I've heard these signals for years on 18080 kHz and up. Perhaps 17M prop is so poor they moved to 20M. There are at times now three distinct stations on 20M CW. They are wider than my 2.7KHz filter. Spectrogram shows they are composed of more than 8 tones, spaced about 200 Hz apart. I seem to hear two stations on each frequency, one strong and one weak -- indicating some kind of linked communications. Turning the beam shows peaks on EU and SA from NC.
The K3 noise blanketer (DSP only t3-7) and narrow filters do a really good job of digging out CW signals under them. 73 de Brian/K3KO Iain MacDonnell - N6ML wrote: >I've heard, in the last couple of days, that the ARRL Intruder Watch is >looking into this. > > ~Iain / N6ML > > >Dave Larson wrote: > > >>It's peaking at 10 over here at a heading of 130 degrees from SE Michigan. >> >>Dave, K8AA >> >>----- Original Message ----- >>From: "Kenneth Moorman" <n...@cox.net> >>To: <Elecraft@mailman.qth.net> >>Sent: Friday, March 27, 2009 11:44 AM >>Subject: [Elecraft] OT: Digital Signals on 20M >> >> >> >> >>>For the past several days I have been seeing a couple of powerful digital >>>signals, S9+, between 14.018 to 14.032MHz. They seem to be comprised of 4 >>>or 5 discrete frequencies rapidly moving around in a bandwidth of about >>>2Khz. When working with a narrow filter it is possible to work through >>>them, with difficulty. With a wide filter, 2.8KHz set to the center of >>>their bandwidth it sounds like a group of castanets clicking away with >>>slightly different tones. I might have just discounted them but for the >>>fact that I have just recently gotten a "poor man's" panadapter using a >>>Rockmite and Z10000 amp from Clifton Labs with the Rocky software >>>monitoring >>>my K3's IF output. These two signals have been here every time I get on >>>20M >>>and are quite impressive in the amount of bandwidth they occupy. I have >>>not >>>seen this on any other band. Forgive my ignorance of digital modes, but I >>>just don't recall hearing this sort of signal before. Can anyone let me >>>know what this might be? >>> >>>Ken, NU4I >>> >>>______________________________________________________________ >>>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 >>> >>> >>-------------------------------------------------------------------------------- >> >> >> >>No virus found in this incoming message. >>Checked by AVG - www.avg.com >>Version: 8.5.285 / Virus Database: 270.11.30/2026 - Release Date: 03/27/09 >>07:13:00 >> >>______________________________________________________________ >>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 >> >> >______________________________________________________________ >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 > > > ______________________________________________________________ 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
