Yes, it does sound like a solid-state thing. Not enough negative feedback? It may be a reason NOT to run the fans continuously: Once it reaches 60 C, the fan control keeps the temperature fairly stable.
73, Scott K9MA ---------- Scott Ellington --- via iPad > On May 31, 2018, at 10:10 AM, Bill Stravinsky <k3...@yahoo.com> wrote: > > Yup, as the temp climbs the output drops some. Even though I'm glad I got > the solid state amp I still prefer tubes, hi. The drop is anywhere between > 100 to maybe 300 watts. > I never really noted the exact numbers. > > Bill > K3WJV > > p.s. I'm thinking its a normal solid state thing. > > On Wednesday, May 30, 2018, 4:23:47 PM EDT, K9MA <k...@sdellington.us> wrote: > > > I'm using the K3 with the Elecraft interface cable. I've noticed the > the CW drive power required by mine varies considerably, both with > temperature and SWR. If I set the K3 output for a KPA1500 output of > 1500 W output initially, the output will drop to perhaps 1100 W when the > temperature stabilizes at around 65 C. (I've ruled out any change in > antenna impedance, etc.) A similar change occurs if the SWR goes from > 1:1 to 1.2:1 when changing frequency or switching antennas. I haven't > changed the ALC from the default setting. Has anyone else noticed this? > > 73, > > Scott K9MA > > -- > Scott K9MA > > k...@sdellington.us > > ______________________________________________________________ > 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 k3...@yahoo.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
