I am watching this with great interest. If running stations on CW my KPA500 shows low-mid 50sC and I have never known what it should be. Thanks everyone.
On Fri, Apr 10, 2020 at 10:27 Randy Farmer <w...@windstream.net> wrote: > If the initial VSWR is really measuring 1.00:1 with low power, that > means the detected reflected power is exceptionally low. I'm sure the > algorithm used to compute SWR sets it to 1:1 if there's zero reflected > power. If the load is not really perfectly flat, as the incident power > is increased the detector will finally see enough reflected energy to > give an indication. You have absolutely nothing to worry about in your > system. > > 73... > Randy, W8FN > > > On 4/10/2020 9:59 AM, Lyn Norstad wrote: > > At 100w on 20m, my KAT500 Utility shows an SWR of 1.00 with the KPA500 on > > Standby and temp around 38ºC. But as I switch the KPA to Operate and > > increase the power to 300w the SWR goes up as high as 1.10. If I hold it > > there (key down) long enough the KPA temp starts rising slowly. At about > > 50ºC I can hear the fan picking up speed. By the time I get to 60ºC the > fan > > is at probably level 2 or 3. SWR is still at 1.10 (max). > > Right or wrong, I've always assumed there is some slight heating in the > > antenna system (Tuner, Balun, Lightning protection) although all > components > > after the tuner are rated at 5 KW. > > 73 > > Lyn, WØLEN > ______________________________________________________________ > 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 w3tb....@gmail.com -- 73 de Ted Edwards, W3TB and GØPWW and thinking about operating CW: "Do today what others won't, so you can do tomorrow what others can't." ______________________________________________________________ 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
