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 <[email protected]>: > > 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, "[email protected]" <[email protected]> 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 > <[email protected]>: > > 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 > > > > Sent from Yahoo Mail. Get the app > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[email protected] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to [email protected] > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[email protected] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to [email protected] ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected]
