The history of my Astron 35 metered power supply is that it has been moved around a lot because I have brought it to Field Day for multiple years.
I took it apart today and found that although the connection between the power leads and the bolts was tight, the connection between the bolt and the housing of the power supply had worked a bit loose over the years. I took things apart and tightened the connection between the case and the bolt. It is all back together and working fine. I also have a direct connection between the PS and the K3 using thicker wire. The K3 is working fine right now. In the past I suffered loss of transmit power although RX was fine. I don’t remember the error message but I think it was ERR DSP. With every failure reloading the firmware and calibrating power cleared it up. The information I had was that this error can be associated with erratic power supply issues. From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Don Wilhelm Sent: Saturday, January 28, 2017 7:28 PM To: James Walker <jimmy.wal...@outlook.com>; N2TK, Tony <tony....@verizon.net> Cc: elecraft@mailman.qth.net Subject: Re: [Elecraft] K3 - stuck at MCU LD we upgrading software Jimmy, You should see little voltage sag on transmit, especially at QRP levels. Compare the voltage directly at your power supply terminals between receive and transmit. If it stays up, then check your power cable to the K3 for adequate size wire and good connections. If you have a DC power distribution device like the RigRunner, remove the K3 from it and connect direct from the power supply to the K3. OTOH, if the voltage at the terminals droops during transmit, open the power supply cover and remove the bolt terminals - clean the solder lugs on the inside and the bolts, then reassemble making certain the bolts are tight. If those bolts turn even a little bit when tightening the external bolts, they are not tight. You must have tight connections at the power supply. 73, Don W3FPR On 1/28/2017 3:49 PM, James Walker wrote: > Yours is not the Astron power supply I was using. Mine was the 35A, > transformer style, not switching, with dual meters. I’m still using it for > other radios with no problem. And yes, I did check the voltage reading on the > K3/100 and it did reduce severely under any load, even QRP. That’s a strange > quirk in the equipment but I think that’s it. > > Jimmy Walker > WA4ILO > Macon, GA > ______________________________________________________________ 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 Message delivered to gthorn...@thorntonmostullaw.com<mailto:gthorn...@thorntonmostullaw.com> ________________________________ ______________________________________________________________ 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 Message delivered to arch...@mail-archive.com
