My KPA500 makes a noticeable hum/thump when the laser printer that is on the same circuit draws a lot of current.
73, Matt NQ6N On Wed, Jun 27, 2018 at 12:58 PM Jim Brown <j...@audiosystemsgroup.com> wrote: > On 6/27/2018 10:37 AM, Richard Wade wrote: > > If I had to venture a guess, I would say that somehow the unpowered > KPA500 > > was picking up noise on the shack wiring. Very strange. Is that > possible?? > > It is if equipment in your shack is not properly bonded together, and to > house grounds that are also properly bonded together. Study N0AX's > recent ARRL book on the topic, to which I contributed, or the slides for > a tutorial talk I've done at several hamfests. > > http://k9yc.com/GroundingAndAudio.pdf > > 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 m...@nq6n.com > ______________________________________________________________ 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
