Brian C & Brian L I did get an email from the ionosnode folks in Boulder: ---------------------------------------------------------------------------- --------------------------- Dave,
We are indeed operating two ionosondes at our facility on Broadway, in Boulder. I will look over your plots. As a favor, would you attempt to time stamp the phenomena for me? One of our older radars is initiating a sweep at these 15 minute intervals 00, 15, 30, 45 of each hour. Our second radar is initiating a sweep at these 15 minute intervals 05, 20, 35, 50 of each hour. Each broadcast sweep takes ~ 3 minutes. Regards, Rob ____________________________________________________________________________ _______ The QRM I'm seeing is on constantly .. so unless some equipment they have is defective, the are not the source. I'm going try and locate some of the local folks that have directional antennas and see if they are hearing it also. Dave _____ From: Brian C [mailto:[EMAIL PROTECTED] Sent: Saturday, November 29, 2008 8:55 PM To: [EMAIL PROTECTED] Subject: RE: [Flexradio] 40m qrm with harmonics Well, I'm very interested to see what it turns out to be. Hope we can locate it! Brian _____ From: [EMAIL PROTECTED] To: [EMAIL PROTECTED] Subject: RE: [Flexradio] 40m qrm with harmonics Date: Sat, 29 Nov 2008 20:53:09 -0700 Brian Haven't got a portable receiver, but have a buddy with a mobile set-up, I know right where the transmitter is. I could also pack up the 5000 and notebook computer.. Hopefully the NOAA folks will get back to me on Monday . Dave _____ From: Brian C [mailto:[EMAIL PROTECTED] Sent: Saturday, November 29, 2008 6:39 PM To: [EMAIL PROTECTED] Subject: RE: [Flexradio] 40m qrm with harmonics Do you have a portable SW radio and can you drive toward the transmitter site to see if things change at all as you get closer? _____ From: [EMAIL PROTECTED] To: [EMAIL PROTECTED]; [EMAIL PROTECTED] Subject: RE: [Flexradio] 40m qrm with harmonics Date: Sat, 29 Nov 2008 18:21:17 -0700 I will sure keep ya updated. The signal is extremely strong, S9 + 20 the 2nd Harmonic is S9 at least. Hopefully, the NOAA folks will have some answers -- it's pretty annoying. _____ From: Brian C [mailto:[EMAIL PROTECTED] Sent: Saturday, November 29, 2008 6:05 PM To: [EMAIL PROTECTED]; [EMAIL PROTECTED] Subject: RE: [Flexradio] 40m qrm with harmonics Great, let us know what happens. If it's not local, it might be an ionosonde station. Sure looks and sounds like one, but the interval's too short. However, if it's a local, low power test, they might be changing the intervals from the norm. _____ From: [EMAIL PROTECTED] To: [EMAIL PROTECTED]; [EMAIL PROTECTED] CC: flexradio@flex-radio.biz Subject: RE: [Flexradio] 40m qrm with harmonics Date: Sat, 29 Nov 2008 17:54:40 -0700 Brian I am about 7 miles from Boulder -- I've got a an email out to the ionosonde folks. Dve _____ From: Brian C [mailto:[EMAIL PROTECTED] Sent: Saturday, November 29, 2008 5:25 PM To: [EMAIL PROTECTED]; [EMAIL PROTECTED] Cc: flexradio@flex-radio.biz Subject: RE: [Flexradio] 40m qrm with harmonics An ethernet switch could be the culprit. My next guesses would be be either an internet cable modem or a switching power supply. David, how close are you to Boulder? There is a new digital ionosonde station in Boulder, with a 4Kw amplifier, undergoing testing as of November 22, 2008. It's a VIPIR, Vertical Incidence Pulsed Ionospheric Radar installation. http://www.ips.gov.au/IPSHosted/INAG/web-69/2008/boulder_vipir.pdf > CC: [EMAIL PROTECTED]; flexradio@flex-radio.biz > From: [EMAIL PROTECTED] > To: [EMAIL PROTECTED] > Subject: Re: [Flexradio] 40m qrm with harmonics > Date: Sat, 29 Nov 2008 16:14:27 -0800 > > > On Nov 29, 2008, at 10:21 AM, David Beumer W0DHB wrote: > > > Brian > > > > You may be on to something.. I have since found the same pattern at > > around 5 > > Mhz with harmonics in 30m . > > I have also found they are in multiples about every 170Khz or so .. > > They > > swoosh through every 15 seconds or so. > > Mulitples of 170KHz? I have that. It turned out to be my Linksys > managed ethernet switch. > > > > Brian Lloyd > Granite Bay Montessori School 9330 Sierra College Bl > brian AT gbmontessori DOT com Roseville, CA 95661 > +1.916.367.2131 (voice) +1.791.912.8170 (fax) > > PGP key ID: 12095C52A32A1B6C > PGP key fingerprint: 3B1D BA11 4913 3254 B6E0 CC09 1209 5C52 A32A 1B6C > > > > _____ Access your email online and on the go with Windows Live Hotmail. Sign <http://windowslive.com/Explore/Hotmail?ocid=TXT_TAGLM_WL_hotmail_acq_access _112008> up today. _____ Color coding for safety: Windows Live Hotmail alerts you to suspicious email. Sign <http://windowslive.com/Explore/Hotmail?ocid=TXT_TAGLM_WL_hotmail_acq_safety _112008> up today. _____ Color coding for safety: Windows Live Hotmail alerts you to suspicious email. Sign <http://windowslive.com/Explore/Hotmail?ocid=TXT_TAGLM_WL_hotmail_acq_safety _112008> up today. _____ Access your email online and on the go with Windows Live Hotmail. Sign up today. <http://windowslive.com/Explore/Hotmail?ocid=TXT_TAGLM_WL_hotmail_acq_access _112008> _______________________________________________ FlexRadio Systems Mailing List FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ Knowledge Base: http://kc.flex-radio.com/ Homepage: http://www.flex-radio.com/
