Step 1: If it syncs on line as your RFI does, it is Power Line Interference. Call you local power company. They will have the instrumentation to locate the source and if it is their problem they will fix it. If it is a subscriber's problem they will most likely identify the source.
Step 2. If step one fails then contact the RFI group at ARRL. Mike Gruber is on a first name basis with most of the utility companies and has a association with the FCC. The plan is, work with Mike and if all else fails then Mike will get the FCC involved. This type of interference can propogate over the power lines for quite some distance. in my case it turned out to be a bad GFCI outlet in my neighbor's garage. Changed the outlet and problem solved. 73s Jim, W4ATK On Oct 18, 2010, at 7:08 AM, Douglas Furton wrote: > Dear Electrafters, > > Perhaps off topic, I write for advice tackling a problem that > plagues my K2 and QTH: overwhelming RF noise from a source I cannot > identify. > > I've posted a screen shot of an o'scope trace of the IF output from > a parlstar R30 showing the magnitude of this problem at the > following URL. > > http://gegenschein.wordpress.com/2010/10/18/rf-noise-in-the-neighborhood/ > > So, I’ve been working on tracking down the source of this noise. > Here is what I know: > > 1) Noise is persistent, but not always present. Perhaps present 90% > of the time, with no pattern. When present, it is overwhelming. My > K2 noise blanker cannot blank it reliably. > > 2) Noise - 120 Hz pulses - is present from AM broadcast band to > about 20 MHz. > > 3) Source is not in my house. I’ve turned off the main circuit > breaker and operated from battery — noise still overwhelming. > > 4) Noise is on the neighborhood power lines. > > 5) I cannot locate a single source of the noise (walking around with > a portable radio); as noted above, it is on the main power lines in > the hood. > > Please — any suggestions how I might track down this noise source > and quiet it? I first started noticing the problem about 6 months > ago and it has grown steadily worse. Now, I can't imagine how it > could get worse. I am just waiting, now, for whatever is the source > to final go up in a puff of smoke (or move out of the neighborhood). > > ____________________________________________________________ > Send any screenshot to your friends in seconds... > Works in all emails, instant messengers, blogs, forums and social > networks. > TRY IM TOOLPACK at http://www.imtoolpack.com/default.aspx?rc=if2 for > FREE > ______________________________________________________________ > 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 ______________________________________________________________ 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
