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:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
