I have had some arcing at 500 watts with my Radio Works 160 meter Carolina Windom which did not happen at lower power and other frequencies. I suspect it is power and SWR related. Willis 'Cookie' Cooke K5EWJ & Trustee N5BPS, USS Cavalla, USS Stewart
________________________________ From: Phil & Debbie Salas <[email protected]> To: [email protected] Sent: Saturday, March 17, 2012 6:18 AM Subject: Re: [Elecraft] KPA500 hi swr error Does it work OK at 100 watts? I had a similar problem several years ago with a different amplifier. Everything worked well up to about 300-watts, then the amp would trip out. Turned out to be a bad UHF elbow that arc'd at high power. Phil - AD5X Something in the antenna or feedline connection might be arcing. 73, matt W6NIA On Fri, 16 Mar 2012 18:41:06 -0500, you wrote: >I put up a 40 meter vertical with elevated ground plane today. The swr >is 1:1 at the bottom of the band (where I operate). For some reason, >after sending a few characters, the KPA 500 suddenly shows high swr and >faults. After resetting, the cycle begins again. I have an analog >swr/watt meter following the KPA500, and it does not show the swr >change. It has also done this on my 80 meter antenna. What is going on? > >Bob ______________________________________________________________ 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
