Hi all, I was less flustered today and did some more checking...
Discovered the main fuse in the negative supply line from the PSU had blown. I would like to know what reason it could have blown and at this point, presume it was something to do with running 100W on 6M. Thanks to all who e-mailed directly with suggestions. Cheers, Paul > ---------------------------------------------------------------------------------------------------- > *From:* Paul Ormandy ZL4PW <zl...@orcon.net.nz> > *To:* elecraft@mailman.qth.net > *Sent:* Sat, January 1, 2011 11:22:39 PM > *Subject:* [Elecraft] K3 losing RF > > Hi all, > > My K3 has developed a problem... > > Power output is down to 70W and the LCD back-light flickers on tx. The "Low > Voltage" message flicked > up briefly once. > > I suspect a DC power problem but so saying, the voltage at the rig is 13.9V > on transmit at 70W and > the rig is drawing 13A. The problem seems worse on the 6mb. > > If I reduce the output RF control to around 60W, there is no perceptible LCD > flickering. > > I will obtain another 20A power supply tomorrow and see if the problem > persists. > > In the mean time, (apart from running low power), can anyone suggest what I > should start looking for > internally? > > Kind regards, > > Paul > > > -- > Paul Ormandy ZL4PW ZM4M > www.radiodx.com <http://www.radiodx.com/> > www.zl4pw.orcon.net.nz <http://www.zl4pw.orcon.net.nz/> > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net <mailto:Elecraft@mailman.qth.net> > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > -- Paul Ormandy ZL4PW ZM4M www.radiodx.com www.zl4pw.orcon.net.nz ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
