You likely blew one of the Caps in the Low Pass filter. If you open it up and have a look, you will clearly see the damage.
I've seen this done before on a friends that I had to repair for him. I just replaced the blown parts and then swept it with a VNA to ensure it was still operational. Mike va3mw On Sun, Jul 4, 2021 at 3:29 PM Jim Weatherford via Elecraft < [email protected]> wrote: > Last night I was trying to work 80m for the first time in a while, and my > KPA500 faulted. I was tired, and didn't pay attention to the fault code but > simply cleared it and tried again. After a couple of rounds of this, I > smelled something burning and shut off the amp for the night. > This morning I realized that the K3 output power was set to 100W on 80m > even when the KPA500 was in operate mode, which explains the "06 PWRIN HI" > codes when I looked at the fault table. Uh oh! > Luckily, it looks like I'm still getting full power out on all other > bands, so I believe the finals are OK, and I probably smoked components in > the 80m portion of the KPA500 LPF bank. Any thoughts as to which components > are most likely to be damaged by excessive input power? Should I simply > replace all 8 caps and 3 inductors? > 73,Jim WU6K > > > ______________________________________________________________ > 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] > ______________________________________________________________ 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]
