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 arch...@mail-archive.com
