Do note that the 72C reading was on a day when it was probably around 32C (90F) in the shack. Normal summertime temps in the shack are closer to 27C (80F). Otherwise:
> Are your fans running at max at that temp? Oh yes. They kick into "leaf blower mode" around 55C. > Do the fans blow out to the rear or pull air in? Blows out the back. > What is your supply voltage showing on DISP under full load. 13.6V > Have you done the temperature calibration per the manual, Yep. The rig and a thermocouple in my DMM usually agree within +/- 1C at startup. > and the power calibration. Yes, but just to make sure I ran it again just now. 70W requested gives me about 63W into a dummy load (as measured with my oscilloscope.) You didn't ask, but yes, I'm adjusting my audio input for 5 bars on the ALC meter. Someone else asked about restricted airflow. The rig sits on an open shelf by itself with about 18 inches of clear space behind it and nothing but the ceiling about 4 feet above it. 73 -- Joe KB8AP On Sep 23, 2010, at 6:48 PM, Guy Olinger K2AV wrote: > No, I don't think that is normal variation. 72C is 162F. I think > that is > too high and reflects something else. You would be well served to > chase > that down. > > Are your fans running at max at that temp? Do the fans blow out to > the rear > or pull air in? What is your supply voltage showing on DISP under full > load. Have you done the temperature calibration per the manual, and > the > power calibration. (One soul due to an error was putting out 110 > when he > was set to 60. He too was getting over temps besides his power woes > of only > going up to an indicated 90 watts.) > > 73, Guy. > > On Thu, Sep 23, 2010 at 5:28 PM, Joe Planisky <jp...@jeffnet.org> > wrote: > >> There seems to be some variation in this. I often run around 70W >> and the >> temp usually tops out around 60 - 65C. It's gone as high as 72C on >> a warm >> day. >> >> 73 >> -- >> Joe KB8AP ______________________________________________________________ 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
