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]
