Kpa500 on 60 is illegal unless you have a *measured and documented* VERY lossy antenna that would reduce the effective radiated power to the same as 100 watts on a dipole. The simple 99 percent answer is that on 60m SHUT OFF the Kpa500 and run 100 watts barefoot.
73, Guy K2AV On Thursday, November 12, 2015, W4GRJ <[email protected]> wrote: > Since I have never operated on 60m ever... You figure it out > Jack > W4GRJ > > On Nov 11, 2015, at 3:33 PM, Jim Brown-10 [via Elecraft] < > [email protected] <javascript:;>> wrote: > > On Wed,11/11/2015 12:10 PM, W4GRJ wrote: > > Got the KPA500 back from Elecraft. > > Problem found: L22 and other components in the 60M low pass filter > circuit > > burnt through the LPF PCB. > > 60M LPF??? Last I looked, the US power limit on 60M is 100W relative to > a half wave dipole. > > > > > Repair $650 later: Replaced low pass filter module and installed QSK mod. > > > > On the phone I asked what caused the failure, answer was no idea other > than > > component failure. I understand stuff fails but I thought I would get > more than 2 years before a major expensive failure. > > The LPF is on the output of the amplifier. One possible cause of failure > could be lightning. > > > Previously had a Ameritron ALS-600 for 5+ years never a problem, sold it > to > > purchase the KPA500. > > > > Sometimes the grass is not greener. > > My only experience with an ALS-600 was at a contest station in PJ4 > several years ago. I found it to be a really inferior amp - most of the > time, I was lucky to get 300W out if it. No comparison to a KPA500. > > 73, Jim K9YC > > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[hidden email] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to [hidden email] > > > If you reply to this email, your message will be added to the discussion > below: > http://elecraft.365791.n2.nabble.com/KPA500-troubles-tp7609284p7610243.html > To unsubscribe from KPA500 troubles, click here. > NAML > > > > -- > View this message in context: > http://elecraft.365791.n2.nabble.com/KPA500-troubles-tp7609284p7610259.html > Sent from the Elecraft mailing list archive at Nabble.com. > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[email protected] <javascript:;> > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to [email protected] <javascript:;> > -- Sent via Gmail Mobile on my iPhone ______________________________________________________________ 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 Message delivered to [email protected]
