Thanks to all for the comments. Not being familiar with these things, I thought the UPS could be use for a protracted period of time.
Jim - I’ve been through the exercise of turning off every breaker in the house except the one that supplies power to the shack. I then unplugged everything in the shack except the K3S and rotor control box and turned off the lights. I still had the noise. Bonding didn’t do anything - I only have the K3S, speaker and a rotor control box. I’ve got ferrites out the gazoo! I live in an area with 2-acre zoning and no commercial establishment wishing a couple of miles. So, I’m at a loss. Maybe atmospheric noise? John WA1EAZ > On Jul 11, 2016, at 3:05 PM, Jim Brown <j...@audiosystemsgroup.com> wrote: > > On Mon,7/11/2016 11:36 AM, stengrevics wrote: >> To deal with a power line noise problem, someone suggested I try an >> uninterruptible power supply (UPS). > > > Bad idea, for several reasons. First, power line noise is created by a > defective component in the power system arcing, and radiated by power wiring > close to the where the arc occurs. This radiated noise is like any other RF > signal -- it propagates, and our antennas receive it. It is VERY unlikely to > be conducted into our equipment via our own power wiring. > > Second, UPS units are often noise sources themselves. > > Third, how do you know that what you hear is power line noise? Much of the > noise we hear in our radios is created by electronic equipment of all sorts. > > Study http://k9yc.com/KillingReceiveNoise.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 jstengrev...@comcast.net ______________________________________________________________ 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
