Mitch, Are you certain it is coming from the K3? I have conditions like that on some bands at my workbench where I have amplifier computer speakers. Since it is not constant, and I don't operate from there, I ignore it, but I would chase it down and kill it if it were at the operating position.
73, Don W3FPR On 11/12/2011 6:04 PM, WD0ECO wrote: > I'm hearing a vibrating humming noise from my K3 when keying CW on 15 meters. > > It is only on 15 meters and only with my beam antenna - not heard on the > dipole or vertical. > > SWR is 1.6 with K3 tuner bypassed (LP-100A meter) and 1.1 with tuner on and > according to K3 meter. Tried different keys - still hum. > > The hum is not heard under 50 watts but gets progressively louder from 50 to > 100 watts. > > I don't notice the hum on 15 meters SSB via mic. > > This just started happening. Any ideas? It doesn't appear to affect output > or have high SWR. Is it hurting anything??? > > 73, Mitch > ______________________________________________________________ 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
