some one has tried a pair of Noctua fans stacked that could fit the 
back of amp that would be great these are very well developed fans that 
are very very quiet moving a lot of air.

K3 fans
http://www.amazon.com/gp/product/B009NQMESS?psc=1&redirect=true&ref_=oh_aui_detailpage_o09_s00
KPA500 *helper*
http://www.amazon.com/gp/product/B009NQM7V2?psc=1&redirect=true&ref_=oh_aui_detailpage_o00_s00

Regards
Art
ka9zap

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