I came to the same conclusion and built filters to clear this up too... but then...
I'm down on PJ4 for holiday the past two weeks operating for fun with a portable 3 element beam (20-6) and dipoles for 80 and 40. On Saturday night I was on 40 meters with the amp running at probably 1.4:1 SWR on CW, saw the tuner go into manual mode and saw a good sized thick cloud of black smoke emit from the KPA500. I quickly shut the amp off... but used it fine the following nights on 20 meters and 18 meters. Thought it might be because I don't have a really good station ground, but can't prove that. Guess I'll take the amp apart when I get back to see what's burned up. Until then I'll just keep using it... but not on 40 and 80 meters. Dr. William J. Schmidt - K9HZ / J68HZ/ 8P6HK/ ZF2HZ Owner - Operator Big Signal Ranch Staunton, Illinois email: [email protected] -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Bill OMara Sent: Monday, December 30, 2013 4:40 PM To: 'Igor Sokolov'; 'Jeffrey Otterson'; [email protected] Subject: Re: [Elecraft] K3/KPA500/KAT500 SWR problem I saw the problem when operating a Multi-op contesting and the 80M OP was running 1.5kw and the RF is induced into the 160M Phased inverted L array and the combination of induced energy and the SWR reflected power on the array kick the KAT500 back into a retune mode. So, either local energy on Broadcast energy will both make this happen. I now have built coaxial Stubs and look forward to seeing if this solves my Local energy problem. 73 Bill W4RM ______________________________________________________________ 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
