[Elecraft] KX3/KPA100/Powerwerx Question

[DF3DD@darc.de]

Or this. While vacuuming it’s recommended to block the fan so it cannot rotate. In some cases, when the blades are driven bei the airflow too fast, the fan works as a generator and sends some voltage into the unit - which can be harmless but also can destroy sensitive electronics (if there is any inside the supply).


73
Hans, DF3DD

(Please forgive my english, it was 50something years ago when I learned it at school. And forgive if I write naturalnesses instead of real hints.)



> Am 10.06.2022 um 16:12 schrieb Kevin McQuiggin <mcquiggi at sfu.ca>:
> 
> I suggest taking the lid off of the power supply and inspecting the fan for dust. It can accumulate and affect the free rotation of the fan, generating noise. A vacuuming might be in order.
> 
> 73,
> 
> Kevin VE7ZD/KN7Q
> 
> 
> On June 10, 2022 1:18:51 a.m. PDT, "DF3DD at darc.de" <df3dd at darc.de> wrote:
> Maybe it’s the cooling fan of the power supply. When more power is needed the supply gets warmer and the fan spins faster - so you can hear it then. If it’s too annoying, there are more quiet fans with which you could replace the original fan.
> 
> 73
> Hans, DF3DD
> 
> 
> 
> 
> Am 10.06.2022 um 07:37 schrieb Jim Ruff via Elecraft <elecraft at mailman.qth.net>:
> 
> I have a KX3/KPA100/Powerwerx setup.  When I run the rig with the amp on, my Powerwerx 30 amp power supply makes a whirling sound.  If I run the rig without the amp, the power supply makes no noise.  When I run may K3 it makes no noise.  Is there a problem causing the noise?Thanks,Jim W7JHR
> 
> 
> 
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