>From my experience....Once it starts, there's no cure. I think the windings in the transformer eventually start rattling around inside....Maybe you could talk to Astron?
Steve N4LQ ----- Original Message ----- From: "Barry" <[email protected]> To: <[email protected]> Sent: Tuesday, May 17, 2011 11:28 AM Subject: [Elecraft] Astron hum/vibration >I have an Astron RS70M linear supply that I've used for many years to > power everything 12VDC in the shack, including my K3. In my former QTH, > I had it located under the operating desk and never heard a peep from it. > > In my new shack, which is considerably smaller, I hear an annoying hum > from it which seems to be coming from the top of the case. It goes away > if I press down on it. Any ideas how to get rid of the noise? > Tnx, > Barry W2UP > > ______________________________________________________________ > 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 ______________________________________________________________ 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
