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<DIV dir=ltr align=left><SPAN class=714404807-30062008><FONT face=Arial
color=#0000ff size=2>More likely (and has been documented in the past) a high
harmonic of the RX's LO is leaking out, and as the GPS signals are barely above
noise anyway, it doesnt take much to disrupt them.</FONT></SPAN></DIV>
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color=#0000ff size=2></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=714404807-30062008><FONT face=Arial
color=#0000ff size=2>73</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=714404807-30062008><FONT face=Arial
color=#0000ff size=2></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=714404807-30062008><FONT face=Arial
color=#0000ff size=2>Dave G0WBX</FONT></SPAN></DIV><BR>
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<FONT face=Tahoma size=2><B>From:</B> Lloyd M. Mitchell
[mailto:lloyd@mitchell-web.net] <BR><B>Sent:</B> 27 June 2008
19:42<BR><B>To:</B> TAPR APRS Mailing List<BR><B>Subject:</B> Re: [aprssig]
GPS Jamming On The Rise<BR></FONT><BR></DIV>
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<TD vAlign=top>If you're using a Garmin GPS V, I can jam it with my FM
broadcast radio on 94.3MHz at 50 ft. I imagine the IF freq's are
mixing. Took me the longest to figure out why in the morning drive I
could not get a fix, but the afternoon drive no problem (different
stations morning and evening) of course this was
pre-Sirus...<BR><BR>Lloyd KO4L<BR><BR>
<DIV>Become a CoCoRaHs Volunteer - </DIV>
<DIV>Report your local rainfall to the NWS</DIV>
<DIV><A href="http://cocorahs.org/" target=_blank
rel=nofollow>http://cocorahs.org</A></DIV>
<DIV> </DIV>
<DIV>My homepage is http://tinyurl.com/bsyn9 </DIV><BR><BR>--- On
<B>Fri, 6/27/08, Stephen H. Smith <I><wa8lmf2@aol.com></I></B>
wrote:<BR>
<BLOCKQUOTE
style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: rgb(16,16,255) 2px solid">From:
Stephen H. Smith <wa8lmf2@aol.com><BR>Subject: [aprssig] GPS
Jamming On The Rise<BR>To: "TAPR APRS Mailing List"
<aprssig@lists.tapr.org><BR>Date: Friday, June 27, 2008, 12:19
PM<BR><BR><PRE>Your APRS tracker could be getting trashed by the car next to you!<BR><BR><BR>Linked from a post on Slashdot today at:<BR> <http://tech.slashdot.org/tech/08/06/27/0426216.shtml><BR><BR>, this news story<BR> <BR><http://sidt.gpsworld.com/gpssidt/Latest+News/National-Space-Symposium-Day-3-OCX-and-GPS-III/ArticleStandard/Article/detail/525875><BR><BR><BR>While most of the post deals with military applications/threats, I <BR>thought this reference to domestic use of jammers was interesting:<BR><BR>"Meanwhile, several Internet sites offer small, localized GPS jammers <BR>for sale in the U.S. domestic market. These include a "GPS Blocker"<BR>with <BR>an advertised 10-meter to 20-meter range for roughly $200. "Just plug <BR>into a standard cigarette lighter with 12 V for power," says the web <BR>page,
"and it will automatically protect you from any GPS tracking on <BR>and within your vehicle. This is a popular item with sales personnel and <BR>delivery drivers, who wish to take lunch or make a personal stop outside <BR>of their territory or route."<BR><BR> <BR><BR><BR><BR>--<BR><BR>Stephen H. Smith wa8lmf (at) aol.com<BR>EchoLink Node: 14400 [Think bottom of the 2M band]<BR>Home Page: http://wa8lmf.com --OR-- http://wa8lmf.net<BR><BR>NEW! World Digipeater Map<BR> http://wa8lmf.net/APRSmaps<BR><BR>JavAPRS Filter Port 14580 Guide<BR> http://wa8lmf.net/aprs/JAVaprsFilters.htm<BR><BR>"APRS 101" Explanation of APRS Path Selection & Digipeating<BR> http://wa8lmf.net/DigiPaths<BR><BR>Updated "Rev H" APRS http://wa8lmf.net/aprs<BR>Symbols Set for UI-View,<BR>UIpoint and APRSplus:<BR><BR><BR><BR>_______________________________________________<BR>aprssig mailing
list<BR>aprssig@lists.tapr.org<BR>https://lists.tapr.org/cgi-bin/mailman/listinfo/aprssig</PRE></BLOCKQUOTE></TD></TR></TBODY></TABLE></BLOCKQUOTE></BODY></HTML>