My K3 fan rattles ever so lightly from time to time, it's a little
annoying. But the Powerwerx fan noise is just the sound of the air
flow. It ramps up as ambient temperature and draw increases. I notice
it in the summer when the shack is 80-90F. In winter, with shack temps
of 50-60F, all the fans are quiet-- computer, K3 and PS. 

73,
Drew
AF2Z



On Wed, 15 Apr 2015 06:51:56 +0000, you wrote:

>Interesting and very attractive.
>Two questions:
>1) How (acoustic) noisy is the fan, eg compared to the K3 fan?
>2) Does the fan operate gradually (eg in steps like KPA500) as the temperature 
>increases or is it either fully OFF or ON?
>
>Poul-Erik/OZ4UN
>

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