BJ and I are having the devil of a time with line noise. Thanks John, WA5BXO
John, I'd like to know how your progress goes on the issue. I had a similar problem at my former QTH, and HF communication was all but shut down. 80M was the best band with a line noise of about S9+20, and 10M was full scale. I got lucky and tracked the problem to a single offending pole: http://pages.prodigy.net/jcandela/Pole/Pole.JPG The folks that do this kind of noise hunt for a living seem to recommend a directional VHF AM receiver such as a DJ-580 handy talkie with a 3 element yagi, and tuned to AM aircraft frequencies (say 110 MhZ). I used the easier method of my AM car radio tuned between stations at both ends of the dial (say 560 Khz and 1650 Khz). While driving down a road following the power lines, the noise will go up and down over the wavelength received. If the nose peaks at the same spot at multiple frequencies, then your very close to the problem. What surprised me is what happened when I got very close. The noise completely blocked my receiver, and a very distinct and loud 60 hz groan modulation was heard. That groan was only heard close to the problem (within 100 feet) pole whereas the normal line noise was loud at least 100 yards in any direction. At my new QTH I had severe line noise, and still on occasion do. The worst noise was one from my garage door opener, and the VCR my wife uses. Both put out nasty broadband emissions on 80M. Last year a power transformer down the street blew up. Since then things are quieter. Get a battery receiver, and turn off all the power to the shack. You might be surprised to find that the noise source is in your shack/home! Regards, Jim JKO -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.1.405 / Virus Database: 268.11.6/428 - Release Date: 8/25/2006 ______________________________________________________________ AMRadio mailing list Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net AMfone Website: http://www.amfone.net AM List Admin: Brian Sherrod/w5ami, Paul Courson/wa3vjb