On Thu, Mar 15, 2012 at 6:00 PM, Jim Bennett <[email protected]> wrote: > ...Every so often, perhaps once every 20 - 40 seconds or so, I see some sort > of spur go flying across the screen..... ================ I see 'em too, Jim, and I know they're for real because I can hear them in my headphones. I don't know if you usually use headphones, but if you do I'm pretty sure you too will hear the spurs as they fly across.
Some of these may be beacons. There are some beacons that sweep from low to high, with antennas that shoot straight up; they are used by NOAA or some agency (don't know which) to map the MUF. And of course there are many sources of pure garbage, such as those described by Jim W0EB in his interesting post. There are also innumerable sources of non-sweeping junk being radiated throughout the spectrum. I guess somebody knows what it all is, but I sure don't. One of the most irritating appears as a bunch of closely-spaced carriers that show up on the spectrum as a hump-shaped series of vertical lines, and sounds like a table-saw. I see this at various times and places on all bands. At my QTH one of these seems to come on whenever there's juicy but weak DX on 30 meters. Tony KT0NY -- http://www.isb.edu/faculty/facultydir.aspx?ddlFaculty=352 ______________________________________________________________ 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
