I have an Astron RM-35 amp linear power supply powering my Flex-3000 and sometimes it will make a loud clank when I turn it on. Has anyone know what causes that kind of racket?
73's Hanford WA4LZC CCA # AC11-12590 Sent from my iPhoney please pardon my typos. On Oct 26, 2012, at 13:01, Dave Beumer WØDHB <d...@w0dhb.net> wrote: > My apologies if this has been posted prior. > > I have had 2 Astron RS-35 power supplies fail in 4 years for the same reason > and apparently others have also. > > If you observe any of the following symptoms with your Astron Linear supply: > > - intermittent Crow Bar > - Sudden loss of output > - Strong burning smell > > On both of my power supplies the screw they used to fasten the regulator > board to the top of the capacitor was too long and bottomed out before the > connection was sufficiently tightened. That in turn caused a bad high > resistance connection that overheated and caused the intermittent triggering > of the over voltage circuit. > > It finally got hot enough to burn the board and damage the capacitor. I > would highly suggest that you check your supply and if they find a similar > situation that you add a star style lock washer between the board on the > first ring terminal and another between the two ring terminals. That should > take enough slop out of it not to bottom the screws and cause a flaky > connection. > > The problem didn't show up until about a year or so after I got the > supplies. One was brand new, the other was 10 years old when I got it. > > After the above fix, both supplies are working fine. > > I think the higher current draw of the V/U unit in my 5000A may have made > the problem crop up sooner. > > > Dave > W0DHB > > > _______________________________________________ > FlexRadio Systems Mailing List > FlexRadio@flex-radio.biz > http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz > Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ > Knowledge Base: http://kc.flexradio.com/ Homepage: http://www.flexradio.com/ _______________________________________________ FlexRadio Systems Mailing List FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ Knowledge Base: http://kc.flexradio.com/ Homepage: http://www.flexradio.com/
