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:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
