I’ll use the right email address this time :)
> From: Gary Ferdinand <g...@w2cs.net> > Subject: Re: [Elecraft] K3/KPA500/KAT500 SWR problem > Date: December 30, 2013 at 9:43:01 AM EST > To: elecraft <elecraft@mailman.qth.net> > > It is my understanding that the KAT500 will monitor the VRFL and will fault > to protect itself if it’s too high. There are some impedances out there that > the tuner can handle at lower power but simply cannot at higher power. So, > as you increase the drive, the VRFL ncreases and the KAT500 faults. When the > tuner faults, it no longer is presenting a tuned system to the KPA500, which > then, in sympathy, faults and shuts down. > > Since the (complex) impedance varies along the feed line, other feed line > lengths might bring the impedance into a range the tuner can accept. Of > course when using a feed line to a multi-band antenna, this might just move > the problem to another band. But if it’s easy to do, try it. Or, if you > have something like a Rig Expert you can plug into where the tuner is and > determine the impedance the tuner sees and use that as a baseline for any > feeder length experiments. > > Good luck and 73, > > Gary W2CS > ______________________________________________________________ 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
