I have an old Astron 35A that I have been using for a number of years. I always take it with me to Field Day. Lately I have been having software issues with my K3 that the factory has suggested might be related to an erratic power supply.
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of N2TK, Tony Sent: Saturday, January 28, 2017 11:27 AM To: 'James Walker' <jimmy.wal...@outlook.com> Cc: elecraft@mailman.qth.net Subject: Re: [Elecraft] K3 - stuck at MCU LD we upgrading software Hi Jimmy, Tnx for the info. I have a 35A switcher that loafs along. As I never have both K3's transmitting at the same time I am not taxing the supply. W3FPR got me on the correct track. In your case, di d you check the voltage on the K3? Maybe you had a problem with a connection in the power supply? Down in the Caribbean periodically we have to take apart the Astron linear power supplies and clean the contact surface on the two bolts feeding the 12V output. They develop a little bit of resistance that drops the voltage under a load. 73, N2TK, Tony -----Original Message----- From: James Walker [mailto:jimmy.wal...@outlook.com] Sent: Saturday, January 28, 2017 12:58 PM To: N2TK, Tony <tony....@verizon.net><mailto:tony....@verizon.net%3e> Cc: elecraft@mailman.qth.net<mailto:elecraft@mailman.qth.net> Subject: Re: [Elecraft] K3 - stuck at MCU LD we upgrading software Tony, I used to have this problem all the time. It was maddening. I never knew if the rig was going to turn on. It was always necessary to restart my computer to get my K3/100 to talk to the app that resets the firmware. I had several suggestions to fix the problem. The one that proved most helpful was to get a different power supply. I was using a big Astron supply feeding into a Johnson power strip. Several devices ran off the power supply. It should have been able to supply plenty of power for everything because the other devices were low wattage users like a keyer. Anyway, I had a smaller Anstron device that was once used with a 2-Meter radio. It was fully capable of 100 watts. I hooked it up and the rig as a dedicated supply and it has worked perfectly ever since. You may have a different problem than me but that’s my story. Jimmy Walker WA4ILO Macon, GA > On Jan 28, 2017, at 12:27 PM, N2TK, Tony > <tony....@verizon.net><mailto:tony....@verizon.net%3e> wrote: > > I believe this was addressed a while back but so far have not found it. > > > > Upgraded firmware from 5.54 to 5.56. The one K3 did it fine. The > second K3 is hung up with the TX light flashing and the screen says "MCU LD". > > And the USB port is no longer detected. > > > > I sure hope I don't have to do a complete reset that will cause a loss > of my settings. > > > > Tnx for any advice > > N2TK, Tony > > ______________________________________________________________ > 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 > jimmy.wal...@outlook.com<mailto:jimmy.wal...@outlook.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 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
