Just tried a dummy load. No hum. So must be RF. On to the hunt! Thanks, folks. Carl K8NU
> On Apr 5, 2020, at 4:59 PM, Ken Winterling <wa2...@gmail.com> wrote: > > Carl, > > Does this also happen when directly connected to a dummy load? If not then > maybe you have an RFI problem. Check all antenna connections and jumpers. > > GL! > > Ken > WA2LBI > > > > On Sun, Apr 5, 2020 at 4:51 PM Carl Yaffey <cyaf...@columbus.rr.com > <mailto:cyaf...@columbus.rr.com>> wrote: > I have developed a loud hum with the KPA1500 on 17m and 15m. A slight hum on > 20m. All other bands, no hum. > It’s power dependent. Loud at full power, hum reduces as power is lowered. > Not too bad at 500w. > Suggestions? > 73. > > Carl, K8NU. > ______________________________________________________________ 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
