A stack of about a year's worth of QST magazines placed atop the power supply does the job here. I believe other magazines would also work.
73, Dale WA8SRA > I have an Astron RS-70M that I use to power the station. It on the > carpeted > floor under a desk. It's probably 30 years old now. I've been inactive > for > several months, so it's been off all summer. Now when I turn it on, it > has > an annoying, low-pitched audible hum. All the screws are tight, though > when > I press down on the top of the case, it goes away. Any thoughts on how to > quiet it down? > Tnx, > Barry W2UP > > > > -- > View this message in context: > http://elecraft.365791.n2.nabble.com/OT-Audible-hum-from-Astron-linear-power-supply-Fixable-tp7593065.html > Sent from the Elecraft mailing list archive at Nabble.com. > ______________________________________________________________ > 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]
