The KPA500 fold back point in firmware is an SWR of 2:1 at its rated output of 500W. (This is based on reflected power and will occur at lower SWRs if the amp is operated above 500W) At that point it first inserts a 3 dB input attenuator and flashes the fault LED. (This is a soft fault.) Slightly reducing drive will reset this back to full gain.
What rig are you driving the KPA500 with? 73, Eric --- www.elecraft.com On 2/13/2012 11:51 AM, Don Etters wrote: > The KPA500 is a great Amp. but it does not like SWR over 1:5 –1 an band width > seems narrow . How have you handled this with you antenna’s . Is anyone using > a tuner any suggestion will be apreciated > > Don > W4DEE > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[email protected] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
