I have the same 'issue' on 20m my SWR on the hustler 6BTV is 1.4but when I operate on that band the internal temperature seems to risemuch faster than other bands and I eventually get a fault. On 40m I have similar SWR on the digital frequencies and there I don't havean issue what so ever. I can work long time with higher output powers (like double that of 20m) It does seem a tuner is required even with lower SWR's due to some reason .. 73 de K6TE Wim On 12/18/2016 6:08 AM, Joe Hutchens AJ8MH-Radio wrote: > This is a question I've been wanting to ask... > > I've had a KPA500 for 4 years and I've noticed that 20 meters requires > more drive. Most bands require 30 watts or less, but 20 requires 35-37 > for 500 watts out. In the phone portion of 20, an SWR of 1.4:1 WILL > cause a fault. It's just real sensitive to the load on 20. I have to > use a tuner and make sure I'm close to 1.1:1. Works fine into a dummy > load, but high drive is still required. > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net
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