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]
