"The KPA500 actually runs cooler at just-below-fault power output than it does at either 500 or even 400 watts output."
I ran a quick test to see if I saw the similar results with my KPA500. The quality of the data is limited by the low resolution of power returned by the ^WS command but it shows that PA heating is 350 +/- 25 W for all output power levels between 150 W and 500 W. Below 150 W the PA heating falls off with power output. The cluster of points close to 500 W lies at about 330 W heating which does support the idea that PA heating will be less at max power output. I did not extend the test beyond 500 W output. I may try the test again with a better controlled drive ramp rate but the quality will still be limited by the resolution of power returned by ^WS. To get better results I'll need to expand my logger capabilities to include sampling of my LP-100A power data. 73, Andy, k3wyc ______________________________________________________________ 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
