Anything under 2:1 will allow the TX GAIN calibration to work, but I'd shot for < 1.5:1.
Wayne N6KR On Mar 27, 2015, at 5:27 PM, Phil Hystad <phys...@mac.com> wrote: > I have two dummy loads that might be useful for the 50-watt TX-gain > calibration but neither of them are dead on with a 1:1 SWR and 50 ohms > resistive load. Actually, my smaller 150 watt dummy load is closest with a > range of 42 ohms on the load to about 55 ohms on the high end as I step > through the frequency ranges of my Antenna analyzer. My 1500-watt dummy load > is worse as the resistance goes up to 87 ohms Z (resistive plus reactive) > with 54 MHz test signal (using MFJ 259 analyzer). > > My little Elecraft DL-1 20-watt dummy load (mini-module kit) is best as it is > flat 50-ohms resistive across the entire HF spectrum. I am thinking of using > and following the advice of Wayne to let it cool down between bands. But… > > If I want to let the dummy load cool down between bands then can this be done > using the automated procedure with the K3 utility or do I have to run the > manual procedure. In other words, does the automated procedure allow me to > automate the process on a band by band basis. I have not tried it yet > because I didn’t want to start something until I was ready to finish it (and > I have not installed the latest firmware yet). > > Question: How accurate should the dummy load be — is an SWR of 1.2:1 and > under good enough? > > Question: Does the K3 Utility allow me to perform the TX gain calibration on > a band by band basis? > > Thanks. > > 73, phil, K7PEH > > > ______________________________________________________________ > 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 n...@elecraft.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
