HI John, that was another idea that I had, prior to seeing the signal out of the Ham bands. It moves very smoothly and seems to be repeated about every ten or 15 minutes, it certainly runs across the complete display that I can show from the SDR, 190 KC display width. when I was just using the 75A2, I had no idea that it was covering any thing like the range that it does, I just heard the yelp as it went acros my passband and I would mutter something like dumbs--t. Bernie ----- Original Message ----- From: <[email protected]> To: <[email protected]> Sent: Thursday, January 21, 2010 10:02 AM Subject: Re: [AMRadio] frequency sweeper
> > I have experienced the same thing; but have no factual knowledge of the > cause. I have always suspected that some of it may be caused by folks > testing their antenna for the low SWR frequency by sweeping the band while > transmitting carrier and watching for a minimum reading. I hope I am > wrong. > > 73, John > > > > > > -----Original Message----- > From: Bernie Doran <[email protected]> > To: Discussion of AM Radio in the Amateur Service > <[email protected]> > Sent: Thu, Jan 21, 2010 8:11 am > Subject: [AMRadio] frequency sweeper > > > I acquired a SDR radio and have been playing with it for about a mo. It > eems very strange tuning with a mouse, but works great as a panadapter > icking up the IF. I have noticed for some time that there are signals > unning up the amateur bands, always assume some fool just changing > requency, however snooping around, I found that the same signals original > utside of the amateur bands and sweep those areas also. it/they appear to > e unmodulated and as a wild guess appear to move about 75 to 100 KC per > econd. My first guess is that they are some sort of propagation testing > canner. does anyone know what these are and who does it, power? > antennas? > ocation? etc? > Or perhaps it is the gov't controlers sending some sort of signal to the > DBs stations with the new information to impress on us!!. ever wonder > why > he NDB stations are located in high population areas? > > _____________________________________________________________ > ur Main Website: http://www.amfone.net > MRadio mailing list > earchable Archives: http://www.mail-archive.com/[email protected]/ > ist Rules (must read!): http://w5ami.net/amradiofaq.html > ist Home: http://mailman.qth.net/mailman/listinfo/amradio > ost: [email protected] > o unsubscribe, send an email to [email protected] with > he word unsubscribe in the message body. > This list hosted by: http://www.qsl.net > lease help support this email list: http://www.qsl.net/donate.html > > ______________________________________________________________ > Our Main Website: http://www.amfone.net > AMRadio mailing list > Searchable Archives: http://www.mail-archive.com/[email protected]/ > List Rules (must read!): http://w5ami.net/amradiofaq.html > List Home: http://mailman.qth.net/mailman/listinfo/amradio > Post: [email protected] > To unsubscribe, send an email to [email protected] with > the word unsubscribe in the message body. > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > ______________________________________________________________ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/[email protected]/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Post: [email protected] To unsubscribe, send an email to [email protected] with the word unsubscribe in the message body. This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
