I used to run my K3S with an auto turn on Rigrunner which I liked very much, convenient. But the voltage drop was concerning. I go direct now to the rig.
Chuck Jack Hawley KE9UW Sent from my iPhone, cjack > On Dec 22, 2019, at 10:21 AM, Don Wilhelm <donw...@embarqmail.com> wrote: > > Tony, > > While those figures with the 10 gauge wire are good, they would be better if > you ran the K3 power directly from the power supply rather than from the > power distribution strip. > > Each connection will have some voltage drop, so in addition to increasing the > wiring gauge, reducing the connection points will help just as much. > > 73 Merry Christmas, or Happy Hanukkah whichever you choose to celebrate. > Don W3FPR > >> On 12/22/2019 10:47 AM, N2TK via Elecraft wrote: >> I have been using an Astron SS-30M power supply for several years to feed >> two K3's. >> I use 12ga wire from the power supply to an MFJ-4012 power strip. From the >> power strip I use 12ga wire to each K3. Total length from power supply to a >> K3 was 8'. Each K3 is set for 100W on 30M into a dummy load. The K3's were >> tested one at a time. The power supply voltage went from 14.38 to 14.30 at >> 100W. >> Both K3's read the same on the K3's internal voltmeter - 14.1V in receive >> and 12.7V at 100W setting on the K3's. The P3 read 107W out. >> Changed the cable to 10ga wire direct from the power supply to each K3. >> Length of each is 7'. Same test. Power supply voltage was still 14.39/14.30. >> Voltage on each K3 was now 14.2v. Key down 13.6V. So, 0.6V drop in 7' of >> 10ga wire. >> P3 output was now 114W. > ______________________________________________________________ > 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 c-haw...@illinois.edu ______________________________________________________________ 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
